阅读说明：本技术 一种混凝土防水添加剂 (Concrete waterproof additive ) 是由 曾炯和 于 2020-12-17 设计创作，主要内容包括：本发明涉及一种混凝土防水添加剂,包括按以下质量份数计的组分：硅粉5-10份,碳化硅粉10-20份,硅藻土10-20份,矿渣粉5-10份,增塑剂5-10份,交联剂1-5份,氧化钙5-20份,聚氨酯防水剂20-30份,成膜助剂10-20份,亚硝酸钠2-5份。本发明的混凝土防水添加剂,不仅能提升混凝土的防水能力,还能保证较好强度、耐蚀和耐磨等性能。(The invention relates to a concrete waterproof additive which comprises the following components in parts by mass: 5-10 parts of silicon powder, 10-20 parts of silicon carbide powder, 10-20 parts of diatomite, 5-10 parts of slag powder, 5-10 parts of plasticizer, 1-5 parts of cross-linking agent, 5-20 parts of calcium oxide, 20-30 parts of polyurethane waterproofing agent, 10-20 parts of film-forming assistant and 2-5 parts of sodium nitrite. The concrete waterproof additive disclosed by the invention not only can improve the waterproof capability of concrete, but also can ensure better strength, corrosion resistance, wear resistance and other properties.)

1. The concrete waterproof additive is characterized by comprising the following components in parts by mass:

2. the concrete waterproof additive is characterized by comprising the following components in parts by mass:

3. the concrete waterproofing additive according to claim 1 or 2, wherein the polyurethane waterproofing agent is prepared by the following method: preparing PM-200, TMN450, T-12 and ethyl acetate into a uniform solution, adding an initiator, and stirring to react to generate the polyurethane waterproofing agent.

4. The concrete waterproof additive as claimed in claim 3, wherein the mass ratio of PM-200, TMN450, T-12, initiator and ethyl acetate is 2:3:1:0.1: 100.

5. The concrete waterproof additive as claimed in claim 4, wherein the initiator is azo initiator, and the azo initiator is one or more of azobisisobutyronitrile, azobisisoheptonitrile, dimethyl azobisisobutyrate, azobisisobutyramidine hydrochloride, azobisisobutyrimidazoline hydrochloride and azobisisobutyronitrile formamide.

6. The concrete waterproof additive as claimed in claim 5, wherein the slag powder is an ultrafine slag powder having a specific surface area of 4500-7500cm²/g。

7. The concrete waterproof additive as claimed in claim 1, 2, 4, 5 or 6, wherein the cross-linking agent is any one or more of ethylenediamine, triethylenetetramine, dimethylaminopropylamine, diethylaminopropylamine, propylenediamine, glyoxal, trioxymethylene and fatty amine.

8. The concrete waterproofing additive according to claim 1 or 2 or 4 or 5 or 6, wherein the plasticizer is one or more selected from the group consisting of chlorinated paraffin, di (2-ethylhexyl) phthalate, dioctyl phthalate, di-n-octyl phthalate, butyl benzyl phthalate and epoxidized soybean oil.

9. The concrete waterproof additive as claimed in claim 1, 2, 4, 5 or 6, wherein the film forming aid is one or more selected from ethylene glycol monoethyl ether, propylene glycol butyl ether and propylene glycol methyl ether acetate.

10. The concrete waterproofing additive according to claim 1, 2, 4, 5 or 6, wherein the silicon carbide powder has a particle size number of #500, #600, #700, #800, #900, #1000 or # 1200.

Technical Field

The invention relates to the field of concrete additives, in particular to a concrete waterproof additive.

