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Soft soil foundation curing agent prepared from industrial waste residues

A technology of industrial waste and soft soil foundation, which is applied in the field of soft soil foundation treatment, to reduce engineering costs, solve the shortage of cement, and improve the unconfined compressive strength

Inactive Publication Date: 2019-08-02
TANGSHAN IND VOCATIONAL TECHN COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] With the development of urbanization and the improvement of environmental protection requirements, the use of cement-based solidification materials to strengthen soft soil foundations in my country's coastal, river and Yanjiang areas has been unable to meet the needs of the society. Looking for a new type of composite Green environmental protection materials have become a hot research topic as soft soil curing agent

Method used

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  • Soft soil foundation curing agent prepared from industrial waste residues
  • Soft soil foundation curing agent prepared from industrial waste residues
  • Soft soil foundation curing agent prepared from industrial waste residues

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Firstly prepare a muddy curing agent, its components include cement 30%, slag 25%, desulfurization gypsum 14.5%, aluminum slag 2%, fly ash 28%, sodium hydroxide 0.5%, named RTGHJ1.

[0033] Add 9% curing agent to the three soil samples with water content w of 65%, 75% and 85% respectively, mix and stir evenly to obtain the solidified soil specimen. Put the sample into a plastic fresh-keeping bag after being sprinkled with water and wet it. As for the standard curing indoor curing, the curing temperature is controlled at about 25 degrees, the relative humidity is greater than or equal to 95%, and the curing is measured for 7 days until the required age. , Unconfined compressive strength at 28d age, as shown in Table 3.

[0034] Table 3. Unconfined compressive strength of RTGHJ1 under different water contents

[0035] age W＝65％ W＝75％ W＝85％ 7d 336kpa 303kpa 285kpa 28d 382kpa 358kpa 324kpa

Embodiment 2

[0037] First prepare the muddy curing agent, its components include cement 35%, slag 25%, desulfurization gypsum 14.5%, aluminum slag 2%, fly ash 23%, sodium hydroxide 0.5%, named RTGHJ2.

[0038] Add 9% curing agent to the three soil samples with water content w of 65%, 75% and 85% respectively, mix and stir evenly to obtain the solidified soil specimen. Put the sample into a plastic fresh-keeping bag after being sprinkled with water and wet it. As for the standard curing indoor curing, the curing temperature is controlled at about 25 degrees, the relative humidity is greater than or equal to 95%, and the curing is measured for 7 days until the required age. , Unconfined compressive strength at 28d age, as shown in Table 4.

[0039] Table 4. Unconfined compressive strength of RTGHJ2 at different water contents

[0040] age W＝65％ W＝75％ W＝85％ 7d 340kpa 313kpa 289kpa 28d 381kpa 376kpa 331kpa

Embodiment 3

[0042] Firstly prepare a muddy curing agent, its components include 40% cement, 24% slag, 11% desulfurized gypsum, 2% aluminum slag, 20% fly ash, 3% sodium hydroxide, named RTGHJ3.

[0043] Add 9% curing agent to the three soil samples with water content w of 65%, 75% and 85% respectively, mix and stir evenly to obtain the solidified soil specimen. Put the sample into a plastic fresh-keeping bag after being sprinkled with water and wet it. As for the standard curing indoor curing, the curing temperature is controlled at about 25 degrees, the relative humidity is greater than or equal to 95%, and the curing is measured for 7 days until the required age. , Unconfined compressive strength at 28d age, as shown in Table 5.

[0044] Table 5. Unconfined compressive strength of RTGHJ3 under different water contents

[0045] age W＝65％ W＝75％ W＝85％ 7d 558kpa 532kpa 503kpa 28d 605kpa 598kpa 551kpa

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Abstract

The invention relates to the field of soft soil foundation hardening, in particular to a soft soil foundation curing agent prepared from industrial waste residues. The advantage that industrial residues are cheap is sufficiently used, and both the problem in treating industrial wastes and the problem in treating soft foundations of sludge soft clay can be solved; in addition, the curing agent provided by the invention is good in early strength, good in application and good in water stability and is capable of remarkably alleviating the problems that sludge soft clay in littoral regions is highin water content and low in shearing resistance.

Description

technical field [0001] The invention relates to the technical field of soft soil foundation treatment, in particular to a soft soil foundation curing agent prepared from industrial waste residues. Background technique [0002] Weak foundation mainly refers to the composite foundation composed of free mud, free muddy soil, flush fill, miscellaneous fill or mixed with peat, shells, biological debris and other highly compressive soil layers. It has the characteristics of high moisture content, high compressibility, small cohesion, low shear strength and small consolidation coefficient. Under the action of external load, it takes a long time for compression and consolidation to be stable, and it will also produce large settlement and uneven deformation. Therefore, treatment measures are needed to improve the properties of the foundation soil, improve the mechanical properties of the foundation soil, and ensure that the buildings normal use. [0003] The mixing method is a comm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14
CPCC04B28/144C04B2201/50C04B2111/00732C04B7/02C04B18/141C04B18/144C04B18/08C04B22/062
Inventor 温欣张晓彬张东东赵巍平宋泽华陈晨高宇
Owner TANGSHAN IND VOCATIONAL TECHN COLLEGE
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