阅读说明：本技术 一种抗冻防收缩复合材料混凝土 (Anti-freezing and anti-shrinkage composite concrete ) 是由 曾碧波 叶世友 邱子强 于 2020-05-25 设计创作，主要内容包括：本发明公开了一种抗冻防收缩复合材料混凝土,由胶凝材料、集料以及水按一定比例配合,经搅拌、成型、养护而得；胶凝材料由下述重量组份的原料配制而成：粉煤灰550份～1100份；硅粉320份～380份；矿渣220份～280份；淀粉150份～200份；丙烯酸58份～76份；丙烯酰胺68份～89份；顺丁烯二酸105份～125份；水泥250份～300份；其中,淀粉、丙烯酸、丙烯酰胺以及顺丁烯二酸干接枝共聚。该抗冻防收缩复合材料混凝土,活性粉末掺料可以取代部分水泥的使用,减少水泥的使用量,其中大量的活性成分在根源上可以降低对水分的吸收,从而降低混凝土材料的含水量,增强抗冻性能。(The invention discloses antifreeze anti-shrinkage composite material concrete which is prepared by mixing a cementing material, aggregate and water according to a certain proportion, stirring, molding and maintaining; the cementing material is prepared from the following raw materials in parts by weight: 550-1100 parts of fly ash; 320-380 parts of silicon powder; 220-280 parts of slag; 150-200 parts of starch; 58-76 parts of acrylic acid; 68-89 parts of acrylamide; 105-125 parts of maleic acid; 250-300 parts of cement; wherein, starch, acrylic acid, acrylamide and maleic acid are subjected to dry grafting copolymerization. According to the antifreeze shrinkage-resistant composite material concrete, the active powder admixture can replace part of cement, the using amount of the cement is reduced, and a large amount of active ingredients can reduce the absorption of water fundamentally, so that the water content of the concrete material is reduced, and the antifreeze performance is enhanced.)

1. The antifreezing and anti-shrinkage composite material concrete is prepared by mixing a cementing material, an aggregate and water according to a certain proportion, and stirring, molding and maintaining; the method is characterized in that: the cementing material is prepared from the following raw materials in parts by weight:

550 parts to 1100 parts of fly ash,

320 to 380 parts of silicon powder,

220 to 280 portions of slag,

150 to 200 portions of starch, and the like,

58 to 76 portions of acrylic acid,

68 to 89 portions of acrylamide,

105 to 125 parts of maleic acid,

250 to 300 portions of cement, namely cement,

wherein, starch, acrylic acid, acrylamide and maleic acid are subjected to dry grafting copolymerization;

the aggregate is prepared from the following raw materials in parts by weight:

450 to 800 portions of the crushed stone,

150-200 parts of pebbles;

the weight portion of the water is 250 to 350 portions.

2. The antifreeze and shrinkage-resistant composite concrete according to claim 1, wherein: the cementing material comprises the following components in parts by weight: 850-1000 parts of fly ash; 350-370 parts of silicon powder; 260-270 parts of slag; 180-190 parts of starch; 70-72 parts of acrylic acid; 75-85 parts of acrylamide; 110 to 119 parts of maleic acid; 280-290 parts of cement; the aggregate comprises the following components in parts by weight: 700-750 parts of crushed stone; 180-190 parts of pebbles; the weight portion of the water is 280 to 320 portions.

3. The antifreeze and shrinkage-resistant composite concrete according to claim 1, wherein: the gelled material is also added with acrylate and vinyl acetate copolymerization hydrolysate, wherein the acrylate accounts for 73-87 parts by weight, and the vinyl acetate accounts for 82-95 parts by weight.

4. The antifreeze and shrinkage-resistant composite concrete according to claim 3, wherein: the weight portion of the acrylic ester is 80-85 portions, and the weight portion of the vinyl acetate is 86-92 portions.

5. The antifreeze and shrinkage-resistant composite concrete according to claim 3, wherein: 70-100 parts of alginic acid is also added into the cementing material.

6. The antifreeze and shrinkage-resistant composite concrete according to claim 5, wherein: 85-95 parts of alginic acid is also added into the cementing material.

