Composite blending material for concrete and preparation method thereof

A composite admixture and concrete technology, applied in sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problem of difficult to adapt to the rapid growth of waste incineration fly ash, limited landfill disposal capacity, and high treatment costs. problems, to achieve the effect of being conducive to industrial production and popularization and application, good social and economic effects, and low cost

Inactive Publication Date: 2009-04-01
SHANGHAI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The harmless treatment of fly ash requires landfill after solidification/stabilization. However, the cost of arranging landfill is very high, and the disposal capacity

Method used

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  • Composite blending material for concrete and preparation method thereof
  • Composite blending material for concrete and preparation method thereof
  • Composite blending material for concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: First, take by weighing 13.5kg incineration fly ash, 40.5kg of pulverized fly ash, 67.5kg of slag micropowder and 13.5kg of pulverized natural mineral powder according to the prescribed ratio, and put the above-mentioned batching materials into the mixer , After fully stirring and mixing uniformly, the composite admixture for concrete can be obtained.

[0030] The above-mentioned composite admixtures were formulated into cement mortar and tested for strength.

[0031] Take cement 315kg, the compound admixture 135kg that above-mentioned embodiment makes, total weight 450kg; The ratio between the cement in the cement mortar and the substitute cement composite admixture is 70:30;

[0032] In addition, weigh 1350kg of sand, so that the ratio of glue to sand in the cement mortar sand is glue: sand = 1:3.

[0033] After being prepared into cement mortar, that is, mortar, it is made into a block sample for strength test.

[0034] The ratio of cement mortar and ...

Embodiment 2

[0037] Embodiment two: first take by weighing 20.25kg incineration fly ash, pulverized fly ash 54kg, slag micropowder 54kg and pulverized natural mineral powder 6.75kg by the proportioning of regulation, above-mentioned batching material is put into mixer, through After fully stirring and mixing uniformly, the composite admixture for concrete can be obtained.

[0038] The above-mentioned composite admixtures were formulated into cement mortar and tested for strength.

[0039] Take cement 315kg, the compound admixture 135kg that above-mentioned embodiment makes, total weight 450kg; The ratio between the cement in the cement mortar and the substitute cement composite admixture is 70:30;

[0040] In addition, weigh 1350kg of sand, so that the ratio of glue to sand in the cement mortar sand is glue: sand = 1:3.

[0041] After being prepared into cement mortar, that is, mortar, it is made into a block sample for strength test.

[0042] The ratio of cement mortar and strength test...

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Abstract

The invention relates to a composite admixture used in concrete that incineration fly ash of urban living garbage, fly ash, slag powder and natural mineral powder are taken as the main raw materials and a preparation method thereof, and pertains to the technical field of building material preparation technique. The composition and weight percent of the composite admixture in the invention are: incineration fly ash, 10-30%; fly ash, 20-40%; slag powder, 30-50%; and natural mineral powder, 5-15%. The composite admixture of the invention can replace 30-50% of use volume of the cement in concrete; the prepared concrete can not only improve the grade of the grains of the concrete system, but also improve fluidity, cohesiveness and moisture capacity of concrete mixture, and can improve slump constant, anti-sulfate performance and anti-carbonization performance of the concrete; and the durability performance of the concrete can also be improved. The waste such as incineration fly ash, industrial slag, and the like, can be recycled, thus being in favor of environmental protection, and saving cement, sources and energy.

Description

technical field [0001] The invention relates to a composite admixture for concrete whose main raw materials are fly ash from municipal solid waste incineration, fly ash, slag powder and natural mineral powder, and belongs to the technical field of building material preparation technology. Background technique [0002] With the acceleration of urban construction, the demand and consumption of concrete are also increasing, and concrete has become one of the most widely used man-made building materials in contemporary times. And in several kinds of raw materials of concrete, cement is an indispensable part. The use of industrial waste and solid waste to prepare composite admixtures for concrete to replace part of the cement in concrete is the need for solid waste recycling and circular economy, as well as the need for the scientific development of concrete materials. [0003] Municipal solid waste incineration fly ash and cement are relatively similar in main chemical composit...

Claims

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Application Information

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IPC IPC(8): C04B18/12C04B18/08
CPCC04B2111/2015C04B2103/0079C04B2111/22C04B2111/00017C04B2103/46C04B40/0039Y02W30/91C04B14/047C04B14/106C04B14/28C04B18/08C04B18/106C04B18/141C04B20/008C04B28/02
Inventor 杨佳俊陆文雄曹栋樑李小亮庄燕周海文
Owner SHANGHAI UNIV
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