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Cementitious material containing waste incineration fly ash and steel slag slag, preparation method and application

A waste incineration fly ash and cementitious material technology, which is applied in the field of building materials, can solve the problems of adding too much activator, etc., and achieve the effects of improving recycling rate, high compressive strength, leaching safety, and high safety

Active Publication Date: 2021-04-27
北科蕴宏环保科技(北京)有限公司
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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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  • Cementitious material containing waste incineration fly ash and steel slag slag, preparation method and application
  • Cementitious material containing waste incineration fly ash and steel slag slag, preparation method and application
  • Cementitious material containing waste incineration fly ash and steel slag slag, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] A high-aluminum steel slag-slag-fly ash-desulfurized gypsum solidified heavy metal cementitious material of this embodiment is mainly composed of the following components in mass percentage: 40% of S95 slag powder, 20% of high-alumina steel slag powder, and 30% of waste incineration fly ash , Desulfurization gypsum 10%.

[0057] Among them, the chemical compositions of S95 slag powder, fly ash, high-alumina steel slag and desulfurized gypsum are shown in Table 1.

[0058] After pouring and molding, it was maintained to different ages for leaching toxicity testing. The test method was the same as that of Comparative Example 1. The test results are shown in Table 2.

Embodiment 2

[0060] The preparation method of a high-alumina steel slag-slag-fly ash-desulfurized gypsum solidified heavy metal cementitious material in this embodiment mainly consists of the following components in mass percentage: S95 slag powder 20%, high-alumina steel slag powder 40%, garbage Incineration fly ash 30%, desulfurization gypsum 10%.

[0061] Among them, the chemical compositions of S95 slag powder, fly ash, high-alumina steel slag and desulfurized gypsum are shown in Table 1.

[0062] After pouring and molding, it was maintained to different ages for leaching toxicity testing. The test method was the same as that of Comparative Example 1. The test results are shown in Table 2.

Embodiment 3

[0064] The preparation method of a high-alumina steel slag-slag-fly ash-desulfurized gypsum solidified heavy metal cementitious material in this embodiment is mainly composed of the following components in terms of mass percentages: high-alumina steel slag powder 60%, waste incineration fly ash 30% %, desulfurized gypsum 10%.

[0065] Among them, the chemical compositions of fly ash, high aluminum steel slag and desulfurized gypsum are shown in Table 1.

[0066] After pouring and molding, it was maintained to different ages for leaching toxicity testing. The test method was the same as that of Comparative Example 1. The test results are shown in Table 2.

[0067] Table 1 Raw material chemical composition % analysis

[0068]

[0069]

[0070] Table 2 The leaching concentration of heavy metals in clean slurry test blocks of different ages (μg / L)

[0071]

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Abstract

The invention relates to a cementitious material containing waste incineration fly ash and steel slag slag, a preparation method and application. A cementitious material containing waste incineration fly ash and steel slag slag, mainly composed of the following components: by weight, 0-60 parts of S95 slag, 0-60 parts of high-aluminum steel slag, 20-40 parts of waste incineration fly ash, 7 to 13 parts of desulfurized gypsum. The ratio of cementitious material to aggregate in concrete or filling material is 1:4‑1:8, and the concentration is 77%. The invention is mixed with a large amount of waste incineration fly ash, and can show good compressive strength for industrial application without adding additives such as activator, early strength agent, etc., and can be used as a cementing material for concrete and as Mining filling material is a good substitute for cement.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a cementitious material containing waste incineration fly ash and steel slag slag, a preparation method and an application. 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 reaches 3.95 million tons. In 2016, nearly 300 waste incineration power plants have been built. By the end of 2020, the fly ash will...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/28C04B7/21C04B28/14
CPCC04B7/21C04B7/28C04B28/144C04B2111/00767C04B2201/50C04B18/141C04B18/142C04B18/106C04B18/12Y02P40/10
Inventor 倪文张思奇王珂王莹李佳王一杰史腾宇
Owner 北科蕴宏环保科技(北京)有限公司
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