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High polymer environment-friendly recycled concrete and preparation method thereof

A technology of recycled concrete and high polymer, applied in the field of concrete, can solve the problems of discrete recycled aggregates, increased concrete bleeding rate, poor compatibility between recycled aggregates and natural aggregates, etc., and achieves the effect of good consistency

Active Publication Date: 2021-11-16
深圳市永恒业混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • High polymer environment-friendly recycled concrete and preparation method thereof
  • High polymer environment-friendly recycled concrete and preparation method thereof
  • High polymer environment-friendly recycled concrete and preparation method thereof

Examples

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Embodiment 1

[0065] This embodiment discloses a high polymer environmentally friendly recycled concrete, which is made of concrete mixture, and the concrete mixture includes the following components:

[0066] 310kg of cement; 150kg of water; 215kg of recycled sand; 525kg of recycled crushed stone; 445kg of river sand; 1075kg of crushed stone; 50kg of fly ash; 110kg of slag powder; Accelerator 10kg.

[0067] This embodiment also discloses a preparation method of high polymer environment-friendly recycled concrete, comprising the following steps:

[0068] Step 1, crush 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 greater than 10mm, and add them to the jaw crusher for further crushing , and then screen out aggregates with a particle size of 5-10mm as recycled sand, and filter out aggregates with a particle size of 10-31.5mm as recycled...

Embodiment 2-3

[0074] The difference with embodiment 1 is:

[0075] The pressure control in the container in step 2 is 5MPa, and the consumption of each component of concrete mixture is different, and the consumption of each component of embodiment 1-3 is detailed 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, 4 kg of xanthan gum is replaced with 1 kg of sodium caseinate and 3 kg of starch.

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Abstract

The invention relates to the field of concrete, and particularly discloses high polymer environment-friendly recycled concrete and a preparation method thereof. The high polymer environment-friendly recycled concrete is prepared from a concrete mixture, wherein the concrete mixture comprises the following components: cement; water; regenerating coarse aggregate; natural coarse aggregate; coal ash; slag powder; a polycarboxylate superplasticizer; a viscosity modifier; paraffin; and a liquid accelerator which has the advantages that the bleeding rate and the strength performance are not easily influenced by the regenerated aggregate; in addition, the invention also discloses a preparation method of the high polymer environment-friendly recycled concrete, which comprises the following steps: step 1, crushing construction waste; step 2, pouring the liquid accelerator; step 3, coating paraffin; step 4, mixing the components to form the concrete mixture; and step 5, curing and forming to obtain the high polymer environment-friendly recycled concrete which has the advantage of being convenient to prepare.

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] As the construction industry develops faster and faster, 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 building materials. [0003] Recycled concrete generally refers to the new concrete prepared by crushing, cleaning and grading discarded concrete blocks, mixing them with grading in a certain proportion, partially or completely replacing natural aggregates such as sand and gravel, and then adding cement and water. [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 cru...

Claims

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Application Information

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Patent Type & Authority Applications(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
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