CN112078193A - Low-permeability modified clay-based anti-seepage barrier blanket and manufacturing method thereof - Google Patents

Low-permeability modified clay-based anti-seepage barrier blanket and manufacturing method thereof Download PDF

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Publication number
CN112078193A
CN112078193A CN202010804442.7A CN202010804442A CN112078193A CN 112078193 A CN112078193 A CN 112078193A CN 202010804442 A CN202010804442 A CN 202010804442A CN 112078193 A CN112078193 A CN 112078193A
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China
Prior art keywords
low
modified clay
fabric
clay layer
permeability modified
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Pending
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CN202010804442.7A
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Chinese (zh)
Inventor
刘宁
甘宇宁
李友强
罗磊
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Shanghai Shengyi Environment Technology Co ltd
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Shanghai Shengyi Environment Technology Co ltd
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Priority to CN202010804442.7A priority Critical patent/CN112078193A/en
Publication of CN112078193A publication Critical patent/CN112078193A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/022—Non-woven fabric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/558—Impact strength, toughness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/726—Permeability to liquids, absorption
    • B32B2307/7265—Non-permeable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2419/00—Buildings or parts thereof

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Revetment (AREA)

Abstract

The invention relates to the technical field of building waterproof materials, and discloses an anti-seepage barrier blanket based on low-permeability modified clay, which comprises the following components: a bottom fabric, a low permeability modified clay layer and a surface fabric; the bottom fabric is a woven geotextile fabric; the low-permeability modified clay layer is a mixture of graded broken stone, sodium bentonite and acrylate adhesive; the surface fabric is a non-woven geotextile fabric; the invention relates to a method for manufacturing an anti-seepage barrier blanket, which comprises the following steps: step 1, fully mixing sodium bentonite, an acrylate adhesive and graded broken stones according to a ratio to obtain a low-permeability modified clay layer; and 2, uniformly spreading the low-permeability modified clay layer on the bottom fabric, and weaving the low-permeability modified clay layer between the bottom fabric and the surface fabric. The anti-seepage barrier blanket is suitable for the waterproof field of various complex and severe water quality environmental engineering, and the manufacturing method has the advantages of simple manufacturing process, convenient material acquisition and lower cost.

