阅读说明：本技术 一种绿色环保型轻集料混凝土及其制备方法 (Green environment-friendly lightweight aggregate concrete and preparation method thereof ) 是由 杨光 汪天宇 张�荣 伊俊 于 2021-10-28 设计创作，主要内容包括：本申请涉及建筑材料技术领域,具体公开了一种绿色环保型轻集料混凝土及其制备方法。本申请的绿色环保型轻集料混凝土,主要由如下重量份数的原料组成：硅酸盐水泥220-280份、水200-250份、机制砂180-250份、河沙130-180份、陶粒120-150份、粉煤灰50-100份、外加剂5-10份、粘结剂5-10份；本申请的绿色环保型轻集料混凝土的制备方法,包括如下步骤：(1)将硅酸盐水泥、机制砂、河沙、陶粒、粉煤灰混合搅拌均匀,即得混合料；(2)将水加入混合料中混合搅拌,加入外加剂、粘结剂,混合搅拌均匀即得。本申请的绿色环保型轻集料混凝土耐久性和强度均较佳。(The application relates to the technical field of building materials, and particularly discloses green environment-friendly light aggregate concrete and a preparation method thereof. The green environment-friendly lightweight aggregate concrete mainly comprises the following raw materials in parts by weight: 280 parts of Portland cement, 250 parts of water, 200 parts of machine-made sand, 180 parts of river sand, 150 parts of ceramsite, 50-100 parts of fly ash, 5-10 parts of an additive and 5-10 parts of a binder; the preparation method of the green environment-friendly lightweight aggregate concrete comprises the following steps: (1) mixing and stirring the Portland cement, the machine-made sand, the river sand, the ceramsite and the fly ash uniformly to obtain a mixture; (2) adding water into the mixture, mixing and stirring, adding the additive and the binder, and mixing and stirring uniformly to obtain the water-based paint. The green environment-friendly lightweight aggregate concrete of this application durability and intensity all preferred.)

1. The green environment-friendly lightweight aggregate concrete is characterized by mainly comprising the following raw materials in parts by weight: 280 parts of Portland cement, 250 parts of water 200, 250 parts of machine-made sand, 180 parts of river sand, 150 parts of ceramsite, 50-100 parts of fly ash, 5-10 parts of an additive and 5-10 parts of a binder, wherein the additive is at least two of aqueous fluorocarbon resin emulsion, a polycarboxylic acid water reducing agent and sodium carbonate, and the binder is at least two of styrene-acrylic emulsion, 1, 2-bis (trimethylsiloxy) ethane and sodium gluconate.

2. The green and environment-friendly lightweight aggregate concrete according to claim 1, characterized in that: the green environment-friendly lightweight aggregate concrete mainly comprises the following raw materials in parts by weight: 270 parts of Portland cement, 240 parts of water, 220 parts of machine-made sand, 240 parts of machine-made sand, 150 parts of river sand, 140 parts of ceramsite, 70-90 parts of fly ash, 6-8 parts of an admixture and 8-9 parts of a binder.

3. The green environment-friendly lightweight aggregate concrete according to claim 2, characterized in that: the additive is composed of at least one of aqueous fluorocarbon resin emulsion and polycarboxylic acid water reducing agent and sodium carbonate according to the mass ratio of (6-8) to (5-8).

4. The green and environment-friendly lightweight aggregate concrete according to claim 3, characterized in that: the additive consists of aqueous fluorocarbon resin emulsion, a polycarboxylic acid water reducing agent and sodium carbonate according to the mass ratio of (3-4) to (6-7).

5. The green and environment-friendly lightweight aggregate concrete according to claim 1, characterized in that: the adhesive consists of styrene-acrylic emulsion, 1, 2-bis (trimethylsiloxy) ethane and sodium gluconate according to the mass ratio of (2-3) to (3-5) to (2-4).

6. The green and environment-friendly lightweight aggregate concrete according to claim 1, characterized in that: 7-8 parts by weight of plasticizer is also added into the raw materials, and the plasticizer is at least two of sodium alginate, hydroxypropyl methylcellulose and polyvinylpyrrolidone.

