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Pervious concrete of recycled aggregate and preparation method thereof

A technology for recycling aggregate and concrete, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc. Good development prospects, simple and easy-to-understand preparation process, and the effect of reducing production costs

Active Publication Date: 2014-09-10
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the process of urbanization is accelerating, and more and more impermeable hard roads block the return of rainwater, and groundwater cannot be effectively replenished, which intensifies the crisis of water resources, even leads to abnormal climate, and destroys the ecological balance.

Method used

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  • Pervious concrete of recycled aggregate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: Taking the case where the recycled aggregate content is 50% as an example, the recycled aggregate permeable concrete was prepared.

[0028] (1) Prepare raw materials: ordinary Portland cement with a strength grade of 42.5; ordinary silica powder, the dosage is 6% of the cement mass; ordinary drinking water; Recycled crushed stones, the performance indicators of which basically meet the standards for Class II stones, are manually screened, rinsed with water, stacked separately, and air-dried naturally.

[0029] (2) Determination of the basic physical properties of coarse aggregate data are shown in Table 1:

[0030] Table 1 Basic physical performance data of coarse aggregate

[0031] Gravel category Single Grain Grading (mm) Mud content (%) Crushing index (%) Moisture content (%) Water absorption (%) Porosity (%) Natural bulk density (kg / m 3 ) Tap density (kg / m 3 ) Apparent density (kg / m 3 ) natural 16～19 1.2 14.2 1.0 ...

Embodiment 2

[0039] Example 2: Taking the case where the recycled aggregate content is 0% as an example, the recycled aggregate permeable concrete was prepared.

[0040] Except for the mixing ratio, others are the same as Example 1. The design mix ratio of 1 cubic meter of concrete is as follows: mass of coarse aggregate: mass of cement: mass of water: mass of silica fume = 1641.50kg: 427.24kg: 147.74kg: 27.27kg.

[0041]

Embodiment 3

[0042] Example 3: Taking the case where the recycled aggregate content is 100% as an example, the recycled aggregate permeable concrete was prepared.

[0043] Except for the mixing ratio, others are the same as Example 1. The design mix ratio of 1 cubic meter of concrete is as follows: mass of coarse aggregate: mass of cement: mass of water: mass of silica fume = 1529.78kg: 402.54kg: 173.58kg: 25.69kg.

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Abstract

The invention discloses pervious concrete of recycled aggregate and a preparation method thereof, and belongs to the technical field of pervious concrete of recycled aggregate. The pervious concrete of the recycled aggregate comprises the following components by mass percent: 71.77-73.16% of coarse aggregate, 18.88-19.04% of cement, 6.58-8.14% of water and 1.21-1.22% of silica fume, wherein the recycled aggregate and the natural aggregate accord with the stone utilization standard II, the mixing amount of the recycled aggregate can be customized according to the actual performance index, the cement is 42.5-level ordinary portland cement, and the mixing amount of the silica fume is 6% of the dosage of a binding material. The preparation method comprises the following steps: agitating, vibrating, molding and floating. The mix proportion is designed by adopting a volume process, and the concrete is prepared according to the scheduled preparation process. By adopting the pervious concrete of the recycled aggregate, on the one hand, the problem of recycling of the waste concrete can be solved, on the other hand, underground water can be effectively supplied, collected and purified, and water resources are repeatedly utilized, so as to relieve the 'heat island effect'.

Description

technical field [0001] The patent of the present invention relates to the field of recycled aggregate permeable concrete. Specifically, a designed mix ratio of recycled coarse aggregate, cement, silica fume and water is used to partially or completely replace natural coarse aggregate, and according to a predetermined preparation process, a kind of Recycled aggregate permeable concrete that can satisfy both mechanical properties and water permeability. Background technique [0002] On the one hand, "water" is the source of life and the foundation of human existence. However, the shortage of water resources and the pollution of water environment have become global problems that threaten human development. In recent years, with the rapid development of my country's economy, the groundwater has been seriously overexploited, and ground subsidence has occurred in some areas. At the same time, the process of urbanization is accelerating, and more and more impermeable hard roads bl...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B18/16
CPCY02W30/91
Inventor 杨鼎宜朱金春张晓欢张佩玲
Owner YANGZHOU UNIV
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