Room-temperature cured epoxy resin expansive soil modifier as well as preparation and application methods thereof

A technology of epoxy resin and soil modifier, applied in the field of geotechnical engineering, can solve the problems of reducing the swelling property of expansive soil, the difficulty of polymer, weakening the strengthening effect of polymer network, etc., to reduce the swelling ratio, and the preparation and construction methods are simple. Effect

Active Publication Date: 2017-08-25
SHANDONG JIANZHU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One of the chemical improvement methods uses polymers to improve expansive soils, but it still has the following problems: 1) polymers only improve the connection between clay particles through physical effects such as wrapping and mechanical meshing, thus reducing the expansibility of expansive soils and The effect of increasing the strength of expansive

Method used

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  • Room-temperature cured epoxy resin expansive soil modifier as well as preparation and application methods thereof
  • Room-temperature cured epoxy resin expansive soil modifier as well as preparation and application methods thereof
  • Room-temperature cured epoxy resin expansive soil modifier as well as preparation and application methods thereof

Examples

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preparation example Construction

[0033] The synthesis method of magnetic ionic liquid is as described in Chinese invention patent application 201410461633.2. Concrete steps are as follows: (1) 1-hydroimidazole and iodine-containing alkyl compound are dissolved in solvent, then add potassium hydroxide to react, obtain the first mixed solution; (2) the first mixed solution is reacted with methyl iodide, obtaining a second product; and (3) reacting the second product with ferric chloride hexahydrate or ferric bromide hexahydrate to obtain a magnetic ionic liquid.

[0034] In an embodiment of the second aspect, step (2) may also include mixing one or more of water-generating heat-generating agents, defoamers, leveling agents, anti-settling agents, viscosity modifiers and diluents kind.

[0035] In a third aspect, the present invention provides a method for improving expansive soil using the epoxy resin expansive soil modifier as claimed in claim 1, the method may include the following steps: A. mixing epoxy resin,...

Embodiment 1-5

[0051] According to the formulation shown in Table 1 below, a liquid epoxy resin expansive soil modifier was prepared by thoroughly stirring the raw material components. Then, the resulting liquid epoxy resin expansive soil was sprayed onto the undisturbed expansive soil to improve the expansive soil. The specific construction technology and the test results of various indicators are shown in Table 2.

[0052] Table 1. The formula of the epoxy resin expansive soil modifier of embodiment 1-5 expressed in parts by weight

[0053]

[0054]

[0055] Table 2. Use the modifier of embodiment 1-5 to improve the condition of expansive soil and the performance index of expansive soil after improvement

[0056] Example number 1 2 3 4 5 Total amount of spraying (kg / m 2 )

[0057] From the experimental results in Table 2, it can be seen that after being improved by the epoxy resin expansive soil modifier of the present invention, the free expansion rate of the u...

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Abstract

The invention relates to a room-temperature cured epoxy resin expansive soil modifier. The room-temperature cured epoxy resin expansive soil modifier is prepared from the following raw material components: a) epoxy resin; b) magnetic ionic liquid; c) a sulfydryl compound. The epoxy resin expansive soil modifier can further comprise a water-heat-generation type exothermal agent. The invention further provides a preparation method and an application method of the epoxy resin expansive soil modifier. The room-temperature cured epoxy resin expansive soil modifier has the beneficial effects that (1) the expansion ratio of expansive soil is permanently and remarkably reduced through in-situ curing of the epoxy resin and ion exchange between a magnetic ionic liquid curing agent and the expansive soil; (2) the preparation and application methods are simple and are applicable to industrial production.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering. Specifically, the present invention relates to a room temperature curing epoxy resin expansive soil modifier, a preparation method of the room temperature curing epoxy resin expansive soil modifier, and a method of using the room temperature curing epoxy resin expansive soil modifier. Background technique [0002] Expansive soil is a geological body with more cracks and larger expansion and contraction properties. The clay composition of expansive soil is mainly composed of montmorillonite and illite, which are highly hydrophilic minerals. They expand when they absorb water and shrink when they lose water, causing repeated deformation of expansive soil. These properties of expansive soil have serious damage to engineering buildings, so it is necessary to improve expansive soil to reduce the expansibility of expansive soil. [0003] At present, the methods of improving expansive...

Claims

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Application Information

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IPC IPC(8): C09K17/18E02D3/12C09K103/00
CPCC09K17/18C09K2103/00E02D3/12
Inventor 尚文涛
Owner SHANDONG JIANZHU UNIV
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