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Gelled material for soil solidification

A technology for soil solidification and cementitious materials, applied in cement production and other directions, can solve the problems of high prices, insufficient supply, large consumption, etc., and achieve the effects of high market prices, lower production costs, and reduced environmental pollution.

Inactive Publication Date: 2014-06-11
NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, waste slag such as phosphorus slag and steel slag are generally used in industrial production of soil cementitious materials, but due to the large amount of use and insufficient supply, the price rises and the cost is relatively high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Aluminum slag powder 20%, slag powder 50%, fly ash 15%, desulfurization gypsum 10%, sodium silicate 5%. Aluminum slag powder cementitious material performance indicators: setting time: initial setting 156min, final setting 330min; stability qualified; compressive strength: F3d is 16.0MPa, F28d is 39.5MPa; flexural strength: F3d is 3.9MPa, F28d is 6.5 MPa. The mixing ratio of aluminum slag micropowder cementitious material is 14%, the water-cement ratio is 0.45, and the 28-day unconfined compressive strength is 1.2MPa.

[0018] Wherein, F3d refers to the strength of the cementitious material when it is hardened for 3 days, and F28d refers to the strength of the cementitious material when it is hardened for 28 days. The meanings of F3d and F28d in the following examples are the same as those in Example 1.

Embodiment 2

[0020] Aluminum slag powder 30%, slag powder 35%, fly ash 18%, desulfurization gypsum 12%, sodium sulfate 2%,

[0021] Triethanolamine 3%. Performance index of aluminum slag powder cementitious material: setting time is 180min for initial setting and 350min for final setting; stability is qualified; compressive strength: F3d is 14.0MPa, F28d is 35.5MPa; flexural strength: F3d is 3.5MPa, F28d is 6.0 MPa. The aluminum slag micropowder cementitious material has a curing agent mixing ratio of 14%, a water-cement ratio of 0.5, and a 28-day unconfined compressive strength of 0.91MPa.

Embodiment 3

[0023] Aluminum slag powder 40%, slag powder 25%; fly ash 20%, desulfurization gypsum 12%, aluminum sulfate 3%. Performance index of aluminum slag powder cementitious material: setting time is 200min for initial setting, final setting is 375min; stability is qualified; compressive strength: F3d is 12.0MPa, F28d is 33.5MPa; flexural strength: F3d is 3.3MPa, F28d is 5.2 MPa. The aluminum slag micropowder cementitious material has a curing agent mixing ratio of 14%, a water-cement ratio of 0.5, and a 28-day unconfined compressive strength of 0.88MPa.

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Abstract

The invention provides a gelled material for soil solidification, belonging to the technical field of gelled materials. The gelled material comprises the following raw materials in percentage by mass: 20-40% of aluminum dreg micropowder, 30-50% of slag micropowder, 5-20% of fly ash, 10-15% of desulfurized gypsum and 1-5% of additive. The aluminum dreg micropowder adopted by the gelled material disclosed by the invention is aluminum-containing solid waste generated during production engineering of electrolytic aluminum, so that the waste is reused, the cost is saved, and the environment can be protected.

Description

technical field [0001] The invention belongs to the field of building materials, in particular to a cementitious material used for soil solidification. Background technique [0002] China's electrolytic aluminum industry is in a stage of rapid development and has become the world's largest producer of electrolytic aluminum. According to statistics, electrolytic aluminum enterprises with an annual output of 100,000 tons emit 5,000 tons of aluminum slag every year, and there are about 200,000 to 300,000 tons of aluminum slag in the country every year, which is a huge amount. At present, landfill and stockpiling are generally used, which not only takes up a large amount of land, causes environmental pollution, but also causes the loss and waste of many useful chemical components. On the other hand, aluminum slag is a renewable resource, but it has never been used. get enough attention. Therefore, it is necessary to rationally recycle and utilize this part of solid waste to tu...

Claims

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Application Information

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IPC IPC(8): C04B7/26
CPCY02P40/10
Inventor 孙家瑛张国良徐亨严秀生
Owner NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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