7. The antifreeze and shrinkage-resistant composite concrete according to claim 5, wherein: 56-78 parts of cross-linked polyacrylate is also added into the cementing material.

8. The antifreeze and shrinkage-resistant composite concrete according to claim 7, wherein: 65-70 parts of cross-linked polyacrylate is also added into the cementing material.

Technical Field

The invention relates to the technical field of concrete, in particular to antifreeze and anti-shrinkage composite material concrete.

Background

Frost resistance is a very important property of concrete, which is generally expressed in terms of frost resistance rating. The anti-freezing grade is determined by adopting the maximum freezing-thawing cycle times which can be borne by test blocks with age of 28d after the test blocks are saturated with water and the compression strength is reduced by no more than 25 percent and the mass loss is no more than 5 percent. According to the concrete quality control standard GB 50164-92, the frost resistance grade of the concrete is divided into nine grades, and according to the hydraulic concrete structure design specification SL191-2008, the frost resistance grade of the concrete is divided into seven grades. In concrete, cement, which is generally used as a cementing material, has a large specific gravity, even if used in a large amount, and in addition, imposes a higher demand on the formed concrete, and the water content thereof needs to be low enough to ensure the frost resistance of the formed concrete.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: in order to solve the problems existing in the background technology, the antifreeze and anti-shrinkage composite material concrete is provided, the active powder admixture can replace part of cement, the using amount of the cement is reduced, and a large amount of active ingredients can reduce the absorption of water fundamentally, so that the water content of the concrete material is reduced, and the antifreeze performance is enhanced.

The technical scheme adopted by the invention for solving the technical problems is as follows: the antifreezing and anti-shrinkage composite material concrete is prepared by mixing a cementing material, an aggregate and water according to a certain proportion, and stirring, molding and maintaining; the cementing material is prepared from the following raw materials in parts by weight:

550 parts to 1100 parts of fly ash,

320 to 380 parts of silicon powder,

220 to 280 portions of slag,

150 to 200 portions of starch, and the like,

58 to 76 portions of acrylic acid,

68 to 89 portions of acrylamide,

105 to 125 parts of maleic acid,

250 to 300 portions of cement, namely cement,

wherein, starch, acrylic acid, acrylamide and maleic acid are subjected to dry grafting copolymerization;

the aggregate is prepared from the following raw materials in parts by weight:

450 to 800 portions of the crushed stone,

150-200 parts of pebbles;

the weight portion of the water is 250 to 350 portions.

More specifically, in the above technical scheme, the cementitious material comprises the following components in parts by weight: 850-1000 parts of fly ash; 350-370 parts of silicon powder; 260-270 parts of slag; 180-190 parts of starch; 70-72 parts of acrylic acid; 75-85 parts of acrylamide; 110 to 119 parts of maleic acid; 280-290 parts of cement; the aggregate comprises the following components in parts by weight: 700-750 parts of crushed stone; 180-190 parts of pebbles; the weight portion of the water is 280 to 320 portions.

More specifically, in the above technical scheme, the gelled material is further added with a copolymer hydrolysate of acrylic ester and vinyl acetate, wherein the weight portion of the acrylic ester is 73-87 parts, and the weight portion of the vinyl acetate is 82-95 parts.

More specifically, in the above technical scheme, the weight component of the acrylate is 80-85 parts, and the weight component of the vinyl acetate is 86-92 parts.

More specifically, in the technical scheme, 70-100 parts of alginic acid is also added into the cementing material.

More specifically, in the technical scheme, 85-95 parts of alginic acid is also added into the cementing material.

More specifically, in the above technical scheme, 56 to 78 parts of cross-linked polyacrylate is also added to the gelled material.

More specifically, in the above technical scheme, 65 to 70 parts of cross-linked polyacrylate is also added to the gelled material.

The invention has the beneficial effects that: according to the antifreeze and anti-shrinkage composite material concrete provided by the invention, the active powder admixture can replace part of cement, the use amount of the cement is reduced, and a large amount of active ingredients can radically reduce the absorption of water, so that the water content of the concrete material is reduced, the antifreeze performance is enhanced, and the antifreeze and anti-shrinkage composite material concrete can be widely applied to civil engineering.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more apparent, the present invention is further described in detail below with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.