阅读说明：本技术 混凝土密封固化剂及其制备方法和施工方法 (Concrete sealing curing agent and preparation method and construction method thereof ) 是由 黄永华 于 2020-05-25 设计创作，主要内容包括：本发明涉及一种混凝土密封固化剂及其制备方法和施工方法,属于混凝土修复的技术领域,该密封固化剂包括A组分与B组分,A组分包括水性萜烯树脂溶胶和丙二醇二缩水甘油醚；B组分包括活性胶凝材料、膨胀珍珠岩10~15份；本申请将B组分涂抹在混凝土表面上,B组分与旧的混凝土地面的相容性良好,继续涂覆A组分,A组分是在现有的密封固化剂基础上加入水性萜烯树脂溶胶与丙二醇二缩水甘油醚,采用上述A组分与B组分对旧的混凝土进行修复,有助于促进该密封固化剂与旧的混凝土更好的结合为一体,填充了原本疏松的蜂窝结构形成紧密实体,有效隔绝水汽、油污等,提高旧的混凝土的密实性,因此本申请的密封固化剂同时兼具有密封与修复功能。(The invention relates to a concrete sealing curing agent, a preparation method and a construction method thereof, belonging to the technical field of concrete repair, wherein the sealing curing agent comprises a component A and a component B, wherein the component A comprises a water-based terpene resin sol and propylene glycol diglycidyl ether; the component B comprises an active cementing material and 10-15 parts of expanded perlite; this application is smeared the B component on the concrete surface, the compatibility of B component and old concrete ground is good, continue to coat A component, A component adds waterborne terpene resin sol and propylene glycol diglycidyl ether on current sealed curing agent basis, adopt above-mentioned A component and B component to restore old concrete, help promoting the combination that this sealed curing agent and old concrete are better as an organic whole, it forms closely entity to have filled original loose honeycomb, effectively isolated steam, greasy dirt etc., improve the closely knit nature of old concrete, consequently, the sealed curing agent of this application has simultaneously sealed and repair function.)

1. A concrete seal curing agent is characterized in that: comprises a component A and a component B;

the component A comprises the following components, by weight, 30-40 parts of silicate, 5-15 parts of a silane coupling agent, 10-12 parts of water-based terpene resin sol, 3-7 parts of propylene glycol diglycidyl ether and the balance of water, wherein the silicate is 100 parts by weight;

the component B comprises the following components in parts by weight: 30-35 parts of active cementing material, 40-50 parts of repair fine aggregate, 10-15 parts of expanded perlite, 0.5-1 part of early strength agent and 0.1-0.3 part of water reducing agent.

2. A concrete sealing curing agent according to claim 1, wherein: the silicate is selected from one of sodium silicate, potassium silicate and lithium silicate.

3. A concrete sealing curing agent according to claim 1, wherein: the silane coupling agent is compounded by glycidoxypropyl methyldimethoxysilane and dodecyl methyldimethoxysilane in a weight ratio of 1: 1.

4. The concrete sealing curing agent of claim 1, wherein the aqueous terpene resin sol is prepared by the following method: uniformly mixing the water-based terpene resin tackifying emulsion and the nano titanium dioxide sol in a weight ratio of 1: 1.

5. The concrete sealing curing agent of claim 4, wherein: the average particle size of the aqueous terpene resin sol is 15-30 nm.

6. The concrete sealing curing agent of claim 4, wherein: the viscosity of the water-based terpene resin tackifying emulsion is 1000-1500 cps.

7. A concrete sealing curing agent according to claim 1, wherein the preparation of the active cementitious material comprises the steps of:

(1) preparing materials: weighing 50-60 parts of concrete recycled powder, 10-30 parts of hydrated lime, 5-12 parts of magnesium oxide, 10-20 parts of lime soil and 100-150 parts of water according to parts by weight;

(2) uniformly mixing the concrete regeneration powder and the hydrated lime with the magnesium oxide and the lime soil to obtain a mixture;

(3) placing the mixture in a calcining furnace at the temperature of 600-630 ℃;

(4) and cooling the calcined mixture to 70-80 ℃, adding the mixture into water, and stirring and mixing to obtain the cementing material.

8. A method for preparing a concrete sealing curing agent according to any one of claims 1 to 7, comprising the steps of:

(1) preparing a component A: uniformly mixing silicate, a silane coupling agent, water-based terpene resin sol, propylene glycol diglycidyl ether and water for later use;

(2) preparing a component B: and uniformly mixing the active cementing material, the repair fine aggregate, the expanded perlite, the early strength agent and the water reducing agent for later use.

