阅读说明：本技术 一种可喷涂防水防腐抗冲蚀高强砂浆及其使用方法 (Sprayable waterproof anticorrosion erosion-resistant high-strength mortar and use method thereof ) 是由 李益进 易金华 杨娟 袁航 于 2019-10-21 设计创作，主要内容包括：本发明提供了一种可喷涂防水防腐抗冲蚀高强砂浆及其使用方法,属于建筑材料技术领域。本发明提供的可喷涂防水防腐抗冲蚀高强砂浆包括如下质量份的组分：硅酸盐水泥熟料300～380份,微硅粉22～45份,超细矿渣粉20～50份,活性钢渣450～600份,分散剂0.2～0.6份,消泡剂0.5～1.2份,稳定增稠剂1～2份,羟乙基纤维素醚0.01～0.05份,防水胶粉5～20份,憎水剂1～3份。本发明提供的可喷涂防水防腐抗冲蚀高强砂浆具有高的抗渗性能、高的抗压强度和粘结强度,同时还具有优异的耐碱性、抗硫酸盐侵蚀性、憎水性能,且收缩率低,体积稳定性好。(The invention provides a sprayable waterproof anticorrosion erosion-resistant high-strength mortar and a use method thereof, belonging to the technical field of building materials. The sprayable waterproof anticorrosion erosion-resistant high-strength mortar provided by the invention comprises the following components in parts by mass: 300-380 parts of silicate cement clinker, 22-45 parts of silica fume, 20-50 parts of superfine slag powder, 450-600 parts of active steel slag, 0.2-0.6 part of dispersing agent, 0.5-1.2 parts of defoaming agent, 1-2 parts of stabilizing thickener, 0.01-0.05 part of hydroxyethyl cellulose ether, 5-20 parts of waterproof rubber powder and 1-3 parts of hydrophobic agent. The sprayable waterproof anticorrosion erosion-resistant high-strength mortar provided by the invention has high impermeability, high compressive strength and bonding strength, excellent alkali resistance, sulfate erosion resistance and hydrophobicity, low shrinkage and good volume stability.)

1. The sprayable waterproof anticorrosion erosion-resistant high-strength mortar is characterized by comprising the following components in parts by mass:

2. the sprayable waterproof anticorrosion erosion-resistant high-strength mortar according to claim 1, which comprises the following components in parts by mass:

3. the sprayable waterproof anticorrosion erosion-resistant high-strength mortar according to claim 1 or 2, wherein the portland cement clinker has a specific surface area of 600-800 m²/kg。

4. The sprayable waterproof anticorrosion erosion-resistant high-strength mortar according to claim 1 or 2, wherein the silica content of the silica fume is not less than 90 wt.%, and the specific surface area is 20000-28000 m²/kg。

5. The sprayable waterproof anticorrosion erosion-resistant high-strength mortar according to claim 1 or 2, wherein the specific surface area of the superfine slag powder is 500-650 m²/kg。

6. The sprayable waterproof anticorrosion erosion-resistant high-strength mortar according to claim 1 or 2, wherein the particle size of the active steel slag is 30-50 meshes, and the active steel slag is steel slag modified by silica sol.

7. The sprayable water-proof, anti-corrosive, anti-erosion high strength mortar of claim 1 or 2, wherein the defoamer is a polyether defoamer or a silicone defoamer.

8. The sprayable water-proof, corrosion-resistant and erosion-resistant high strength mortar of claim 1 or 2, wherein the stabilizing thickener is a complex silicate.

9. The use method of the sprayable waterproof anticorrosion erosion-resistant high-strength mortar according to any one of claims 1 to 8, characterized by comprising the following steps:

the sprayable waterproof anticorrosion erosion-resistant high-strength mortar is mixed with water and then sprayed.

10. The use method of the high-strength sprayable waterproof anticorrosion erosion-resistant mortar according to claim 9, wherein the mass ratio of the sprayable waterproof anticorrosion erosion-resistant high-strength mortar to water is 1: 0.1-0.2.

Technical Field

The invention relates to the technical field of building materials, in particular to sprayable waterproof anticorrosion erosion-resistant high-strength mortar and a using method thereof.

