Grain graded screening method for roadbed fillers produced from construction waste

A technology for construction waste and roadbed filler, which is applied in the direction of analyzing materials, weighing materials, and testing the strength of materials by applying stable tension/pressure. , cost saving effect

Inactive Publication Date: 2016-07-20
刘庆国
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  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a screening method for particle gradation of roadbed filler produced by construction waste, to solve th

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment

[0036] The testing method is as follows:

[0037] The first step: crushing: the construction waste is mixed and crushed by the construction waste metering mixing and crushing machine. The length of the crushed construction waste is between 15-45mm, which meets the size standard of railway subgrade filler.

[0038] Step 2: Carry out particle grading, standard compaction, liquid plasticity, particle density, crushing value, firmness, needle flake and Los Angeles abrasion tests on the crushed material;

[0039] Particle Grading:

[0040] 1) The particle gradation test can measure the mass fraction of dry soil mass of each particle group in the soil to the total mass of the soil, and it is also one of the important indicators for judging soil A, B, C and other fillers.

[0041] Among them: Group A is high-quality filler; Group B is good filler.

[0042] A group of fillers includes rocks and coarse-grained soil; the rocks are divided into stones and gravels, and the coarse-graine...

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PUM

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Abstract

The invention discloses a grain graded screening method for roadbed fillers produced from construction waste. Grain gradation adopts a screening test which comprises the following steps: (a) uniformly blending a sample, carrying out cutting-down by using a quartering method, and weighing a specified sample; and (b) sieving the sample by a sieve with the pore size of 2mm, weighing the mass of the sample on the sieve, and pouring the sample on the sieve into an upper sieve of multiple layers of sequentially-stacked coarse sieves for sieve analysis; and pouring the sample passing through the sieve with the pore size of 2mm into an upper sieve of multiple layers of sequentially-stacked fine sieves, and carrying out sieve analysis on a vibrating sieving machine. By the testing method used by the screening method, the aims of effectively utilizing the construction waste, reducing cost and protecting the environment are achieved; in addition, the fillers produced from the construction waste according to different mixing proportions can separately serve as an A-group filler, a B-group filler and a C-group filler of a railway bed and particularly are used as the A-group filler; and the applicable range is wide, the production process is simple and convenient, factory buildings are not required to be constructed, the cost is low, and the construction waste can be sufficiently utilized, so that the method is environment-friendly and practical.

Description

technical field [0001] The invention relates to a screening method for particle gradation of roadbed filler produced from construction waste, and belongs to the technical field of environmental protection building materials. Background technique [0002] At present, our country is in the peak period of housing construction, and the area of ​​new buildings completed every year is greater than the sum of the areas of new buildings completed each year in developed countries. my country's urban and rural areas currently have a total construction area of ​​40 billion square meters, and it is estimated that by 2020, an additional construction area of ​​approximately 30 billion square meters will be added. The common treatment method of construction waste in our country is to recycle a small part, and most of the construction waste is transported to the suburbs or villages without any treatment, and is stacked in the open air or landfilled. This method of processing construction...

Claims

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Application Information

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IPC IPC(8): C04B18/16G01N3/08G01N5/00G01N11/12G01N9/00G01N17/00G01N15/00G01N3/56
CPCY02W30/91
Inventor 刘庆国
Owner 刘庆国
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