A kind of polymer environment-friendly recycled concrete and its preparation method

A technology of recycled concrete and high polymer, applied in the field of concrete, can solve the problems of discrete recycled aggregates, large difference in apparent density and increased concrete bleeding rate, etc., and achieve the effect of good consistency

Active Publication Date: 2022-06-10
深圳市永恒业混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above-mentioned related technologies, the inventors believe that since the discarded concrete blocks tend to have a large number of fine cracks during the crushing process, it is easy to cause the porosity of the recycled aggregate to be relatively large, so that the apparent density of the recycled aggregate is different from that of the natural aggregate. The large difference in apparent density makes recycled concrete prone to poor compatibility between recycled aggregates and natural aggregates during the preparation process, making recycled aggregates prone to discrete phenomena, resulting in increased bleeding rate of concrete. Therefore, there are still room for improvement

Method used

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  • A kind of polymer environment-friendly recycled concrete and its preparation method
  • A kind of polymer environment-friendly recycled concrete and its preparation method
  • A kind of polymer environment-friendly recycled concrete and its preparation method

Examples

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Embodiment 1

[0065] The present embodiment discloses a kind of high-polymer environmentally friendly recycled concrete, which is made of concrete mixing material, and the concrete mixing material includes components of the following qualities:

[0066] Cement 310kg; water 150kg; recycled sand 215kg; recycled gravel 525kg; river sand 445kg; gravel 1075kg; fly ash 50kg; slag powder 110kg; polycarboxylate superplasticizer 10kg; Accelerator 10kg.

[0067] The present embodiment also discloses a preparation method of high polymer environmentally friendly recycled concrete, comprising the following steps:

[0068] Step 1: Crushing construction waste, remove metal, wood, glass, plastic and other substances in construction waste through magnetic separation and manual sorting, and screen out waste concrete blocks with a particle size larger than 10mm, which are added to jaw crusher for further crushing , and then screen out aggregates with a particle size of 5-10mm as recycled sand, and screen out...

Embodiment 2-3

[0074] The difference from Example 1 is:

[0075] In step 2, the pressure in the container is controlled to be 5MPa, and the consumption of each component of the concrete mixture is different. The consumption of each component in Examples 1-3 is shown in Table 2, and the unit of the consumption of each component is kg.

[0076] Table 2

[0077]

[0078]

Embodiment 4

[0080] The difference from Example 3 is that: in step 4, 1 kg of sodium caseinate and 3 kg of starch are used to replace 4 kg of xanthan gum.

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Abstract

The invention relates to the field of concrete, and specifically discloses a high polymer environment-friendly recycled concrete and a preparation method thereof. The high polymer environment-friendly recycled concrete of the present invention is made of concrete mixture, and the concrete mixture comprises the following components: cement; water; recycled coarse aggregate; natural coarse aggregate; fly ash; slag powder; Water agent; viscosity modifier; paraffin; liquid quick-setting agent, has the advantages of bleeding rate and strength performance not easily affected by recycled aggregate; in addition, the invention also discloses a preparation method of high polymer environment-friendly recycled concrete , including the following steps: step 1, crushing construction waste; step 2, pouring liquid accelerator; step 3, coating paraffin; step 4, mixing components to form concrete mixture; step 5, curing and forming, that is, high polymer Environmentally friendly recycled concrete also has the advantage of easy preparation.

Description

technical field [0001] The invention relates to the field of concrete, in particular to a high-polymer environment-friendly recycled concrete and a preparation method thereof. Background technique [0002] With the rapid development of the construction industry, more and more construction waste is generated every day, and at the same time, more and more building materials need to be consumed every day. Therefore, in order to save resources, recycled concrete is usually used as the main material. building materials. [0003] Recycled concrete generally refers to the new concrete prepared by crushing, cleaning and grading waste concrete blocks, mixing them with grading in a certain proportion, replacing part or all of natural aggregates such as sand and gravel, and then adding cement and water. [0004] In view of the above-mentioned related technologies, the inventors believe that since the discarded concrete blocks are prone to a large number of micro-cracks during the crus...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C04B28/04C04B28/10C04B18/16C04B24/14C04B24/36C04B24/38
CPCC04B28/04C04B28/10C04B18/16C04B24/36C04B24/38C04B24/14C04B2111/00017C04B2201/50C04B14/068C04B18/12C04B18/08C04B18/142C04B2103/302C04B2103/12Y02W30/91
Inventor明邦泉余小兰潘珑云赵国卫钟佛明
Owner深圳市永恒业混凝土有限公司