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Cementing material containing large amount of waste incineration fly ash and slag, and preparation method and application thereof

A technology of waste incineration fly ash and cementitious materials, applied in the field of building materials, can solve the problem of adding too much activator, etc., and achieve the effects of high utilization rate, avoid corrosion, and reduce the cost of raw materials

Inactive Publication Date: 2020-02-21
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing cementitious materials containing waste incineration fly ash have the following problems: it is necessary to add too many admixtures such as activators, early strength agents, etc., in order to have practical strength

Method used

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  • Cementing material containing large amount of waste incineration fly ash and slag, and preparation method and application thereof
  • Cementing material containing large amount of waste incineration fly ash and slag, and preparation method and application thereof
  • Cementing material containing large amount of waste incineration fly ash and slag, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 to 4

[0044] The method for preparing cementitious material with a large amount of waste incineration fly ash in 4 embodiments, which consists of the following components by mass percentage: 20-35% of waste incineration fly ash (respectively from 4 incineration power plants: Beijing Gaoantun, Beijing Lujiashan, a factory in Sichuan, a factory in Hubei), S95 slag powder 55-70%, desulfurization gypsum 10%.

[0045] Among them, the chemical composition of fly ash, S95 slag powder and desulfurized gypsum is shown in Table 1. The detection method is: X-ray fluorescence spectroscopic analysis (XRF), using XRF-1800 X-ray fluorescence spectrometer to measure secondary X-rays for material composition analysis.

[0046] Table 2 shows the heavy metal leaching concentrations of four types of waste incineration fly ash and S95 slag powder.

[0047] After pouring and curing to different ages, the compressive strength test and leaching toxicity test are carried out. The test methods are:

[0048]...

Embodiment 5 to 8

[0054] The method for preparing cementitious material with a large amount of garbage incineration fly ash of 4 embodiments, which is composed of the following components by mass percentage: 35-50% of garbage incineration fly ash (from 4 incineration power plants respectively: Beijing Gaoantun, Beijing Lujiashan, Sichuan, Hubei), S95 slag powder 40-55%, desulfurization gypsum 10%.

[0055] Among them, the chemical composition and source of waste incineration fly ash, S95 slag powder and desulfurized gypsum are the same as in Example 1.

[0056] After being poured and molded, it was maintained to different ages for compressive strength test and leaching toxicity test. The test method is the same as that of Example 1, and the test results are shown in Tables 3 and 4.

Embodiment 9 to 12

[0058] The method for preparing cementitious material with a large amount of waste incineration fly ash in 4 embodiments, which is composed of the following components by mass percentage: 50-60% of waste incineration fly ash (respectively from 4 incineration power plants: Beijing Gaoantun, Beijing Lujiashan, Sichuan, Hubei), S95 slag powder 30-40%, desulfurization gypsum 10%.

[0059] Among them, the chemical composition and source of waste incineration fly ash, S95 slag powder and desulfurized gypsum are the same as in Example 1.

[0060] After being poured and molded, it was maintained to different ages for compressive strength test and leaching toxicity test. The test method is the same as that of Example 1, and the test results are shown in Tables 3 and 4.

[0061] Table 2 Leach concentration of heavy metals in four kinds of waste incineration fly ash and slag (ug / L)

[0062]

[0063]

[0064] Table 3 compressive strength of clean pulp test block

[0065]

[006...

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Abstract

The invention relates to a cementing material containing a large amount of waste incineration fly ash and slag, and a preparation method and an application thereof. The cementing material containing the large amount of waste incineration fly ash and slag mainly comprises, by weight, 30-70 parts of S95 slag, 20-60 parts of the waste incineration fly ash and 7-13 parts of desulfurized gypsum. The large amount of waste incineration fly ash is added, and the cementing material has good industrially-applied compressive strength without adding additives such as an excitant and an early strength agent, so the cementing material can be used as a cementing material of concrete, can also be used as a mining cementing filling material, and is a good substitute of cement.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a cementitious material containing a large amount of waste incineration fly ash and slag, a preparation method and application thereof. Background technique [0002] my country's waste incineration industry has developed rapidly, and waste incineration projects have surged. According to the statistics of the E20 Research Institute, nearly 257 waste incineration power plants were built and operated nationwide in 2015, and the total amount of waste incineration in my country was 68.11 million tons. According to the "National Hazardous Waste List", Waste incineration fly ash (hereinafter referred to as fly ash) produced in the process of waste incineration is hazardous waste, accounting for 3% to 5% of the amount of waste incinerated. The amount of fly ash produced is 3.95 million tons. In 2016, nearly 300 waste incineration power plants have been built. By the end of 2020, the fly a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/28
CPCC04B7/243Y02P40/10
Inventor 倪文张思奇王珂李佳王一杰王莹史腾宇
Owner UNIV OF SCI & TECH BEIJING
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