7. The green and environment-friendly lightweight aggregate concrete according to claim 6, wherein: the plasticizer consists of sodium alginate, hydroxypropyl methylcellulose and polyvinylpyrrolidone in a mass ratio of (1-2) to (2-3).

8. The green and environment-friendly lightweight aggregate concrete according to claim 1, characterized in that: 2-3 parts by weight of a reinforcing agent is added into the raw materials, and the reinforcing agent is any one of polyethylene wax, fatty alcohol-polyoxyethylene ether and cellulose ether.

9. The green and environment-friendly lightweight aggregate concrete according to claim 1, characterized in that: the ceramsite is prepared by putting ceramsite raw materials into sulphoaluminate cement for treatment to form a sulphoaluminate cement coating layer.

10. A method for preparing green environmental protection type lightweight aggregate concrete according to any one of claims 1 to 9, characterized in that: the method comprises the following steps:

(1) mixing and stirring the Portland cement, the machine-made sand, the river sand, the ceramsite and the fly ash uniformly to obtain a mixture;

(2) adding water into the mixture, mixing and stirring, adding the additive and the binder, and mixing and stirring uniformly to obtain the water-based paint.

Technical Field

The application relates to the technical field of building materials, in particular to green environment-friendly light aggregate concrete and a preparation method thereof.

Background

Some problems are sometimes encountered in the construction of highway engineering, for example, the distance between the streets of the civil houses and the highway is too close, so that the construction site of the highway engineering is very small, and in addition, the human flow around the site is large, so that great difficulty is brought to the transportation of construction equipment and materials of the highway engineering. In this case, the road widening work of the current site must be done without increasing additional site area. In order to avoid the influence on the original road and surrounding buildings, the deformation of the road engineering foundation is avoided as much as possible when the road is widened.

The light aggregate concrete has great advantages compared with common concrete, can effectively solve the problem of road widening in the construction process, is convenient to operate and has low construction difficulty.

The light aggregate concrete can be used for improving the stability of the embankment side slope, and the light aggregate concrete replaces part of soil of the side slope, so that the acting force influencing the stability of the side slope is reduced due to the reduction of the mass.

The light aggregate concrete is prepared from light coarse aggregate, light fine aggregate, cement and water, and has apparent density of 1950kg/m or less³The concrete of (1), wherein the lightweight aggregate concrete prepared by using lightweight fine aggregate as aggregate is all-lightweight concrete; the light aggregate concrete prepared by using light fine aggregate as fine aggregate is machine-made sand light concrete. The lightweight aggregate concrete has the functional characteristics of light weight, high strength, heat preservation, heat insulation and the like, and is widely applied to various projects.

The Chinese patent with application publication number CN102838331A discloses a pumping light aggregate concrete formula, which comprises cement, fly ash, a glue material, machine-made sand, ceramsite, an additive and water, wherein the cement is P.042.5-grade cement, the 28-day compressive strength of the cement is 49.6Mpa, the weight percentage of the fly ash is 60-80%, the fineness of the fly ash is 6.3%, the loss on ignition is 3.6%, and the water requirement ratio is 92%; the weight ratio of the water to the rubber material is 0.44. The pumping of the light aggregate concrete solves the problem of pipe blockage of the pumping concrete.

In view of the above-mentioned related technologies, the inventors believe that the ceramsite has a large porosity and a high water absorption rate, resulting in poor durability and strength of concrete.

Disclosure of Invention

In order to improve the durability and strength of concrete, the application provides green environment-friendly lightweight aggregate concrete and a preparation method thereof.

In a first aspect, the application provides a green environment-friendly lightweight aggregate concrete, which adopts the following technical scheme:

the green environment-friendly lightweight aggregate concrete mainly comprises the following raw materials in parts by weight: 280 parts of Portland cement, 250 parts of water 200, 250 parts of machine-made sand, 180 parts of river sand, 150 parts of ceramsite, 50-100 parts of fly ash, 5-10 parts of an additive and 5-10 parts of a binder, wherein the additive is at least two of aqueous fluorocarbon resin emulsion, a polycarboxylic acid water reducing agent and sodium carbonate, and the binder is at least two of styrene-acrylic emulsion, 1, 2-bis (trimethylsiloxy) ethane and sodium gluconate.

