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Peat soil solidifying agent based on replacement function and use method of peat soil solidifying agent

A displacement, peat soil technology, applied in the field of soil curing agent, civil and building materials, can solve the problems of violation of the reinforcement of peat soil foundation, the strength is difficult to meet the demand, the material consumption is high, and the soil stability can be improved and the mechanical occlusion effect can be improved. , the effect of strengthening the mechanical properties

Active Publication Date: 2019-10-18
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the conventional reinforcement technology is applied to peat soil, either it is difficult to meet the demand in terms of strength, or the amount of material is too high. These unsuitable and uneconomical results violate the original intention of strengthening the peat soil foundation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: a kind of peat soil solidifying agent based on displacement, comprises the material of following component: as A replacement component, calculates by the mass percent of the soil particle that does not contain water in the natural peat soil, the mechanism that displacement rate is 40% Sand, as B gelling and hardening component, 15% cement calculated by the mass percentage of the mixture after component A replacement, 10% phosphogypsum as the cement mass percentage of C active excitation component, 3% sodium sulfate, 1.5% sodium chloride and 100% water.

[0019] The cement is P.O 42.5 ordinary Portland cement, the machine-made sand is dry conventional fine aggregate with a particle size less than 2.36mm, and the main component of phosphogypsum is dry dihydrate gypsum CaSO 4 2H 2 O is industrial waste, sodium sulfate is dry analytically pure granules, and sodium chloride is dry analytically pure granules.

[0020] The above-mentioned using method based on ...

Embodiment 2

[0027] This embodiment is basically the same as Embodiment 1, the difference is that: the material comprising the following components: machine-made sand with a replacement rate of 40% as A replacement component, 30% cement as B gelling hardening component, and C as C Active active ingredient of 10% phosphogypsum, 3% sodium sulfate, 1.5% sodium chloride and 100% water.

[0028] Using the above-mentioned curing agent and method to cure peat soil with an organic matter content of 61.3%, a moisture content of 105.1%, a void ratio of 1.72, and a cohesion of 28.75kPa, the unconfined compressive strength measured by the test block for 28 days is 606kPa , cohesion is 357kPa.

Embodiment 3

[0030] This embodiment is basically the same as Embodiment 1, the difference is: the material comprising the following components: machine-made sand with a replacement rate of 40% as A replacement component, 45% cement as B gelling hardening component, and C as C Active active ingredient of 10% phosphogypsum, 3% sodium sulfate, 1.5% sodium chloride and 100% water.

[0031]Using the above-mentioned curing agent and method to cure peat soil with an organic matter content of 61.3%, a moisture content of 105.1%, a void ratio of 1.72, and a cohesion of 28.75kPa, the unconfined compressive strength measured by the test block for 28 days is 810kPa. , The cohesion is 353kPa.

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Abstract

The invention discloses a peat soil solidifying agent based on a replacement function and a use method of the peat soil solidifying agent, and belongs to the technical field of soil solidifying. The solidifying agent is prepared from raw materials: machine-made sand with a replacement rate being 40%-60% calculated according to the mass percentage of the water-free soil particles in natural peat soil, 15%-45% of cement calculated according to the mass of the peat soil after the replacement, 10% of phosphogypsum, 3% of sodium sulfate, 1.5% of sodium chloride and 100% of water which are calculated according to the mass of cement. The use method of the solidifying agent includes the steps that after the peat soil is replaced with the machine-made sand, the peat soil is solidified by adding other materials. According to the peat soil solidifying agent based on the replacement function and the use method of the peat soil solidifying agent, the mechanical properties of the peat soil can be significantly improved; the amount of cement required for solidifying the peat soil is reduced, a new way for the solidification of the peat soil with sand with environment-friendly benefits is createdthrough the utilization of the machine-made sand, and the environmental pollution caused by stacking of the peat soil is reduced due to the utilization of phosphogypsum; and the solidifying agent rawmaterials are easy to obtain, the use method is simple, the cost is low and certain environment-friendly and economic benefits are achieved.

Description

technical field [0001] The invention relates to the field of civil engineering and building materials, in particular to the technical field of soil curing agents, in particular to a replacement-based peat soil curing agent and its application method. Background technique [0002] Peat soil is a typical ultra-soft soil, and it also has the characteristic of high organic matter content which is different from ordinary soft soil. The structure of peat soil is loose, and has extremely high natural moisture content, void ratio and compressibility. At the same time, it has a small specific gravity, high thixotropic sensitivity, and its bearing capacity is lower than that of ordinary weak structural soil. It is defined in engineering as being "Problem soil" that causes severe foundation settlement and foundation instability. In the early stage of engineering construction, due to the many technical difficulties involved in the development of peat soil areas, and the operation and l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2111/00732C04B2201/50C04B14/06C04B22/144C04B22/147C04B22/124C04B18/24
Inventor 王志良王竟宇申林方丁祖德
Owner KUNMING UNIV OF SCI & TECH
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