Recycled concrete beneficial to improvement of impermeability and preparation method thereof

A technology of recycled concrete and impermeability, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc. It is not conducive to ensuring the quality of recycled concrete, and achieves the effect of ensuring reuse, reducing water use, and improving impermeability.

Inactive Publication Date: 2021-08-10
JINHUA VOCATIONAL TECH COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a kind of regenerated concrete and its preparation method that is beneficial to improve impermeability, to solve the above-mentioned background technology when the current preparation of regenerated concrete is not conducive to the preparation of concrete in batches quickly, and at the same time It is beneficial to ensure the quality of recycled concrete, not conducive to improving the impermeability of reinforced recycled concrete, and cannot ensure the good reuse of recycled concrete.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0028] The preparation method of the modified recycled coarse aggregate is as follows: crush and sieve the waste concrete, leave the waste concrete particles with a particle size of 5mm-25mm to fully soak and then dry them, and place the dried waste concrete particles in the silicon slag After fully soaking in the emulsion, add limestone powder and stir evenly, after stirring for 45min-60min, remove and dry to obtain modified recycled coarse aggregate;

[0029] Among them, the particle size of the modified recycled PET plastic particles is 0.4mm-1.2mm, and the preparation method of the modified recycled PET plastic particles is as follows: washing, crushing, drying and melt-extruding the waste plastics to form recycled PET plastics Particles, put recycled PET plastic particles, nano-scale glued powder accounting for 5%-10% of the mass fraction of recycled PET plastic particles, and a coupling agent accounting for 1%-5% of the mass fraction of recycled PET plastic particles in t...

Embodiment 1

[0033] When preparing recycled concrete, first crush and screen recycled waste concrete to 5mm-25mm and recycled waste plastic to 0.4mm-1.2mm for modification, and take modified recycled coarse bone according to the raw material formula 960 parts of raw materials and 95 parts of modified recycled PET plastic particles;

[0034] Then take 75 parts of fly ash, 210 parts of cement, 30 parts of slag powder and 320 parts of natural fine aggregate according to the corresponding raw material formula;

[0035] Take fly ash, cement, slag powder, recycled waste concrete and natural fine aggregate and add 1 / 3 of water into the mixing and stirring device, and mix and mix for 30 minutes; take modified recycled PET plastic particles, add and mix, and add 1 / 3 of water; Step 5: Take the water reducing agent, air-entraining agent, early strength agent and waterproofing agent and mix them with water in turn, then add to the mixing and stirring device;

[0036] Add the rest of the water and co...

Embodiment 2

[0038]When preparing recycled concrete, firstly take recycled waste concrete and crush and screen to 8mm-22mm and recycled waste plastics to crush and screen to 0.55mm-1.0mm for modification, and take the modified recycled coarse bone according to the raw material formula 850 parts of raw materials and 110 parts of modified recycled PET plastic particles;

[0039] Then take 80 parts of fly ash, 230 parts of cement, 35 parts of slag powder and 400 parts of natural fine aggregate according to the corresponding raw material formula;

[0040] Take fly ash, cement, slag powder, recycled waste concrete and natural fine aggregate and add 1 / 3 of water into the mixing and stirring device, and mix and mix for 30 minutes; take modified recycled PET plastic particles, add and mix, and add 1 / 3 of water; Step 5: Take the water reducing agent, air-entraining agent, early strength agent and waterproofing agent and mix them with water in turn, then add to the mixing and stirring device;

[0...

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Abstract

The invention discloses recycled concrete beneficial to improvement of impermeability and a preparation method of the recycled concrete. The recycled concrete is prepared from 50-90 parts of fly ash, 160-240 parts of cement, 25-45 parts of slag powder, 750-1100 parts of modified recycled coarse aggregate, 300-550 parts of natural fine aggregate, 90-120 parts of modified recycled PET (Polyethylene Terephthalate) plastic particles, 5-8 parts of an additive and water, the additive comprises a water reducing agent, an air entraining agent, an early strength agent and a waterproof agent, and the recycled concrete comprises the following components in parts by weight: 75 parts of fly ash, 210 parts of cement, 30 parts of slag powder, 960 parts of modified recycled coarse aggregate, 320 parts of natural fine aggregate, 95 parts of modified recycled PET plastic particles, 0.5 part of the water reducing agent, 1.6 parts of the air entraining agent, 7.5 parts of the early strength agent, 2.3 parts of the waterproof agent and water. According to the recycled concrete beneficial to improvement of impermeability and the preparation method thereof, batch and rapid preparation of the recycled concrete is facilitated, the quality of the recycled concrete is ensured, improvement of the impermeability of the recycled concrete is facilitated, and reutilization of the recycled concrete is ensured.

Description

technical field [0001] The invention relates to the technical field of recycled concrete, in particular to a recycled concrete which is beneficial to improve impermeability and a preparation method thereof. Background technique [0002] With the continuous development of society, various buildings and construction projects began to increase continuously. At the same time, some aging civil buildings, factory buildings, etc. need to be demolished and rebuilt, resulting in a large amount of construction waste, which contains a large amount of Abandoned concrete waste, in order to process concrete waste, different recycled concrete production methods proposed under the prior art; [0003] The recycled concrete under the background of the prior art, such as the Chinese invention patent application with the application publication number CN112174590A, proposes a preparation method of recycled concrete and recycled concrete, which belong to the technical field of concrete preparati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B20/10C04B18/20C04B111/27
CPCC04B28/00C04B20/107C04B18/20C04B2111/27C04B18/08C04B18/141C04B18/16C04B2103/302C04B2103/304C04B2103/14C04B2103/65C04B20/1055C04B20/026Y02W30/91
Inventor 李晓珍刘智武唐晶郑朝灿
Owner JINHUA VOCATIONAL TECH COLLEGE
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