By adopting the technical scheme, the admixture is matched with the binder, so that the water absorption of the ceramsite is reduced, and the slump of the lightweight aggregate concrete is further reduced. The polycarboxylic acid water reducing agent in the additive can increase the gas content of the concrete, so that the surface active ingredients in the surface tension of the concrete are reduced; the aqueous fluorocarbon resin emulsion has better hydrophobicity, and can reduce the amount of air bubbles in concrete, thereby reducing the water absorption of the concrete and further improving the durability of the light aggregate concrete; the addition of the sodium carbonate can enhance the waterproof effect of the aqueous fluorocarbon resin emulsion and the polycarboxylic acid water reducing agent on the light aggregate concrete, and simultaneously, the silicate substances in the silicate cement are catalyzed to further crystallize, so that the waterproof effect of the light aggregate concrete is further enhanced, the durability and the strength of the light aggregate concrete are improved, and the admixture interacts with the binder, so that the bonding strength between the light aggregate concrete is enhanced, and the durability of the light aggregate concrete is further enhanced.

Preferably, the green environment-friendly lightweight aggregate concrete mainly comprises the following raw materials in parts by weight: 270 parts of Portland cement, 240 parts of water, 220 parts of machine-made sand, 240 parts of machine-made sand, 150 parts of river sand, 140 parts of ceramsite, 70-90 parts of fly ash, 6-8 parts of an admixture and 8-9 parts of a binder.

By adopting the technical scheme, the proportion of each component in the green environment-friendly lightweight aggregate concrete raw material is further optimized, so that the proportion collocation of each component in the raw material is more reasonable, the effects of the admixture and the binder on other components are fully exerted, the water absorption of the lightweight aggregate concrete is reduced, the slump of the lightweight aggregate concrete is reduced, and the durability and the strength of the lightweight aggregate concrete are improved.

Preferably, the additive is composed of at least one of aqueous fluorocarbon resin emulsion and polycarboxylic acid water reducing agent and sodium carbonate according to the mass ratio of (6-8) to (5-8).

By adopting the technical scheme, the sodium carbonate is dissolved in water as an active molecule, under the permeation action of water, the water is taken as a carrier and is brought into gaps of the concrete along with the water, insoluble dendritic crystals are formed by the transmission and filling of micropores and capillaries of the concrete and are combined with the concrete into a whole, and meanwhile, the aqueous fluorocarbon resin emulsion and the polycarboxylic acid water reducing agent are brought into the gaps of the concrete, so that the waterproof effect of the aqueous fluorocarbon resin emulsion and the polycarboxylic acid water reducing agent on the concrete is improved, the water absorption of the light aggregate concrete is further reduced, and the durability and the strength of the light aggregate concrete are further improved.

Preferably, the additive consists of aqueous fluorocarbon resin emulsion, a polycarboxylic acid water reducing agent and sodium carbonate according to the mass ratio of (3-4) to (6-7).

By adopting the technical scheme, the proportion of the aqueous fluorocarbon resin emulsion, the polycarboxylic acid water reducing agent and the sodium carbonate is further optimized, so that the effect of the admixture on other raw materials in the lightweight aggregate concrete is further improved, the water absorption of the lightweight aggregate concrete is reduced, and the durability and the strength of the lightweight aggregate concrete are further improved.

Preferably, the adhesive consists of styrene-acrylic emulsion, 1, 2-bis (trimethylsiloxy) ethane and sodium gluconate according to the mass ratio of (2-3) to (3-5) to (2-4).

By adopting the technical scheme, the proportion of the three components of the styrene-acrylic emulsion, the 1, 2-bis (trimethylsiloxy) ethane and the sodium gluconate is optimized, so that the proportion collocation of the three components of the binder is more reasonable, the synergistic effect of the binder on the admixture is fully exerted, the effect of the admixture on the light aggregate concrete is increased, and meanwhile, the raw materials of the components in the light aggregate concrete are mixed more fully and the compatibility is better.

