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Pervious concrete prepared from recycled aggregate and preparation process of pervious concrete

A technology of permeable concrete and recycled aggregate, applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of low strength requirements, affecting the use range of recycled permeable concrete, and large porosity

Inactive Publication Date: 2019-11-22
ZHEJIANG YUEDA TRAFFIC ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, due to the characteristics of large crushing index, high water absorption, large porosity, and low apparent density of recycled aggregates, the strength and durability of recycled concrete are low, so it is often used in low-strength requirements, which affects the Application range of recycled permeable concrete

Method used

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  • Pervious concrete prepared from recycled aggregate and preparation process of pervious concrete
  • Pervious concrete prepared from recycled aggregate and preparation process of pervious concrete
  • Pervious concrete prepared from recycled aggregate and preparation process of pervious concrete

Examples

Experimental program
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Effect test

Embodiment 1

[0096] refer to figure 1 , which is a preparation process of permeable concrete prepared from recycled aggregate disclosed by the present invention, which includes the following preparation process:

[0097] 1) Preparation of purifying agent: after mixing 18% nano-titanium dioxide, 16% silver phosphate, 8% nano-zinc oxide, 3% sodium tripolyphosphate, 8% chitosan and 25% water, add 22% calcined hydrotalcite, soaked for 2 hours under vacuum pressure; after soaking, the calcined hydrotalcite was taken out, and then the calcined hydrotalcite was dried at 25°C to obtain a purifying agent;

[0098] The particle size of calcined hydrotalcite is 1-3mm;

[0099] Preparation of modified recycled aggregate:

[0100] S1: Pretreatment: Hammer the waste concrete blocks so that the diameter of the hammered concrete blocks is less than 50mm, and carry out moisture spraying treatment and epidemic prevention treatment on the waste concrete blocks;

[0101] S2: screening treatment: perform sc...

Embodiment 1

[0124] The difference between Embodiment 10-13 and Embodiment 1 is that the nutrient solution comprises the following raw materials in weight percentage:

[0125]

[0126]

[0127] The difference between Embodiment 14-17 and Embodiment 1 is that the first auxiliary agent includes the following raw materials in weight percentage:

[0128]

[0129] The difference between Embodiment 18-21 and Embodiment 1 is that the second auxiliary agent includes the following raw materials in weight percentage:

[0130]

[0131] The difference between Embodiment 22-25 and Embodiment 1 is that the scavenger comprises the following raw materials in weight percent:

[0132]

[0133] The difference between Embodiment 26-29 and Embodiment 1 is that the fibrous filler comprises the following raw materials in weight percent:

[0134]

[0135] The difference between Embodiment 30-33 and Embodiment 1 is that all the other admixtures include the following raw materials in weight perce...

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Abstract

The invention discloses pervious concrete prepared from recycled aggregate and a preparation process thereof, and relates to the technical field of concrete preparation, the pervious concrete is prepared from the following raw materials in parts by weight: 1000 to 1200 parts of modified recycled aggregate; 200 to 240 parts of cement; 100 to 120 parts of fly ash; 60 to 80 parts of mineral powder; 50 to 70 parts of a purifying agent; 30 to 50 parts of rubber powder; 20-40 parts of a fiber filler; 10 to 30 parts of redispersible latex powder; 3-7 parts of other additives; and 120-140 parts of water. The pervious concrete is prepared by modifying the recycled aggregate, so that the strength of the recycled aggregate is improved, and the application range of the pervious concrete is widened.

Description

technical field [0001] The invention relates to the technical field of concrete preparation, in particular to permeable concrete prepared from recycled aggregates and a preparation process thereof. Background technique [0002] With the rapid development of my country's economy, the demolition of old and new infrastructure has produced a large number of waste building materials, among which waste concrete accounts for about 30% of construction waste, except for a very small number of low-level materials that are recycled for non-load-bearing structures such as subgrades and bases. Most of them are landfilled or piled up, which pollutes the environment and wastes resources. [0003] Traditional pavement concrete materials lack the ability to absorb heat and infiltrate rainwater, making rainwater ineffective and polluting natural water bodies. Driving in rainy days is prone to "drifting", "splashing", "night glare" and other phenomena, and it will also increase the "heat islan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/02C04B20/12C04B20/02C04B18/16
CPCC04B20/02C04B20/12C04B28/02C04B2111/00017C04B2111/00284C04B2201/20C04B2201/50C04B18/16C04B18/08C04B18/12C04B18/22C04B2103/0057C04B14/06C04B22/16C04B14/30C04B24/38C04B14/041C04B14/303C04B14/48C04B14/46C04B16/0641C04B2103/302C04B2103/10C04B2103/50C04B20/1085C04B20/1077Y02W30/91
Inventor 俞艳朱虹俞敏
Owner ZHEJIANG YUEDA TRAFFIC ENG CO LTD
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