Background

Concrete buildings need to be contacted with water or soaked in water for a long time sometimes, and the concrete needs to have certain waterproof impermeability, for example, the concrete waterproof problem exists in publicly known railway tunnels, subway channels, deep mines and the like. Most of the existing concrete waterproof additives mainly use slag powder or aluminate and other materials, and are matched with some organic matters (amines, organic silicon, fatty acid, polyacrylic fiber, polyvinyl alcohol and the like) for use, although the impermeability and waterproof capability of concrete are improved to a certain extent, the sulfate or aluminate is a substance which is unfavorable for the performance of concrete, the strength, corrosion resistance, wear resistance and the like of the concrete are reduced, the compatibility of the organic matters and concrete slurry is poor, the requirement on stirring and mixing is high during production, and the production efficiency and the production cost are increased.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide the concrete waterproof additive which can improve the waterproof capability of concrete and ensure better strength, corrosion resistance, wear resistance and other properties.

The technical scheme adopted by the invention is as follows: the concrete waterproof additive comprises the following components in parts by weight:

preferably, the concrete waterproof additive comprises the following components in parts by mass:

preferably, the polyurethane waterproofing agent is prepared by the following method: preparing PM-200, TMN450, T-12 and ethyl acetate into a uniform solution, adding an initiator, and stirring to react to generate the polyurethane waterproofing agent.

Preferably, the mass ratio of the PM-200 to the TMN450 to the T-12 to the initiator to the ethyl acetate is 2:3:1:0.1: 100.

Preferably, the initiator is an azo initiator, and the azo initiator is one or more of azobisisobutyronitrile, azobisisoheptonitrile, dimethyl azobisisobutyrate, azobisisobutyramidine hydrochloride, azobisisobutyrimidazoline hydrochloride and azobisisobutyronitrile formamide. .

Preferably, the slag powder is ultrafine slag powder, and the specific surface area of the ultrafine slag powder is 4500-

Preferably, the cross-linking agent is any one or more of ethylenediamine, triethylenetetramine, dimethylaminopropylamine, diethylaminopropylamine, propylenediamine, glyoxal, trioxymethylene and fatty amine.

Preferably, the plasticizer is one or more of chlorinated paraffin, di (2-ethylhexyl) phthalate, dioctyl phthalate, di-n-octyl phthalate, butyl benzyl phthalate and epoxidized soybean oil.

Preferably, the film forming assistant is one or more selected from ethylene glycol monoethyl ether, propylene glycol butyl ether and propylene glycol methyl ether acetate.

Preferably, the particle size number of the silicon carbide powder is #500, #600, #700, #800, #900, #1000 or # 1200.

A preparation method of a concrete waterproof additive comprises the following steps:

A. weighing the raw materials in proportion;

B. preparation of a polyurethane waterproofing agent: preparing PM-200, TMN450, T-12 and ethyl acetate into a uniform solution, adding an initiator, stirring and reacting for 30min to generate a polyurethane waterproofing agent for later use;

C. putting the slag powder, the silicon powder and the silicon carbide powder into a ball mill for ball milling and dispersion for 1-2h, then adding sodium nitrite, calcium oxide and diatomite, and continuing ball milling and dispersion for 0.2-0.5 h;

D. grinding and dispersing, then pouring into stirring equipment, adding a film-forming aid, uniformly mixing, adding a plasticizer while stirring, finally adding a polyurethane waterproofing agent and a crosslinking agent, stirring at a high speed until the mixture is viscous, and drying at 105 ℃ to obtain the concrete waterproofing additive.

Preferably, the rotation speed of the high-speed stirring is 500-700 r/min.

Preferably, the ball-to-material ratio of the slag powder, the silicon powder and the silicon carbide powder thrown into the ball mill for ball milling dispersion is 11: 1, the rotating speed of the ball mill is 300-.

Compared with the prior art, the invention has the following advantages:

1. the polyurethane waterproof additive is added into concrete, so that the concrete and cement can be solidified to form a compact and tough film when the polyurethane waterproof additive is added into the concrete, the compact and tough film can be tightly adhered to the surface of concrete pores, and the hydrophobic property, the heat preservation property and the compression resistance of the concrete are greatly improved.

