Method for regenerating waste solid for use in road foundation

A technology of road base and solid objects, which is applied in roads, roads, buildings, etc., can solve the problems of polluting the environment, wasting garbage and transportation fees, etc., and achieve the effect of reducing pollution and helping to protect the environment

Inactive Publication Date: 2008-09-17
沧州市市政工程公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This not only takes up land resources, but also causes serious pollution to the environment, and wast

Method used

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  • Method for regenerating waste solid for use in road foundation
  • Method for regenerating waste solid for use in road foundation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Recycled construction waste waste concrete blocks and waste bricks are used as raw materials, and after being crushed by a crusher and separated by a magnetic separator, it becomes a continuously graded recycled graded solid material with a particle size of 0-30mm.

[0024] See the following table for the specific particle gradation of recycled grade solid materials:

[0025]

[0026] The crushing value of the obtained regenerated graded solid material is 33.4%. Among the regenerated graded solid materials with a particle size above 0.5mm, the content of waste concrete blocks accounts for 52.2%, the content of waste bricks accounts for 47.8%, and the content of waste bricks accounts for 47.8%. The plasticity index of fine-grained soil is 8.1.

[0027] After testing, the recycled graded solid material complies with "Technical Specifications for Construction of Highway Pavement Base" (JTJ 034-2000), "Code for Design of Highway Asphalt Pavement" (JTG D50-2006), "Constru...

Embodiment 2

[0030] Lime, fly ash, and cement components were mixed in the same regenerated graded solid material as in Example 1.

[0031] The effective CaO+MgO used in the lime is 56.8% grade III slaked lime.

[0032] The fly ash with the indicators listed in the table below is adopted for the fly ash:

[0033] indicators

Loss on ignition

(%)

loose square density

(Kg / m 3 )

SiO 2

(%)

Al 2 o 3

(%)

Fe 2 o 3

(%)

CaO

(%)

MgO

(%)

SO 2

(%)

detection value

8.44

680

47.55

32.48

5.44

2.67

0.75

0.45

[0034] Fly ash fineness: 0.3mm sieve through the mass percentage of 100%; 0.15mm sieve through the mass percentage of 99.2%; 0.075mm sieve through the mass percentage of 88.2%.

[0035] The cement adopts 32.5MPa retarded cement, and the initial setting time of the cement is more than 3 hours and the final setting time is more than 6 ho...

Embodiment 3

[0039] Using construction waste containing waste concrete blocks, waste bricks, waste tiles, and waste gravel as raw materials, after being crushed by the RM80 type stone crusher and separated by a magnetic separator, it becomes a continuously graded regeneration with a particle size of 0-30mm grade solid materials.

[0040] The specific particle gradation of the recycled graded solid material is shown in the table below:

[0041]

[0042] The crushing value of the obtained regenerated graded solid material is 28.4%. Among the regenerated graded solid materials with a particle size above 0.5 mm, the content of waste concrete blocks accounts for 62.7%, the remaining waste bricks account for 13.2%, and the content of waste tiles accounts for 21.6%, the waste gravel content accounts for 2.5%, and the plasticity index of fine-grained soil below 0.5mm in the material is 6.8.

[0043] Mix cement and fly ash into the above-mentioned regenerated graded solid material, mix the regene...

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Abstract

A method of recycling the solid waste in road base engineering belongs to the technology field of waste recycling, and solves the problem of the solid waste recycling. The method includes: using waste concrete blocks, waste bricks, waste tiles and waste stones of the solid waste as the major material, crushing into pieces by a crusher, separating the metal substances by a magnetic separator, obtaining two major categories of recycling gradation solid material with granule diameters of 0-30mm and 0-70mm respectively conform to the granule continuous gradation. The recycling gradation solid material with the granule diameter of 0-30mm can be directly used as the base of a road pavement water permeable pavior brick, the packing of a subgrade bedding layer and the filling/exchanging reinforcing material of a soft soil subgrade; the recycling gradation solid material with the granule diameter of 0-70mm can be directly used as the packing of road engineering subgrade stone column replacement. The recycling gradation solid material can be blended with flyash, lime, carbide slag and cement to form different subgrade materials. The advanced method makes full use of the resources, and is applicable to recycling all solid waste into recycling gradation solid material and further to the road construction, which offers a promising prospect of popularization.

Description

technical field [0001] The invention belongs to the technical field of waste utilization, a method for regenerating waste solids and using them for road bases. Background technique [0002] With the rapid development of the world economy, especially the increasing progress in the comprehensive utilization of waste resources, the technical requirements for the recycling of waste solids are becoming more and more urgent. In the known technology, the existing waste solids such as waste bricks, waste tiles, waste stones, waste concrete blocks, etc., are mainly used to fill the building foundation and then compacted, and most of them are transported to the suburbs and villages for open-air stacking. deep landfill etc. This not only takes up land resources, but also causes serious environmental pollution, and wastes garbage removal and transportation costs, especially burying hidden dangers for future generations. Therefore, the recycling of waste solids is a difficult problem t...

Claims

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Application Information

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IPC IPC(8): E01C3/00
Inventor 吴英彪张秀丽郭艳芳
Owner 沧州市市政工程公司
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