Description

Low-permeability modified clay-based anti-seepage barrier blanket and manufacturing method thereof
Technical Field
The invention relates to the technical field of building waterproof materials, in particular to an anti-seepage barrier blanket based on low-permeability modified clay and a manufacturing method thereof.
Background
In recent years, bentonite impermeable blankets produced by taking sodium bentonite as a main raw material have become an important waterproof impermeable material. Because the main mineral montmorillonite in the bentonite has good physical and chemical properties such as expansibility, water absorbability, caking property, ion exchange property and the like, the bentonite can absorb water which is dozens of times of the self weight when meeting water, the volume can be increased by dozens of times after absorbing water, the bentonite is limited in a limited space by the pressure of an upper covering in the construction process to form compact gel, the effect of blocking water permeation is achieved, and the permeation coefficient can be generally as low as 9-10 cm/s.
However, the existing common sodium bentonite impermeable blanket is difficult to play a good waterproof effect in a complex water quality environment, and particularly in the environments of strong acid, strong alkali or other organic solvents and the like in a solid waste landfill, the sodium bentonite loses the due characteristics and cannot meet the impermeable requirement; meanwhile, the main waterproof material of the common sodium bentonite anti-seepage blanket is basically thin-layer bentonite, and the effective thickness of the blanket is about 7-8mm, so that the integral structural strength of the bentonite blanket is low, and the anti-seepage blanket has poor anti-puncture capability, so that the development of the anti-seepage blanket which is resistant to severe water quality environment, strong in anti-puncture capability, convenient to construct and simple to operate becomes a preoccupation of engineering technology. In view of the above, we propose an impermeable barrier blanket based on low permeability modified clay and a manufacturing method thereof.
Disclosure of Invention
The invention aims to provide an anti-seepage barrier blanket based on low-permeability modified clay and a manufacturing method thereof, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a low permeability modified clay-based barrier blanket comprising: the low-permeability modified clay layer is woven between the surface fabric and the bottom fabric through a needling process;
the bottom fabric is a woven geotextile fabric;
the low-permeability modified clay layer is a mixture of graded broken stone, sodium bentonite and acrylate adhesive;
the surface fabric is a non-woven geotextile fabric.
A method of making an impermeable barrier blanket for making an impermeable barrier blanket, the method comprising the steps of:
step 1: fully mixing sodium bentonite, an acrylate adhesive and graded broken stones according to a ratio to obtain a low-permeability modified clay layer;
step 2: and uniformly spreading the low-permeability modified clay layer on a bottom fabric, spreading a surface fabric on the upper layer of the low-permeability modified clay layer, and weaving the low-permeability modified clay layer between the bottom fabric and the surface fabric by adopting a needle punching method to prepare the anti-seepage barrier blanket.
Preferably, in the step 1, the low-permeability modified clay layer is prepared according to the mass percentage, wherein the graded broken stone accounts for 80-90%; the proportion of the sodium bentonite is 10-20%; the proportion of the acrylate adhesive is 0.001-0.005%.
Preferably, in the step 1, the graded broken stones are graded according to the mass percentage, wherein the broken stones with the particle size of less than 0.063mm account for not more than 15%; the proportion of the crushed stones with the particle size between 0.1mm and 0.7mm is more than 50 percent; the organic matter content accounts for not more than 1.5%; no broken stone particles with the particle size of more than 10 mm.
Preferably, in step 1, the swelling index of the sodium bentonite is not less than 12.5 ml/g.
Preferably, in the step 2, the mass per unit area for spreading the low-permeability modified clay layer is 32kg-36kg/m2。
Compared with the prior art, the invention has the beneficial effects that:
1. the impermeable barrier blanket based on the low-permeability modified clay adopts graded broken stones, sodium bentonite and acrylate adhesive which are fully mixed to serve as the low-permeability modified clay layer material, has the effects of extremely low permeability, strong puncture resistance and the like, is suitable for the waterproof field of various complex and severe water quality environment engineering, and is convenient to use.
2. The manufacturing method of the anti-seepage obstructing blanket has the advantages of simple manufacturing process, convenient material taking, lower cost and labor and material resource saving.
Drawings
Fig. 1 is a schematic cross-sectional structure view of the impermeable barrier blanket of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A low permeability modified clay-based barrier blanket, as shown in figure 1, comprising: the low-permeability modified clay layer is woven between the surface fabric and the bottom fabric through a needling process; the bottom fabric is a woven geotextile fabric; the low-permeability modified clay layer is a mixture of graded broken stone, sodium bentonite and acrylate adhesive; in the embodiment, graded broken stones, sodium bentonite and an acrylate adhesive are fully mixed to serve as a low-permeability modified clay layer material, the sodium bentonite absorbs proper moisture to expand, and forms a chemical bond network with the acrylate adhesive to generate a strong and dense cobweb type hydrogel structure, sodium bentonite particles are prevented from reacting with ions in sewage, and a novel composite anti-seepage material with excellent performance, extremely low permeability and strong anti-puncture capability is formed.
Example 2
A manufacturing method of an anti-seepage barrier blanket is used for manufacturing the anti-seepage barrier blanket and is characterized by comprising the following steps:
step 1: fully mixing sodium bentonite, an acrylate adhesive and graded broken stones according to a ratio to obtain a low-permeability modified clay layer;
step 2: and uniformly spreading the low-permeability modified clay layer on the bottom fabric, spreading a surface fabric on the upper layer of the low-permeability modified clay layer, and weaving the low-permeability modified clay layer between the bottom fabric and the surface fabric by adopting a needle punching method to prepare the anti-seepage barrier blanket.
In the embodiment, in the step 1, the low-permeability modified clay layer is prepared according to the mass percentage, wherein the graded broken stone accounts for 80-90%; the proportion of sodium bentonite is 10-20%; the proportion of the acrylate adhesive is 0.001-0.005%.
Further, in the step 1, grading the graded broken stones according to the mass percentage, wherein the broken stones with the particle size of less than 0.063mm account for not more than 15%; the proportion of the crushed stones with the particle size between 0.1mm and 0.7mm is more than 50 percent; the organic matter content accounts for not more than 1.5%; no broken stone particles with the particle size of more than 10 mm.
It is worth noting that in step 1, the swelling index of the sodium bentonite is not less than 12.5 ml/g.
Specifically, in the step 2, the mass per unit area for spreading the low-permeability modified clay layer is 32kg-36kg/m2。
In the embodiment, the manufacturing method of the anti-seepage obstructing blanket is prepared according to the steps and the proportioning requirements of the raw materials, the manufacturing process is simple, the materials are convenient to obtain, the cost is low, manpower and material resources are saved, and the anti-seepage obstructing blanket is convenient to popularize and popularize.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (6)

