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Alkali-activated-carbonate/slag compound gel material and preparation method thereof

A composite cementing material and a technology of cementing materials, which are applied in the field of alkali-activated carbonate/slag composite cementing materials, can solve the problems of insufficient density of hardened bodies, low energy consumption and cost, and low strength in the later stage, reaching the early stage The effect of fast strength development, low energy consumption and cost, and high strength in the later stage

Inactive Publication Date: 2007-10-03
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with traditional cementitious materials, this cementitious material can utilize a large amount of marginal carbonate ore, which expands the raw material resources of cementitious material production; The environmental pollution is small, but at present, the cementitious materials prepared by this method still have problems such as insufficient density and low strength in the later stage
For example, the patent No. is ZL99117089.X invention patent: the method of manufacturing calcium silicate cementitious materials under normal temperature with marginal limestone rocks, the prepared alkali-activated carbonate cementitious materials, due to the water glass and carbonate fine powder The degree of reaction between them is not large, resulting in insufficient density of the hardened body and low later strength. The 28d compressive strength is about 4.0MPa, and the impermeability pressure is about 0.60MPa. It is only suitable for sand-fixing and soil-fixing grouting in the formation. , Materials for soft foundation reinforcement grouting

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] In parts by mass, add 1.3 parts of barium chloride to 10 parts of water to dilute and stir until completely dissolved to prepare a barium chloride solution. Add 30 parts of slag powder into the barium chloride solution, stir evenly, and then add 39.5 parts of an activator whose modulus is 1.4 and whose mass concentration of sodium oxide and silicon oxide is 45%. The activator is composed of solid sodium silicate and The aqueous solution prepared by sodium hydroxide is added with 70 parts of carbonate ore powder with a content of 38.24% by mass of CaO and a content of 12.19% by mass of MgO. Material. After testing, the initial setting time of the prepared cementitious material is 7h8min, the final setting time is 7h54min, the compressive strength of the mortar test body is 29.3MPa at 3d, 61.8MPa at 28d, and 71.7MPa at 90d.

Embodiment 2

[0020] In terms of parts by mass, add 0.5 parts of barium chloride to 17.5 parts of water to dilute and stir until completely dissolved to obtain a barium chloride solution. Add 50 parts of slag powder into the barium chloride solution, stir evenly, and then add 32.5 parts of activator whose modulus is 1.4 and whose mass concentration of sodium oxide and silicon oxide is 53%. The activator is made of industrial water glass and hydrogen The aqueous solution prepared by sodium oxide is added with 50 parts of carbonate ore powder with a content of 32.55% by mass of CaO and a content of 19.17% by mass of MgO. After stirring evenly, the alkali-activated carbonate / slag composite gel Material. After testing, the initial setting time of the prepared cementitious material is 1h53min, and the final setting time is 2h29min. MPa.

Embodiment 3

[0022] In parts by mass, 1.4 parts of barium chloride was added to 14 parts of water to dilute and stirred until completely dissolved to obtain a barium chloride solution. Add 40 parts of slag powder into the barium chloride solution, stir evenly, then add 36 parts of activator whose modulus is 1.4 and the sum of the mass concentration of sodium oxide and silicon oxide is 55%. The activator is made of industrial water glass and hydrogen The aqueous solution prepared by sodium oxide is added with 60 parts of carbonate ore powder with a mass percentage of CaO of 33.57% and a mass percentage of MgO of 16.65%. After stirring evenly, the alkali-activated carbonate / slag composite cementitious material is obtained . After testing, the initial setting time of the prepared cementitious material is 6h32min, the final setting time is 7h07min, the compressive strength of the mortar test body is 49.2MPa at 3d, 84.9MPa at 28d, and 100.3 at 90d. MPa.

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Abstract

The invention relates to an alkali-activated-carbonate / slag compound gel material and preparation method which comprises, calculated by mass portions, diluting 0.5-2 parts of additive with 10-25 parts of water, charging 30-50 parts of slag powder into the prepared additive solution, agitating homogeneously, then charging 30-65 parts of natron sodium oxide having a modulus of 1.4-1.8 and exciting agent with the sum of mass concentration 45-55% with the silicon oxide, charging 50-70 parts of marginal carbonate powdered ore, agitating homogeneously, thus obtaining the end product.

Description

technical field [0001] The invention relates to the field of gelling materials, in particular to an alkali-activated carbonate / slag composite gelling material. Background technique [0002] Portland cement is the most widely used inorganic cementitious material, but its "two grinding and one burning" production process consumes a lot of resources and energy, and damages the ecological environment. In 1996, my country's proven limestone reserves that could be used for cement production were about 25 billion tons, and in 2003, my country's cement output reached 862 million tons. According to this development speed, it is estimated that my country's limestone resources for cement production will decrease within 30 to 50 years. Facing the danger of depletion, this is a very serious problem for a big cement producing country like ours. In recent years, a series of alkali-activated gelling materials have been researched and developed internationally, which have become an important...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B22/12C04B18/14C04B14/26C04B22/06
CPCY02W30/91
Inventor 殷素红余其俊赵三银文梓芸乔飞黄家琪王小萍
Owner SOUTH CHINA UNIV OF TECH
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