CN1363640A

CN1363640A - Composite water-stopping isolating agent

Info

Publication number: CN1363640A
Application number: CN 02110779
Authority: CN
Inventors: 吕子义; 周锡蕙
Original assignee: Shanghai Jiaotong University
Current assignee: Shanghai Jiaotong University
Priority date: 2002-02-05
Filing date: 2002-02-05
Publication date: 2002-08-14
Anticipated expiration: 2022-02-05
Also published as: CN1147559C

Abstract

A composite water stopping and isolating agent for soil is composed of the reactive inorganic material (powdered coal ash and calcium lime powder) and the hydrophobic high-molecular organic material (foamed polystyrene plastic granules). It is applied through spreading a layer of reactive inorganic material (10-50 cm in thickenss) and then spreading a layer of said high-molecular material (10-40 cm in thickness) to prevent the upward escape of water in soil.

Description

Composite water-stopping isolating agent

Technical field:

The present invention relates to a kind of composite water-stopping isolating agent, is a kind of composite water-stopping isolated material that stops the directed infiltration of moisture, belongs to civil engineering material technical field.

Background technology:

Soil is a kind of hydrophilic material, and infiltration and diffusion very easily take place in this material moisture.The infiltration motion has taken place by the various pore channels in the soil in water molecules, and its result moist phenomenon occurs on the top layer of soil, or a large amount of water soakings of leaving over after moisture evaporation occurring on the face of land.For avoiding moist phenomenon on the face of land, occurring, the conventional rule of doing is a lay siccative on the face of land, blot by the tiny moisture of soil internal penetration with siccative, and prevailing way is used as siccative with unslaked lime or fine grinding quicklime powder exactly to the ground table section.Result of Chu Liing so, following period of time can reach the effect that the face of land is kept dry state in the early stage.Can clear up reaction after the lime suction and become white lime.White lime will form the open pore of a lot of opening shapes within it in the bilge construction after calcium hydroxide crystallization and excessive moisture evaporation take place in inside.Because calcium hydroxide itself also is a kind of hydrophilic material, therefore, the underground water in the soil still can continue to cause the dampness of white lime laminar surface by upwards diffusion of the hole in the white lime at this moment.Therefore, adopt unslaked lime to be actually unsuccessful as face of land siccative.

According to the retrieval, patent of invention (publication number 1113933), (publication number 1194175) and (publication number 1094054) are introduced all is the drying material that a kind of water in air that is used for absorbing local zonule is divided, and can't stop the phreatic diffusive migration that makes progress.Patent of invention " osmotic waterproofing agent, material water-proof material, concrete or mortar composition, and the method that prevents seepage " (publication number 1246138) provides a kind of waterproofing agent that can use and have good block-water performance in a simple manner.Its mechanism of action is that this material can penetrate into and causes in the crack or hole that leaks, thereby fills this slit to prevent that water is from seepage wherein.Yet the waterproofing agent of the disclosure in fact just is exclusively used in a kind of patching material on the buildings, can not stop the upwards diffusive migration along capillary porosity duct in the soil of moisture in the soil at all.Summary of the invention and embodiment:

The objective of the invention is at the deficiencies in the prior art, a kind of novel composite water-stopping isolating agent is provided, make it to have the buffer action that well blocks water, effectively stop upwards infiltration diffusion of underground moisture.

For realizing such purpose, in the technical scheme of the present invention, water-stopping isolating agent is made up of two class materials.One class is the response type inorganic materials, and another kind of is the hydrophobic nature organic polymer material.The response type inorganic materials is made up of flyash and calcium lime powder, and wherein the content of calcium lime powder (weight percent) is 10%-35%, and the hydrophobic nature organic polymer material then is made up of the polystyrene foaming type plastic grain.

During use, response type inorganic materials place mat is under the hydrophobic nature organic polymer material.In the heatable adobe sleeping platform or bottom land of humidity, lay the groundwork earlier with the response type inorganic materials, gauge control is at 10-50cm, slightly as the surface shakeout with compacting after, upper berth polystyrene foaming type plastic grain, thickness are 10-40cm.

After underground water upwards is diffused in the compound of flyash and calcium lime powder, slaking reaction at first takes place in calcium lime powder, the calcium hydroxide that reaction generates under the state of humidity with flyash in active silica generation chemical reaction, generate hydrated calcium silicate gel.The mutual adhesion of this gel becomes as a whole, and progressively becomes the comparatively solid plate with certain intensity.This plate is the capillary porosity duct in the shutoff soil closely, and those underground water that permeate are up all absorbed, and refusal moisture is upwards diffusion easily, simultaneously again this part moisture as the prerequisite that makes self generation chemical reaction.The styrofoam particle that is layered on the upper strata is a kind of hydrophobic material, plays effectively to cut off water molecules infiltration road, and underground water the upwards diffusion chance is here got rid of fully.Like this, the article of placing in the zone on the expanded plastic granular layer just can be in the dried state of a kind of gas all the time, and can not be subjected to interference and infiltration from underground infiltration water again.

Composite water-stopping isolating agent of the present invention has the good buffer action that blocks water, and can effectively cut off the capillary porosity duct in the soil, stops the moisture diffusion mobility that makes progress.With soil in moisture upwards lay the directed scattering and permeating that this material can effectively stop moisture on the perpendicular in-plane of the channel direction of infiltration, and the other end keeps the dried state of gas, eliminates moist phenomenon.

Claims

1, a kind of composite water-stopping isolating agent, it is characterized in that forming by two class materials, one class is the response type inorganic materials, another kind of is the hydrophobic nature organic polymer material, the response type inorganic materials is made up of flyash and calcium lime powder, wherein the content of calcium lime powder (weight percent) is 10%-35%, and the hydrophobic nature organic polymer material is made up of the polystyrene foaming type plastic grain.

2, a kind of using method as the said composite water-stopping isolating agent of claim 1, it is characterized in that response type inorganic materials place mat under the hydrophobic nature organic polymer material, lay the groundwork with the response type inorganic materials earlier, gauge control is at 10-50cm, slightly as the surface shakeout with compacting after, upper berth polystyrene foaming type plastic grain, thickness are 10-40cm.