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Subgrade filling material produced from building construction waste and river sand and preparation method of subgrade filling material

A construction waste and subgrade filling technology, which is applied to buildings, roads, roads, etc., can solve the problems of slow progress in resource utilization of construction waste, siege of construction waste, complex processing technology, etc., to reduce natural resource consumption, rapid subsidence, and construction The effect of simple process

Active Publication Date: 2017-09-22
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing means of recycling construction waste have high technical requirements and complex processing techniques, which lead to slow progress in the recycling of construction waste and lead to the dilemma of construction waste besieging the city

Method used

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  • Subgrade filling material produced from building construction waste and river sand and preparation method of subgrade filling material
  • Subgrade filling material produced from building construction waste and river sand and preparation method of subgrade filling material
  • Subgrade filling material produced from building construction waste and river sand and preparation method of subgrade filling material

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Embodiment 1

[0064] The invention will be described in detail below in conjunction with specific embodiments and accompanying drawings. The roadbed filler disclosed by the present invention is composed of river sand mixed with construction waste, wherein the proportion of river sand is about 40%, and it is taken from the Yellow River in the northwest of Jinan. The embankment is a yellow-brown loose and non-sticky single-grain structure, with a specific gravity of about 2.66; construction waste accounts for about 60%, which is taken from the old village renovation project in Liuzhiyuan area of ​​Jinan City, and the main components are waste concrete soil blocks and waste bricks , The brick-concrete ratio is about 7:3, the water absorption rate is 5.347%, the particle specific gravity is about 2.71, and the crushing value is between 38.01% and 38.25%. The construction waste in the mixture can act as a skeleton as a coarse aggregate, and the river sand as a fine particle can be used to fill th...

Embodiment 2

[0078] The present invention also provides a preparation method of roadbed filler produced from construction waste and river sand, the specific process is as follows: figure 1 As shown, the details are as follows:

[0079] Step STEP1: The river sand selected in this example is taken from the Yellow River dam in the northwest of Jinan. It is a yellow-brown loose and non-sticky single-grain structure with a specific gravity of about 2.66 and a mud content of 3.25. The selected construction waste is taken from the Liuzhiyuan area of ​​Jinan City The main components of the old village renovation project are waste concrete clods and waste bricks. The brick-to-concrete ratio is about 7:3, the particle proportion is about 2.71, and the crushing value is between 38.01% and 38.25%. attached by figure 2 It can be seen from the gradation curve shown that the particle content of river sand with a particle size between 0.075 and 1.18 mm exceeds 90%, the mud content is about 3.2%, and the...

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Abstract

The invention relates to a subgrade filling material produced from building construction waste and river sand and a preparation method of the subgrade filling material. The subgrade filling material is made by mixing 60% of building construction waste and 40% river sand. The building construction waste mainly comprises waste concrete soil blocks and waste brick fragments and is taken as crude aggregate, which plays the function of a skeleton. The river sand has a loose non-viscous single-particle structure and is taken as fine aggregate, which is used for filling pores in the crude aggregate. The specific gravity of particles of building construction waste should be larger than that of particles of river sand. Compared with river sand, the subgrade filling material has obviously improved mechanical properties, the shear strength of the subgrade filling material is increased, the compacting performance of the subgrade filling material is improved, and the bearing capability of the subgrade filling material is improved. Compared with river sand, the subgrade filling material has obviously improved anti-liquefaction performance, and is free of risk of liquefaction. The mixture of river sand and building construction waste can be applied to subgrade backfill engineering. The subgrade filling material is simple in construction process, allows cyclic utilization of building construction waste to be promoted, and has less dependence on river sand resources. The subgrade filling material has great, economic, eco-friendly and social benefit.

Description

technical field [0001] The invention relates to the technical field of road engineering, in particular to a roadbed filler produced with construction waste and river sand as raw materials and a preparation method thereof. Background technique [0002] In subgrade backfilling projects, river sand is favored for its good water permeability, water stability and saturated water compaction, especially in areas with dense water networks, river sand is used as subgrade filler, which is not only convenient to obtain materials, saves costs, but also Can dredge the river and protect the cultivated land. However, the engineering performance of river sand varies significantly depending on the area where the materials are collected, and its dry stability is poor, and it is easy to slide and collapse due to water loss. In addition, unrestrained mining of river sand destroys the riverbed channel and also leads to the deterioration of river sand engineering performance and the shortage of ...

Claims

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Application Information

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IPC IPC(8): C04B30/00E01C3/00C04B111/10
Inventor 王广月李牧笛李盛听孙国瑞
Owner SHANDONG UNIV
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