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Moderately weathered argillaceous siltstone improved filler and preparation method thereof

A siltstone and argillaceous technology, applied in the field of filler preparation, can solve the problems of poor quality of improved backfill construction, failure to meet specification requirements, and high transportation costs, and achieve the effects of enhancing physical and mechanical properties, avoiding ecological environment pollution, and avoiding source difficulties.

Pending Publication Date: 2021-03-19
浙江华东工程咨询有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of purchasing conventional crushed stone filler often results in high construction costs due to high transportation costs and other issues
In terms of improved soil backfill, there are few existing studies on the improvement ratio of moderately weathered argillaceous siltstone, and due to the unreasonable ratio, the construction quality of the improved backfill is poor, and even does not meet the specification requirements

Method used

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Examples

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Embodiment Construction

[0031] The present invention will be further described below.

[0032] Moderately weathered argillaceous siltstone improved filler, a central city in East China is currently planning to build Shangcheng Avenue. This project is a major engineering project that vertically overlaps three lines of subway tunnels, pipe corridors and urban expressways. The subgrade backfill of this project uses moderately weathered argillaceous siltstone improved filler, which is prepared from the following raw materials:

[0033] Medium-weathered argillaceous siltstone fine aggregate, medium-weathered argillaceous siltstone coarse aggregate, crushed stone, cement, quicklime and water, the mass-number ratio of each material is: 180: (240-260): (180-220 ):(50-100):(60-100):(110-150);

[0034] The definition of the weathered argillaceous siltstone fine aggregate: particle size composition and corresponding mass content: the mass ratio of particle size greater than 2mm and less than 5mm is 30%, the ma...

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Abstract

The improved filler for the intermediary weathered argillaceous siltstone is characterized by being prepared from the following materials: intermediary weathered argillaceous siltstone fine aggregate,intermediary weathered argillaceous siltstone coarse aggregate, gravels, cement, quick lime and water. The mass part ratio of all the materials is 180:(240-260):(180-220):(50-100):(60-100):(110-150).The invention further provides a preparation method of the intermediary weathered argillaceous siltstone improved filler. The method can effectively overcome the defects of the conventional method for obtaining the backfill. The filler not only can improve the intermediary weathered argillaceous siltstone, but also is simple and feasible, convenient to operate and low in manufacturing cost.

Description

technical field [0001] The invention relates to a backfill, in particular to a moderately weathered argillaceous siltstone improved soil, which is suitable for roadbed backfill and belongs to the technical field of filler preparation. Background technique [0002] With the advancement of urbanization, the construction of roads between cities and towns has become more and more urgent. During the excavation of road foundation pits in a central city in East China, a large amount of moderately weathered argillaceous siltstone was encountered. Moderately weathered argillaceous siltstone is easy to disintegrate and soften when exposed to water, and its strength decreases rapidly, so it is not suitable to be directly used as roadbed filler. If a large amount of moderately weathered argillaceous siltstone produced by excavation can be rationally utilized, construction costs can be saved, environmental pollution caused by random stacking of excavated siltstone can be avoided, and was...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2111/0075C04B2111/00017C04B14/02C04B14/04C04B22/064
Inventor 俞建强李华威顾欣洋刘竞舟金威盛辉闫自海朱剑锋邱少锋
Owner 浙江华东工程咨询有限公司
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