Background

Along with the improvement of the quality requirements of people on the building engineering, the water resistance of wall facades and the water resistance of wet base planes attract more and more attention of the building industry. On the other hand, the leakage problem of some concrete structures of long age has attracted much attention because the leakage directly affects the life of the building. The traditional waterproof materials mostly take flexible materials as main materials, such as waterproof coiled materials and waterproof coatings, the flexible waterproof materials are paved or sprayed on the surface of a base layer of a structure to form a waterproof isolation layer, the waterproof isolation layer is suitable for plane construction and parts with low water content of the base layer, and the waterproof isolation layer has the defects of poor compatibility with a matrix, poor aging resistance, high cost and the like; the rigid waterproof mortar has the problems of poor impermeability, large dry shrinkage, easy cracking and the like. The polymer mortar is a building material newly adopted in engineering, is prepared by stirring a gelled material and an organic polymer which can be dispersed in water, and the polymer in the polymer mortar permeates into pores and capillaries to form a film, thereby playing a sufficient role in hindering the erosion of external moisture. But the contradiction exists between the impermeability and the compressive strength of the polymer mortar, the impermeability can be improved by the high polymer content, but the compressive strength can be reduced; high compressive strength and low impervious nature. There are also adaptability problems between inorganic gelling systems and polymers, and the most compact gelling systems suffer from reduced barrier properties when certain polymers are added.

Disclosure of Invention

The invention aims to provide sprayable waterproof anticorrosion erosion-resistant high-strength mortar and a using method thereof.

In order to achieve the above object, the present invention provides the following technical solutions:

a sprayable waterproof anticorrosion erosion-resistant high-strength mortar comprises the following components in parts by mass:

preferably, the sprayable waterproof anticorrosion erosion-resistant high-strength mortar comprises the following components in parts by mass:

preferably, the specific surface area of the portland cement clinker is 600-800 m²/kg。

Preferably, the content of silicon dioxide in the micro silicon powder is more than or equal to 90 wt.%, and the specific surface area is 20000-28000 m²/kg。

Preferably, the specific surface area of the superfine slag powder is 500-650 m²/kg。

Preferably, the particle size of the active steel slag is 30-50 meshes, and the active steel slag is steel slag modified by silica sol.

Preferably, the defoaming agent is a polyether defoaming agent or a silicone defoaming agent.

Preferably, the stabilizing thickener is a complex silicate.

The invention also provides a using method of the sprayable waterproof anticorrosion erosion-resistant high-strength mortar in the technical scheme, which comprises the following steps:

the sprayable waterproof anticorrosion erosion-resistant high-strength mortar is mixed with water and then sprayed.

Preferably, the mass ratio of the sprayable waterproof anticorrosion erosion-resistant high-strength mortar to water is 1: 0.1-0.2.

The invention provides a sprayable waterproof anticorrosion erosion-resistant high-strength mortar, which comprises the following components in parts by mass: 300-380 parts of silicate cement clinker, 22-45 parts of silica fume, 20-50 parts of superfine slag powder, 450-600 parts of active steel slag, 0.2-0.6 part of dispersing agent, 0.5-1.2 parts of defoaming agent, 1-2 parts of stabilizing thickener, 0.01-0.05 part of hydroxyethyl cellulose ether, 5-20 parts of waterproof rubber powder and 1-3 parts of hydrophobic agent. The invention takes silicate cement clinker, silica fume, superfine slag powder and active steel slag as composite gelA system wherein portland cement clinker is the primary cementitious material; the superfine slag powder not only has excellent early activity and later activity, but also has small particle size, reduces the void ratio of a composite gelling system, plays a role in micro-aggregate effect, has high activity, has a composite effect with active steel slag, and greatly improves the compressive strength of the mortar; the micro silicon powder can increase the early strength and the later strength of the mortar, increase the compactness and improve the anti-permeability performance of the mortar, simultaneously, under the action of the micro silicon powder, the contents of a hydration product C-S-H gel phase and an AFt phase are increased, and Ca (OH)₂The content is reduced, specifically, after adding the micro silica fume, the content of C-S-H gel phase which plays the main role of gelation is increased due to the volcanic ash activity, and part of Ca (OH)₂The reaction is reduced, so that the hydration reaction process of cement clinker and the hydration reaction process of active steel slag are promoted, and the later strength is increased; the micro silicon powder as an excitant can improve the hydration reaction rate and accelerate the hydration reaction process of the active steel slag, so that more hydration products are generated, the compactness of the mortar is further enhanced, and the strength and the compactness of the composite gelling system can be greatly improved under the combined action of the active steel slag and the silicate cement clinker; the active minerals (such as tricalcium silicate and dicalcium silicate) in the active steel slag can carry out hydration reaction to generate a C-S-H gel phase, so that the later strength of the mortar can be increased, the compactness of the mortar is further improved, and the impermeability of the mortar is improved. Experimental results show that the sprayable waterproof anticorrosion erosion-resistant high-strength mortar provided by the invention can resist the permeation of pressure water of 0.8MPa for 24 hours, resist the permeation of pressure water of more than 1.8MPa for 28 days, has the 24-hour compressive strength of 45.6-47.2 MPa, the 24-hour flexural strength of 8.7-9.1 MPa, the 7-hour bonding strength of 1.4-1.5 MPa and the 28-hour bonding strength of 1.6-1.8 MPa, and also has excellent alkali resistance, frost resistance, low shrinkage and excellent waterproof performance.

