Blockage-resistant pervious concrete as well as preparation method and application thereof

A permeable concrete and anti-blocking technology, applied in the field of building materials, can solve the problems of reduced pavement permeability, economic waste, large porosity, etc., and achieve the effect of improving compressive strength and freeze-thaw resistance, and avoiding strength reduction.

Active Publication Date: 2016-12-07
JIANGSU VOCATIONAL INST OF ARCHITECTURAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the general permeable concrete pavement or permeable brick has relatively large porosity due to the requirement of water permeability. After the permeable concrete pavement is built, a large amount of suspended particles (such as mud sand, debris, etc.) T

Method used

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  • Blockage-resistant pervious concrete as well as preparation method and application thereof

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preparation example Construction

[0039] The present invention provides a method for preparing the anti-blocking permeable concrete described in the above technical solution, comprising the following steps:

[0040] (1) mixing water reducer, redispersible latex powder and water to obtain a mixed solution;

[0041] (2) Portland cement, crushed stone, quartz sand, fly ash, slag micropowder and modified polypropylene fiber are mixed to obtain a mixed material;

[0042] (3) Mixing the mixed solution obtained in the step (1) and the mixed material obtained in the step (2) to obtain an anti-blocking permeable concrete.

[0043] There is no chronological order restriction between said step (1) and step (2).

[0044] The invention mixes the water reducing agent, the redispersible latex powder and water to obtain a mixed solution. The present invention has no special requirements on the mixing method, and a mixing method well known to those skilled in the art can be used. In the present invention, the mixing process...

Embodiment 1

[0057] 22 parts of Portland cement, 38 parts of continuously graded crushed stone with a particle size of 5-16mm, the mud content of the crushed stone is 0.8wt%, 28 parts of quartz sand with a particle size of 0.55mm, (I) grade pulverized coal 3 parts of ash, the fineness of fly ash is 9%, the water demand ratio of fly ash is not more than 95%, the 7-day activity index is not less than 75% and the 28-day activity index is not less than 95% slag fine powder5 parts, the specific surface area of ​​slag fine powder is 450m 2 / kg, the particle size of slag powder is 15 μm, 0.40 parts of modified polypropylene fiber, 2 parts of Wacker5044N with a particle size of 10 μm, 1.3 parts of PCA—I carboxylic acid high-performance water reducer, and the solid content of the water reducer is 30wt%. , the water reduction rate is 40%, and water is added according to the water-binder ratio of 0.30.

[0058] Modified polypropylene fiber is obtained by modifying polypropylene 6820 with 7008p hydro...

Embodiment 2

[0062] 30 parts of Portland cement, 35 parts of continuously graded crushed stone with a particle size of 5-16mm, the mud content of the crushed stone is 0.5wt%, 25 parts of quartz sand with a particle size of 0.55mm, (I) grade pulverized coal 2 parts of ash, the fineness of fly ash is 10%, the water demand ratio of fly ash is not more than 95%, the 7-day activity index is not less than 75% and the 28-day activity index is not less than 95% 3 parts of slag micropowder , the particle size of slag powder is 20μm, and the specific surface area of ​​slag powder is 450m 2 / kg, 0.48 parts of modified polypropylene fiber, 2.2 parts of wacker5044N with a particle diameter of 5 μm, 1.2 parts of PCA-I carboxylic acid high-performance water reducing agent, the solid content of the water reducing agent is 40wt%, and the water reducing rate is 45%. Based on the water-binder ratio of 0.32, add water.

[0063]Modified polypropylene fiber is obtained by modifying polypropylene 6820 with 7008...

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Abstract

The invention provides blockage-resistant pervious concrete. The water glue ratio of the blockage-resistant pervious concrete is 0.28-0.38. The blockage-resistant pervious concrete is prepared from the following components in parts by weight: 22-30 parts of silicate cement, 34-42 parts of macadam, 24-32 parts of quartz sand, 2-5 parts of pulverized coal ash, 3-6 parts of micro powder of ore residues, 0.3-0.5 part of modified polypropylene fibers, 1-3 parts of redispersible latex powder, 1-2 parts of a water reducing agent and water. According to the blockage-resistant pervious concrete disclosed by the invention, the pervious principle of conventional concrete with macropore is changed, the perviousness of the concrete is improved by using functional material components namely the modified polypropylene fibers, and the macadam and the quartz sand are matched for use, so that the small pore rate of the concrete is guaranteed, the modified polypropylene fibers and the small pores of the concrete are utilized for perviousness, and massive suspending particles or organic fine particles are prevented from entering large pores to block the pores along with water currents; and the modified polypropylene fibers are used and are effectively combined with other components in the pervious concrete, so that the perviousness of the pervious concrete is further improved.

Description

technical field [0001] The invention relates to the field of building materials, in particular to an anti-blocking permeable concrete and its preparation method and application. Background technique [0002] In the process of urbanization, the surface of the city is gradually hardened and covered by water-blocking materials such as buildings and concrete. These impermeable pavements have brought great negative impacts on the ecological environment of the city, such as slippery in rainy days, glare, and urban floods. and the urban heat island effect. [0003] Permeable concrete is an ecological and environmentally friendly concrete. It is a concrete with continuous pores made by a special process. It has a certain strength and a certain degree of air and water permeability. Permeable concrete pavement can alleviate urban rain and flood, reduce slippage and glare in rainy days, improve the safety and comfort of driving, absorb sound and reduce noise, and alleviate the urban h...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B38/00C04B111/20
CPCC04B28/04C04B2111/00284C04B2111/29C04B2201/50C04B14/02C04B14/06C04B18/08C04B18/141C04B16/0633C04B2103/0057C04B2103/302C04B38/00
Inventor 缪正坤王东田国华刘伟王国安林丽娟季元戚豹王智勇
Owner JIANGSU VOCATIONAL INST OF ARCHITECTURAL TECH
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