Preferably, 7-8 parts by weight of plasticizer is also added into the raw materials, and the plasticizer is at least two of sodium alginate, hydroxypropyl methylcellulose and polyvinylpyrrolidone.

By adopting the technical scheme, the plasticizer can enhance the compressive strength and toughness of the lightweight aggregate concrete, the sodium alginate has higher viscosity and carboxyl, is a high polyuronic acid, can play a better synergistic effect with the raw materials of the concrete, meanwhile, the acting force in the lightweight aggregate concrete can be enhanced, the hydroxypropyl methyl cellulose can improve the brittleness, durability and fatigue resistance of the material, meanwhile, a network structure is formed in the concrete, which plays a role of supporting, reduces the floating of ceramsite in the concrete, and meanwhile, the polyvinyl pyrrolidone is a nonionic surfactant, has oleophilic and hydrophilic groups, has better osmosis effect, adsorption property and corrosion-retarding performance, and reduces the corrosion of the light aggregate concrete, thereby enhancing the compressive strength of the light aggregate concrete.

Preferably, the plasticizer consists of sodium alginate, hydroxypropyl methylcellulose and polyvinylpyrrolidone in a mass ratio of (1-2) to (2-3).

By adopting the technical scheme, the component ratios of the plasticizer are optimized, so that the compounding effect of the sodium alginate, the hydroxypropyl methylcellulose and the polyvinylpyrrolidone is further improved, the floating condition of ceramsite in the light aggregate concrete is further reduced, the homogeneity of concrete mixture is improved, the flowability of the light aggregate concrete is further improved, and the strength and the durability of the light aggregate concrete are improved.

Preferably, 2-3 parts by weight of a reinforcing agent is further added into the raw materials, and the reinforcing agent is any one of polyethylene wax, fatty alcohol-polyoxyethylene ether and cellulose ether.

Through adopting above-mentioned technical scheme, polyethylene wax adds the viscidity that can strengthen the concrete in the light aggregate concrete, and the water absorption rate is low simultaneously, and cellulose ether can increase the cohesion of concrete, has the effect of tackify moisturizing simultaneously, can reduce the micro crack of concrete in the hardening process, and then improves the intensity of light aggregate concrete, and fatty alcohol polyoxyethylene ether can strengthen the compatibility between each component raw materials in the light aggregate concrete, thereby make each component mutually support, and then strengthen the intensity of light aggregate concrete.

Preferably, the ceramsite is prepared by putting the ceramsite raw material into sulphoaluminate cement for treatment to form a sulphoaluminate cement coating layer.

By adopting the technical scheme, the ceramsite is placed in the sulphoaluminate cement, so that the ceramsite is wrapped by a sulphoaluminate cement shell layer, the water absorption of the ceramsite is reduced, the porosity of the ceramsite is reduced, the water absorption of the green environment-friendly light aggregate concrete is reduced, the slump of the light aggregate concrete is reduced, and the durability and the strength of the green environment-friendly light aggregate concrete are enhanced.

In a second aspect, the application provides a preparation method of green environment-friendly lightweight aggregate concrete, which adopts the following technical scheme:

a preparation method of green environment-friendly lightweight aggregate concrete comprises the following steps:

(1) mixing and stirring the Portland cement, the machine-made sand, the river sand, the ceramsite and the fly ash uniformly to obtain a mixture;

(2) adding water into the mixture, mixing and stirring, adding the additive and the binder, and mixing and stirring uniformly to obtain the water-based paint.

By adopting the technical scheme, the addition amount of the portland cement, the machine-made sand, the river sand, the ceramsite and the fly ash is large, water is added for stirring after the silicate cement, the machine-made sand, the river sand, the ceramsite and the fly ash are uniformly mixed, the admixture and the binder are added after the mixture is uniformly stirred, so that the admixture, the binder and the mixture can be more uniformly mixed, the compatibility of the admixture, the binder and the mixture is better, and the durability and the strength of the green environment-friendly light aggregate concrete are better.

