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Cement and sandy soil mortar prepared from engineering muck instead of natural sands, and preparation method and application thereof

A technology of engineering dregs and natural sand, which is applied in the field of building materials technology and resource utilization of construction waste, can solve the problems of low replacement rate of engineering dregs resource utilization methods, poor working performance, complicated process, etc., and achieve excellent working performance and mechanical properties, the reduction of grinding energy consumption, and the effect of reducing serious damage

Active Publication Date: 2019-05-07
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a formula and method for preparing cement sand slurry by replacing natural sand with engineering dregs, which can be used to solve the problems of low replacement rate, complex process, large energy consumption, and poor mechanical and working performance in existing engineering dregs resource utilization methods. Good and other questions

Method used

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  • Cement and sandy soil mortar prepared from engineering muck instead of natural sands, and preparation method and application thereof
  • Cement and sandy soil mortar prepared from engineering muck instead of natural sands, and preparation method and application thereof
  • Cement and sandy soil mortar prepared from engineering muck instead of natural sands, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) Preliminarily dry the obtained granite weathered soil, and then put it into an electric blast drying oven at 100°C to dry to constant weight;

[0045] (2) Sieve the dried granite weathered soil into three groups A, B, and C according to the particle size. 0.25mm-2.0mm, the particle size of granite weathered soil in Group C is greater than 2.0mm, discard Group A;

[0046] (3) Put the group C granite weathered soil obtained in step (2) into a high-speed grinder (motor speed is 35000-40000r / min), rotate and mix evenly, and grind 3 times with long and short superimposed blades, each grinding time is 6 Seconds, keep shaking during the grinding process, and vibrate evenly after each grinding;

[0047](4) Pour out the weathered granite soil in the grinder, and use square hole sieves with side lengths of 0.25 mm and 4.75 mm to sieve the ground group C granite weathered soil to obtain sieved granite Weathered soil, the particle size of the sieved granite weathered soil is ...

Embodiment 2

[0052] (1) Preliminarily dry the obtained granite weathered soil, and then put it into an electric blast drying oven at 105° C. to dry to constant weight;

[0053] (2) Sieve the dried granite weathered soil into three groups A, B, and C according to the particle size. 0.25mm-2.0mm, the particle size of granite weathered soil in Group C is greater than 2.0mm, discard Group A;

[0054] (3) Put the group C granite weathered soil obtained in step (2) into a high-speed grinder (motor speed is 35000-40000r / min), rotate and mix evenly, and grind 2 times with long and short superimposed blades, each grinding time is 8 Seconds, keep shaking during the grinding process, and vibrate evenly after each grinding;

[0055] (4) Pour out the weathered granite soil in the grinder, and use square hole sieves with side lengths of 0.25 mm and 4.75 mm to sieve the ground group C granite weathered soil to obtain sieved granite Weathered soil, the particle size of the sieved granite weathered soil ...

Embodiment 3

[0060] (1) Preliminarily dry the obtained granite weathered soil, and then put it into an electric blast drying oven at 110°C to dry to constant weight;

[0061] (2) Sieve the dried granite weathered soil into three groups A, B, and C according to the particle size. 0.25mm-2.0mm, the particle size of granite weathered soil in Group C is greater than 2.0mm, discard Group A;

[0062] (3) Put the group C granite weathered soil obtained in step (2) into a high-speed grinder (motor speed is 35000-40000r / min), rotate and mix evenly, and grind 3 times with long and short superimposed blades, each grinding time is 3 Seconds, keep shaking during the grinding process, and vibrate evenly after each grinding;

[0063] (4) Pour out the weathered granite soil in the grinder, and use square hole sieves with side lengths of 0.25 mm and 4.75 mm to sieve the ground group C granite weathered soil to obtain sieved granite Weathered soil, the particle size of the sieved granite weathered soil is...

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Abstract

The invention discloses a cement and sandy soil mortar prepared from engineering muck instead of natural sands, and a preparation method and an application thereof. The preparation method comprises the following steps: drying and grinding waste engineering muck taken from the construction site, sieving and mixing the dried and ground waste engineering muck to form reclaimed engineering muck, and adding the reclaimed engineering muck and natural sands into a mortar stirrer according to a certain ratio in order to form a sand mixture; pouring water and cement into the mortar stirrer, adding a part of the sand mixture and a part of a water reducing agent, and performing uniform stirring; and adding the remaining sand mixture and the remaining water reducing agent, and performing uniform stirring to prepare the cement and sandy soil mortar prepared from engineering muck instead of natural sands. The preparation method provided by the invention has the advantages of realization of full utilization of a large amount of the engineering waste much through a reasonable proportioning ratio of materials, saving of river sand resources, protection of the ecological environment, reduction of the production cost and the under the engineering muck treatment cost on the premise of ensuring excellent working performances and mechanical performances of the sandy soil mortar, and excellent economic and social benefits.

Description

technical field [0001] The invention relates to the fields of construction material technology and resource utilization of construction waste, in particular to a cement sand slurry prepared from engineering dregs instead of natural sand, a preparation method and application thereof. Background technique [0002] With the rapid development of my country's construction industry and infrastructure construction, a large amount of engineering slag has been produced in construction projects such as foundation engineering, underground engineering, and subway bridges. According to the survey, in the 10 years from 2008 to 2018, an average of 236 million tons of construction waste was accumulated without reasonable treatment in my country every year, and it was increasing at a rate of 10% year by year, the most common of which was granite weathered soil. The main treatment methods for construction dregs in my country are landfill, brick making and paving of roadbeds. However, these si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B14/361C04B2111/60C04B2103/302C04B24/2647C04B20/026C04B20/04C04B14/06C04B28/02C04B40/0046
Inventor 吴波曹慧璇
Owner SOUTH CHINA UNIV OF TECH
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