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Alkali-activated gelling material and preparation method thereof

A technology of cementitious material and alkali excitation, applied in cement production and other directions, can solve the problems of high cost calcium silicate slag and other problems, and achieve the effects of less environmental pollution, low production cost and excellent mechanical properties

Active Publication Date: 2016-06-08
CHINA BUILDING MATERIALS ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problem of relatively high cost in preparing alkali-activated cementitious materials from metakaolin, slag and fly ash and the deficiency in resource utilization technology of calcium silicate slag, the present invention provides a calcium silicate slag as the main raw material preparation A new type of alkali-activated gelling material

Method used

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  • Alkali-activated gelling material and preparation method thereof
  • Alkali-activated gelling material and preparation method thereof
  • Alkali-activated gelling material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Example 1. Effects of different activator dosages on the performance of alkali-activated gelling materials prepared from silicon-calcium slag as the main raw material

[0032] Liquid water glass (Na 2 O nSiO 2 ) as activator, modulus n is 2.40, detects the impact of different activator dosages on the performance of alkali-activated gelling material, the preparation method of alkali-activated gelling material of the present invention comprises the following steps:

[0033] 1) After drying the original silicon-calcium slag, grind it in a ball mill to 26.0% to 28.0% of the 80μm sieve;

[0034] 2) Mix 70% (mass percentage) silicon-calcium slag micropowder with 30% (mass percentage) mineral powder (400m 2 / kg), mix uniformly to obtain calcium silicate slag-mineral powder composite powder;

[0035] 3) Under the conditions of water-cement ratio 0.50 (including water brought in by liquid water glass) and mortar-sand ratio 1:3, press Na 2 O content accounts for 0%, 1%, 2%, 3%,...

Embodiment 2

[0041] Embodiment 2, the liquid water glass (Na 2 O nSiO 2 ) on the properties of alkali-activated gelling materials prepared with silicon-calcium slag as the main raw material

[0042] Liquid water glass (Na 2 O nSiO 2 ) as an activator, the modulus n is 1.40 to 3.20, and liquid water glass (Na 2 O nSiO 2 ) on the influence of alkali-activated gelling material performance, the preparation method of alkali-activated gelling material of the present invention comprises the following steps:

[0043] 1) After drying the original silicon-calcium slag, grind it in a ball mill to 26.0% to 28.0% of the 80μm sieve;

[0044] 2) Mix 70% (mass percentage) silicon-calcium slag micropowder with 30% (mass percentage) mineral powder (400m 2 / kg), mix uniformly to obtain calcium silicate slag-mineral powder composite powder;

[0045] 3) Under the condition of water-cement ratio 0.50 (including the water brought in by liquid water glass) and mortar-sand ratio 1:3, according to Na in wate...

Embodiment 3

[0052] Embodiment 3, different mineral powders (400m 2 / kg) and ultrafine mineral powder (600m 2 / kg) content on the properties of alkali-activated gelling materials prepared with silicon-calcium slag as the main raw material

[0053] Liquid water glass (Na 2 O nSiO 2 ) as an exciter, the modulus n is 2.40, to detect different mineral powders (400m 2 / kg) and ultrafine mineral powder (600m 2 / kg) on ​​the influence of alkali-activated gelling material performance, the preparation method of alkali-activated gelling material of the present invention comprises the following steps:

[0054] 1) After drying the original silicon-calcium slag, grind it in a ball mill to 26.0% to 28.0% of the 80μm sieve;

[0055] 2) Mix 70% (mass percentage) silicon-calcium slag micropowder with 30%, 25%, 20%, 15%, 10%, 5%, 0% (mass percentage) mineral powder (400m 2 / kg) and 0%, 5%, 10%, 15%, 20%, 25%, 30% (mass percentage) ultrafine mineral powder (600m 2 / kg) (corresponding sample numbers ar...

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Abstract

The invention discloses an alkali-activated gelling material and a preparation method thereof. The alkali-activated gelling material provided by the invention takes calcium silicate slag as a main material and liquid water glass as an activator, does not need to be subjected to high-temperature calcinations, can be prepared at a normal temperature, and comprises the following components in percent by mass: 70% of calcium silicate slag micro-powder, 15%-25% of mineral powder, 5%-15% of superfine mineral powder, and water glass (Na2O.nSiO2 with the modulus n of 2.00-3.00) with the Na2O content accounting for 1%-5% of the weight of the powder. Compared with the prior art, the alkali-activated gelling material takes the calcium silicate slag as the main material, is low in production cost and low in resource and energy consumption, reflects environmental protection and circular economy conceptions, and has a wide market application prospect.

Description

technical field [0001] The invention relates to a gelling material for construction engineering, in particular to an alkali-activated gelling material prepared by using silicon-calcium slag and a preparation method thereof. Background technique [0002] Since the 1940s, people have stimulated industrial waste residues (metakaolin, slag, fly ash, etc.) . Since the alkali-activated gelling material uses industrial waste residue as the main raw material, and has unique advantages in early strength, high temperature resistance, acid corrosion resistance, and consolidation of metal ions, it has attracted widespread attention worldwide since its birth. focus on. [0003] A lot of research has been done at home and abroad on the preparation of alkali-activated gelling materials from waste residues. For example, Davidovits of France has developed a novel alkali-activated metakaolin cementitious material with metakaolin as the main raw material; patent document CN1699252A disclose...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/14C04B7/36
CPCY02P40/10
Inventor 张文生叶家元史迪张建波
Owner CHINA BUILDING MATERIALS ACAD