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A geopolymer permeable brick and its preparation method and application

A technology of geopolymers and permeable bricks, applied in cement production, adsorption water/sewage treatment, etc., can solve problems such as overalkaline and alkali loss, achieve low cost, avoid alkali loss, and improve water resistance

Active Publication Date: 2022-03-01
钠石生态科技(深圳)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, geopolymer-based materials have not been applied on a large scale in this field. One of the important reasons is that the geopolymer system is too alkaline, and the system contains a large amount of free alkali, which makes it easy to form alkali when it meets water. The phenomenon of loss and weathering efflorescence cannot avoid the pollution of water and soil environment and the decline of the performance of permeable brick materials

Method used

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  • A geopolymer permeable brick and its preparation method and application
  • A geopolymer permeable brick and its preparation method and application
  • A geopolymer permeable brick and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0034] A method for preparing a geopolymer permeable brick, comprising the following process steps:

[0035] a. Stir and mix 22 parts of cementitious material and 78 parts of aggregate according to the mass ratio, then add an activator equivalent to 72% of the mass of the cementitious material, and mix evenly to obtain a mixing slurry;

[0036] Among them, the cementitious material includes: 20% blast furnace slag, 40% waste incineration ash and 40% metakaolin in terms of mass percentage, and the particle size of blast furnace slag, waste incineration ash and metakaolin is ≤45μm;

[0037] The aggregates used are artificial aggregates formed by crushing and screening construction solid waste; aggregates include coarse aggregates with a particle size of 5-10mm and fine aggregates with a particle size of 2-3mm, and the mass content of the coarse aggregate The mass content of fine aggregate is 70%.

[0038] The activator is obtained by mixing sodium water glass with a modulus of ...

Embodiment 2

[0044] A method for preparing a geopolymer permeable brick, comprising the following process steps:

[0045] a. Stir and mix 30 parts of cementitious material and 70 parts of aggregate according to the mass ratio, then add an activator equivalent to 75% of the mass of the cementitious material, and mix evenly to obtain a mixing slurry;

[0046] Among them, the cementitious material includes: 25% blast furnace slag, 50% waste incineration ash and 25% metakaolin in terms of mass percentage, and the particle size of blast furnace slag, waste incineration ash and metakaolin is ≤45μm;

[0047]The aggregate used is iron tailings slag; the aggregate includes coarse aggregate with a particle size of 5-10mm and fine aggregate with a particle size of 2-3mm, wherein the mass content of the coarse aggregate is 35%, and the mass content of the fine aggregate is The content is 65%.

[0048] The activator is obtained by mixing sodium water glass with a modulus of 3.5 and 10 mol / L sodium hyd...

Embodiment 3

[0053] A method for preparing a geopolymer permeable brick, comprising the following process steps:

[0054] a. Stir and mix 38 parts of cementitious material and 62 parts of aggregate according to the mass ratio, then add an activator equivalent to 80% of the quality of the cementitious material, and mix evenly to obtain a mixing slurry;

[0055] Among them, the cementitious material includes: 30% blast furnace slag, 60% waste incineration ash and 10% metakaolin in terms of mass percentage, and the particle size of blast furnace slag, waste incineration ash and metakaolin is ≤45μm;

[0056] The aggregate used is waste ceramics; the aggregate includes coarse aggregate with a particle size of 5-10mm and fine aggregate with a particle size of 2-3mm, wherein the mass content of the coarse aggregate is 40%, and the mass content of the fine aggregate is 60%.

[0057] The activator is obtained by mixing sodium water glass with a modulus of 3.6 and 11 mol / L sodium hydroxide solution...

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Abstract

The invention relates to the technical field of resource utilization of solid waste, and specifically discloses a geopolymer permeable brick and its preparation method and application. The preparation method of the geopolymer permeable brick includes: a. Stirring and mixing the cementitious material and aggregate, then adding an activator, and mixing uniformly to obtain a mixing slurry; b. Adding the mixing slurry to a mold for extrusion molding, Sealing and maintaining to obtain a molded sample; c. After drying the molded sample, place it in n-octyltriethoxysilane for ultrasonic impregnation, take it out and dry it, and obtain a geopolymer permeable brick. The geopolymer permeable brick obtained by the preparation method of the present invention has excellent mechanical strength, water permeability and hydrophobic performance, and also realizes high-efficiency adsorption of various water pollutants, and the geopolymer permeable brick is used as a paving material for a permeable pavement It can not only adapt to environmental changes and deal with urban waterlogging, drought and other disasters caused by rain, but also significantly reduce the pollution of groundwater and soil.

Description

technical field [0001] The invention relates to the technical field of resource utilization of solid waste, in particular to a geopolymer permeable brick and its preparation method and application. Background technique [0002] In order to enable the city to adapt to environmental changes in a timely manner like a sponge and deal with urban waterlogging, drought and other disasters caused by rain, more and more attention has been paid to permeable brick pavements in urban construction. [0003] The existing types of permeable bricks mainly include: cement-based permeable bricks, high-temperature sintered porous ceramic permeable bricks and resin polymer permeable bricks. Whether it is a cement-based permeable brick or a porous ceramic permeable brick, a high-temperature calcination process is required. However, resin polymer permeable bricks are prone to aging when exposed to sunlight, and their durability is poor. At the same time, the current permeable bricks only have t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C04B12/00C04B41/62C02F1/28
CPCC04B28/006C04B12/005C04B41/62C04B41/46C02F1/28C04B2111/00284C04B2111/0075C04B2111/00793C04B18/165C04B18/16C04B18/12Y02P40/10
Inventor 邵宁宁董志君冯登朝
Owner 钠石生态科技(深圳)有限公司
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