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Preparation method for mortar with chlorine-salt-erosion resistance and environmental friendliness

A kind of mortar and environmental protection technology, applied in the field of building materials, can solve the problems of discomfort, poor environmental protection performance, etc., and achieve the effect of reducing the diffusion coefficient, protecting the environment and ecology, and reducing shrinkage

Active Publication Date: 2018-03-30
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Patent CN1061106439A "New Environmental Protection Mortar" discloses a new type of thermal insulation mortar in the embodiment. However, natural sand is still used, and it is not suitable for coastal areas with high chloride content
Patent CN104140231A "An Environmentally Friendly Waterproof Mortar" discloses an environmentally friendly waterproof mortar component, which is composed of ordinary Portland cement, quartz sand, active materials, cellulose ether and pure acrylic emulsion. Portland cement, poor environmental performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] An environmentally friendly mortar resistant to chlorine salt erosion is composed of 35% powder by weight, 50% machine-made sand and 15% liquid material. Among them: the powder is composed of the following components by weight: slag 80, desulfurized gypsum 8, metakaolin 3, sodium hydroxide 3, sodium silicate 4, sodium carbonate 2; liquid material is composed of the following components by weight: water 95, polycarboxylate superplasticizer 2, shrinkage reducing agent 3.

[0020] Preparation method: first mix and stir the powder for 3 minutes to fully mix the material, then put the machine-made sand into the mixed material and stir for 3 minutes, finally add water, water reducing agent and shrinkage reducing agent and continue stirring for 5 minutes.

[0021] The selected raw materials are as follows:

[0022] The slag produced by Shandong Laiwu Iron and Steel Group Powder Material Branch has a specific surface area of ​​550Kg / m 2 ;

[0023] Shandong Changyi Gypsum Pow...

Embodiment 2

[0031] An environmentally friendly mortar resistant to chlorine salt erosion is composed of 42% powder by weight, 40% machine-made sand and 18% liquid material. Among them: the powder is composed of the following components by weight: slag 75, desulfurized gypsum 10, metakaolin 9, sodium hydroxide 1.6, sodium silicate 3, sodium carbonate 1.4; liquid material is composed of the following components by weight: water 97, polycarboxylate high-efficiency water reducer 1, shrinkage reducer 2; the selected raw materials are as follows: slag produced by Shandong Laiwu Iron and Steel Group Powder Material Branch, with a specific surface area of ​​550Kg / m 2 ; Shandong Changyi Gypsum Powder Company produces desulfurized gypsum; Shandong Weifang Zhongliang Chemical Company produces sodium hydroxide; Shandong Weifang Haihua Co., Ltd. produces sodium silicate; Shandong Weifang Haihua Co., Ltd. produces sodium carbonate; TS-JS polycarboxylate high-efficiency water reducer; polyether shrinkag...

Embodiment 3

[0033] Embodiment 3 (comparative example)

[0034] An ordinary portland cement mortar is composed of 42% by weight of ordinary portland cement, 40% of natural sand and 18% of liquid material. Among them, the liquid material is composed of the following components by weight: water 97, polycarboxylate superplasticizer 1, and shrinkage reducing agent 2.

[0035] The selected raw materials are as follows: Shanshui brand ordinary Portland cement P.O42.5 produced by Zibo Shanshui Cement Co., Ltd., standard sand produced by Xiamen Aisou Standard Sand Co., Ltd., fineness modulus 2.5, local tap water in Zibo, Shandong Tong TS-JS polycarboxylate high-efficiency water reducer produced by Sheng Building Materials Co., Ltd.; polyether shrinkage reducer SRA(l) produced by Jiangsu Bote New Material Co., Ltd.;

[0036] Preparation method: first mix and stir the powder for 3 minutes to fully mix the material, then put sand into the mixed material and stir for 3 minutes, finally add water, wat...

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Abstract

The invention belongs to the field of building materials, relates to a technology of preparing anti-corrosion mortar by utilizing industrial wastes, and provides a preparation method for mortar with chlorine-salt-erosion resistance and environmental friendliness. The mortar is composed of the following components in percentages by weight: 35 to 45% of a powder material, 35 to 50% of machine-made sand and 15 to 18% of a liquid material, wherein the weight percentages of all the components sum to 100%; the powder material is composed of the following components in parts by weight: 75 to 83 partsof mineral slag, 8 to 12 parts of gypsum, 3 to 9 parts of metakaolin, 1.6 to 3.0 parts of sodium hydroxide, 3.0 to 5.0 parts of sodium silicate and 0.4 to 2.0 parts of sodium carbonate; and the liquid material is composed of the following components in parts by weight: 95 to 97.2 parts of water, 0.8 to 2.0 parts of a water reducing agent and 1.0 to 3.0 parts of a shrinkage reducing agent. The mortar provided by the invention reduces the environmental pollution of solid wastes, enhances the ability of resisting chlorine salt erosion, and is applicable to areas with high chlorine salt content.

Description

technical field [0001] The invention belongs to the field of building materials, and relates to the preparation of chlorine-salt erosion-proof and environment-friendly mortar by using industrial solid waste. Background technique [0002] Mortar is a building material widely used in civil engineering activities. In wall masonry, single blocks are bonded into a whole, and it plays a role in protecting structural components and decoration in plastering projects; at present, the production of mortar in our country Cement is basically used as cementitious material, and natural sand is used as aggregate. [0003] my country's cement production accounts for 60% of the world's cement production, and the resulting carbon dioxide emissions reach 6.7 billion tons per year, causing serious damage to the environment and ecology. The Chinese government is adopting a series of corresponding laws and systems to prohibit or limit cement production and use. It is one of the urgent problems i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/08C04B111/20
CPCC04B28/08C04B2111/20C04B18/12C04B22/002C04B18/141C04B22/145C04B14/106C04B22/062C04B22/10C04B2103/302C04B24/32C04B12/04
Inventor 王军鞠泽青张世义
Owner SHANDONG UNIV OF TECH