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Concrete resistant to sulfur dioxide corrosion

A sulfur dioxide and concrete technology, applied in the field of concrete materials, can solve problems such as environmental pollution, waste of resources, and unavailability of use

Inactive Publication Date: 2017-05-31
INNER MONGOLIA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Industrial waste such as fly ash and slag powder cannot be used due to long-term disposal due to technical and economic reasons, which not only causes waste of resources, but also causes environmental pollution

Method used

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  • Concrete resistant to sulfur dioxide corrosion
  • Concrete resistant to sulfur dioxide corrosion
  • Concrete resistant to sulfur dioxide corrosion

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Experimental program
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Embodiment

[0026] The selection of concrete raw material of the embodiment of the present invention:

[0027] Concrete cement: Ordinary Portland cement PO.42.5 is used for concrete, and its physical properties are shown in Table 1.

[0028] Fine aggregate: The particle size of the medium sand is less than 5mm, and the bulk density, fineness modulus, mud content, apparent density, and gradation are all qualified.

[0029] Ordinary coarse aggregate: gravel particle size 5-25mm, bulk density, fineness modulus, mud content, apparent density, gradation and other performance indicators are qualified.

[0030] Fly ash: Class II fly ash is used, and its performance indicators are shown in Table 2.

[0031] Slag powder: S75 slag powder is used, and its performance indicators are shown in Table 3.

[0032] The physical property index of table 1 cement

[0033]

[0034] Table 2 Physical performance index of fly ash

[0035]

[0036] The physical property index of table 3 slag powder

[0...

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Abstract

The invention provides concrete resistant to sulfur dioxide corrosion. The concrete is prepared from the following gel materials: 15 percent by weight of coal ash, 10 to 15 percent by weight of slag powder and the balance of cement. According to the concrete resistant to sulfur dioxide corrosion, the coal ash and the slag powder are used to replace part of cement in the gel materials, and meanwhile, a replacement rate of the slag powder in the concrete is reasonably selected, thus the effect of resisting SO2 corrosion by the concrete is realized, and the durability of the concrete is improved.

Description

technical field [0001] The invention relates to the technical field of concrete materials, in particular to a concrete resistant to sulfur dioxide corrosion. Background technique [0002] Industrial wastes such as fly ash and slag powder are discarded for a long time due to technical and economic reasons and cannot be used, which not only causes waste of resources, but also causes environmental pollution. In 2009, the annual output of blast furnace slag in my country reached 200 million tons, and the annual output of fly ash reached 400 million tons. There is no exact statistics on other wastes, and the amount of wastes accumulated over the years is huge. If industrial waste (slag, fly ash, steel slag, phosphorus slag, silica fume, etc.) can be mixed into concrete, the pozzolanic effect of industrial waste can be activated, and its morphological effect and micro-aggregate effect can be fully utilized to develop a concrete that can Concrete products that resist the special in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B111/20C04B111/23C04B111/24
CPCC04B28/04C04B2111/2015C04B2111/23C04B2111/24C04B2201/50C04B18/08C04B18/141C04B20/0076
Inventor 牛建刚王潇鹏吴斌刘晓
Owner INNER MONGOLIA UNIV OF SCI & TECH