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Novel clay soil polyporous materials and method of producing the same

A technology of porous materials and clays, applied in the fields of foamed porous materials, geopolymer materials and foamed porous materials, to achieve the effects of high air permeability, low cost and simple process

Inactive Publication Date: 2009-07-29
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention belongs to the composite technology of geopolymer system direct foaming process and adding pore-forming agent process, especially after low-temperature foaming, the high-temperature sintering process is exempted, and it is not limited by the manufacturing shape. After searching, there is no similar technical declaration patent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Raw material ratio: solid S component and parts (by 100 parts by weight) ratio are as follows:

[0035] Metakaolin: 60 parts

[0036] Burnt clay: 40 parts

[0037] Parts (by 100 parts by weight) proportioning of liquid phase L component and water:

[0038] Sodium silicate (modulus 1.2): 60 parts

[0039] Water: 40 parts

[0040] Concrete preparation process is as follows:

[0041] (1) It will be obtained by calcining metakaolin raw ore powder of more than 200 mesh or kaolin powder after washing and optimization in air at 600-900°C for 2 hours;

[0042] (2) the water glass and water that the modulus is 1.2 are mixed in proportion and stand-by;

[0043] (3) Mix the solid phase S and the liquid L at a weight ratio of 1:1, adjust the viscosity to 0.5 Pa.S, stir for 30 minutes and homogenize before use;

[0044] (4) Pour the slurry into a high-temperature-resistant mold, place it in a high-temperature room at about 150°C, and foam at a constant temperature for 4 hours ...

Embodiment 2

[0047] Raw material ratio: solid S component and parts (by 100 parts by weight) ratio are as follows:

[0048] Metakaolin: 100 parts

[0049] Burnt clay: 0 parts

[0050] Parts (by 100 parts by weight) proportioning of liquid phase L component and water:

[0051] Sodium silicate (modulus 2.0): 40 parts

[0052] Potassium silicate (modulus 2.0): 40 parts

[0053] Water: 20 parts

[0054] Concrete preparation process is as follows:

[0055] 1) with embodiment 1;

[0056] 2) mixing potassium water glass and sodium water glass with a modulus of 2.0 in proportion, adding water and stirring evenly for later use;

[0057] 3) Mix metakaolin and liquid L at a weight ratio of 1:1.2, adjust the viscosity to 1.5 Pa.S, stir for 30 minutes and homogenize before use;

[0058] 4) Pour the slurry into a high-temperature-resistant mold, place it in a high-temperature room at about 170°C, and foam at a constant temperature for 3 hours before demoulding;

[0059] 5) Cut the obtained porou...

Embodiment 3

[0061] Raw material ratio: solid S component and parts (by 100 parts by weight) ratio are as follows:

[0062] Metakaolin: 0 parts

[0063] Burnt clay: 100 parts

[0064] Parts (by 100 parts by weight) proportioning of liquid phase L component and water:

[0065] Sodium silicate (modulus 1.2): 70 parts

[0066] Water: 30 parts

[0067] Concrete preparation process is as follows:

[0068] 1) with embodiment 1

[0069] (1) Sodium silicate and water with a modulus of 1.2 are mixed uniformly in proportion and set aside;

[0070] (2) Mix the burnt clay and liquid L in a weight ratio of 1:1, adjust the viscosity to 1.0 Pa.S, stir for 30 minutes and homogenize before use;

[0071] (3) Pour the slurry into a high-temperature-resistant mold, place it in a high-temperature room at about 200°C, and foam at a constant temperature for 5 hours before demoulding;

[0072] (4) Cut the obtained porous material into regular shapes and test its mechanical properties and pore structure. The ...

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Abstract

The invention discloses a novel clay-type porous material and a preparation method thereof. The preparation method comprises the steps of taking metakaolin (or chainotte) as a raw material, taking industrial water glass as an alkali-exciting agent and adopting a direct foaming process under a low temperature (between 120 and 200 DEG C) to prepare the porous material which takes geopolymers as a framework and has good performances. Results of performance tests on the porous materials show that the clay-type porous material has the compressive strength between 2.0 and 9.0Mpa, the apparent porosity between 30 and 70 percent and the volume density between 0.40 and 1.0 g / cm<3>, and can resist a high temperature above 800 DEG C. The porous material with different performances and pore structures can be obtained by controlling different mixture ratio and reaction conditions. The preparation method has the advantages of simple process and low cost, and is hopeful of obtaining wide application in the fields of heat preservation materials, waste-gas adsorbing materials, wastewater filtering materials, energy absorbing materials and the like.

Description

technical field [0001] The present invention relates to the field of geopolymer materials and foam porous materials, especially with metakaolin (burned clay) and industrial potassium (sodium) water glass as the main reactants, forming a porous material skeleton through geopolymerization, and directly Foam porous material prepared by foaming. Background technique [0002] Geopolymeric materials belong to alkali-activated gelling materials. The application of this kind of material can be traced back to ancient times, that is, kaolin, from dolomite or limestone and salt lake composition Na 2 CO 3 , plant ash component K 2 CO 3 And the mixture of silica, after adding water and stirring, it will produce strong alkali NaOH and KOH, which will react with other components to form a mineral polymer binder to make artificial stone. Afterwards, people's research on the subject of geopolymers originated from the results of people's research on the hardening mechanism of cement. In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/26C04B38/08C04B14/10
CPCC04B28/008C04B2201/50C04B2111/28C04B2201/20Y02P40/10C04B14/106C04B38/0074C04B38/02
Inventor 崔学民唐洁郁军丽韩要丛刘海峰
Owner GUANGXI UNIV
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