CN113716893A

CN113716893A - Concrete waterproof compacting agent and preparation method thereof

Info

Publication number: CN113716893A
Application number: CN202111226695.1A
Authority: CN
Inventors: 张茹; 梁波; 江晓刚
Original assignee: Beijing Anji Hongtai Technology Co ltd
Current assignee: Beijing Anji Hongtai Technology Co ltd
Priority date: 2021-10-21
Filing date: 2021-10-21
Publication date: 2021-11-30

Abstract

The invention discloses a concrete waterproof compacting agent and a preparation method thereof, wherein the concrete waterproof compacting agent comprises 3-5% of glycerol; 10 to 12 percent of sodium thiosulfate; 1% -1.5% of sodium hydroxide; 2% -3.5% of amino triethanol; 1 to 1.5 percent of fatty alcohol-polyoxyethylene ether; 0.5-1% of mixture of defoaming agent and waterproofing agent; 8 to 10 percent of sodium methyl silicate; 8-10% of hydrated calcium sulphoaluminate, and the invention has the following beneficial effects: the invention uses sodium thiosulfate to replace an early strength agent, can effectively improve the early strength of concrete, can promote the hydration of cement, can improve the pore structure of a hydration product, enables the concrete to tend to be compact, can be used in an environment with lower air temperature, and improves the applicability of the concrete.

Description

Concrete waterproof compacting agent and preparation method thereof

Technical Field

The invention discloses a concrete waterproof compacting agent and a preparation method thereof, belonging to the technical field of building material additives.

Background

In the building industry, concrete is a common building material, but when the concrete in the current market is used, excessive adverse reactions are generated, and a better using effect cannot be achieved, so that a concrete waterproof compacting agent is needed.

However, the existing concrete has the disadvantages that the early strength of the concrete is not high enough when in use, and the concrete is easy to crack, and meanwhile, the existing concrete is not convenient to use in a low-temperature environment, so that the existing concrete has great limitation when in use.

Disclosure of Invention

The invention aims to solve the technical problem and provides a concrete waterproof compacting agent and a preparation method thereof, so that the problems are solved.

In order to achieve the purpose, the invention provides the following technical scheme: the concrete waterproof compacting agent comprises the following raw materials in parts by weight: 3% -5% of glycerin; 10 to 12 percent of sodium thiosulfate; 1% -1.5% of sodium hydroxide; 2% -3.5% of amino triethanol; 1 to 1.5 percent of fatty alcohol-polyoxyethylene ether; 0.5-1% of mixture of defoaming agent and waterproofing agent; 8 to 10 percent of sodium methyl silicate; 8 to 10 percent of hydrated calcium sulphoaluminate.

Preferably, all the raw materials are added into a mixer, and a certain amount of water is added for mixing, wherein the mixing and stirring time is 20min-30 min.

Preferably, the antifoaming agent is added into the waterproof agent, and the mixture is stirred for 10min to 15 min.

Preferably, the hydrated calcium sulfoaluminate is prepared by adding pnc into concrete and mixing by a mixer, wherein the mixing time is 10min-15min, and the pnc is a calcium sulfoaluminate concrete expanding agent.

Preferably, the method comprises the following preparation steps:

(1) putting the sodium thiosulfate into a heating tank according to the weight ratio, and heating the sodium thiosulfate to about 1200 ℃ until the sodium thiosulfate is safely melted;

(2) after the sodium thiosulfate is melted, adding the mixture of the fatty alcohol-polyoxyethylene ether, the sodium hydroxide, the aminotriethanol and the defoaming agent and the waterproofing agent according to a certain ratio, adding the raw materials into a mixer for mixing and stirring operation, wherein the stirring time is 20-30 min;

(3) heating the raw materials in the above steps to about 1500 ℃, and adding water when the raw materials are fully melted and the temperature is reduced to about 200 ℃;

(4) after the temperature is reduced to 80-95 ℃, adding glycerol, sodium methyl silicate and hydrated calcium sulphoaluminate, placing the mixture in a mixer for mixing and stirring for 30min, and then standing for about 5h for natural reaction;

(5) and (4) filtering the mixture obtained in the step, and packaging after the filtering is finished.

