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Preparation method of fly ash based polymer concrete

A technology of fly ash and polymer is applied in the field of preparation of fly ash-based polymer concrete, which can solve the problems of polymer concrete not being widely used, incomplete hardening of polymer concrete, and low chemical activity of fly ash. , to achieve the best polymerization effect, good solidification time, and the effect of being conducive to construction

Inactive Publication Date: 2015-12-09
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the chemical activity of fly ash is low. At normal temperature, the polymerization reaction of fly ash is very slow and incomplete, so that the polymer concrete hardens slowly and the strength develops slowly. Therefore, the polymer concrete must be heated at 75°C-80°C Ideal mechanical properties can be obtained after curing for about 24 hours under high temperature conditions. It is precisely because of this that polymer concrete has not been widely used. So far, polymer concrete has only been used as a raw material for prefabricated components in the engineering field

Method used

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  • Preparation method of fly ash based polymer concrete
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  • Preparation method of fly ash based polymer concrete

Examples

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Embodiment 1

[0028] A preparation method of fly ash-based polymer concrete, comprising the following steps:

[0029] (1) Mix uniformly 1% cement and 99% fly ash by mass to obtain powder, the fly ash is low-calcium fly ash, the content of calcium oxide in the low-calcium fly ash is less than 10%, silicon The mass ratio of element and aluminum element is 1;

[0030] (2) Put the coarse aggregate and fine aggregate into the mixer according to the mass ratio of 9:5 and stir for 1 minute, then add the powder obtained in step (1) into the mixer, mix the powder and aggregate for 1 minute ;

[0031] Among them, the particle size of coarse aggregate is 10mm, and the bulk density is 1400kg / m 3 , the apparent density is 2600kg / m 3 , the moisture content is 0.3%; the particle size of the fine aggregate is 2mm, and the bulk density is 1300kg / m 3 , the apparent density is 2300kg / m 3 , moisture content is 0.1%.

[0032] (3) Add the alkali excitation liquid into the mixer, and mix and stir the alkali...

Embodiment 2

[0040] A preparation method of fly ash-based polymer concrete, comprising the following steps:

[0041] (1) Mixing 5% cement and 95% fly ash evenly to obtain powder, the fly ash is low-calcium fly ash, the content of calcium oxide in the low-calcium fly ash is less than 10%, silicon The mass ratio of element and aluminum element is 1;

[0042] (2) Put the coarse aggregate and fine aggregate into the agitator according to the mass ratio of 7:3 and stir for 2 minutes, then add the powder obtained in step (1) into the agitator, and the powder, coarse aggregate, fine bone Mix and stir for 2 minutes;

[0043] Among them, the particle size of coarse aggregate is 15mm, and the bulk density is 1450kg / m 3 , the apparent density is 2640kg / m 3 , the moisture content is 0.4%; the particle size of the fine aggregate is 3mm, and the bulk density is 1340kg / m 3 , the apparent density is 2360kg / m 3 , moisture content is 0.2%.

[0044] (3) Add the alkali excitation liquid into the mixer, ...

Embodiment 3

[0052] A preparation method of fly ash-based polymer concrete, comprising the following steps:

[0053] (1) Mixing 9% cement and 91% fly ash evenly by mass to obtain powder, the fly ash is low-calcium fly ash, and the content of calcium oxide in the low-calcium fly ash is less than 10%, silicon The mass ratio of element and aluminum element is 1;

[0054] (2) Put the coarse aggregate and fine aggregate into the agitator according to the mass ratio of 2:1 and stir for 2 minutes, then add the powder obtained in step (1) into the agitator. Mix and stir for 2 minutes;

[0055] Among them, the particle size of coarse aggregate is 22mm, and the bulk density is 1500kg / m 3 , the apparent density is 2700kg / m 3 , the moisture content is 0.5%; the particle size of the fine aggregate is 4mm, and the bulk density is 1400kg / m 3 , the apparent density is 2400kg / m 3 , moisture content is 0.3%.

[0056] (3) Add the alkali excitation liquid into the mixer, and mix and stir the alkali exci...

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Abstract

The invention discloses a preparation method of fly ash based polymer concrete. The preparation method comprises the following steps that 1, 1%-9% by mass of cement and 91%-99% by mass of fly ash are evenly mixed to obtain a powder material; 2, aggregate is added into a stirrer and is stirred for 1-2 minutes, then the powder material obtained in the step 1 is added into the stirrer, and the powder material and the aggregate are mixed and stirred for 1-2 minutes; 3, alkali activation liquid is slowly added into the stirrer, the alkali activation liquid, the powder material and the aggregate are mixed and stirred for 3-5 minutes to obtain the polymer concrete. The polymer concrete can be maintained at normal temperature, application and popularization of the polymer concrete are facilitated, further the Portland cement consumption is reduced, and consumption of natural resources, mineral resources and the like is reduced. In addition, the carbon dioxide emission amount can be reduced, and huge environmental benefit is brought.

Description

technical field [0001] The invention relates to the field, in particular to a preparation method of fly ash-based polymer concrete. Background technique [0002] Polymer concrete is a kind of engineering material. The fly ash in the production raw material is a by-product of thermal power plants, and has the same mechanical properties as or better than cement-based concrete. Compared with the production of cement-based concrete, the development and promotion of polymer concrete is conducive to reducing carbon dioxide emissions and mitigating the greenhouse effect. However, the chemical activity of fly ash is low. At normal temperature, the polymerization reaction of fly ash is very slow and incomplete, so that the polymer concrete hardens slowly and the strength develops slowly. Therefore, the polymer concrete must be heated at 75°C-80°C The ideal mechanical properties can be obtained after curing for about 24 hours under high temperature conditions. It is precisely because...

Claims

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Application Information

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IPC IPC(8): C04B28/26
Inventor 王清远张红恩石宵爽唐灵张宁黄琪姜丰
Owner SICHUAN UNIV
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