In addition, the sprayable waterproof anticorrosion erosion-resistant high-strength mortar provided by the invention has the advantages of high impermeability grade, high compressive strength, excellent bonding strength and excellent corrosion resistance, is convenient to construct, can be sprayed, is low in cost, fully utilizes metallurgical waste residues (slag powder, micro silicon powder and steel slag), and has good economic benefit, social benefit and environmental benefit. The sprayable waterproof anticorrosion erosion-resistant high-strength mortar prepared by the invention can be used as waterproof materials for basements, pipe culverts, water pools and facades of outer walls.

Detailed Description

The invention provides a sprayable waterproof anticorrosion erosion-resistant high-strength mortar, which comprises the following components in parts by mass:

in the invention, the sprayable waterproof anticorrosion erosion-resistant high-strength mortar comprises 300-380 parts by mass of portland cement clinker, preferably 340-360 parts by mass of portland cement clinker, and more preferably 345-350 parts by mass of portland cement clinker; the specific surface area of the portland cement clinker is preferably 600-800 m²/kg, more preferably 650 to 750m²In terms of/kg. The source of the portland cement clinker is not particularly limited, and the portland cement clinker can be obtained by adopting a commercially available product, and when the specific surface area of the commercially available product does not meet the requirement, the commercially available portland cement clinker is preferably subjected to superfine grinding processing to obtain the portland cement clinker with the required specific surface area. In the invention, the portland cement clinker is used as a cementing material, plays a role in early strength cementing in mortar, and simultaneously generates hydration reaction to generate a hydration product which is acted together with the active steel slag to improve the compactness of the mortar.

In the invention, based on the mass parts of portland cement clinker, the sprayable waterproof anticorrosion erosion-resistant high-strength mortar comprises 22-45 parts of silica fume, preferably 25-40 parts of silica fume, and more preferably 30-35 parts of silica fume; the content of silicon dioxide in the micro silicon powder is preferably more than or equal to 90 wt.%, and the specific surface area is preferably 20000-28000 m²Per kg, more preferably 23000-26000 m²In terms of/kg. In the invention, the silica fume can increase the compactness and the later strength of the mortar, and simultaneously, as an excitant, the silica fume has higher pozzolan activity, can improve the hydration rate and accelerate the hydration reaction process of the active steel slag, thereby generating more hydration products and further enhancing the compactness of the mortarAnd the strength and the compactness of the composite cementing system can be greatly improved under the combined action of the cement and the portland cement clinker.

In the invention, on the basis of the mass parts of portland cement clinker, the sprayable waterproof anticorrosion erosion-resistant high-strength mortar comprises 20-50 parts of superfine slag powder, preferably 25-45 parts, and more preferably 30-40 parts; the preferable specific surface area of the superfine slag powder is 500-650 m²/kg, more preferably 550m²In terms of/kg. In the invention, the superfine slag powder can fill the gaps of the cementing material particles, participate in the volcanic ash reaction to generate hydration products, fill capillary pores and further compact and harden slurry. In addition, the strength of the cementing material doped with the fine slag powder is lower than that of standard cement in the age of 1-3 days, but the application of the superfine slag powder reduces the using amount of cement clinker, reduces the alkalinity of a cementing system, and slows down the early hydration reaction of the cementing system, thereby prolonging the operable time of the waterproof mortar; the later strength is improved to a certain extent compared with that of the reference cement. Moreover, the slag powder is industrial waste slag of blast furnace smelting pig iron, the consumption of natural resources is reduced by utilizing the slag powder, and the recycling of the resources is facilitated.

In the invention, based on the mass parts of portland cement clinker, the sprayable waterproof anticorrosion erosion-resistant high-strength mortar comprises 450-600 parts of active steel slag, preferably 450-550 parts of active steel slag, and more preferably 500-550 parts of active steel slag; the particle size of the active steel slag is preferably 30-50 meshes; the active steel slag is preferably steel slag modified by silica sol; the preparation method of the active steel slag preferably comprises the following steps: mixing the steel slag and the silica sol, and then sequentially crushing and sieving to obtain active steel slag; the mass ratio of the steel slag to the silica sol is preferably 100: 0.15-0.25, more preferably 100:0.2, and the particle size of the steel slag is 10-80 meshes. In the invention, the active steel slag is an aggregate with potential hydraulic activity, active minerals (such as tricalcium silicate and dicalcium silicate) can partially undergo hydration reaction to generate a small amount of hydration products, so that the compactness of mortar is further increased, and the hydration products generated by cement clinker and the hydration products generated by the active steel slag can jointly act to improve the strength of a composite gelling system. In addition, the steel slag is industrial waste slag, so that a large amount of natural resources can be saved by using the steel slag, and the steel slag has the advantages of low price, energy conservation and environmental protection.