In summary, the present application has the following beneficial effects:

1. the application discloses green environment-friendly lightweight aggregate concrete is through adding additive and binder, and the additive has the hydrophobicity, and the binder can strengthen the control of the additive to the water absorption of lightweight aggregate concrete, and then controls the slump and the compressive strength of lightweight aggregate concrete to improve the durability and the intensity of green environment-friendly lightweight aggregate concrete.

2. The green environment-friendly light aggregate concrete adjusts the slump and the compressive strength of the light aggregate concrete by adjusting the proportional relation of each component in the admixture, and further improves the durability and the strength of the green environment-friendly light aggregate concrete.

Detailed Description

The present application will be described in further detail with reference to examples.

The method for processing the ceramsite package comprises the following steps: mixing and stirring the quick-hardening sulphoaluminate cement, the fly ash and the water uniformly according to the mass ratio of 80:15:15 to form cement paste, spraying the cement paste on the surface of the ceramsite, and forming a coating layer with the thickness of 2mm on the outer part of the ceramsite after the cement paste water is completely coagulated and hardened.

The green environment-friendly lightweight aggregate concrete is also added with 1-2 parts by weight of a film-forming aid, and the film-forming aid consists of dodecyl alcohol ester and ethylene glycol butyl ether according to the mass ratio of (1-3) to (2-4).

The green environment-friendly lightweight aggregate concrete is also added with 2-3 parts by weight of an expanding agent, wherein the expanding agent consists of calcined magnesia, natural dihydrate gypsum and alum according to the mass ratio of (2-3) to (2-4) to (3-5).

The green environment-friendly lightweight aggregate concrete is also added with 1-2 parts by weight of surfactant, and the surfactant consists of alkylphenol polyoxyethylene polyoxypropylene ether and polyoxyethylene sorbitan monooleate according to the mass ratio of (1-2) to (2-3).

Preferably, the portland cement has a cement fineness of 1.2%, a loss on ignition of 4.2%, and a strength grade of 42.5R.

Preferably, the apparent density of the machine-made sand is 2800kg/m³Bulk density of 1400kg/m³The mud content is 1%, the mud block content is 0.1%, and the water content is 1%.

Preferably, the river sand has an apparent density of 2600kg/m³Bulk density of 1600kg/m³The content of mud is 0.2%, the content of mud cake is 0.1%, the water content is 0.1%, and the firmness refers toThe mark is 99%.

Preferably, the thermal conductivity of the ceramsite is 0.03.

Preferably, the fly ash has a density of 1280kg/m³The heat conductivity coefficient is 0.3, the compressive strength is 0.5Mpa, and the sound absorption coefficient is 0.08.

Preferably, the polyethylene wax has a CAS number of 9002-88-4 and an active substance content of 100%.

Preferably, sodium alginate has a CAS number of 9005-38-3.

Preferably, the CAS number for hydroxypropyl methylcellulose is 9004-65-3.

Preferably, polyvinylpyrrolidone has a CAS number of 9003-39-8.

Preferably, the CAS number for the cellulose ether is 9004-58-4.

Preferably, ethylene glycol butyl ether has a CAS number of 111-76-2.

Preferably, the quick-hardening sulphoaluminate cement has the sulfur trioxide content of 10.5 percent, the magnesium oxide content of 2.0 percent, the specific surface area of 420 percent, the ignition loss of 0.2 percent and the strength grade of 42.5.

Preferably, the polyoxyethylene sorbitan monooleate has a CAS number of 9005-65-6.

Preferably, the natural dihydrate gypsum has an initial setting time of 12min, a final setting time of 12min, a breaking strength of 377MPa, an expansion coefficient of 12 and a standard consistency of 97%, and is produced by Zaozhuang Hui Meng building materials Co.

Preferably, 1, 2-bis (trimethylsiloxy) ethane has a CAS number of 7381-30-8.

Preferably, the content of the styrene-acrylic emulsion is more than or equal to 48 +/-2 percent, and the viscosity is 1000-4000S.

Preferably, alum has a CAS number of 7784-24-9, a 99% content, and a particle size of 100 mesh.

