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Hexadecyl trimethyl ammonium bromide expansive soil improvement agent

A technology of cetyltrimethylamine bromide and modifier, applied in the field of geotechnical engineering, can solve problems such as expansion and shrinkage deformation and damage of expansive soil slopes, achieve improved engineering properties, strong adsorption capacity, simple and convenient construction Effect

Inactive Publication Date: 2006-10-25
HOHAI UNIV
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AI Technical Summary

Problems solved by technology

Effectively solve the problem of expansion and contraction deformation and failure of expansive soil slopes

Method used

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Examples

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Effect test

Embodiment

[0009] Improver preparation, taking the preparation of 1000ml improver as an example, the steps are as follows: (1) room temperature, 20°C; weigh 1.7g of slaked lime and let it dissolve in 1000ml of water at room temperature, the solubility of slaked lime at 20°C is 0.17g, Complete the preparation of saturated lime aqueous solution; (2) the dry soil quality that needs to improve soil body is 1000g, is 0.5% (hexadecyltrimethylammonium bromide quality: dry soil quality=0.5: 99.5) by weighing all Needed cetyltrimethylammonium bromide (CTMAB) 5.0g; (3) dissolve the weighed cetyltrimethylammonium bromide in saturated lime water.

[0010] The improvement construction steps are as follows: spray the prepared improver on the dry slope surface, spray the second time after the surface of the slope is dry, and then spray the third time after the surface of the slope is dry, and repeat the spraying for several times until Form the desired surface modification layer.

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PUM

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Abstract

The invention is a palmityl trimethyl ammonium bromide expansive soil modifier, characterized in comprising the preparing steps of: (1) at room temperature, preparing saturated lime water solution; (2) weighing the needed palmityl trimethyl ammonium bromide in the mass ratio of palmityl trimethyl ammonium bromide to dry soil = 0.5 : 99.5; (3) dissolving the palmityl trimethyl ammonium bromide in the saturated lime water solution, where it needs to notice that the dosage of the saturated lime water solution is able to completely dissolve the palmityl trimethyl ammonium bromide. And the advantages: making the soil property still able to reach the specified standard under the water influence; improving engineering property of expansive soil; unable to cause environmental pollution. And its construction method uses osmotic modification principle and fully uses multi-crack property of expansive soil and is simple and convenient.

Description

technical field [0001] The invention relates to an expansive soil modifier, in particular to a hexadecyltrimethylammonium bromide expansive soil modifier which reduces the expansion and shrinkage of expansive soil. It belongs to the technical field of geotechnical engineering. Background technique [0002] At present, the physical methods to prevent the instability of expansive soil slopes are: (1) Surface water protection: setting up various drainage ditches and establishing a surface drainage network system, so that surface water is not easy to seep into the soil slope; (2) Slope protection, currently the main The reinforcement measures are: ①vegetation protection; ②skeleton protection; ③rock slope protection; ④closed slope protection; ⑤soil nail reinforcement, etc.; These methods cannot effectively prevent the infiltration of rainwater. At the same time, under the influence of the atmosphere, the soil within the depth of the influence of the atmosphere can also cause cha...

Claims

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Application Information

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IPC IPC(8): C04B24/12
Inventor 王保田李进张文慧张福海李守德
Owner HOHAI UNIV
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