2. The concrete waterproof additive improves the curing speed and the mechanical property of cement by adding the film forming additive and the plasticizer, and can improve the mechanical property of cement by adding other fillers.

3. The concrete waterproof additive is formed by combining a plurality of specific inorganic substances, and each component can play a role in a synergistic manner, so that the waterproof performance of the additive is enhanced, and the strength, corrosion resistance, wear resistance and other performances of the concrete after the additive is used are improved.

4. The preparation method of the concrete waterproof additive is simple, the efficiency of producing the additive is high, and the obtained additive is stable in performance and easy to store.

The specific implementation mode is as follows:

in order to enhance the understanding of the present invention, the present invention will be described in further detail with reference to embodiments. The invention can be implemented by:

example 1

A preparation method of a concrete waterproof additive comprises the following steps:

A. weighing the raw materials in proportion;

B. preparation of a polyurethane waterproofing agent: preparing PM-200, TMN450, T-12 and ethyl acetate into a uniform solution, adding an initiator, stirring and reacting for 30min to generate a polyurethane waterproof agent for later use, wherein the mass ratio of the PM-200 to the TMN450 to the T-12 to the azobisisobutyronitrile to the ethyl acetate is 2:3:1:0.1: 100;

C. putting the 8 parts of slag powder, 8 parts of silicon powder and 15 parts of silicon carbide powder into a ball mill for ball milling and dispersion for 1.5h, then putting 3 parts of sodium nitrite, 10 parts of calcium oxide and 15 parts of diatomite, and continuing ball milling and dispersion for 0.4 h;

D. grinding and dispersing, pouring into stirring equipment, adding 15 parts of ethylene glycol monoethyl ether, uniformly mixing, adding 7 parts of chlorinated paraffin while stirring, finally adding 25 parts of polyurethane waterproofing agent and 1 part of ethylenediamine, 1 part of triethylenetetramine and 1 part of glyoxal, stirring at a high speed until the mixture is viscous, and drying at 105 ℃ to obtain the concrete waterproofing additive.

Example 2

A preparation method of a concrete waterproof additive comprises the following steps:

A. weighing the raw materials in proportion;

B. preparation of a polyurethane waterproofing agent: the same as example 1;

C. putting the 5 parts of slag powder, 5 parts of silicon powder and 12 parts of silicon carbide powder into a ball mill for ball milling and dispersion for 1 hour, then putting 2 parts of sodium nitrite, 5 parts of calcium oxide and 12 parts of diatomite, and continuing ball milling and dispersion for 0.2 hour;

D. grinding and dispersing, pouring into stirring equipment, adding 10 parts of propylene glycol butyl ether, uniformly mixing, adding 1 part of di (2-ethylhexyl) phthalate, 2 parts of di-n-octyl phthalate and 2 parts of butyl benzyl phthalate while stirring, finally adding 20 parts of polyurethane waterproofing agent and 1 part of dimethylamino propylamine, stirring at a high speed until the mixture is viscous, and drying at 105 ℃ to obtain the concrete waterproofing additive.

Example 3

A preparation method of a concrete waterproof additive comprises the following steps:

A. weighing the raw materials in proportion;

B. preparation of a polyurethane waterproofing agent: the same as example 1;

C. putting the 10 parts of slag powder, 10 parts of silicon powder and 20 parts of silicon carbide powder into a ball mill for ball milling and dispersion for 2 hours, then putting 5 parts of sodium nitrite, 18 parts of calcium oxide and 19 parts of diatomite, and continuing ball milling and dispersion for 0.5 hour;

D. grinding and dispersing, pouring into stirring equipment, adding 19 parts of propylene glycol monomethyl ether acetate, uniformly mixing, adding 10 parts of plasticizer while stirring, finally adding 30 parts of polyurethane waterproofing agent, 2 parts of diethylaminopropylamine and 3 parts of propane diamine, stirring at a high speed until the mixture is viscous, and drying at 105 ℃ to obtain the concrete waterproofing additive.

Finally, it should be noted that: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.