Preparation process of cement-based muck concrete

A concrete product and cement-based technology, which is applied in the fields of concrete preparation and cement-based slag concrete preparation technology, can solve the problems of high production cost of grinding slag, difficulty in recycling construction slag, etc. Significant social and economic benefits, high-intensity effects

Inactive Publication Date: 2018-08-24
TIANJIN CHENGJIAN UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] Common construction slag, such as cement-based slag concrete, is processed by grinding the slag into powder and then mixing it with other ingredients for improvement and reuse. However, the production cost of grinding slag is very high, and the construction slag The reuse of

Method used

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  • Preparation process of cement-based muck concrete

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Embodiment 1

[0028] Material standard:

[0029] Cement is not lower than P.O42.5; water reducing agent is 35%;

[0030] The fineness modulus of sea sand is 2.9; the bulk density is 1360kg / m 3 ;The apparent density is 2690kg / m 3 ;

[0031] The particle size of the stone is 5-25mm, and the bulk density is 1451kg / m 3 , the apparent density is 2680kg / m 3 .

[0032] The untreated waste construction dregs in Xiqing District, Tianjin were taken, and the materials were selected according to the mass ratio. Cement: muck: water: sand: gravel is 1:0.1:0.4:2.2:3.2, and the amount of water reducing agent is 0.7% of the total mass of cement and muck. The water-cement ratio is 0.4.

[0033] Put the water and the construction waste slag collected on site into the mixer B, and stir for 2 minutes at the speed of 240r / min to obtain the slag slurry.

[0034] Take another mixer A, put stones and sand into it, mix well; transfer 1 / 2 of the muck slurry in mixer B to mixer A, and stir for 1 minute; then a...

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Abstract

The invention discloses cement-based muck concrete which is prepared from abandoned building muck, cement, stones, sand, water and water reducing agents. The mass percent of the cement, the muck, thewater, the sand and the stones is 1:0.1:0.4:2.2:3.2, the dosage of the water reducing agents accounts for 0.7% of the sum of the masses of the cement and the muck, and water-cement ratio is 0.4. For the purpose of consuming abandoned project muck, the abandoned project muck replaces part of the cement, the cement-based muck concrete with excellent strength is prepared by reasonable combination ofcompositions and scientific improvement of a process, and compressive strength is improved by about 8%-10% as compared with that of a traditional stirring mode.

Description

technical field [0001] The invention relates to a concrete preparation technology, in particular to a cement-based muck concrete preparation technology, which belongs to the technical field of building materials. Background technique [0002] Construction slag generally refers to construction waste and engineering slag generated in the process of construction engineering, decoration engineering, restoration and maintenance projects. The hazards caused by slag include polluting road surfaces, air, water bodies, encroaching on land, and affecting landscapes, etc. . At present, the main treatment methods of construction waste are landfill and as road subgrade filler. However, there are still a large amount of construction waste slag abandoned because they cannot meet the backfill conditions, seriously affecting environmental safety and people's normal life. Realizing the transformation of waste from construction waste into treasure has very important practical significance fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B18/16
CPCC04B28/04C04B2201/50C04B14/068C04B14/02C04B2103/302C04B18/16Y02W30/91
Inventor 王海良赵于博荣辉张磊王雪平杨久俊
Owner TIANJIN CHENGJIAN UNIV
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