Geopolymer permeable brick and preparation method thereof

A technology of geopolymers and permeable bricks, applied in cement production, etc., can solve problems affecting performance, complicated process, pressure, etc., and achieve the effects of no pressure forming, low energy consumption for preparation, and simple process

Active Publication Date: 2017-11-17
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, common pavement permeable bricks mainly include sintered ceramic permeable bricks, polymer permeable bricks and cement permeable bricks. Sintered ceramic permeable bricks have problems such as high cost, high energy consumption, and greenhouse gas emissions; The cost of permeable bricks is high, a

Method used

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  • Geopolymer permeable brick and preparation method thereof
  • Geopolymer permeable brick and preparation method thereof
  • Geopolymer permeable brick and preparation method thereof

Examples

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Example Embodiment

[0026] Example 1

[0027] The embodiment of the present invention provides a geopolymer permeable brick, including a base layer and a facing layer, the base layer including aggregate A, a cementitious material A and an activator, and the facing layer includes aggregate B and a cementitious material B and stimulant.

[0028] The mass fraction of aggregate A is 78% to 84%. Aggregate A is graded from two kinds of crushed stones, one of which has a particle size of 4.75-9.5mm and a mass fraction of 55%-65% ; Another kind of crushed stone has a particle size of 9.5-15mm and a mass fraction of 35%-45%.

[0029] The mass fraction of cementitious material A is 16%-24%, and the mass fraction of cementitious material A is uniformly mixed with fly ash and slag. The mass fraction of the fly ash is 10%-14%. The mass fraction of the slag It is 6% to 8%. The fly ash is fluidized bed fly ash, and the slag is granulated blast furnace slag.

[0030] The sum of the mass fractions of the aggregate A a...

Example Embodiment

[0043] Example 2

[0044] The embodiment of the present invention provides a geopolymer permeable brick. The raw material composition of the permeable brick is as follows:

[0045]

[0046] Please refer to figure 1 , A method for preparing geopolymer permeable bricks, including the following steps:

[0047] (1) Prepare the stimulant, dissolve 1.05kg of sodium hydroxide in 7.67kg of water glass, stir until the sodium hydroxide is completely dissolved, then prepare the stimulant, cool to normal temperature, and set aside;

[0048] (2) Add 20.28kg of 4.75-9.5mm crushed stone and 10.92kg of 9.5-15mm crushed stone into the concrete mixer and mix for 1min; add 5.6kg fly ash and 3.2kg slag into the concrete mixer, and the graded crushed stone Stone is mixed and stirred for 1 minute, then 8.0kg of activator is added, and mixed and stirred for 3 minutes to obtain the base material for preparing geopolymer permeable bricks; fly ash is fluidized bed fly ash, and slag is granulated blast furnace...

Example Embodiment

[0054] Example 3

[0055] The embodiment of the present invention provides a geopolymer permeable brick. The raw material composition of the permeable brick is as follows:

[0056]

[0057] Please refer to figure 1 , A method for preparing geopolymer permeable bricks, including the following steps:

[0058] (1) Prepare the stimulant, dissolve 0.71kg of sodium hydroxide in 5.17kg of water glass, stir until the sodium hydroxide is completely dissolved, and then prepare the stimulant, cool to normal temperature, and set aside;

[0059] (2) Add 18.9kg of 4.75-9.5mm crushed stone and 12.6kg of 9.5-15mm crushed stone into the concrete mixer and mix and mix for 1min; add 3.75kg fly ash and 2.25kg slag into the concrete mixer, and the graded crushed stone Stone is mixed and stirred for 1 minute, then 5.4kg of activator is added, and mixed and stirred for 3 minutes to obtain the base material for preparing geopolymer permeable bricks; fly ash is fluidized bed fly ash, and slag is granulated b...

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Abstract

The invention discloses a geopolymer permeable brick, which comprises a base layer and a decorative layer. The base layer comprises aggregate A, a gelling material A, and an exciting agent. The decorative layer comprises aggregate B, a gelling material B, and an exciting agent. The invention further provides a preparation method of the geopolymer permeable brick. The provided geopolymer permeable brick has the advantages that the sintering is not needed; the preparation energy consumption is low; the moulding can be carried out without pressure; the technology is simple, and a large amount of solid waste is consumed. The 28d compression strength of the permeable brick is 32.3 MPa or more. The 28d rupture strength is 3.18 MPa or more. The permeation coefficient is 0.028 cm/s or more.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a geopolymer permeable brick and a preparation method thereof. Background technique [0002] The traditional urban construction model is full of hardened roads. Whenever there is heavy rain, drainage is mainly relied on "grey" facilities such as pipes, canals, and pumping stations. The main planning and design concepts are "quick drainage" and "end-centralized" control, which often results in waterlogging every rain, and sudden changes in drought and flood. In recent years, the problem of urban waterlogging has become increasingly prominent. After heavy rains, many large cities have serious water accumulation. Therefore, the state vigorously advocates the construction of sponge cities, and has successively established 30 pilot cities to speed up the construction of sponge cities. [0003] Permeable bricks were first born in the Netherlands. After systematic research ...

Claims

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Application Information

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IPC IPC(8): C04B28/00
CPCC04B28/006C04B2111/00284C04B2111/00612C04B2201/50C04B14/02C04B14/06Y02P40/10
Inventor 段平武悦悦严春杰周伟浦嵩
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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