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Decontaminable water-permeable concrete and preparation method thereof

A technology of permeable concrete and cement, applied in the field of porous concrete, can solve the problems of large pores, low strength of ceramsite, and insufficient decontamination ability of permeable concrete, and achieve strong decontamination ability, high mechanical strength, and enhanced purification of runoff rainwater effect of ability

Inactive Publication Date: 2018-04-13
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, due to the low strength of ceramsite itself and the large pores of permeable concrete, the existing permeable concrete pavement has the defects of insufficient decontamination ability and low strength.

Method used

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  • Decontaminable water-permeable concrete and preparation method thereof
  • Decontaminable water-permeable concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0041] The preparation method of decontamination permeable concrete of the present invention comprises the steps:

[0042] (10) Aggregate wetting: add all the aggregates including ceramsite and 50% water in the mixing device, stir for 30s, and make the surface of the aggregate wet;

[0043] (20) Mixing: Add all the cement, fly ash, reinforcing agent and water reducer to the aggregate with wet surface, and stir for 60 seconds to make it fully and evenly stirred;

[0044] (30) Discharging: add the remaining amount of water into the stirring device, stir evenly, charge in layers, insert and pound into shape, and cure to obtain decontamination and permeable concrete.

[0045] Preferably, in the (30) discharging step, each layer is inserted and rammed 30 times when the layered material is charged and rammed to form, and the spacing and strength are guaranteed to be uniform, and finally smoothed by hand.

[0046] Preferably, in the (30) discharging step, the maintenance is specific...

Embodiment 1

[0051] (1) Raw materials: aggregate 75%-80% (ceramsite replaces part of aggregate, aggregate replacement rate is 10%), cement 13%-17%, water 3%-6%, fly ash 1%-2 %, strengthening agent 0.34%-0.73%, superplasticizer 0.05%-0.09%. The cement used is ordinary Portland cement with P.O 42.5, and its property index meets the standard requirements; the aggregate is selected from Anhui basalt, and the apparent relative density is 2.870g / cm 3 , the particle size is 4.75mm-9.50mm; the water reducing agent is selected from Sika brand polycarboxylate high-efficiency water reducing agent of Jiangsu Temisi Concrete Admixture Co., Ltd.; the reinforcing agent is selected from Beijing Dechang Weiye special reinforcing agent for permeable concrete; Clay ceramsite with a particle size of 5-10mm produced by Zhejiang Huzhou Xinxiang Ceramic Products Co., Ltd. was selected.

[0052] (2) Preparation of decontamination and permeable concrete: ① Add all aggregates (including ceramsite instead of aggreg...

Embodiment 2

[0057] (1) Raw materials: aggregate 75%-80% (ceramsite replaces part of aggregate, aggregate replacement rate is 20%), cement 13%-17%, water 3%-6%, fly ash 1%-2 %, strengthening agent 0.34%-0.73%, superplasticizer 0.05%-0.09%. The materials used, the preparation, and the purification effect test are the same as in Example 1.

[0058] (2) The test results are shown in the table below:

[0059]

[0060]It can be seen from the test results of each embodiment that the present invention can reduce the amount of rainwater runoff, slow down the runoff velocity, and reduce the peak runoff coefficient of rainwater based on a large number of voids in pervious concrete, while the relationship between compressive strength, flexural strength and porosity of pervious concrete There is a relationship between compressive and flexural strengths that gradually decrease with the increase of porosity, and reinforcing agents are used in the preparation to ensure the strength of its performance...

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Abstract

The invention discloses decontaminable water-permeable concrete with strong decontamination ability and high mechanical strength and a preparation method thereof. The decontaminable water-permeable concrete is composed of the following components in percentages by mass: 75% to 80% of aggregate, 13% to 17% of cement, 3% to 6% of water, 1% to 2% of fly ash, 0.34% to 0.73% of a reinforcing agent and0.05% to 0.09% of a water reducing agent, wherein 10% to 20% of the aggregate is replaced by ceramsite as an improvement. The preparation method for the decontaminable water-permeable concrete comprises the following steps: (10) aggregate moisturizing: a step of adding all aggregate including the ceramsite and 50% of the water into a stirrer, and carrying out stirring for 30 s so as to moisturizethe surface of the aggregate; (20) material mixing: a step of adding the cement, the fly ash, the reinforcing agent and the water reducing agent into surface-moisturized aggregate, and carrying out stirring for 60 s; and (30) material discharging: a step of adding remained water into the stirrer, carrying out uniform mixing under stirring, filling a material by layers, carrying out intercalation tamping for molding, and carrying out curing so as to obtain the decontaminable water-permeable concrete.

Description

technical field [0001] The invention belongs to the technical field of porous concrete, in particular to a decontamination permeable concrete with strong decontamination ability and high mechanical strength and a preparation method thereof. Background technique [0002] By the end of 2016, my country's urbanization rate had reached 57.35%. The resulting large-scale urban expansion has led to over-exploitation of hydrological resources, a rapid increase in the proportion of dense pads, an increase in the coefficient of flood peak runoff, and the intensification of urban flood disasters. . At the same time, with the increase of traffic volume, road surface runoff pollution has become a problem that cannot be ignored. Traditional dense roads, due to their impervious characteristics, when rainfall occurs, rainwater collects in a short period of time, resulting in a rapid increase in short-term runoff and a large instantaneous flow rate, which also enhances the scour effect, ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B38/08
CPCC04B28/04C04B2111/00284C04B18/027C04B18/08C04B2103/302C04B2103/0068
Inventor 康爱红卢志萍娄可可徐雪玲董星海
Owner YANGZHOU UNIV
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