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high mud content concrete

A technology for concrete and high mud content, applied in the field of concrete, can solve the problems of not being able to effectively reduce sand with high mud content, unable to meet various needs, single performance of admixtures, etc., achieving good economic and environmental benefits and good weather resistance. , The effect of improving strength and weather resistance

Active Publication Date: 2016-02-17
RIZHAO FEM NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the existing concrete admixtures can reduce mixing water, increase workability, control setting time, early strength, reinforcement, durability, dyeing, air-entrainment, etc., but the admixtures generally have single performance and cannot meet various needs. , and there is no admixture that can effectively reduce the impact of high mud content sand on the performance of concrete

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The formula of the concrete admixture of the present invention is: 45 parts of polycarboxylate water reducer, 16 parts of cellulose grafted chitosan, 16 parts of pretreated flue deposits, 6 parts of silane coupling agent, and 3 parts of polyvinylpyrrolidone , 2 parts of silicon carbide.

[0031] The preparation method is:

[0032] 1. Take the flue sediment, grind the sediment into fine powder, put it into water 4 times the mass of the sediment, ultrasonicate for 30 minutes, then filter and dry to obtain the pretreated flue sediment, which is ready for use.

[0033]2. Preparation of cellulose-grafted chitosan: add cellulose to distilled water, stir to disperse, pass nitrogen gas for 30 minutes to remove oxygen, then add potassium persulfate solution under nitrogen protection, pretreat at 55°C for 2 hours, then add A 1wt% acetic acid solution of chitosan dissolved with a crosslinking agent was reacted at 50°C for 4 hours. After the reaction, water-soluble impurities were...

Embodiment 2

[0036] The formula of the concrete admixture of the present invention is: 40 parts of polycarboxylate water reducer, 20 parts of cellulose grafted chitosan, 15 parts of pretreated flue deposits, 10 parts of silane coupling agent, and 1 part of polyvinylpyrrolidone , 5 parts of silicon carbide. The preparation method is the same as in Example 1.

Embodiment 3

[0038] The formula of the concrete admixture of the present invention is: 50 parts of polycarboxylate water reducer, 15 parts of cellulose grafted chitosan, 20 parts of pretreated flue deposits, 5 parts of silane coupling agent, and 5 parts of polyvinylpyrrolidone , 1 part of silicon carbide. The preparation method is the same as in Example 1.

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Abstract

The invention discloses a concrete with high mud content. The raw materials include: cement, sand, gravel, waste calcined material, admixture and water. The waste calcined material is prepared by the following method: waste concrete and waste bricks Mix according to the mass ratio of 10:3, crush and grind into powder less than 30mm, and set aside; put the powder in water, soak for 2-3 days, then take it out and dry it; put the dried powder at 1000-1100℃ Calcining at lower temperature for 4-5 hours, grinding and sieving after cooling, and taking calcined products with particle diameters of 0.15-3mm and 5-10mm respectively as waste calcined materials. The invention provides a kind of concrete with high mud content, which can use sand with high mud content as raw material, and the concrete with high mud content can still meet the building requirements through the introduction of admixture. In addition, the invention also recycles waste concrete and waste bricks, turns waste into wealth, reduces costs, and has good economic and environmental benefits.

Description

technical field [0001] The invention relates to a concrete composition, in particular to concrete with high mud content, and belongs to the technical field of concrete. 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, slump loss,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C04B18/10
CPCY02W30/91
Inventor 赵发源肖维录
Owner RIZHAO FEM NEW MATERIAL TECH
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