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No-fines recycled-aggregate pervious concrete for district roads and preparation method

A technology of permeable concrete and recycled concrete, applied in sustainable waste treatment, solid waste management, climate change adaptation, etc., can solve problems such as urban waterlogging, casualties, property loss, etc., to reduce ground water, improve the environment, configure The effect of simple and efficient technology

Active Publication Date: 2014-08-06
JIANGSU VOCATIONAL INST OF ARCHITECTURAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Rainwater on the ground flows into the groundwater network, which puts pressure on urban drainage during flood seasons, causing urban waterlogging, and even low-lying deep water, causing property losses and casualties

Method used

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  • No-fines recycled-aggregate pervious concrete for district roads and preparation method
  • No-fines recycled-aggregate pervious concrete for district roads and preparation method
  • No-fines recycled-aggregate pervious concrete for district roads and preparation method

Examples

Experimental program
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Effect test

Embodiment example 1

[0024] This implementation case is used for the sand-free recycled aggregate permeable concrete used in the roads of the residential area. The quality components of the sand-free recycled aggregate permeable concrete used are as follows:

[0025]

[0026] The above-mentioned architectural recycled concrete aggregates come from the recycled aggregates formed by crushing and processing the demolished components of a concrete frame structure (primary concrete strength C30-C35). 12.4%3 , mud content (by mass) 0.6% 3 >1350kg / m 3 , water absorption 2.5% ≤ 5.0%, bulk porosity 48%. Recycled concrete aggregates for construction are subjected to alkalization treatment before configuration, and are used under the condition of saturated surface dryness.

[0027] The above cement is Portland cement with a strength grade of 42.5 MPa.

[0028] The above-mentioned composite mineral admixture SiO 2 Content 90%, specific surface area ≥ 400kg / m 2 , 7d and 28d activity indices are not less...

Embodiment example 2

[0032] This implementation case is used in the configuration technology of sand-free recycled aggregate permeable concrete for roads in residential areas. The quality components of the sand-free recycled aggregate permeable concrete used are as follows:

[0033]

[0034]

[0035] The building recycled concrete aggregates are derived from the recycled aggregates formed by crushing and processing the demolished components of a concrete frame structure (primary concrete strength C30-C40). Value 11.7%3 , mud content (by mass) 0.5% 3 >1350kg / m 3, water absorption 2.4% ≤ 5.0%, bulk porosity 50%. Recycled concrete aggregates for construction are subjected to alkalization treatment before configuration, and are used under the condition of saturated surface dryness.

[0036] The cement is Portland cement with a strength grade of 42.5MPa.

[0037] The composite mineral admixture SiO 2 Content 90%, specific surface area ≥ 400kg / m 2 , 7d and 28d of The activity index is not lo...

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Abstract

The invention discloses no-fines recycled-aggregate pervious concrete for district roads and a preparation method and belongs to the field of pervious concrete. The no-fines recycled-aggregate pervious concrete is prepared from the components as follows: 1450-1600 kg / m<3> of recycled building concrete aggregate, 300-450 kg / m<3> of cement, 78-117 kg / m<3> of composite mineral admixture, 3.8-5.6 kg / m<3> of an additive and 105-145 kg / m<3> of water. The water permeability of the prepared pervious concrete is not less than 5 mm / s, the continuous porosity is not less than 10 percent, the compressive strength is not less than 20 MPa, the rupture strength is not less than 2.5 MPa, and the mass loss rate after 25 times of freezing and thawing cycles is at most 5 percent. The recycled aggregate with the concrete structure is utilized, the pervious concrete can improve environment, and the both are combined so as to change waste into wealth, conserve energy, reduce emission, reduce impounded surface water in a rainy day, supplement ground water, and reduce the urban heat island effect. The preparation method is simple, efficient, green and environment-friendly and suitable for reconstructing and constructing of roads in urban residential districts.

Description

technical field [0001] The invention relates to a sand-free recycled aggregate permeable concrete used for residential roads and a configuration method, especially suitable for the configuration and construction of the residential road permeable concrete, and belongs to the green building construction technology of civil engineering. Background technique [0002] A large amount of construction waste is generated in the process of building demolition. How to turn waste into treasure and use it nearby is of great significance for energy saving, emission reduction, dust and environmental pollution reduction. Recycled concrete can be prepared from recycled aggregates formed by simple processing and screening of concrete components removed in buildings. In residential roads, ordinary road concrete or asphalt concrete was widely used in the past. In rainy days, due to the poor water permeability of road concrete, water is easy to accumulate on the ground, which affects pedestrian...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B18/16
CPCY02A30/60Y02W30/91
Inventor 王军强
Owner JIANGSU VOCATIONAL INST OF ARCHITECTURAL TECH
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