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Permeable concrete and its preparation method

A technology for permeable concrete and cement, applied in the field of concrete, can solve the problems affecting the popularization and application of permeable concrete, limited use range, blockage and other problems, and achieve the effects of good water permeability and air permeability, improving service life and reducing dosage requirements.

Active Publication Date: 2020-12-18
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of these recycled aggregates instead of natural aggregates reduces the demand for natural gravel in pervious concrete, but the water permeability of the prepared permeable concrete is limited in scope of use and prone to silting during use, which affects the promotion of pervious concrete use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The permeable concrete of the present embodiment, the proportion of raw materials used is by weight:

[0030] 25 parts of 3mm~6mm gravel, 15 parts of 6mm~10mm gravel, 35 parts of construction waste, 16.5 parts of portland cement, 1.65 parts of silica fume, 1.65 parts of polycarboxylate superplasticizer, 5 parts of water;

[0031] The particle size of the construction waste is 3-8 mm, and its component composition is proportioned by weight as follows:

[0032] 10 waste concrete blocks, 10 waste bricks, 15 waste stones.

[0033] The preparation of the permeable concrete of the present embodiment is carried out according to the following steps:

[0034] Step 1, under the condition of 15-20 ° C, the Portland cement, silica fume and polycarboxylate superplasticizer are mixed according to the weight ratio and stirred evenly to obtain a mixed dry material;

[0035] Step 2, pretreat the construction waste: put the construction waste in a crusher for crushing, pass through a 3...

Embodiment 2

[0040] The permeable concrete of the present embodiment, the proportion of raw materials used is by weight:

[0041] 30 parts of 3mm~6mm gravel, 20 parts of 6mm~10mm gravel, 20 parts of construction waste, 20 parts of portland cement, 2 parts of silica fume, 2 parts of polycarboxylate superplasticizer, 6 parts of water;

[0042] The particle size of the construction waste is 3-8 mm, and its component composition is proportioned by weight as follows:

[0043] 5 parts of waste concrete blocks, 5 parts of waste bricks, 10 parts of waste stones.

[0044] The preparation of the permeable concrete of the present embodiment is carried out according to the following steps:

[0045] Step 1, under the condition of 15-20 ° C, the Portland cement, silica fume and polycarboxylate superplasticizer are mixed according to the weight ratio and stirred evenly to obtain a mixed dry material;

[0046] Step 2, pretreat the construction waste: put the construction waste in a crusher for crushing,...

Embodiment 3

[0052] The permeable concrete of the present embodiment, the proportion of raw materials used is by weight:

[0053] 25 parts of 3mm~6mm gravel, 25 parts of 6mm~10mm gravel, 23 parts of construction waste, 18 parts of portland cement, 1.8 parts of silica fume, 1.8 parts of polycarboxylate superplasticizer, 5.4 parts of water;

[0054] The particle size of the construction waste is 3-8 mm, and its component composition is proportioned by weight as follows:

[0055] 5 waste concrete blocks, 5 waste bricks, 13 waste stones.

[0056] The preparation of the permeable concrete of the present embodiment is carried out according to the following steps:

[0057] Step 1, pretreat the construction waste: put the construction waste in a crusher for crushing, pass through a 3mm sieve and an 8mm sieve, and then place it in a sorting machine for sorting to remove the construction waste attached to the surface hardened cement stone;

[0058] Step 2, under the condition of 15-20 ° C, the Po...

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Abstract

The invention provides a pervious concrete which comprises the following raw materials in parts by weight: 25-30 parts of gravels being 3-6 mm, 15-25 parts of gravels being 6-10 mm, 20-35 parts of construction wastes, 16.5-20 parts of cement, 1.65-2 parts of silica fume, 1.65-2 parts of a water reducer and 5-6 parts of water, wherein the construction wastes comprise the following components in parts by weight: 5-10 parts of abandoned concrete blocks, 5-10 parts of abandoned bricks and 10-15 parts of abandoned stones. Compared with the pervious concrete using ordinary portland cement as a cementing material, adopting coarse aggregates of single size and using little or none fine aggregates, the invention studies the reasonable collocation of the content of each raw material through a plurality of experiments, thereby enabling the pervious concrete prepared by the invention to have better performances.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to a permeable concrete and a preparation method thereof. Background technique [0002] In recent years, urban rainstorm disasters and urban water pollution have become one of the core issues restricting the ecological development of cities in my country. However, traditional impermeable pavements are difficult to meet the urban drainage needs. Therefore, the natural accumulation, natural infiltration, and natural purification as the goal The "sponge city" theory has been promoted and practiced. "Sponge city" means that the city can absorb, store, infiltrate and purify water like a sponge when it rains, and reduce the surface drainage pressure; when necessary, the stored water can be "released" and used. The construction of "sponge city" is closely related to urban rainwater drainage, water resource conservation, water environment protection, urban micro-environmental quality and u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2111/00284C04B2201/20C04B2201/50C04B18/12C04B18/16C04B18/146C04B24/24
Inventor 肖衡林谭源陈智马强刘数华胡智阙梦珂肖彧高华雨陈贝朱云涛刘伦
Owner HUBEI UNIV OF TECH
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