Method for constructing roadbed and base course by construction waste

A construction waste and road base technology, applied in buildings, roads, roads, etc., can solve problems such as high mud content research, achieve the effects of improving the environment, reducing maintenance costs, and increasing strength

Inactive Publication Date: 2009-09-30
SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As for the muck waste with smaller particles in the construction waste, due to its high mud content, it cannot be used as a base material, so there are few studies.

Method used

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  • Method for constructing roadbed and base course by construction waste
  • Method for constructing roadbed and base course by construction waste
  • Method for constructing roadbed and base course by construction waste

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Embodiment Construction

[0021] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0022] Construction waste refers to bricks, concrete blocks, sand and lime soil at the demolition site. However, construction waste contaminated by harmful impurities such as radioactivity, sulfate, heavy metals, and chloride salts shall not be recycled. The invention mainly crushes and screens waste bricks, waste concrete, brick soil and other mixtures contained in construction wastes on site, and then adds a consolidating agent to consolidate them and use them as road subgrades, subbases and base materials.

[0023] The present invention does not make specific requirements on the particle size, liquid and plasticity index of various soils in engineering application, and various cohesive soils, sandy soils, silty soils, sand, stone chips, stone powder, organic matter content below 8%. Gravel soil, gravel soil, excavation waste concrete powder, etc. ...

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Abstract

The invention provides a method for constructing a roadbed and a base course by construction waste. The method is characterized by comprising the following steps that: A, waste ricks, waste concrete and mixture of bricks and soil are crushed on the spot, and are screened into four grades, namely rough grade, medium grade, fine grade and soil, wherein grain diameter of the rough grade is between 19 and 37.5 mm, grain diameter of the medium grade is between 4.75 and 19 mm, grain diameter of the fine grade is between 2.36 and 4.7 mm, and grain diameter of the soil is smaller than 2.36 mm; and B, the materials are mixed according to a proportion of sum of the rough grade, the medium grade and the fine grade in mass to the soil in mass of 4:6-6:4, and 40 to 60 grams of HEC cementing agent is added in 1,000 grams of the mixture to be used as the roadbed and a subbase course of a road and a base course material below secondary roads (including the secondary road). The method has the advantages: 1) sufficiently utilizing field materials; 2) improving the strength of a soil body; 3) prolonging the service life of the road, and reducing the maintenance cost; and 4) improving environment, and promoting development of circular economy of 'in-situ reclamation' of the construction waste.

Description

technical field [0001] The invention relates to the field of construction, in particular to a method for constructing roadbeds and bases by using construction waste. Background technique [0002] 1) The status of similar research abroad [0003] The "urbanization process" in foreign countries started relatively early, so the research on construction waste is relatively in-depth, and the recovery rate of construction waste is relatively high. Moreover, there are more favorable funds and policies for the treatment of construction waste, forming a set of norms for "construction waste recycling". The following is an example to illustrate the progress of research and application of construction waste in road engineering abroad. [0004] The technical specification for the use of road construction materials in Germany has clear regulations on adding waste bricks to the base material. The upper limit of the amount of dense and high-hardness waste bricks is 25% of the mass of the...

Claims

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Application Information

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IPC IPC(8): E01C3/00
Inventor 张胜叶奋郭灿华郑晨朱天同
Owner SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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