Preparation method of geopolymer-based permeable brick

A technology of permeable bricks and geopolymers, which is applied in the field of preparation of geopolymer-based permeable bricks, and achieves the effects of simple preparation process, low cost and less equipment

Pending Publication Date: 2018-06-05
JIANGSU PROVINCE METALLURGICAL DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the prior art has not yet applied geopolymers to the research in the field of building materials

Method used

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  • Preparation method of geopolymer-based permeable brick

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preparation example Construction

[0035] Such as figure 1 Shown, the present invention provides a kind of preparation method of geopolymer base permeable brick, comprises the following steps:

[0036] (1) Preparation of permeable brick aggregate

[0037] After the first red mud melting slag is crushed and sieved, the permeable brick aggregate with a particle size of 3-5mm is obtained.

[0038] (2) Prepare the gelling material

[0039] Mix the crushed, sieved and ground second red mud slag, the ground calcined kaolin and the ground blast furnace slag according to the mass ratio of 1:(0.4-0.8):(0.1-0.3) , to obtain mixed powder;

[0040] In a preferred embodiment, the particle size of the pulverized second red mud slag is 25-48 μm; the pulverized calcined kaolin and the pulverized blast furnace slag both have a particle size of 25-48 μm. In a preferred embodiment, the activator is technical grade water glass, wherein Na 2 The mass fraction of O is 7.5%-12.8%, SiO 2 The mass fraction is 24.6%-27.6%, and the...

Embodiment 1

[0050] (1) Preparation of permeable brick aggregate

[0051] After the first red mud melting slag is crushed and sieved, the permeable brick aggregate with a particle size of 3-5mm is obtained.

[0052] (2) Prepare the gelling material

[0053] uniformly mixing the crushed, sieved and ground second red mud slag, ground calcined kaolin and ground blast furnace slag at a mass ratio of 1:0.45:0.1 to obtain a mixed powder;

[0054] The particle size of the second red mud slag after grinding is 25-48 μm; the particle size of the calcined kaolin after grinding is 25-48 μm, and the particle size of the blast furnace slag after grinding is 25-48 μm. The activator is industrial grade water glass, where Na 2 The mass fraction of O is 8.75%, SiO 2 The mass fraction is 27.6%, and the modulus is 3.3. When in use, adjust the modulus of the water glass to 1.2 with NaOH.

[0055] (3) Preparation of geopolymer cementitious material

[0056] The mixed powder, the activator and water were mi...

Embodiment 2

[0064] (1) Preparation of permeable brick aggregate

[0065] After crushing and sieving the first red mud melting slag, the permeable brick aggregate with a particle size of 4-5mm is obtained.

[0066] (2) Prepare the gelling material

[0067] uniformly mixing the crushed, sieved and ground second red mud slag, ground calcined kaolin and ground blast furnace slag according to the mass ratio of 1:0.5:0.2 to obtain mixed powder;

[0068] The particle size of the second red mud slag after grinding is 25-38 μm; the particle size of the calcined kaolin after grinding is 25-38 μm, and the particle size of the blast furnace slag after grinding is 25-38 μm. The activator is industrial grade water glass, where Na 2 The mass fraction of O is 8.75%, SiO 2 The mass fraction is 27.6%, and the modulus is 3.3. When in use, adjust the modulus of the water glass to 1.2 with NaOH.

[0069] (3) Preparation of geopolymer cementitious material

[0070] The mixed powder, the activator and wat...

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Abstract

The invention discloses a preparation method of a geopolymer-based permeable brick. The preparation method comprises the following steps: crushing and screening first red mud slag to obtain permeablebrick aggregate; uniformly mixing crushed, screened and ground second red mud slag, ground calcined kaolin and ground blast furnace slag to obtain mixed powder; uniformly mixing and stirring the mixedpowder, an activator and water to obtain a geopolymer cementing material; adding the geopolymer cementing material into the permeable brick aggregate, stirring, then filling into a mould, and moulding to a semifinished geopolymer-based permeable brick; and curing the obtained semifinished geopolymer-based permeable brick at room temperature, then demoulding to obtain the demoulded semifinished geopolymer-based permeable brick, and curing the demoulded semifinished geopolymer-based permeable brick by using microwave to obtain the finished geopolymer-based permeable brick. By the preparation method, the consumption of cement and the emission of CO2 greenhouse gas are reduced; and the obtained geopolymer-based permeable brick has excellent strength and a long service life.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a preparation method of geopolymer-based permeable bricks. Background technique [0002] With the rapid development of my country's economy and the gradual acceleration of urbanization, the surface of the earth is gradually covered by various buildings, cement, concrete, and natural stone. This kind of impermeable ground material cannot allow rainwater to seep into the ground, resulting in a drop in the urban groundwater level, and in case of heavy rain, it is easy to cause urban waterlogging only by drainage system drainage. , heat exchange, can not adjust the surface temperature and humidity, together with the building to form the urban "heat island effect". [0003] my country promulgated the "Technical Guidelines for Sponge City Construction" in October 2014, proposing to build a sponge city with natural accumulation, natural infiltration, and natural ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B18/04C04B40/00
CPCC04B18/0409C04B28/005C04B40/0014C04B2111/00284C04B2201/50Y02P40/10Y02W30/91
Inventor 苏双青边妙莲陈士朝马冬阳李亚奇孙辉吴道洪
Owner JIANGSU PROVINCE METALLURGICAL DESIGN INST
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