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Pervious concrete with waste concrete serving as aggregate and preparation method and application of pervious concrete

A waste concrete and permeable concrete technology, which is applied in the field of permeable concrete, can solve the problems of poor durability and poor mechanical strength of permeable concrete, and achieve the effects of improving mechanical properties, improving interface properties, and avoiding cracking

Active Publication Date: 2018-11-13
禹智环保科技(深圳)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process is simple, so the prepared pervious concrete generally has problems such as poor mechanical strength and poor durability

Method used

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  • Pervious concrete with waste concrete serving as aggregate and preparation method and application of pervious concrete
  • Pervious concrete with waste concrete serving as aggregate and preparation method and application of pervious concrete
  • Pervious concrete with waste concrete serving as aggregate and preparation method and application of pervious concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] According to the method of the aforementioned first step to the sixth step and the amount of raw materials shown in Table 1, firstly, the waste concrete is pretreated to remove steel bars, plastics, wood fibers and paper, etc.; the waste concrete after pretreatment is treated After crushing and sieving, coarse aggregate with a particle size of 4-15mm and fine aggregate with a particle size of less than 4mm are obtained; the coarse aggregate is washed with water to elute the dust on its surface, and the eluted dust and fine aggregate are added together Grinding and crushing in fly ash and coal gangue to obtain micron-sized powders with a particle size of less than 40 μm; soak the washed coarse aggregate in a 5% phosphoric acid pool for 30 minutes, then remove the coarse aggregate and drain. Then add sodium silicate for thorough mixing; pre-mix Portland cement, micron-sized powder, water, HG-FDN type water reducer, air-entraining agent, triethanolamine, glass fiber and epo...

Embodiment 2～3

[0055] Similar to Example 1, only the types and amounts of raw materials were changed as shown in Table 1 to prepare permeable concrete.

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Abstract

The invention discloses pervious concrete with waste concrete serving as aggregate and a preparation method and application of the pervious concrete. The pervious concrete is prepared by steps: subjecting pretreated waste concrete to crushing and screening to obtain coarse aggregate and fine aggregate; soaking the coarse aggregate into acid solution, taking out, draining to dry, and adding sodiumsilicate or sodium metasilicate for surface modification; subjecting the fine aggregate, coal ash and coal gangue to smashing and grinding to obtain micron powder; premixing Portland cement, the micron powder, water, additives and a reinforcing agent, adding the modified coarse aggregate, and mixing to form the pervious concrete with waste concrete serving as aggregate. Interfacial properties of the coarse aggregate are improved, the coarse aggregate of the waste concrete and cement form a mechanical network, mechanical properties of the pervious concrete are improved, and durability and mechanical properties of concrete are improved by adjustment of component types and contents of the pervious concrete.

Description

technical field [0001] The invention relates to the technical field of concrete recycling, in particular to permeable concrete using waste concrete as aggregate, its preparation method and application. Background technique [0002] With the rapid development of economy and urbanization, most cities in my country are in the process of demolition of old buildings, cleaning of old roads, construction of new buildings, and laying of new roads. Therefore, without any treatment, a large amount of construction waste is transported to the suburbs or around the city for simple landfill or open-air stacking, which not only wastes land and resources, but also pollutes the environment; Larger and larger, a large number of sand and gravel mining has caused great damage to the natural environment. Therefore, using recycled concrete as aggregate is of great significance for saving resources, protecting the environment and realizing the sustainable development of buildings. [0003] Urban...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B38/00C04B20/02E01C11/22C04B18/16
CPCC04B20/023C04B28/04C04B2201/50E01C11/226C04B18/12C04B18/08C04B18/16C04B20/008C04B24/122C04B14/42C04B24/281C04B2103/302C04B24/34C04B22/062C04B22/068C04B22/08C04B38/0041C04B24/226C04B24/2623C04B24/2652C04B16/0633C04B24/302Y02W30/91
Inventor 董鹏飞黄静柯
Owner 禹智环保科技(深圳)有限公司
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