Preferably, the water content of the polycarboxylic acid water reducing agent is less than or equal to 3 percent, the bulk density is 500-550g/L, and the water reducing rate of the mortar is more than or equal to 24 percent.

TABLE 1 raw material specification, type and manufacturer

Examples

Example 1

The green environment-friendly lightweight aggregate concrete of the embodiment is composed of the following raw materials by weight: 220kg of Portland cement, 200kg of water, 180kg of machine-made sand, 130kg of river sand, 120kg of ceramsite, 50kg of fly ash, 5kg of additive and 5kg of binder, wherein the additive is composed of aqueous fluorocarbon resin emulsion and polycarboxylic acid water reducing agent according to the mass ratio of 6:5, and the binder is composed of styrene-acrylic emulsion and 1, 2-bis (trimethylsiloxy) ethane according to the mass ratio of 1: 1.

The preparation method of the green environment-friendly lightweight aggregate concrete comprises the following steps:

(1) mixing and stirring the Portland cement, the machine-made sand, the river sand, the ceramsite and the fly ash uniformly to obtain a mixture;

(2) adding water into the mixture, mixing and stirring, adding the additive and the binder, and mixing and stirring uniformly to obtain the water-based paint.

Example 2

The green environment-friendly lightweight aggregate concrete of the embodiment is composed of the following raw materials by weight: 250kg of Portland cement, 220kg of water, 200kg of machine-made sand, 150kg of river sand, 130kg of ceramsite, 70kg of fly ash, 6kg of additive, 8kg of binder, 2kg of film-forming aid, 3kg of expanding agent and 2kg of surfactant, wherein the additive is composed of aqueous fluorocarbon resin emulsion and polycarboxylic acid water reducer according to the mass ratio of 6:5, the binder is composed of styrene-acrylic emulsion and 1, 2-bis (trimethylsiloxy) ethane according to the mass ratio of 1:1, the film-forming aid is composed of dodecyl alcohol ester and ethylene glycol butyl ether according to the mass ratio of 2:3, the expanding agent is composed of calcined magnesium oxide, natural dihydrate gypsum and alum according to the mass ratio of 2:3:4, and the surfactant is composed of alkylphenol polyoxyethylene polyoxypropylene ether and polyoxyethylene sorbitan monooleate according to the mass ratio of 2: 3.

The preparation method of the green environment-friendly lightweight aggregate concrete comprises the following steps:

(1) mixing and stirring the Portland cement, the machine-made sand, the river sand, the ceramsite and the fly ash uniformly to obtain a mixture;

(2) adding water into the mixture, mixing and stirring, adding the admixture, the binder, the film-forming aid, the expanding agent and the surfactant, and mixing and stirring uniformly to obtain the water-based paint.

Examples 3 to 5

Examples 3 to 5 provide green environment-friendly lightweight aggregate concrete with different raw material component ratios, and the raw material component ratios of the green environment-friendly lightweight aggregate concrete corresponding to each example are shown in table 2, wherein the unit of the raw material ratio is kg.

Table 2 examples 2-5 green environmental protection type lightweight aggregate concrete component ratios

Raw materials	Example 2	Example 3	Example 4	Example 5
					Portland cement	250	260	270	280
Water (W)	220	230	240	250
					Machine-made sand	200	230	240	250
River sand	150	160	170	180
					Ceramic particle	130	135	140	150
Fly ash	70	80	90	100
					Additive agent	6	7	8	10
Binder	8	8	9	10
					Film forming aid	2	2	2	1
Expanding agent	3	3	3	2
					Surface active agent	2	2	2	1

The difference between the examples 3-5 and the example 2 lies in that the raw material proportions of the components of the green environment-friendly lightweight aggregate concrete are different, and the others are completely the same as the example 2.

The preparation method of the green environment-friendly lightweight aggregate concrete of the embodiments 3 to 5 is completely the same as that of the embodiment 2.

Example 6

The present embodiment is different from embodiment 3 in that: the admixture consists of aqueous fluorocarbon resin emulsion and sodium carbonate according to the mass ratio of 6:5, and the rest is completely the same as that of the example 3.

