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Preparation method of alkali excitation enhanced sulphoaluminate cement based material

A sulfoaluminate cement, reinforced technology, applied in the field of building materials, can solve problems such as excessive heat of hydration, strength shrinkage, etc., and achieve the effects of reducing economic costs, high early strength, and improving development speed

Inactive Publication Date: 2018-08-03
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Although sulfoaluminate cement has the advantages of early strength and high strength, the problems of excessive heat of hydration and later strength shrinkage need to be solved urgently

Method used

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  • Preparation method of alkali excitation enhanced sulphoaluminate cement based material
  • Preparation method of alkali excitation enhanced sulphoaluminate cement based material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Preparation of alkali-activated reinforced sulphoaluminate cement

[0025] (1) 480g sulfoaluminate cement is mixed with 120g fly ash cementitious material;

[0026] (2) the calcium hydroxide of 3g is dissolved in 360g water and is mixed with calcium hydroxide aqueous solution;

[0027] (3) Add the cementitious material to the calcium hydroxide aqueous solution and place it on a cement slurry mixer and stir slowly for four minutes.

Embodiment 2

[0029] Preparation of alkali-activated reinforced sulphoaluminate cement

[0030] (1) 450g sulfoaluminate cement and 150g fly ash account for cementitious material to mix;

[0031] (2) the calcium hydroxide of 6g is dissolved in 360g water and is mixed with calcium hydroxide aqueous solution;

[0032] (3) Add the cementitious material to the calcium hydroxide aqueous solution and place it on a cement slurry mixer and stir slowly for four minutes.

Embodiment 3

[0034] Preparation of alkali-activated reinforced sulphoaluminate cement

[0035] (1) 510g sulfoaluminate cement and 90g fly ash account for cementitious material to mix;

[0036] (2) the calcium hydroxide of 12g is dissolved in 360g water and is mixed with calcium hydroxide aqueous solution;

[0037] (3) Add the cementitious material to the calcium hydroxide aqueous solution and place it on a cement slurry mixer and stir slowly for four minutes.

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Abstract

The invention discloses a preparation method of an alkali excitation activated enhanced sulphoaluminate cement based material. The method comprises the following steps of (1) mixing sulphoaluminate cement and fly ash to be used as a gelling material; (2) dissolving calcium hydroxide into water to be prepared into a calcium hydroxide water solution; (3) adding the gelling material into the calciumhydroxide water solution; performing stirring. Various ingredients are contained; the sulphoaluminate cement is used as a base material; the fly ash is used as a modification agent; the calcium hydroxide solution is used as a modification regulating agent for preparing the modified sulphoaluminate cement. The prepared sulphoaluminate cement based material has the advantages that the initial curingand final curing time of the cement can be effectively shortened; the generation of hydration products of ettringite can be obviously promoted; the secondary hydration reaction of the fly ash is obviously promoted; the low long-term stage intensity increase of the sulphoaluminate cement is effectively solved; the economic cost is reduced; good economic benefits are realized.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a method for preparing an alkali-excited enhanced sulphoaluminate cement-based material. Background technique [0002] Sulphoaluminate cement has the characteristics of early strength, high strength, frost resistance, low alkalinity, and excellent durability. It is widely used in special projects such as rapid repairs and marine engineering, but it has defects such as slow strength development in the later stage and concentrated hydration heat release. limit its wide application. Therefore, how to improve the performance of sulphoaluminate cement and make it widely used has become one of the main research directions at present. Admixture is one of the indispensable important components in modern cement concrete, and adding admixture is an essential method to improve the performance of cement and concrete. The addition of an appropriate amount of fly ash c...

Claims

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Application Information

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IPC IPC(8): C04B28/06
CPCC04B28/06C04B2201/50C04B22/064C04B18/08
Inventor 桂雨廖宜顺刘高鹏郭大卫黄睿沈晴
Owner WUHAN UNIV OF SCI & TECH
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