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A kind of silicon-rich magnesia nickel slag sulfate-resistant cement and preparation method thereof

A technology of anti-sulfate cement and ordinary Portland cement, applied in the direction of cement production, can solve the problems of volume expansion, loss of cement strength, etc., and achieve the effect of compact structure, less erosion, and improved hydration activity

Active Publication Date: 2020-08-04
YANCHENG GUOTAI CONCRETE
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Problems solved by technology

[0002] In special projects such as water conservancy facilities, underground tunnels, bridges, etc., cementitious materials with excellent sulfate resistance are required, and some of the solid phase components of the commonly used Portland cement chemically react with SO42- in the environment of sulfate erosion Causes volume expansion, leading to loss of cement strength

Method used

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  • A kind of silicon-rich magnesia nickel slag sulfate-resistant cement and preparation method thereof
  • A kind of silicon-rich magnesia nickel slag sulfate-resistant cement and preparation method thereof
  • A kind of silicon-rich magnesia nickel slag sulfate-resistant cement and preparation method thereof

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Embodiment Construction

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below.

[0022] A kind of silicon-rich and magnesium-rich nickel slag-resistant sulfate cement of the present invention comprises the following components: ordinary Portland cement, silicon-rich and magnesium-rich nickel slag, desulfurization gypsum, potassium dihydrogen phosphate, and the ordinary Portland cement , silicon-rich magnesium-containing nickel slag, desulfurized gypsum, and potassium dihydrogen phosphate are respectively 5-10%, 60-80%, 10-20%, and 10-20% by mass.

[0023] A method for preparing silicon-rich magnesium nickel slag-resistant sulfate cement, specifically comprising the following steps:

[0024] Step 1, grinding silicon-rich and magnesium-rich nickel slag with a mass percentage of 60-80% until it passes through a 0.08mm square hole sieve, leaving about 30% of the sieve to make fine nickel slag powder;

[0025] Step 2, the desulfurization...

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Abstract

The invention discloses sulfate-resistant cement with simatic-rich nickel slag. The sulfate-resistant cement with the simatic-rich nickel slag comprises, by mass, 60-80% of the simatic-rich nickel slag, 10-20% of flue gas desulfurization gypsum, 10-20% of potassium dihydrogen phosphate and 5-10% of ordinary silicate cement. Under joint activation of sulfate and phosphate activators, hydration activity of the simatic-rich nickel slag is improved, and hydration products mainly including gelatinous substances of MgKPO4-6H2O, xMg(OH)2-MgSO4-yH2O and (Mg-Fe)2SiO4-xH2O are generated under the actionof the activators, a small quantity of cement and a specific reaction temperature. The sulfate-resistant cement with the simatic-rich nickel slag is low in alkalinity, compact in structure, little affected by erosion under an acid environment, excellent in sulfate-resistant performance and innovative in technological approaches to effective utilization of the simatic-rich nickel slag.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a silicon-rich magnesium nickel slag-resistant sulfate cement and a preparation method thereof. Background technique [0002] In special projects such as water conservancy facilities, underground tunnels, bridges, etc., cementitious materials with excellent sulfate resistance are required, and some of the solid phase components of the commonly used Portland cement chemically react with SO42- in the environment of sulfate erosion Cause volume expansion, resulting in loss of cement strength. [Zang Zhinian, Performance characteristics and production technical requirements of sulfate-resistant cement [J]. Cement Engineering, 2015,28(06):25-26]. [0003] At present, the domestic market uses converter slag as a dopant to prepare sulfate-resistant cement with low alkalinity and low heat of hydration [Xu Weifang, Yang Xianghe. Production method of low-alkali, medium-heat, m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/153C04B7/21
CPCC04B7/153C04B7/21Y02P40/10
Inventor 仓定龙侯贵华张宏伟陈佳男许宁张勤芳曹月斌龚志明仓东芝仓冬婷成海翔卞连玉高峰谈启竹毛爱新张金顺王祥
Owner YANCHENG GUOTAI CONCRETE
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