The preparation method of the green environment-friendly lightweight aggregate concrete of the embodiment is completely the same as that of the embodiment 3.

Example 7

The present embodiment is different from embodiment 3 in that: the admixture consists of aqueous fluorocarbon resin emulsion and sodium carbonate according to the mass ratio of 8:8, and the rest is completely the same as that of the embodiment 3.

The preparation method of the green environment-friendly lightweight aggregate concrete of the embodiment is completely the same as that of the embodiment 3.

Example 8

The present embodiment is different from embodiment 3 in that: the additive is composed of aqueous fluorocarbon resin emulsion, a polycarboxylic acid water reducing agent and sodium carbonate according to the mass ratio of 2:4:5, and the rest is completely the same as that in the embodiment 3.

The preparation method of the green environment-friendly lightweight aggregate concrete of the embodiment is completely the same as that of the embodiment 3.

Example 9

The present embodiment is different from embodiment 3 in that: the additive is composed of aqueous fluorocarbon resin emulsion, a polycarboxylic acid water reducing agent and sodium carbonate according to the mass ratio of 3:3:6, and the rest is completely the same as that in the embodiment 3.

The preparation method of the green environment-friendly lightweight aggregate concrete of the embodiment is completely the same as that of the embodiment 3.

Example 10

The present embodiment is different from embodiment 3 in that: the additive is composed of aqueous fluorocarbon resin emulsion, a polycarboxylic acid water reducing agent and sodium carbonate according to the mass ratio of 4:4:7, and the rest is completely the same as that in the embodiment 3.

The preparation method of the green environment-friendly lightweight aggregate concrete of the embodiment is completely the same as that of the embodiment 3.

Example 11

The present embodiment is different from embodiment 10 in that: the adhesive consists of styrene-acrylic emulsion, 1, 2-bis (trimethylsiloxy) ethane and sodium gluconate according to the mass ratio of 2:3:2, and the rest is completely the same as that in the embodiment 10.

The preparation method of the green environment-friendly lightweight aggregate concrete of the embodiment is completely the same as that of the embodiment 10.

Example 12

The difference between the embodiment and the embodiment 10 is that the adhesive is composed of styrene-acrylic emulsion, 1, 2-bis (trimethylsiloxy) ethane and sodium gluconate according to the mass ratio of 3:5:4, and the rest is completely the same as the embodiment 10.

The preparation method of the green environment-friendly lightweight aggregate concrete of the embodiment is completely the same as that of the embodiment 10.

Example 13

The green environment-friendly lightweight aggregate concrete of the embodiment is composed of the following raw materials by weight: 260kg of portland cement, 230kg of water, 230kg of machine-made sand, 160kg of river sand, 135kg of ceramsite, 80kg of fly ash, 7kg of additive, 8kg of binder, 2kg of film-forming aid, 3kg of expanding agent, 2kg of surfactant, 7kg of plasticizer and 2kg of reinforcing agent, wherein the plasticizer comprises sodium alginate and hydroxypropyl methyl cellulose according to the mass ratio of 1:1, the reinforcing agent is polyethylene wax, and the rest is completely the same as that in the embodiment 12.

The preparation method of the green environment-friendly lightweight aggregate concrete comprises the following steps:

(1) mixing and stirring the Portland cement, the machine-made sand, the river sand, the ceramsite, the fly ash, the plasticizer and the reinforcing agent uniformly to obtain a mixture;

(2) adding water into the mixture, mixing and stirring, adding the admixture, the binder, the film-forming aid, the expanding agent and the surfactant, and mixing and stirring uniformly to obtain the water-based paint.

Example 14

This embodiment is different from embodiment 13 in that: the amount of plasticizer added was 8kg, and the rest was exactly the same as in example 13.

The preparation method of the green environment-friendly lightweight aggregate concrete of the embodiment is completely the same as that of the embodiment 13.

Example 15

The present embodiment is different from embodiment 14 in that: the plasticizer is composed of sodium alginate, hydroxypropyl methylcellulose and polyvinylpyrrolidone in a mass ratio of 1:1:2, and the rest is completely the same as in example 13.