9. A construction method of a concrete sealing curing agent as claimed in any one of claims 1 to 7, characterized by comprising the steps of:

(1) uniformly coating the component B on the old concrete surface;

(2) and coating the component A on the component B, wherein the component A and the component B are used according to the weight ratio of 3-5: 1.

Technical Field

The invention relates to the technical field of concrete repair, in particular to a concrete sealing curing agent and a preparation method and a construction method thereof.

Background

The concrete sealing curing agent is a colorless, tasteless and nontoxic liquid sealant, can perform sufficient chemical reaction with chemical components in concrete and stone-made objects through effective permeation to form a high-strength and high-hardness curing floor, and a chemical reaction product can block concrete capillary pores from the inside, so that the concrete is converted into a firm and sealed whole, the strength and the density of the floor are effectively improved, dust is prevented from being generated, meanwhile, the ground is carefully polished, the ground can generate higher glossiness, and the use attractive effect is increased.

At present, popular concrete sealing curing agents on the market can be roughly divided into two types, one type is a product taking sodium silicate or potassium silicate as a main component, the strength and the wear resistance of concrete can be obviously improved, but the durability is poor, the efflorescence is easy to occur, and the later-stage terrace effect is influenced; the other kind of lithium-based salt products with lithium silicate as the main component are introduced from abroad, and most of the products have obvious sealing and hardening effects.

Chinese patent with application publication number CN 104150954A in the prior patent discloses a concrete sealing curing agent, which comprises 50-70 wt% of silicate; 10-30 wt% of a silane coupling agent; 1-3 wt% of nano titanium dioxide; the balance of water; after the concrete sealing curing agent provided by the application is coated on the surface of a concrete structure, silicate components in the concrete sealing curing agent can rapidly permeate into the concrete and react with free calcium to generate insoluble amorphous hydrated calcium silicate, so that the pores of the concrete structure are plugged, and the hardness of the concrete structure is improved.

However, the above-mentioned sealing curing agent and most of the sealing curing agents in the prior art are completely acted by penetration, so that when the sealing curing agent is applied to the old concrete floor, it has no repairing effect on the cracks of the surface layer of the original floor, and has limitation when being applied to the old concrete floor.

Disclosure of Invention

Aiming at the defects in the prior art, one of the purposes of the invention is to provide a concrete sealing curing agent which has the advantages of sealing and curing effects on old concrete, effective repairing effect and better usability; the second purpose of the invention is to provide a preparation method of the concrete sealing curing agent, which can realize the preparation of the sealing curing agent of the first purpose; the third purpose of the invention is to provide a construction method of the concrete sealing curing agent, which further explains the construction process of the sealing curing agent of the first purpose of the invention.

The above object of the present invention is achieved by the following technical solutions:

a concrete sealing curing agent comprises a component A and a component B;

the component A comprises the following components, by weight, 30-40 parts of silicate, 5-15 parts of a silane coupling agent, 10-12 parts of water-based terpene resin sol, 3-7 parts of propylene glycol diglycidyl ether and the balance of water, wherein the silicate is 100 parts by weight;

the component B comprises the following components in parts by weight: 30-35 parts of active cementing material, 40-50 parts of repair fine aggregate, 10-15 parts of expanded perlite, 0.5-1 part of early strength agent and 0.1-0.3 part of water reducing agent.

By adopting the technical scheme, the sealing curing agent comprises the component A and the component B, aiming at an old concrete floor, the component B is coated on the surface of concrete, the component B has good compatibility with the old concrete, and the component A is continuously coated, wherein the component A is prepared by adding water-based terpene resin sol and propylene glycol diglycidyl ether on the basis of the existing sealing curing agent, the propylene glycol diglycidyl ether belongs to an active diluent, has low viscosity, is favorable for the mixing and dissolving of the water-based terpene resin sol and silicate, and has stronger permeability and is favorable for the permeation of the component B; in addition, expanded perlite in the component B has a strong moisture absorption effect, and is beneficial to the component A to permeate into the component B, and the expanded perlite can also play a role of aggregate, so that the repair layer has high strength.

The present invention in a preferred example may be further configured to: the silicate is selected from one of sodium silicate, potassium silicate and lithium silicate.

By adopting the technical scheme, the sodium silicate is a soluble alkali metal silicate material, is an ore adhesive, has strong binding power and heat resistance and acid resistance, and can permeate into concrete gaps and pores to fill loose structures of concrete when the concrete is coated with the curing agent with the sodium silicate as a main component, so that the overall density and strength can be improved, and the overall compactness of the concrete can be improved; the potassium silicate is applied to the concrete curing agent, and has higher mechanical strength, high bonding force, smaller void ratio and higher impermeability and water resistance; lithium silicate is an active reaction type active chemical copolymer, can effectively permeate into a concrete terrace to continuously seal the internal pore structure of the concrete terrace, increases the hardness and the strength of the terrace, and can be firm like steel after frequent walking friction or polishing treatment, bright and durable.

