Method for preparing geopolymer gel material and geopolymer mortar

A technology of geopolymer and cementitious materials, which is applied in the field of preparation of geopolymer cementitious materials and geopolymer mortar, can solve the problems of complex preparation process, poor operability, and poor production and application, etc. Achieve the effects of simple preparation method, low processing and production cost, and realization of processing and resource utilization

Active Publication Date: 2018-10-09
TIANJIN BUILDING MATERIALS SCI RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process does not consider the environmental safety of heavy metals in the resource utilization of domestic waste incineration fly ash, but only considers the related properties of the prepared fly ash-based cem

Method used

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  • Method for preparing geopolymer gel material and geopolymer mortar
  • Method for preparing geopolymer gel material and geopolymer mortar
  • Method for preparing geopolymer gel material and geopolymer mortar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Preparation of fly ash-slag powder composite base geopolymer cementitious material:

[0060] 1) The preparation modulus is 1.3 The modulation of the composite activator:

[0061] First weigh 100 parts of water glass to prepare a composite activator with a modulus of 1.3, then weigh 10.59 parts of sodium hydroxide reagent according to the chemical composition of the water glass raw material, stir and add it to the weighed water glass, dissolve evenly and It is a composite activator with a modulus of 1.3;

[0062] 2) Control of raw materials: the composite activator dosage is 20%, and the Si / Al molar ratio is 2.70, and the Na / Si molar ratio is 0.36, and the fly ash, slag powder, and composite activator are weighed, and the Ca / Si molar ratio is 0.89, the mixture of 100 parts of fly ash and slag powder was stirred evenly;

[0063] 3) Weigh 32 parts of mixing water (the water-binder ratio is 0.32), mix the composite activator with the mixing water, and then add it to the 1...

Embodiment 2

[0067] Production and preparation of fly ash-slag powder composite base geopolymer cementitious material:

[0068] 1) According to embodiment 1 modulation modulus is the composite exciter of 1.3;

[0069] 2) Control of raw materials: the composite activator dosage is 20%, and the Si / Al molar ratio is 2.80, and the Na / Si molar ratio is 0.42, and the fly ash, slag powder, and composite activator are weighed, and the Ca / Si molar ratio is 0.92, stir and mix 100 parts of fly ash and slag powder taken by weighing;

[0070] 3) Weigh 33 parts of mixing water (the water-cement ratio is 0.33), mix the composite activator with the mixing water, and then add it to the mixed 100 parts of fly ash and slag powder gelling components;

[0071] 4) According to Example 1, carry out stirring molding and specimen curing to obtain fly ash-slag powder composite base geopolymer gelling material.

Embodiment 3

[0073] Production and preparation of fly ash-slag powder composite base geopolymer cementitious material:

[0074] 1) According to embodiment 1 modulation modulus is the composite exciter of 1.3;

[0075] 2) Control of raw materials: the composite activator dosage is 35%, and the Si / Al molar ratio is 3.26, and the Na / Si molar ratio is 0.46, and the fly ash, slag powder, and composite activator are weighed, and the Ca / Si molar ratio is 0.70, stir and mix 100 parts of fly ash and slag powder taken by weighing;

[0076] 3) Weigh 33 parts of mixing water (the water-cement ratio is 0.33), mix the composite activator with the mixing water, and then add it to the mixed 100 parts of fly ash and slag powder gelling components;

[0077] 4) According to Example 1, carry out stirring molding and specimen curing to obtain fly ash-slag powder composite base geopolymer gelling material.

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Abstract

The invention provides a method for preparing a geopolymer gel material and geopolymer mortar. The method comprises the following steps: carrying out drying, and fine grinding pre-treatment on fly ash; taking the pre-treated fly ash, mineral slag powder and a compound exciting agent according to the Si/Al mol ratio of 2.40 to 3.35, the Na/Si mol ratio of 0.30 to 0.50 and the Ca/Si mol ratio whichis less than or equal to 0.95, and uniformly mixing; adding blending water according to the mass ratio of the blending water to the sum of the fly ash and the mineral slag powder of 0.20 to 0.40, so as to obtain a neat paste mixture; filling the neat paste mixture into a mold; after curing the mold for 12 hours to 72 hours under the conditions that the temperature is 20 DEG C to 80 DEG C and the relative humidity is 50 percent to 95 percent, de-molding; after curing a de-molded test piece, obtaining the geopolymer gel material. According to the method provided by the invention, the combustionfly ash of domestic garbage and the mineral slag powder are used as gel components to produce and prepare the novel geopolymer gel material, and treatment and resource utilization of the fly ash are realized.

Description

technical field [0001] The invention belongs to the cross-technical field of solid waste treatment and resource utilization, and preparation of geopolymer materials, and in particular relates to a method for preparing geopolymer gelling materials and geopolymer mortar. Background technique [0002] At present, the output of urban domestic waste in my country is increasing day by day, and the domestic waste incineration method has the characteristics of high temperature sterilization, stable residue, significant volume reduction and energy recovery, and its application is becoming more and more extensive in my country. However, a large amount of fly ash will be produced during the incineration of domestic waste. The amount of fly ash in the fluidized bed incinerator is 15% to 20% of the incineration amount, and the amount of fly ash in the grate furnace is 3% to 5% of the incineration amount. At the same time, fly ash is enriched with a large amount of heavy metals and dioxin...

Claims

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Application Information

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IPC IPC(8): C04B12/00C04B28/00
CPCC04B12/005C04B28/006C04B2201/50C04B14/02C04B24/26C04B2103/302C04B2103/0068C04B2103/22C04B2103/65Y02P40/10
Inventor 李赵相陈佳宁王冬梅刘凤东白锡庆滕藤赵磊王德龙张秋菊李桂燕刘彤
Owner TIANJIN BUILDING MATERIALS SCI RES INST
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