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A ground reinforcement material and its preparation method and application

A foundation reinforcement and additive technology, applied in the field of building materials, can solve the problems of waste of resources, unreasonable utilization of resources, environmental and social hazards, etc., and achieves reduction of treatment costs, enhancement of unconfined compressive strength, and less environmental pollution. Effect

Active Publication Date: 2017-11-17
SHANGHAI BAOTIAN NOVEL BUILDING MATERIALS +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through years of research and development, a series of building material products have come out, but these used solid wastes are estimated to only account for 50% of the total waste, and the remaining waste will bring great harm to the environment and society. At the same time, some useful resources in these wastes cannot be rationally utilized, resulting in a great waste of resources.

Method used

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  • A ground reinforcement material and its preparation method and application
  • A ground reinforcement material and its preparation method and application
  • A ground reinforcement material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024]

[0025] The above components are fully stirred and mixed evenly.

[0026] Performance testing:

[0027] 1. Specimen strength and impermeability test:

[0028] Raw materials: According to the distribution characteristics of the foundation soil of general sites in Shanghai, three typical natural soils were selected and mixed with two cementing materials to process them into reinforced soil. Three typical natural soil types are: the ② layer of brownish-yellow silty clay, the ③1st layer of muddy silty clay and the ③2nd layer of sandy silt.

[0029] The two cementing materials are the foundation reinforcement material in this example and P42.5 ordinary silicate cement, the water-cement ratio is 0.45, and the addition amount is 13%.

[0030] Sample preparation: The unconfined compressive strength sample is prepared by using a split test mold with an inner wall size of A39.1mm in diameter and a height of h=80mm; the test piece for the penetration test uses an inner wall ...

Embodiment 2

[0055]

[0056]

[0057] The above components are fully stirred and mixed evenly.

[0058]Test: The soil foundation reinforcement material (B#) and 42.5 grade ordinary silicon cement (A#) in this example are used in the construction technology of three-axis mixing piles, the mixing amount is 20%, the water-cement ratio is 1.5, and the sinking speed is 0.5 , the lifting speed is 1.0, the flow rate is 327, and the test age is 28 days. The structural strength of A# and B# mixing piles is shown in the following table:

[0059]

[0060] It can be seen from the table that the structural strength of the mixing pile using soil foundation reinforcement materials is obviously higher than that of the mixing pile using 42.5 grade ordinary silicon cement, and the strength of the 20% cemented powder mixing pile is 20% The strength of ordinary silicon cement-soil mixing pile is about 1.94 times.

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Abstract

The invention relates to the technical field of building materials, in particular to a foundation reinforcement material. The foundation reinforcement material is composed of the following raw materials by weight percentage: 30-70% of slag micro-powder, 5-20% of steel slag micropowder, 5-20% of fly ash, 5-10% of a desulfurization by-product, 2-20% of cement, 0-4% of an additive A, and 0-4% of an additive B. According to the invention, the foundation reinforcement material is adopted as the soil solidification material, compared with traditional cement, the prepared test piece has significantly enhanced unconfined compressive strength and good impermeability, can completely replace cement, and can be applied to soil mass reinforcement. The raw materials adopted by the invention are all solid wastes of iron and steel, electric power and other industries, are green and environment-friendly. The processing process has extremely low energy consumption and small environmental pollution, is low in cost, and can effectively reduce the foundation treatment cost, and the economic benefit is obvious.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a foundation reinforcement material and its preparation method and application. Background technique [0002] In the foundation reinforcement of residences, workshops and cargo yards, the temporary enclosure structure and water-stop curtain of deep foundation pits, and the embankments of water conservancy projects, construction methods such as mixing piles and rotary grouting piles are commonly used. The soil is stirred to form a foundation structure with a certain strength, so as to improve the bearing capacity of the foundation and the performance of retaining soil and water. Lime or cement is often used as a solidification material in the base and subbase of road engineering, and in the silt-promoting projects of riverbank tidal flats to improve the bearing capacity of the foundation. However, the strength of reinforced soil formed by ordinary cement and lime is re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/02C04B18/14C04B18/08C04B22/14
CPCY02W30/91
Inventor 单卫良张沈裔李明波王振兴解子军朱敏涛李阳
Owner SHANGHAI BAOTIAN NOVEL BUILDING MATERIALS