1. An impermeable barrier blanket based on a low permeability modified clay, the impermeable barrier blanket comprising: the low-permeability modified clay layer is woven between the surface fabric and the bottom fabric through a needling process;
the bottom fabric is a woven geotextile fabric;
the low-permeability modified clay layer is a mixture of graded broken stone, sodium bentonite and acrylate adhesive;
the surface fabric is a non-woven geotextile fabric.
2. A method of making the barrier blanket of claim 1, the method comprising the steps of:
step 1: fully mixing sodium bentonite, an acrylate adhesive and graded broken stones according to a ratio to obtain a low-permeability modified clay layer;
step 2: and uniformly spreading the low-permeability modified clay layer on a bottom fabric, spreading a surface fabric on the upper layer of the low-permeability modified clay layer, and weaving the low-permeability modified clay layer between the bottom fabric and the surface fabric by adopting a needle punching method to prepare the anti-seepage barrier blanket.
3. The method of making an impermeable barrier blanket of claim 2, wherein: in the step 1, the low-permeability modified clay layer is prepared according to the mass percentage, wherein the graded broken stone accounts for 80-90%; the proportion of the sodium bentonite is 10-20%; the proportion of the acrylate adhesive is 0.001-0.005%.
4. The method of making an impermeable barrier blanket of claim 2, wherein: in the step 1, grading the graded broken stones according to mass percent, wherein the proportion of the broken stones with the particle size of less than 0.063mm is not more than 15%; the proportion of the crushed stones with the particle size between 0.1mm and 0.7mm is more than 50 percent; the organic matter content accounts for not more than 1.5%; no broken stone particles with the particle size of more than 10 mm.
5. The method of making an impermeable barrier blanket of claim 2, wherein: in the step 1, the swelling index of the sodium bentonite is not less than 12.5 ml/g.
6. The method of making an impermeable barrier blanket of claim 2, wherein: in the step 2, the mass per unit area for spreading the low-permeability modified clay layer is 32kg-36kg/m2。
CN202010804442.7A 2020-08-12 2020-08-12 Low-permeability modified clay-based anti-seepage barrier blanket and manufacturing method thereof Pending CN112078193A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5221568A (en) * 1990-03-06 1993-06-22 Naue-Fasertechnik Gmbh & Co. Kg Water and/or oil-permeable sealing mat consisting substantially of a substrate layer, a layer of swellable clay and a cover layer
US20120219366A1 (en) * 2011-01-28 2012-08-30 Landis Charles R Bentonite barrier compositions and related geosynthetic clay liners for use in containment applications
CN103660424A (en) * 2013-12-25 2014-03-26 捷高科技（苏州）有限公司 Low permeability coefficient sodium bentonite waterproof blanket and preparation method thereof
CN108017129A (en) * 2017-11-29 2018-05-11 浙江海洋大学 A kind of compound sewage inorganic agent
CN109808249A (en) * 2019-01-02 2019-05-28 北京仁创科技集团有限公司 A kind of ventilation anti-seepage blanket and its production technology

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5221568A (en) * 1990-03-06 1993-06-22 Naue-Fasertechnik Gmbh & Co. Kg Water and/or oil-permeable sealing mat consisting substantially of a substrate layer, a layer of swellable clay and a cover layer
US20120219366A1 (en) * 2011-01-28 2012-08-30 Landis Charles R Bentonite barrier compositions and related geosynthetic clay liners for use in containment applications
CN103660424A (en) * 2013-12-25 2014-03-26 捷高科技（苏州）有限公司 Low permeability coefficient sodium bentonite waterproof blanket and preparation method thereof
CN108017129A (en) * 2017-11-29 2018-05-11 浙江海洋大学 A kind of compound sewage inorganic agent
CN109808249A (en) * 2019-01-02 2019-05-28 北京仁创科技集团有限公司 A kind of ventilation anti-seepage blanket and its production technology

Non-Patent Citations (3)

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Title
刘阳生等: "新型膨润土防渗卷材的研制及其性能", 《清华大学学报(自然科学版)》 *
王建军: "路面防渗水的几点考虑", 《公路》 *
白庆中等: "新型人工合成膨润土防渗卷材的研制及其渗透性能", 《环境科学》 *

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Application publication date: 20201215