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Concrete admixture and preparation method thereof

A technology of concrete admixture and water reducing agent, applied in the field of building materials, can solve the problems of unsatisfactory enhancement effect of concrete flexural strength and compressive strength, and achieve the effect of improving flexural strength and compressive strength

Active Publication Date: 2020-12-08
永康市伍佳混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The admixture is composed of various components and is a mixture. Through the action of each component, it can improve the performance of concrete and effectively reduce the impact of high mud content on the performance of concrete. However, it has no effect on the flexural strength of concrete. and the enhancement effect of compressive strength is unsatisfactory

Method used

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  • Concrete admixture and preparation method thereof

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preparation example Construction

[0027] For the preparation of silica-coated titanium dioxide, refer to the content disclosed in paragraph 0041 of CN104045266B.

[0028] The preparation method of described concrete admixture comprises the following steps:

[0029] (1) Get the flue deposit, grind the deposit into fine powder, put it into water 4 times the mass of the deposit, ultrasonicate for 30min, then filter and dry to obtain the pretreated flue deposit;

[0030] (2) Preparation of cellulose-grafted chitosan: add cellulose to distilled water, stir and disperse, pass through nitrogen for 30 minutes to remove oxygen, then add potassium persulfate solution under nitrogen protection, pretreat at 55 ° C for 2 hours, and then Add a 1wt% acetic acid solution of chitosan dissolved in a crosslinking agent, react at 50°C for 4h, wash with water to remove water-soluble impurities, then put the product into 1wt% acetic acid solution for extraction for 24h and continue to remove the homopolymer. Then wash with water a...

Embodiment 1

[0034]A concrete admixture, in parts by weight, comprising the following raw materials: 45 parts of polycarboxylate water reducer, 16 parts of cellulose grafted chitosan, 16 parts of pretreated flue deposits, vinyl triethylene 6 parts of oxysilane, 3 parts of polyvinylpyrrolidone, 2 parts of silicon carbide, 5 parts of hollow glass microspheres, 8 parts of silicon dioxide coated titanium dioxide, 5 parts of gelatin powder, 3 parts of calcium stearate, 3 parts of polyferric sulfate 6 parts, 6 parts of high alkali glass fiber.

[0035] For the preparation of silica-coated titanium dioxide, refer to the content disclosed in paragraph 0041 of CN104045266B.

[0036] The preparation method of described concrete admixture comprises the following steps:

[0037] (1) Get the flue deposit, grind the deposit into fine powder, put it into water 4 times the mass of the deposit, ultrasonicate for 30min, then filter and dry to obtain the pretreated flue deposit;

[0038] (2) Preparation of...

Embodiment 2

[0041] A concrete admixture, in parts by weight, comprising the following raw materials: 50 parts of polycarboxylate water reducer, 15 parts of cellulose grafted chitosan, 20 parts of pretreated flue deposits, vinyl triethylene 5 parts of oxysilane, 1 part of polyvinylpyrrolidone, 5 parts of silicon carbide, 3 parts of hollow glass microspheres, 10 parts of silicon dioxide coated titanium dioxide, 2 parts of gelatin powder, 1 part of calcium stearate, 1 part of polyferric sulfate parts, 10 parts of high alkali glass fiber.

[0042] For the preparation of silica-coated titanium dioxide, refer to the content disclosed in paragraph 0041 of CN104045266B.

[0043] The preparation method of described concrete admixture comprises the following steps:

[0044] (1) Get the flue deposit, grind the deposit into fine powder, put it into water 4 times the mass of the deposit, ultrasonicate for 30min, then filter and dry to obtain the pretreated flue deposit;

[0045] (2) Preparation of c...

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Abstract

The invention discloses a concrete additive and a preparation method thereof. The concrete additive is prepared from the following raw materials including polycarboxylate type water reducers, cellulose grafted chitosan, flue settlings, vinyltriethoxysilane, polyvinylpyrrolidone, silicon carbide, calcium stearate, polyferric sulfate and high alkali glass fiber, wherein the flue settlings refer to volatile substances settled in a glue during borosilicate glass production in a flame heating mode; the weight ratio of the vinyltriethoxysilane to the calcium stearate to the polyferric sulfate to thehigh alkali glass fiber is (1 to 3) to (0.6 to 1.4) to (0.6 to 1.4) to (1 to 3). The concrete additive is prepared through the steps of grinding, raw material modification, mixed split charging and the like. The concrete additive has the advantage that the breaking strength and the compressive strength of the concrete can be improved.

Description

【Technical field】 [0001] The invention belongs to the technical field of building materials, and in particular relates to a concrete admixture and a preparation method thereof. 【Background technique】 [0002] Concrete is the most widely used building material in modern times. It has the advantages of abundant raw materials, low price, simple process, high strength and good durability. Ready-mixed concrete is a kind of concrete, which refers to cement, aggregates, water, admixtures, mineral admixtures and other components mixed in according to a certain proportion in a mixing station after being measured and mixed, and sold. Concrete mixture transported to the place of use within the specified time by transport truck. Because of the high environmental impact of on-site construction, ready-mixed concrete has received increasing attention. However, after mixing concrete materials, chemical reactions will occur over time, which will have adverse effects on concrete fluidity, s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/42
CPCC04B40/0039C04B2201/50C04B2103/302C04B24/383C04B18/08C04B24/42C04B24/2652C04B14/324C04B14/22C04B14/06C04B14/305C04B24/14C04B24/085C04B22/149C04B14/44
Inventor 不公告发明人
Owner 永康市伍佳混凝土有限公司
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