Application of household garbage incineration fly ash composite admixture in cement stabilized macadam mixture

A technology for domestic waste incineration and cement-stabilized crushed stone, which is applied in the application field of domestic waste incineration fly ash composite admixture in cement-stabilized crushed stone mixture, which can solve the problem of wasting land resources, secondary pollution, endangering human health, etc. problems, to achieve the effect of reducing engineering costs, reducing consumption, and harmless disposal

Pending Publication Date: 2020-09-25
CHONGQING SANFENG ENVIRONMENTAL IND GRP +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It is estimated that in 2020, the annual production of incineration fly ash in the country will be about 10 million tons, and it is still growing year-on-year. Although the annual discharge of incineration fly ash is huge, the resource utilization rate is extremely low and is still in its infancy. land, waste land resources, and cause secondary pollution through various means, pollute water, soil and biological environment, and even endanger human health

Method used

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  • Application of household garbage incineration fly ash composite admixture in cement stabilized macadam mixture
  • Application of household garbage incineration fly ash composite admixture in cement stabilized macadam mixture
  • Application of household garbage incineration fly ash composite admixture in cement stabilized macadam mixture

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Experimental program
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Effect test

Embodiment 1

[0029]The composite admixture of domestic waste incineration fly ash is used as a stabilizing material to prepare a cement / incineration fly ash stabilized crushed stone mixture according to the following methods:

[0030] First, the water content does not exceed 5%, the strength activity index is 54.7%, and the solid content is 7kg of domestic waste incineration fly ash, 3kg of active mixed material (slag powder), 0.1kg of activator (sodium silicate) Carry out dry powder mixing, and form a composite admixture after mixing evenly;

[0031] Then, the composite admixture was added to the C-B-3 graded crushed stone ore containing 40.4kg of solid content and mixed evenly, then water was added to mix the material and the material was sealed for 12h;

[0032] Finally, cement with a solid content of 0.95kg (42.5 grade ordinary Portland cement) was added, and then water was added, and the mixture was uniformly mixed to form a cement / incineration fly ash stabilized crushed stone mixture...

Embodiment 2

[0035] The composite admixture of domestic waste incineration fly ash is used as a stabilizing material to prepare a cement / incineration fly ash stabilized crushed stone mixture according to the following methods:

[0036] First, the water content does not exceed 5%, the strength activity index is 54.7%, and the solid content is 7kg of domestic waste incineration fly ash, 6kg of active mixed material (fly ash), and 0.1kg of activator (alum). The dry powder is mixed, and the compound admixture is formed after mixing evenly;

[0037] Then, the composite admixture was added to the C-B-3 graded crushed stone ore containing 26.2kg of solid content and mixed evenly, and then water was added to mix and seal the material for 18h;

[0038] Finally, cement (42.5 grade ordinary Portland cement) with a solid content of 1.0 kg is added, and then water is added, and the mixture is uniformly mixed to form a cement / incineration fly ash stabilized crushed stone mixture.

[0039] The quality o...

Embodiment 3

[0041] The composite admixture of domestic waste incineration fly ash is used as a stabilizing material to prepare a cement / incineration fly ash stabilized crushed stone mixture according to the following methods:

[0042] First, dry powder of 4kg of domestic waste incineration fly ash with solid content of 4kg and 3kg of active mixed material (slag powder) and 0.3kg of activator (alum) with a water content of no more than 5% and a strength activity index of 54.7%. Mix, and form a composite admixture after mixing evenly;

[0043] Then, the composite admixture was added to the C-B-3 graded crushed stone ore containing 36.5kg of solid content and mixed evenly, and then water was added to mix and seal the material for 16h;

[0044] Finally, cement (42.5 grade ordinary Portland cement) with a solid content of 1.62 kg was added, and then water was added, and the mixture was uniformly mixed to form a cement / incineration fly ash stabilized crushed stone mixture.

[0045] The quality...

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Abstract

The invention relates to application of a household garbage incineration fly ash composite admixture in a cement stabilized macadam mixture, and belongs to the technical field of crossing of environmental engineering and highway engineering. According to the invention, the household garbage incineration fly ash is used as a stable material; the cement / incineration fly ash stabilized macadam mixture is mainly prepared by blending domestic waste incineration fly ash with an active mixed material and an excitant to form a composite admixture and then forming a composite cementing system togetherwith cement to stabilize graded macadam mineral aggregate; and the cement / incineration fly ash stabilized macadam mixture can be used in highway pavement base layers and subbase layers. According to the invention, component complementation and activity excitation effects in the composite admixture are utilized; the potential gelatinization activity of the incineration fly ash is released to the greatest extent to provide a high-activity cementing effect; meanwhile, heavy metal components contained in the incineration fly ash are stably solidified through the solidification effect of the composite cementing system, so that the cement / incineration fly ash stabilized macadam mixture with good performance is prepared, the recycling and harmless disposal target of the household garbage incineration fly ash is achieved, the use amount of cementing materials is reduced for highway engineering, and the engineering cost is reduced.

Description

technical field [0001] The invention belongs to the cross field of environmental engineering and highway engineering technology, and particularly relates to the application of a composite admixture of domestic waste incineration fly ash in a cement-stabilized crushed stone mixture. Background technique [0002] With the rapid development of society and economy, the amount of domestic waste generated and accumulated is increasing year by year. Waste incineration is one of the main methods to realize the harmlessness, reduction and recycling of domestic waste. Incineration fly ash is the catch of the flue gas purification system of the domestic waste incineration plant and the bottom ash settled at the bottom of the flue and chimney. The incineration fly ash contains dioxins, soluble heavy metals and high content of soluble salts. HW18 hazardous waste in the Hazardous Waste List. It is estimated that in 2020, the annual production of incineration fly ash in the country will ...

Claims

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Application Information

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IPC IPC(8): C04B28/04
CPCC04B28/04C04B2111/0075C04B2201/50C04B18/141C04B18/106C04B12/04C04B14/02C04B18/08C04B22/142
Inventor 曾贤琼司景忠雷钦平文永林李菁若蒋立新燕鸿鹏陈兆东李祖伟何胜李文旭程银钟成刘瑞全徐周聪吴崇禄蒋大春江勇
Owner CHONGQING SANFENG ENVIRONMENTAL IND GRP
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