The present invention in a preferred example may be further configured to: the silane coupling agent is compounded by glycidoxypropyl methyldimethoxysilane and dodecyl methyldimethoxysilane in a weight ratio of 1: 1.

By adopting the technical scheme, the glycidoxypropyl methyldimethoxysilane has excellent binding power and can improve the binding capacity with other components, and the dodecyl methyldimethoxysilane has a flexible long chain with hydrophobicity and reduces the surface energy for binding with other components, so that the silane coupling agent can be well bound with other components, and has good hydrophobic property, high surface gloss stability, good waterproofness, good weather resistance and good corrosion resistance.

The present invention in a preferred example may be further configured to: the preparation method of the aqueous terpene resin sol comprises the following steps: uniformly mixing the water-based terpene resin tackifying emulsion and the nano titanium dioxide sol in a weight ratio of 1: 1.

By adopting the technical scheme, the water-based terpene resin tackifying emulsion has excellent cohesiveness, the nano titanium dioxide sol has good dispersing and homogenizing effects, the compatibility of the water-based terpene resin and other components can be improved, and meanwhile, the nano titanium dioxide sol also has the characteristics of higher activity and easiness in addition, and is beneficial to preparing the water-based terpene resin sol with high permeability.

The present invention in a preferred example may be further configured to: the average particle size of the aqueous terpene resin sol is 15-30 nm.

By adopting the technical scheme, the average particle size of the aqueous terpene resin sol is limited to 15-30 nm, so that the penetration effect of the aqueous terpene resin sol to the component B is improved, the high dispersibility of the aqueous terpene resin sol can be ensured, and the uniform dispersion of the aqueous terpene resin sol and the rest components in the component A is facilitated.

The present invention in a preferred example may be further configured to: the viscosity of the water-based terpene resin tackifying emulsion is 1000-1500 cps.

By adopting the technical scheme, the viscosity of the water-based terpene resin tackifying emulsion is limited to be 1000-1500 cps, the fluidity is good, the water-based terpene resin tackifying emulsion is favorably and uniformly mixed with other components, the leveling property is good, and the penetration of the component A into the component B is promoted.

The invention in a preferred example may be further configured such that the preparation of the active gelling material comprises the steps of:

(1) preparing materials: weighing 50-60 parts of concrete recycled powder, 10-30 parts of hydrated lime, 5-12 parts of magnesium oxide, 10-20 parts of lime soil and 100-150 parts of water according to parts by weight;

(2) uniformly mixing the concrete regeneration powder and the hydrated lime with the magnesium oxide and the lime soil to obtain a mixture;

(3) placing the mixture in a calcining furnace at the temperature of 600-630 ℃;

(4) and cooling the calcined mixture to 70-80 ℃, adding the mixture into water, and stirring and mixing to obtain the cementing material.

By adopting the technical scheme, the concrete recycled powder, the hydrated lime, the magnesium oxide and the lime soil are mixed to prepare the effective components of the cementing material, the activity of the concrete recycled powder is improved by the blending proportion, and the active cementing material serving as a main component for repairing needs to have good compatibility with old concrete on one hand and easily react with the component A on the other hand, so that the sealing curing agent has better usability.

The second aim of the invention is realized by the following technical scheme:

a preparation method of a concrete sealing curing agent comprises the following steps:

(1) preparing a component A: uniformly mixing silicate, a silane coupling agent, water-based terpene resin sol, propylene glycol diglycidyl ether and water for later use;

(2) preparing a component B: and uniformly mixing the active cementing material, the repair fine aggregate, the expanded perlite, the early strength agent and the water reducing agent for later use.

By adopting the technical scheme, the component A and the component B are respectively prepared, the preparation process is simple, the mass production is suitable, the component A has stronger permeability, the component A and the component B generate synergistic action, and the old concrete can be promoted to be repaired, and the preparation process has simple process and strong practicability, and the third aim of the invention is realized by the following technical scheme:

a construction method of a concrete sealing curing agent comprises the following steps:

(1) uniformly coating the component B on the old concrete floor;

(2) and coating the component A on the component B, wherein the component A and the component B are used according to the weight ratio of 3-5: 1.

By adopting the technical scheme, the binding property of the component B and the old concrete is stronger, the component B is coated on the surface of the concrete in advance, the repairing of the crack of the concrete is facilitated, the component A and the component B are compounded according to the proportion for use, the permeability of the component A is facilitated to be utilized, and the repairing and sealing effects of the component B on the crack are further improved; the construction process is simple and convenient to operate.