In the invention, based on the mass parts of portland cement clinker, the sprayable waterproof anticorrosion erosion-resistant high-strength mortar comprises 0.2-0.6 part of dispersant, preferably 0.3-0.5 part, more preferably 0.4-0.5 part; the dispersing agent is preferably a polycarboxylic acid high-efficiency water reducing agent. In the invention, the dispersant can reduce water consumption, improve the strength of a system, reduce the cement consumption, and simultaneously play roles in dispersing, homogenizing and reducing water by the polycarboxylic acid high-efficiency water reducing agent.

In the invention, based on the mass parts of portland cement clinker, the sprayable waterproof anticorrosion erosion-resistant high-strength mortar comprises 0.5-1.2 parts of defoaming agent, preferably 0.6-1 part, and more preferably 0.7-0.9 part; the defoaming agent is preferably a polyether defoaming agent or a silicone defoaming agent. In the invention, the defoaming agent can reduce bubbles in the system and increase the compactness of the system.

In the invention, based on the mass parts of portland cement clinker, the sprayable waterproof anticorrosion erosion-resistant high-strength mortar comprises 1-2 parts of stable thickening agent, preferably 1.5-2 parts; the stabilizing thickener is preferably a complex silicate, more preferably magnesium aluminum silicate. In the invention, the composite silicate has good rheological property and thixotropy, plays a role of a stabilizer and a thickener in a system, greatly improves the spraying performance of the mortar due to the addition of the composite silicate, reduces the rebound in the mortar spraying process, saves materials and improves the working efficiency.

In the invention, based on the mass parts of portland cement clinker, the sprayable waterproof anticorrosion erosion-resistant high-strength mortar comprises 0.01-0.05 part of hydroxyethyl cellulose ether, preferably 0.02-0.04 part of hydroxyethyl cellulose ether, and more preferably 0.03-0.04 part of hydroxyethyl cellulose ether; the viscosity of the hydroxyethyl cellulose ether is 30000-60000 mpa.s at a viscometer of an aqueous solution with a mass concentration of 2% at 20 ℃. In the invention, the hydroxyethyl cellulose ether is used for improving the working performance of the mortar and improving the bonding performance of the mortar.

According to the invention, based on the mass parts of portland cement clinker, the sprayable waterproof, anticorrosive and erosion-resistant high-strength mortar comprises 5-20 parts of waterproof rubber powder, preferably 8-15 parts of waterproof rubber powder, and more preferably 10-15 parts of waterproof rubber powder; the waterproof rubber powder is preferably styrene-acrylic copolymer latex powder, and more preferably German Wake styrene-acrylic rubber powder 4015N or German Wake styrene-acrylic rubber powder 4023N. According to the invention, the waterproof rubber powder fills the pores of the cementing system in the mortar and permeates into the capillary pores to form a film in the pores and the capillary pores, so that the cementing material and the waterproof rubber powder are integrated into an organic whole, the bonding performance of the mortar and a matrix is improved, the bonding strength is improved, the toughness of the mortar is improved, the folding ratio of the mortar is increased, and the obtained composite cementing slurry has good construction performance and durability.

In the invention, based on the mass parts of portland cement clinker, the sprayable waterproof anticorrosion erosion-resistant high-strength mortar comprises 1-3 parts of a water repellent, preferably 1.5-2.5 parts, and more preferably 1.5-2 parts; the water repellent is preferably organosilicon hydrophobic powder, and more preferably Texaco P750 organosilicon hydrophobic powder. In the invention, the water repellent can improve the water repellent effect of the mortar and further improve the waterproof performance of the mortar.

The preparation method of the sprayable waterproof anticorrosion erosion-resistant high-strength mortar is not particularly limited, and a product which is uniformly mixed can be obtained; the mechanical stirring is preferably carried out in a horizontal stirrer, the rotating speed of the stirring is preferably 80-120 r/min, and the time is preferably 3-5 min.

The invention also provides a using method of the sprayable waterproof anticorrosion erosion-resistant high-strength mortar in the technical scheme, which comprises the following steps:

the sprayable waterproof anticorrosion erosion-resistant high-strength mortar is mixed with water for spraying.

In the invention, the mass ratio of the sprayable waterproof anticorrosion erosion-resistant high-strength mortar to water is preferably 1: 0.1-0.2, and more preferably 1: 0.125-0.145.

In the invention, the mode of mixing the sprayable waterproof anticorrosion erosion-resistant high-strength mortar with water is preferably stirring, the rotating speed and the stirring time are not specially limited, and the uniformly mixed materials can be obtained.

The following will explain in detail a sprayable waterproof anticorrosion erosion-resistant high-strength mortar and a method for using the same provided by the present invention with reference to the examples, but they should not be construed as limiting the scope of the present invention.