Collapsible loess aggregate filling material

A collapsible loess and aggregate technology, applied in the field of collapsible loess aggregate filling materials, can solve the problems of adverse impact on the normal life of surrounding residents, large impact on the surrounding environment, a large amount of manpower and material resources, etc., and achieve the protection of the surrounding environment , Eliminate collapsibility and reduce permeability

Pending Publication Date: 2021-11-12
甘肃西部岩土工程有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Several commonly used treatment methods include replacement filling method, grouting method, compaction pile method, etc., but the above several treatment methods have the following disadvantages: (1) The construction period is long; (2) More equipment is required; (3) The construction process is relatively complicated; (4) It has a great impact on the su

Method used

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  • Collapsible loess aggregate filling material
  • Collapsible loess aggregate filling material
  • Collapsible loess aggregate filling material

Examples

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preparation example Construction

[0050] A kind of preparation method of collapsible loess aggregate filling material of the present invention comprises the following steps:

[0051] (1) Preparation of fine aggregate: sieve the fine aggregate to remove impurities in the fine aggregate;

[0052] (2) Coarse aggregate preparation: crush the coarse aggregate so that its particle size is between 2mm and 40mm;

[0053] (3) Aggregate moisture content measurement: the fine aggregate used in the present invention and coarse aggregate are carried out moisture content measurement;

[0054] (4) Weighing of raw materials: each component of the present invention is weighed according to the formulating ratio and the moisture content of fine aggregate and coarse aggregate;

[0055] (5) Stirring: place the weighed raw materials in the mixer and fully stir them to fully blend the various raw materials;

[0056] (6) Filling: Fill the fully stirred raw materials in the backfilling project.

Embodiment 1

[0058] The collapsible loess and red sandstone excavated from the foundation trench are used as the main material, and the curing agent is used as the secondary material. The curing agent is ordinary Portland cement, the cement strength grade is 42.5MPa, and the admixture is calcium sulfoaluminate Bulking agent. The aggregate is sent to the mixer, and at the same time, the curing agent, admixture and a certain proportion of water are mixed to form a slurry, which is also sent to the mixer. After the mixer is evenly stirred, the filling material with fluidity and a certain strength after hardening is formed. The composition material of the collapsible loess aggregate filling material in this embodiment 1 is: fine aggregate is collapsible loess, accounts for 65% of aggregate total amount; Coarse aggregate is red sandstone, accounts for 65% of aggregate total amount 35%; the dosage of curing agent is 8% of the aggregate; the dosage of water is 25% of the total mass of aggregate a...

Embodiment 2

[0060] The collapsible loess and red sandstone excavated from the foundation trench are used as the main material, and the curing agent is used as the secondary material. The curing agent is ordinary Portland cement, the cement strength grade is 42.5MPa, and the admixture is calcium sulfoaluminate Bulking agent. The aggregate is sent to the mixer, and at the same time, the curing agent, admixture and a certain proportion of water are mixed to form a slurry, which is also sent to the mixer. After the mixer is evenly stirred, the filling material with fluidity and a certain strength after hardening is formed. The composition material of collapsible loess aggregate filling material in this embodiment 2 is: fine aggregate is collapsible loess, accounts for 70% of aggregate total amount; Coarse aggregate is red sandstone, accounts for 70% of aggregate total amount 30%; the dosage of curing agent is 15% of the aggregate; the dosage of water is 25% of the total mass of aggregate and ...

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Abstract

The invention discloses a collapsible loess aggregate filling material, which is formed by jointly mixing aggregate, a curing agent, an additive and water, and the aggregate contains collapsible loess. The mixed filling material with the collapsible loess as the main body is provided by combining the raw materials such as the collapsible loess and the red sandstone which are common in northwest regions, and the mixed filling material is weak in shrinkage performance, low in consolidation settlement, free of collapsibility, low in permeability, capable of meeting the strength requirement and low in price in the backfilling process.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a collapsible loess aggregate filling material. Background technique [0002] In recent years, with the rapid development of economic construction in Northwest China, a large number of new buildings and structures have appeared, and in the construction process of buildings and structures, most of them adopt large-scale excavation construction measures, which requires large-scale excavation of the foundation trench after the construction is completed. The area is backfilled. The design of foundation trench backfill generally requires that the compaction coefficient of the backfill soil must be controlled above 0.93, but in actual engineering, due to the influence of factors such as the construction site, construction technology level, construction period, backfill soil quality, and weather changes, the backfill soil pressure The real coefficient does not meet the desig...

Claims

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Application Information

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IPC IPC(8): C04B28/04
CPCC04B28/04C04B14/361C04B14/02C04B22/14
Inventor 赵志潘朱彦鹏祁小力房光文金生莲杜晓涛杨作青吕玉宝吉海峰张志琦
Owner 甘肃西部岩土工程有限责任公司
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