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A kind of early strength cement soil and its preparation method and application

An early-strength cement and cement technology, applied in the field of early-strength cement-soil and its preparation, can solve the problems that lime-soil is not waterproof, increases the overall construction cost, and the bearing capacity of lime-soil is not high.

Active Publication Date: 2022-02-18
THE QINGDAO ENG CO LTD OF CHINA RAILWAY NO 10 ENG GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the commonly used method of backfilling fertilizer tanks in engineering is to backfill with 2:8 lime soil and compact them in layers. The disadvantage of this method is that compaction equipment is required for layered compaction. For fertilizer tanks with narrow widths, large compaction machines cannot be used , only manual compaction can be used, resulting in low construction efficiency and delaying the construction progress; secondly, the bearing capacity of the compacted lime soil is not high, and this method is not suitable for special buildings that require a certain bearing capacity; in addition, Lime soil is not waterproof, resulting in a large amount of stagnant water in the fertilizer tank of the foundation pit, causing great additional pressure on the basement wall, and the underground structure of the building needs special waterproof treatment, which greatly increases the overall construction cost

Method used

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  • A kind of early strength cement soil and its preparation method and application
  • A kind of early strength cement soil and its preparation method and application
  • A kind of early strength cement soil and its preparation method and application

Examples

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preparation example Construction

[0034] The second aspect of the present invention provides the preparation method of described early-strength cement soil, comprising the steps of:

[0035] After the excavated earth is screened, the quick-setting anti-seepage agent, cement and water are mixed in proportion and mixed evenly to obtain the product.

[0036] The third aspect of the present invention provides the application of the early-strength cement soil in the backfilling of the foundation pit fertilizer tank.

Embodiment 1

[0038] Prepare early-strength cement soil according to the following ratio:

[0039] Water 23%; soil 69%; early cement soil quick-setting anti-seepage agent 1%; cement 7%.

[0040] The mass ratio of fly ash and water glass in the early cement-soil quick-setting anti-seepage agent is 90:10.

[0041] The soil excavated on site is screened and mixed with early-stage cement-soil quick-setting anti-seepage agent, ordinary Portland cement and an appropriate amount of water, and fully mixed with mechanical equipment to obtain early-strength cement with pumpable fluidity earth.

[0042]Compressive strength test: static pressure test and penetration test are adopted at the optimum water content, and the compaction degree is 96%.

Embodiment 2

[0044] The difference from Example 1 is that the mass ratio of fly ash to water glass in the early cement-soil quick-setting anti-seepage agent is 93:7.

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Abstract

The invention discloses an early-strength cement soil and its preparation method and application. The early-strength cement soil consists of the following components in parts by weight: 23-25 ​​parts of water, 65-75 parts of soil, and 0.5-0.5 parts of quick-setting anti-seepage agent 1 part, 5.5-7 parts of cement, wherein, the quick-setting anti-seepage agent is a mixed powder material of fly ash and water glass, and the mass ratio of fly ash and water glass is 90-95:5-10. Early-strength cement soil has high early strength, short curing time, fast construction period, strong fluidity and self-tightness, controllable construction quality, and good impermeability.

Description

technical field [0001] The invention relates to the field of civil engineering materials, in particular to an early-strength cement soil and its preparation method and application. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] With the rapid development of urbanization in our country, due to the limitation of urban land use, a large number of high-rise and underground space buildings are built, and the supporting foundation pits are dug deeper and deeper. At the same time, due to the complexity and sensitivity of building functions, coupled with the narrow construction space and complex construction environment, many problems have been brought to the foundation pit cons...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/50
Inventor 杨仲会刘士鹏谢永清董建平陶俊辉胡超张方敏董旭
Owner THE QINGDAO ENG CO LTD OF CHINA RAILWAY NO 10 ENG GRP CO LTD