In summary, the invention includes at least one of the following beneficial technical effects:

1. high strength and high hardness: the sealing curing agent disclosed by the application adopts the synergistic cooperation of the component A and the component B, so that the compactness of the concrete terrace is obviously improved, and the sealing curing agent has the advantage of enhancing and hardening;

2. excellent repairability: the sealing curing agent is coated on the surface of a concrete terrace, can repair the original cracks, and has good repairing performance compared with the sealing curing agent on the market;

3. the construction process is simple and the operation is convenient.

Detailed Description

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

The aqueous terpene resin tackifying emulsion is purchased from 8218 type aqueous terpene resin tackifying emulsion of Guangzhou Songbao chemical industry Co., Ltd; the nano titanium dioxide sol is purchased from anatase VK-TA33 product produced by New Material Ltd of Xuancheng crystal of Anhui; the concrete regeneration powder is prepared by crushing, separating and grinding waste concrete C35 (the water-cement ratio is 0.35) until the particle size is less than or equal to 0.080mm, calcining in a 600 ℃ muffle furnace, preserving heat for 5 hours and then rapidly cooling; the lime soil is obtained from a slaked lime soil sac modified calcium hydroxide product produced by Quzhou Guanghong Chengcai calcium industry Co., Ltd; the polycarboxylic acid high-efficiency water reducing agent is purchased from Jiangsu Subo New materials GmbH; preparing an aqueous terpene resin sol: uniformly mixing the water-based terpene resin tackifying emulsion and the nano titanium dioxide sol according to the weight ratio of 1:1 for later use.

The graded composition of the repair fine aggregate is shown in the following table:

preparation of raw materials example one:

an active cementing material is prepared by the following method:

(1) preparing materials: weighing 50 parts of concrete regenerated powder, 10 parts of hydrated lime, 5 parts of magnesium oxide, 10 parts of lime soil and 100 parts of water according to parts by weight;

(2) uniformly mixing the concrete regeneration powder and the hydrated lime with the magnesium oxide and the lime soil to obtain a mixture;

(3) placing the mixture in a calcining furnace at the temperature of 600 ℃;

(4) and cooling the calcined mixture to 75 ℃, adding the mixture into water, and stirring and mixing to obtain the cementing material.

Preparation example two of raw materials:

an active cementing material is prepared by the following method:

(1) preparing materials: weighing 52 parts of concrete regeneration powder, 15 parts of hydrated lime, 7 parts of magnesium oxide, 13 parts of lime soil and 112 parts of water according to parts by weight;

(2) uniformly mixing the concrete regeneration powder and the hydrated lime with the magnesium oxide and the lime soil to obtain a mixture;

(3) placing the mixture in a calcining furnace at the temperature of 600 ℃;

(4) and cooling the calcined mixture to 75 ℃, adding the mixture into water, and stirring and mixing to obtain the cementing material.

Preparation example three of raw materials:

an active cementing material is prepared by the following method:

(1) preparing materials: weighing 55 parts of concrete recycled powder, 20 parts of hydrated lime, 9 parts of magnesium oxide, 15 parts of lime soil and 128 parts of water according to parts by weight;

(2) uniformly mixing the concrete regeneration powder and the hydrated lime with the magnesium oxide and the lime soil to obtain a mixture;

(3) placing the mixture in a calcining furnace at the temperature of 600 ℃;

(4) and cooling the calcined mixture to 75 ℃, adding the mixture into water, and stirring and mixing to obtain the cementing material.

Preparation example four of raw materials:

an active cementing material is prepared by the following method:

(1) preparing materials: weighing 58 parts of concrete regenerated powder, 25 parts of hydrated lime, 10 parts of magnesium oxide, 17 parts of lime soil and 140 parts of water according to parts by weight;

(2) uniformly mixing the concrete regeneration powder and the hydrated lime with the magnesium oxide and the lime soil to obtain a mixture;

(3) placing the mixture in a calcining furnace at the temperature of 600 ℃;

(4) and cooling the calcined mixture to 75 ℃, adding the mixture into water, and stirring and mixing to obtain the cementing material.

Preparation example v of raw materials:

an active cementing material is prepared by the following method:

(1) preparing materials: weighing 60 parts of concrete regenerated powder, 30 parts of hydrated lime, 12 parts of magnesium oxide, 20 parts of lime soil and 150 parts of water according to parts by weight;

(2) uniformly mixing the concrete regeneration powder and the hydrated lime with the magnesium oxide and the lime soil to obtain a mixture;

(3) placing the mixture in a calcining furnace at the temperature of 600 ℃;

(4) and cooling the calcined mixture to 75 ℃, adding the mixture into water, and stirring and mixing to obtain the cementing material.