The preparation method of the green environment-friendly lightweight aggregate concrete of the embodiment is completely the same as that of the embodiment 14.

Example 16

The present embodiment is different from embodiment 14 in that: the plasticizer is composed of sodium alginate, hydroxypropyl methylcellulose and polyvinylpyrrolidone in a mass ratio of 2:2:3, and the rest is completely the same as that in example 14.

The preparation method of the green environment-friendly lightweight aggregate concrete of the embodiment is completely the same as that of the embodiment 14.

Example 17

This embodiment is different from embodiment 16 in that: the addition of the reinforcing agent was 3kg, and the reinforcing agent was fatty alcohol-polyoxyethylene ether, and the rest was the same as in example 16.

The preparation method of the green environment-friendly lightweight aggregate concrete of the embodiment is completely the same as that of the embodiment 16.

Example 18

This embodiment is different from embodiment 17 in that: the method for treating the ceramsite comprises the following steps: mixing and stirring the quick-hardening sulphoaluminate cement, the fly ash and the water uniformly according to the mass ratio of 80:15:15 to form cement paste, spraying the cement paste on the surface of the ceramsite, and forming a coating layer with the thickness of 2mm on the outer part of the ceramsite after the cement is completely condensed and hardened by precipitation. The rest was exactly the same as in example 17.

The preparation method of the green environment-friendly lightweight aggregate concrete of the embodiment is completely the same as that of the embodiment 17.

Comparative example

The green environment-friendly lightweight aggregate concrete of the comparative example is composed of the following raw materials by weight: 220kg of Portland cement, 200kg of water, 180kg of machine-made sand, 130kg of river sand, 120kg of ceramsite and 50kg of fly ash.

The preparation method of the green environment-friendly lightweight aggregate concrete of the comparative example comprises the following steps: mixing and stirring the Portland cement, the machine-made sand, the river sand, the ceramsite, the fly ash and the water uniformly to obtain the cement.

Performance test

Detection method

And (3) slump detection: the environment-friendly lightweight aggregate concrete obtained in the examples 1 to 18 and the comparative example was cured in a standard curing box with a relative humidity of more than 95% at 20 ℃, and the slump of the prepared environment-friendly lightweight aggregate concrete was measured at 0h and 2h according to the test method in the national standard GB/T50080-.

And (3) detecting the compressive strength: the green environment-friendly lightweight aggregate concrete obtained in examples 1 to 18 and the comparative example was tested for compressive strength in 7 days and 28 days according to the testing method in national standard GB/T50081-2019 "test method Standard for physical and mechanical Properties of concrete", and the testing results are shown in Table 3.

TABLE 3 Properties of Green and environmentally friendly lightweight aggregate concrete for examples 1-18 and comparative example

By combining the example 1 and the comparative example and combining the table 3, it can be seen that, compared with the comparative example, the additive and the binder are added into the environment-friendly lightweight aggregate concrete, and the water absorption of the environment-friendly lightweight aggregate concrete is reduced through the synergistic compounding effect of the additive, the binder and other raw materials, so that the slump of the environment-friendly lightweight aggregate concrete is reduced, and the compressive strength of the environment-friendly lightweight aggregate concrete is improved.

By combining examples 1 to 5 and table 3, it can be seen that the green lightweight aggregate concrete is greatly affected by changing the addition of each component in the green lightweight aggregate concrete, and the slump and the compressive strength of the green lightweight aggregate concrete are changed.

It can be seen from the combination of examples 5 to 12 and table 3 that the strength and slump of the green environment-friendly lightweight aggregate concrete are adjusted by changing the proportional relationship of the components of the admixture and the proportional relationship of the components of the binder, so that the strength and durability of the green environment-friendly lightweight aggregate concrete are enhanced.

In combination with examples 12 to 18 and table 3, it can be seen that the addition of the plasticizer and the reinforcing agent to the green lightweight aggregate concrete can further improve the compressive strength and the slump of the green lightweight aggregate concrete, thereby improving the durability and the strength of the green lightweight aggregate concrete.

The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.