A kind of method adopting emulsified asphalt to solidify saline soil

A technology for emulsified asphalt and saline soil, which is applied in the field of using emulsified asphalt to solidify saline soil, can solve the problems of poor water resistance, low flexural and compressive strength of saline soil, and poor volume stability, and achieves improved mechanical properties and water resistance. The effect of broadening the utilization of resources

Inactive Publication Date: 2019-01-25
TIANJIN CHENGJIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, saline soil has disadvantages such as low flexural and compressive strength, poor water resistance, and poor volume stability, which limit the application of saline soil in building materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A kind of method adopting emulsified asphalt solidification saline soil, comprises the following steps:

[0016] (1) Preparation of emulsified asphalt: Prepare an aqueous solution of dodecyltrimethylammonium bromide, heat up to 95°C, slowly add molten asphalt, and control the mass ratio of asphalt to dodecyltrimethylammonium bromide to 100:7, high-speed stirring for 10 minutes to prepare emulsified asphalt, the solid content of emulsified asphalt is 50%;

[0017] (2) Saline soil solidification: add cement and emulsified asphalt to the saline soil, control the mass ratio of saline soil: cement: emulsified asphalt to 100:12:13, stir well, inject into the mold to form, after demoulding Natural conservation, the preparation of saline soil blocks.

[0018] In order to verify the performance of the saline soil block prepared in Example 1, the flexural strength, compressive strength and water absorption were tested. The test results show that the 28-day compressive strength ...

Embodiment 2

[0020] A kind of method adopting emulsified asphalt solidification saline soil, comprises the following steps:

[0021] (1) Preparation of emulsified asphalt: Prepare an aqueous solution of dodecyltrimethylammonium bromide, heat up to 95°C, slowly add molten asphalt, and control the mass ratio of asphalt to dodecyltrimethylammonium bromide to 100:4, high-speed stirring for 10 minutes to prepare emulsified asphalt, the solid content of emulsified asphalt is 50%;

[0022] (2) Saline soil solidification: add cement and emulsified asphalt to the saline soil, control the mass ratio of saline soil: cement: emulsified asphalt to 100:10:12, stir well, inject into the mold to form, after demoulding Natural conservation, the preparation of saline soil blocks.

[0023] The test results show that the 28-day compressive strength of the saline soil block in Example 2 is 6.8 MPa, the 28-day flexural strength is 2.7 MPa, and the water absorption rate is 7.5%.

Embodiment 3

[0025] A kind of method adopting emulsified asphalt solidification saline soil, comprises the following steps:

[0026] (1) Preparation of emulsified asphalt: Prepare an aqueous solution of dodecyltrimethylammonium bromide, heat up to 95°C, slowly add molten asphalt, and control the mass ratio of asphalt to dodecyltrimethylammonium bromide to 100:7, high-speed stirring for 10 minutes to prepare emulsified asphalt, the solid content of emulsified asphalt is 50%;

[0027] (2) Saline soil solidification: add cement and emulsified asphalt to the saline soil, control the mass ratio of saline soil: cement: emulsified asphalt to 100:15:20, fully stir evenly, inject into the mold to form, after demoulding Natural conservation, the preparation of saline soil blocks.

[0028] The test results show that the 28-day compressive strength of the saline soil block in Example 2 is 10.2 MPa, the 28-day flexural strength is 4.1 MPa, and the water absorption rate is 4.5%.

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Abstract

The invention relates to a method for solidifying saline soil through emulsified asphalt. The method comprises the following steps of 1 emulsified asphalt preparation, wherein an aqueous solution of dodecyl trimethyl ammonium bromide is prepared, the temperature is increased to 95 DEG C, asphalt in the molten state is added slowly, the mass ratio of the asphalt to dodecyl trimethyl ammonium bromide is controlled to be 100: (3-10), high-speed stirring is conducted for 5-10 min, the emulsified asphalt is obtained, and the solid content of the emulsified asphalt is 50%; 2 saline soil solidifying, wherein cement and the emulsified asphalt are added into the saline soil, the mass ratio of the saline soil to the cement to the emulsified asphalt is controlled to be 100:(5-15):(10-20), sufficient stirring is conducted to be uniform, the materials are injected into a mold for molding, after demolding is conducted, natural maintenance is conducted, and saline soil building blocks are obtained. According to the method, the emulsified asphalt and the cement are adopted for solidifying and modifying the saline soil, the mechanical property and water resistance of the saline soil building blocks can be improved, the saline soil can be used for a raw material of building products, and the recycling way of the saline soil is widened.

Description

technical field [0001] The invention belongs to the field of curing and modification of saline soil, and relates to a method for curing saline soil with emulsified asphalt. Background technique [0002] Saline soil is a general term for alkaline soil, saline soil and various alkalized and salinized soils. After the salt in saline soil is dissolved in water, various physical and mechanical properties of the soil will change. When the temperature or humidity changes, the foundation will expand or shrink in volume, which will cause damage to buildings and ground facilities. [0003] The use of saline soil needs to be modified. At present, after many years of improvement and utilization of saline soil in my country, researchers have summarized "adjust measures to local conditions, comprehensive management", "combination of water conservancy engineering measures and agricultural biological measures", "removal of salt and A series of principles and guidelines such as "combining im...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C04B24/36C04B20/02
CPCC04B20/023C04B24/36C04B28/00C04B2201/50C04B14/361
Inventor 廖晓兰张宝行
Owner TIANJIN CHENGJIAN UNIV
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