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A kind of polyaluminum chloride waste slag recycled concrete curb and its preparation method

A technology of polyaluminum chloride and recycled concrete is applied in the field of road building materials, which can solve the problems of polluting resources and waste, and achieve the effects of increasing specific surface area, good water retention, and improving bleeding and segregation performance.

Active Publication Date: 2022-04-29
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the serious environmental pollution caused by polyaluminum chloride waste slag and the waste of resources caused by other construction wastes in the prior art, a kind of polyaluminum chloride waste slag regenerated concrete curb and its preparation method are provided, which can reduce polyaluminum chloride The stacking of industrial waste and construction waste realizes recycling of waste while reducing pollution to the natural environment and reducing the amount of cement used in concrete mixtures, which has significant economic and social benefits

Method used

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  • A kind of polyaluminum chloride waste slag recycled concrete curb and its preparation method
  • A kind of polyaluminum chloride waste slag recycled concrete curb and its preparation method
  • A kind of polyaluminum chloride waste slag recycled concrete curb and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A polyaluminum chloride waste slag regenerated concrete curb, according to the mass per unit volume, including the following raw materials: sand 600kg / m 3 , recycled coarse aggregate 400kg / m 3 , natural coarse aggregate 800kg / m 3 , thermal activation (calcination at 1000°C for 2h) polyaluminum chloride waste slag 40kg / m 3 , Cement 220kg / m 3 , fly ash 80kg / m 3 , water 153kg / m 3 , water-binder ratio 0.45; Water-reducer dosage is 0.30% (mass per unit volume) of gelling material, defoamer dosage is 0.10% (mass per unit volume) of gelling material, and alkali activator includes NaOH 2.5kg / m 3 、Na 2 SiO 3 14.0kg / m 3 And gypsum 1kg / m 3 ; Among them, heat-activated polyaluminum chloride waste residue, cement and fly ash are cementitious materials.

[0050] The preparation method of polyaluminum chloride waste slag recycled concrete curb comprises the following steps:

[0051] (1) Strengthening of recycled coarse aggregate: first, use NaOH to 2 SiO 3 Adjust the mo...

Embodiment 2

[0058] A polyaluminum chloride waste slag regenerated concrete curb, according to the mass per unit volume, including the following raw materials: sand 600kg / m 3 , recycled coarse aggregate 400kg / m 3 , natural coarse aggregate 800kg / m 3 , heat activation (calcination at 1000°C for 2h) PAC waste slag 80kg / m 3 , Cement 220kg / m 3 , fly ash 40kg / m 3 , water 153kg / m 3, water-binder ratio 0.45; Water-reducer dosage is 0.30% (mass per unit volume) of gelling material, defoamer dosage is 0.10% (mass per unit volume) of gelling material, and alkali activator includes NaOH 2.5kg / m 3 、Na 2 SiO 3 14.0kg / m 3 And gypsum 1kg / m 3 ; Among them, heat-activated polyaluminum chloride waste residue, cement and fly ash are cementitious materials.

[0059] The preparation method of the polyaluminum chloride waste slag recycled concrete curb is the same as in Example 1.

Embodiment 3

[0061] A polyaluminum chloride waste slag regenerated concrete curb, according to the mass per unit volume, including the following raw materials: sand 690kg / m 3 , recycled coarse aggregate 375kg / m 3 , natural coarse aggregate 750kg / m 3 , heat activation (calcination at 1000°C for 2h) polyaluminum chloride waste residue 80kg / m 3 , cement 260kg / m 3 , fly ash 40kg / m 3 , water 152kg / m 3 , water-binder ratio 0.40; The superplasticizer dosage is 0.55% (mass per unit volume) of the gelling material, the dosage of defoamer is 0.15% (mass per unit volume) of the gelling material, and the alkali activator includes NaOH 1.25kg / m 3 、Na 2 SiO 3 7.70kg / m 3 And gypsum 0.55kg / m 3 ; Among them, heat-activated polyaluminum chloride waste residue, cement and fly ash are cementitious materials.

[0062] The preparation method of the polyaluminum chloride waste slag recycled concrete curb is the same as in Example 1.

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Abstract

The invention discloses a polyaluminum chloride waste slag regenerated concrete curb and a preparation method thereof. The raw materials include: sand 600-690kg / m in terms of mass per unit volume 3 , recycled coarse aggregate 375 ~ 400kg / m 3 , natural coarse aggregate 750~800kg / m 3 , Thermally activated polyaluminum chloride waste residue 40-80kg / m 3 , Cement 220~260kg / m 3 , Fly ash 40~80kg / m 3 , the water-to-cement ratio is 0.40-0.45; the amount of water-reducing agent is 0.30-0.55% of the gelling material, the amount of defoamer is 0.10-0.15% of the gelling material, and the amount of alkali activator is 2.5-0.5% of the gelling material 5.3%. The present invention adopts industrial waste polyaluminum chloride waste slag and recycled aggregate to make road curbs. The production method is simple and the cost is low, which can effectively reduce the large amount of polyaluminum chloride waste slag and construction waste piled up, and can also reduce the waste of high energy consumption cement. The amount used is of great significance to reduce construction costs and reduce environmental pollution, and has good social and economic benefits.

Description

technical field [0001] The invention relates to a curb stone and a preparation method thereof, in particular to using waste materials produced in the polyaluminum chloride industry to replace part of Portland cement to prepare an environmentally friendly curb stone after thermal activation treatment, which belongs to the technical field of road building materials. Background technique [0002] Polyaluminum chloride waste residue is a by-product of industrial production of polyaluminum chloride. Polyaluminum chloride (PAC) is an efficient flocculant in water treatment. There are many methods for producing polyaluminum chloride (PAC) at home and abroad. The method is a two-step method of acid-dissolving bauxite and calcium aluminate powder, that is, bauxite and calcium aluminate powder react with hydrochloric acid or mixed acid under certain conditions to obtain liquid polyaluminum chloride (PAC), and the residual solid forms waste residue. Every ton of polyaluminum chloride ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/50C04B2201/52C04B18/0481C04B14/06C04B12/04C04B22/062C04B2103/302C04B2103/22C04B2103/50C04B18/08C04B18/167
Inventor 徐平丁亚红韩冬龚健张敏霞崔宇豪王兴国张向冈王雨利徐海宾李新功夏祖滨段李莉
Owner HENAN POLYTECHNIC UNIV
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