Strength controllable coal ash-based polymer concrete and preparation method thereof

A technology of fly ash and concrete, which is applied in the field of fly ash-based geopolymer concrete and its preparation, and achieves the effects of resource saving, large-scale and high-efficiency utilization, and simple preparation process

Inactive Publication Date: 2013-12-11
WENZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the mix ratio design method and preparation process of ordinary concrete are no longer applicable to fly ash-based geopolymer concret

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Raw material ratio:

[0021] Mixed solid phase S component and parts (by weight) proportioning are as follows:

[0022] 47 parts of coarse aggregate crushed stone (particle size 5-30mm, continuous grading) in saturated surface dry state;

[0023] 26 parts of fine aggregate natural sand in saturated surface dry state (gradation zone II, fineness modulus 2.8);

[0024] 27 parts of fly ash;

[0025] Silica fume 0 parts;

[0026] Sodium tripolyphosphate 0.12 part.

[0027] The proportion (by weight) of the L component of the mixed liquid phase and the NaOH solution (10mol / L):

[0028] Water glass (modulus 3.2): 67 parts;

[0029] NaOH solution (10mol / L): 33 parts.

[0030] Concrete preparation process is as follows:

[0031] (1) Soak sand and gravel aggregates (that is, coarse aggregate crushed stone and fine aggregate natural sand) in water for 24 hours, take them out and place them in the lower water-permeable container to dry naturally until there is no free water...

Embodiment 2

[0039] Raw material ratio:

[0040] Mixed solid phase S component and parts (by weight) proportioning are as follows:

[0041] 47 parts of coarse aggregate crushed stone (particle size 5-30mm, continuous grading) in saturated surface dry state;

[0042] 26 parts of fine aggregate natural sand in saturated surface dry state (gradation zone II, fineness modulus 2.8);

[0043] 24 parts of fly ash;

[0044] 3 parts of silica fume;

[0045] Sodium tripolyphosphate 0.1 part.

[0046] The proportion (by weight) of the L component of the mixed liquid phase and the NaOH solution (14mol / L):

[0047] Water glass (modulus 3.2): 67 parts;

[0048] NaOH solution (14mol / L): 33 parts.

[0049] Concrete preparation process is as follows:

[0050] (1) Soak the sand and gravel aggregates in water for 24 hours, take them out and place them in the lower permeable container to dry naturally until there is no free water on the surface, that is, to obtain the sand and gravel aggregates in a satu...

Embodiment 3

[0058] Raw material ratio:

[0059] Mixed solid phase S component and parts (by weight) proportioning are as follows:

[0060] 47 parts of coarse aggregate crushed stone (particle size 5-30mm, continuous grading) in saturated surface dry state;

[0061] 26 parts of fine aggregate natural sand in saturated surface dry state (gradation zone II, fineness modulus 2.8);

[0062] 22 parts of fly ash;

[0063] 5 parts of silica fume;

[0064] 0.08 parts of sodium tripolyphosphate.

[0065] The proportion (by weight) of the L component of the mixed liquid phase and the NaOH solution (18mol / L):

[0066] Water glass (modulus 3.2): 67 parts;

[0067] NaOH solution (18mol / L): 33 parts.

[0068] Concrete preparation process is as follows:

[0069] (1) Soak the sand and gravel aggregates in water for 24 hours, take them out and place them in the lower permeable container to dry naturally until there is no free water on the surface, that is, to obtain the sand and gravel aggregates in...

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Abstract

The invention provides a strength controllable coal ash-based polymer concrete. The polymer concrete comprises a mixed solid phase and a mixed liquid phase, wherein the weight ratio of the mixed solid phase and the mixed liquid phase is 11:1, the mixed solid phase comprises the following components in parts by weight: 45-55 parts of coarse aggregate gravel, 13-33 parts of fine aggregate natural sand, 19-27 parts of coal ash, 0-8 parts of silica fume, and 0.05-0.12 part of sodium tripolyphosphate, and the mixed liquid phase comprises the following components in parts by weight: 67-75 parts of liquid sodium silicate for industrial use, and 25-33 parts of 10-18mol/L of sodium hydroxide solution. A preparation method for the coal ash-based polymer concrete is simple, has no toxicity and no contamination, and has low cost, and the raw material spreads all over the world and is expected to be used in fields such as corrosion resistant concrete construction, utilization of industrial wastes, rapid patching materials, high-strength high performance materials and the like. Furthermore, according to the coal ash-based polymer concrete, large amount of industrial waste coal ash can be efficiently used, so that the coal ash-based polymer concrete has great significance to conservation of energy and resources and environment protection. The invention also provides the preparation method of the coal ash-based polymer concrete.

Description

technical field [0001] The invention relates to the field of geopolymer materials and preparation thereof, in particular to a fly ash-based geopolymer concrete with controllable strength and a preparation method thereof. Background technique [0002] Geopolymeric materials are mainly alkali-activated geopolymeric gel materials. The research on alkali-induced geopolymeric materials is relatively early, and the application of such materials can be traced back to ancient times, that is, kaolin, 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 or KOH, which will react with other components to form geopolymeric binder and make artificial stone. Geopolymer, as an inorganic polymeric aluminosilicate material, has been extensively studied worldwide due to its excellent properties. Due to its special inorganic polycondensation three-dimensional o...

Claims

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Application Information

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IPC IPC(8): C04B28/06
Inventor 谢子令李显杨克家周华飞
Owner WENZHOU UNIVERSITY
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