Compared with the prior art, the invention has the following beneficial effects:

the invention uses sodium thiosulfate to replace an early strength agent, can effectively improve the early strength of concrete, can promote the hydration of cement, can improve the pore structure of a hydration product, enables the concrete to tend to be compact, can be used in environments with lower ambient air temperature such as early winter and early spring, improves the application universality of the concrete, adds a defoaming agent into a waterproof agent, effectively reduces bubbles in a system, is beneficial to improving the heat conduction performance and the adhesive property of a product, utilizes the characteristic of the sodium thiosulfate to solve the problem of cracking caused by the early stage of the concrete, and achieves the purposes of enhancing the compactness of the concrete, improving the strength of the concrete, controlling the cracking, forming effect of hydrophobic pitted surface and water molecules and resisting water permeability.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The concrete waterproof compacting agent comprises 3-5% of glycerin; 10 to 12 percent of sodium thiosulfate; 1% -1.5% of sodium hydroxide; 2% -3.5% of amino triethanol; 1 to 1.5 percent of fatty alcohol-polyoxyethylene ether; 0.5-1% of mixture of defoaming agent and waterproofing agent; 8 to 10 percent of sodium methyl silicate; 8 to 10 percent of hydrated calcium sulphoaluminate.

The traditional early strength agent is replaced by sodium thiosulfate, so that the early strength of the concrete can be effectively improved, the hydration of cement can be promoted, the pore structure of a hydration product can be improved, the concrete tends to be dense, the concrete can be used in environments with low ambient air temperature such as early winter and early spring, and the application universality of the concrete is improved

Wherein, all the raw materials are added into a mixer, and a certain amount of water is added for mixing, and the mixing and stirring time is 20-30 min.

So as to achieve better mixing effect and avoid the occurrence of uneven mixing, thereby influencing the preparation effect.

Wherein, the antifoaming agent is added into the waterproofing agent and mixed and stirred for 10min to 15 min.

Through the addition of the defoaming agent, bubbles in a system are effectively reduced, the heat conduction performance and the bonding performance of a product are improved, the cracking problem caused in the early stage of concrete is solved by utilizing the characteristic of sodium thiosulfate, and the aims of enhancing the compactness of the concrete, improving the strength of the concrete, controlling cracking, forming a hydrophobic effect by a pitted surface and water molecules and preventing water and permeability are fulfilled.

The hydrated calcium sulfoaluminate is prepared by adding pnc into concrete and mixing by a mixer, wherein the mixing time is 10-15 min, and pnc is a calcium sulfoaluminate concrete expanding agent.

By adding hydrated calcium sulphoaluminate, the concrete can be expanded, and the structure of the concrete can be more compact. Can prevent the shrinkage cracking of the concrete, can obviously improve the early strength, the later strength and the impermeability of the concrete, and has better effects of early strength, low-temperature hardening, impermeability, frost damage resistance and the like on the concrete.

The preparation method comprises the following preparation steps:

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The concrete waterproof compacting agent comprises 3% -5% of glycerin; 10 to 12 percent of sodium thiosulfate; 1% -1.5% of sodium hydroxide; 2% -3.5% of amino triethanol; 1 to 1.5 percent of fatty alcohol-polyoxyethylene ether; 0.5-1% of mixture of defoaming agent and waterproofing agent; 8 to 10 percent of sodium methyl silicate; 8 to 10 percent of hydrated calcium sulphoaluminate.

2. The concrete waterproof compacting agent of claim 1, characterized in that: adding all the raw materials into a mixer, adding a certain amount of water, and mixing for 20-30 min.

3. The concrete waterproof compacting agent of claim 1, characterized in that: and adding a defoaming agent into the waterproof agent, and mixing and stirring for 10-15 min.

4. The concrete waterproof compacting agent of claim 1, characterized in that: the hydrated calcium sulfoaluminate is prepared by adding pnc into concrete and mixing by a mixer, wherein the mixing time is 10-15 min, and pnc is a calcium sulfoaluminate concrete expanding agent.

5. The concrete waterproof compacting agent and the preparation method thereof according to claim 1 are characterized in that: the preparation method comprises the following preparation steps: