CN202755383U - Anti-sea-water bentonite waterproof blanket - Google Patents
Anti-sea-water bentonite waterproof blanket Download PDFInfo
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- CN202755383U CN202755383U CN 201220331088 CN201220331088U CN202755383U CN 202755383 U CN202755383 U CN 202755383U CN 201220331088 CN201220331088 CN 201220331088 CN 201220331088 U CN201220331088 U CN 201220331088U CN 202755383 U CN202755383 U CN 202755383U
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- woven geotextile
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Abstract
The utility model relates to an anti-sea-water bentonite waterproof blanket which comprises a non-woven geotextile layer and a woven geotextile layer. A sodium base bentonite composite layer is fixed between the non-woven geotextile layer and the woven geotextile layer in a needling mode. The non-woven geotextile layer is coated with a geotextile membrane layer in a glue-spraying mode. The sodium base bentonite composite layer comprises high-molecular polymers like bentonite particles, anionic carboxymethyl cellulose, anionic polyacrylamide and the like. The sodium base bentonite composite layer in fresh water is good in expansion performance and filter loss. Expansion rate is more than 30, filter loss is controlled within 15 and permeability quotient is controlled within 2*10-10cm/s. The anti-sea-water bentonite waterproof blanket is obvious in waterproof effect for a saline-alkali soil underground water area and even a sea water area, capable of being directly laid on a project base with underground water of the sea water or a project base of a saline-alkali land with high degree of mineralization without prehydration processing, simple in construction, easy to operate, and low in cost.
Description
Technical field
The utility model relates to the building water-proof material, and particularly a kind of anti-seawater sodium bentonite waterproofing materials is used for by the antiseepage of the ground water engineering of seawater or the contaminants such as saline and alkaline, even directly applies to the antiseepage leakproof of seawater.
Background technology
Along with the exploitation in enlargement of cities and soil, the land used of down town is fewer and feweri, and is urgent all the more to the utilization increase in marine site expansion and landlocked salt-soda soil, therefore, also becomes important all the more and thorny for this type of regional buildings waterproof.Sodium-based bentonite waterproof carpet is as a kind of new material be widely used waterproof and antiseepage with projects such as building, refuse landfill, mine, tunnel, ecological lake and water conservancies.The main component of sodium bentonite is montmorillonite, and its molecular structure is the aluminum-oxygen tetrahedron structure, interlayer distribution high concentration Na
+In the fresh water, montmorillonite interlayer cation and water carry out ion-exchange, take face-end overlap joint and end-end overlapping mode between the swell soil platelet, thereby interfloor distance is widened, and show expansion character.But studies show that without volume free wxpansion after the sodium bentonite suction in the situation of limitation power to more than 15 times of own vol.When applying a continuous limitation pressure to sodium bentonite when, expansion is restricted, and forms the colloid waterproof film of one deck steady and continuous under the effect of limitation power, has hindered passing of moisture.Yet contain a large amount of chlorions and Ca in seawater and the Underground Water in Salinization Area
2+, Mg
2+In electrolyte, affected the cation exchange coefficient of montmorillonite interlayer ion, so that the overlapping mode between the swell soil platelet overlaps as main take face-face, be difficult to form continuously consistent fine and close colloidal film, thereby cause the failure of project waterproof, leakproof.Therefore, develop the task of top priority that a kind of anti-seawater sodium-based bentonite waterproof carpet becomes the technician.
The utility model content
The purpose of this utility model is to overcome the deficiency that prior art exists, and a kind of anti-seawater sodium-based bentonite waterproof carpet is provided, and is intended to improve its waterproof effect.
The purpose of this utility model is achieved through the following technical solutions:
Anti-seawater GCL, characteristics are: comprise non-woven geotextile layer and braided geotextile layer, between non-woven geotextile layer and braided geotextile layer, be fixed with the sodium bentonite composite bed by the acupuncture mode, on the non-woven geotextile layer, be covered with geotechnological thin layer by the glue spraying mode.
Further, above-mentioned anti-seawater GCL is characterized in that: described braided geotextile layer is that polypropylene splits film flat filament braided geotextile layer, and the grammes per square metre scope is 100～200 g/ms.
Further, above-mentioned anti-seawater GCL is characterized in that: described non-woven geotextile layer is the short silk of polypropylene acupuncture nonwoven geotechnique layer of cloth, and the grammes per square metre scope is 100～300 g/ms.
Again further, above-mentioned anti-seawater GCL is characterized in that: described geotechnological thin layer is the polyethylene film for earthwork layer, and its thickness is 0.1mm～0.75mm.
The substantive distinguishing features of technical solutions of the utility model and progressive being mainly reflected in:
1. the employing of the sodium bentonite composite bed between non-woven geotextile layer and braided geotextile layer polymer modification sodium bentonite is raw material, in fresh water, its expansion character and filter loss are good, expand doubly can reach more than 30, and Filtrate Loss Control is controlled at 2 * 10 15 with interior and transmission coefficient
-10In the cm/s;
2. remarkable for the waterproof effect in Underground Water in Salinization Area or even seawater zone, need not to carry out prehydration and process, can directly be layed in underground water is on the higher salt-soda soil project basal plane of seawater or salinity, constructs simple to operation, saves cost;
3. anti-seawater sodium-based bentonite waterproof carpet is except the scope of application of common waterproof blanket, can also be used for waterproof, the antiseepage project on salt-soda soil, marsh, underground water mineralising zone, greater coasting area even seashore, the water resistance requirement that is up to state standards.
Description of drawings
Below in conjunction with accompanying drawing technical solutions of the utility model are described further:
Fig. 1: cross section structure schematic diagram of the present utility model.
The specific embodiment
As shown in Figure 1, anti-seawater GCL, comprise non-woven geotextile layer 1 and braided geotextile layer 2, non-woven geotextile layer 1 is the short silk of polypropylene acupuncture nonwoven geotechnique layer of cloth, the grammes per square metre scope is 100～300 g/ms, braided geotextile layer 2 splits film flat filament braided geotextile layer for polypropylene, the grammes per square metre scope is 100～200 g/ms, between non-woven geotextile layer 1 and braided geotextile layer 2, be fixed with sodium bentonite composite bed 3 by the acupuncture mode, on non-woven geotextile layer 1, be covered with geotechnological thin layer 4 by the glue spraying mode, geotechnique's thin layer 4 is the high-density polyethylene geomembrane layer, and its thickness is 0.1mm～0.75mm.
It is emphasized that and contain the high molecular polymers such as bentonite clay particle, anion carboxymethyl cellulose and PAMA in the sodium bentonite composite bed 3.The particle diameter of bentonite clay particle is: 100% less than 2mm and 85% above greater than the 0.2mm(weight ratio), the coefficient of expansion is greater than 24ml/2g, and filter loss is less than 18ml, and smectite content is greater than 85%, and moisture is less than 12%.The viscosity of the high molecular polymers such as anion carboxymethyl cellulose and PAMA requires more than 40cp.The weight proportion of the high molecular polymers such as anion carboxymethyl cellulose and PAMA is 100:(1～3 in the sodium bentonite composite bed).The mixture quality of every square metre of high molecular polymer such as contained bentonite clay particle, anion carboxymethyl cellulose and PAMA is 2.8～4.5kg in the sodium bentonite composite bed 3.
The high molecular polymers such as anion carboxymethyl cellulose and PAMA are to adopt the mode of biopolymerization that molecule monomer is polymerized, and its molecular structure is long-chain shape structure in the water body.In the time of in being dissolved in water body, above-mentioned two kinds of polymer architectures are unfolded, and the swell soil platelet in the seawater is adsorbed in separately the long-chain mechanism, have stoped the face of swell soil platelet-face overlapping mode, have increased bentonitic expansion character and colloidal property.
During construction, geotechnological thin layer 4 is upstream face, and braided geotextile layer 2 contacts with the building basal plane, and non-woven geotextile layer 1 fibre that is seen through braided geotextile one side by needle-penetration is interlocked with basal plane firmly, prevented the play of waterproofing materials.Underground moisture in the basal plane enters into sodium bentonite composite bed 3 from the space of non-woven fabrics fiber silk and braided geotextile, sodium bentonite composite bed 3 absorbs moisture and expands, and has filled up the material damage that causes in lap gap, basal plane crack and the work progress of waterproofing materials etc.
The technological process of making anti-seawater sodium-based bentonite waterproof carpet is:
1) according to the difference of different project seepage controlling requirements and construction ground groundwater quality, determines the optimum mixture ratio example of sodium bentonite, anion carboxymethyl cellulose, PAMA;
2) use the high-speed stirred hybrid technique, carry out sodium bentonite and high molecular polymer compound;
3) with braided geotextile layer 2 as the bottom carrier, the technique that above-mentioned mixed material is sprayed with concussion at the uniform velocity evenly is sprinkling upon on the braided geotextile layer 2, forms sodium bentonite composite bed 3;
4) adopt the rhombus needling process, acupuncture nonwoven geotechnique layer of cloth 1 is crossed sodium bentonite composite bed 3 with non-woven geotextile fibre needle-penetration and is entered into braided geotextile layer 2, and the self-locking of sodium bentonite composite bed is fixed between the two-layer geotextile;
5) adopt Z-shaped hot spray-bonding craft, geotechnological thin layer 4 is adhered on the non-woven geotextile layer 1;
6) cut according to demand, pack anti-seawater sodium-based bentonite waterproof carpet.
Above-mentioned anti-seawater GCL highlights following characteristics:
Performance significantly promotes, high molecular polymer and bentonitic effective combination, strengthen bentonitic expansion character, colloid intensity and water resistance, utilized its long-chain shape molecular structure to be cascaded with sheet sodium bentonite platelet, formed fine and close continuously swell soil-polymer waterproof film.
The scope of application is enlarged, common waterproof blanket is only applicable to fresh water area and water quality near waterproof, the antiseepage in the underground water zone of tap water, in case construction environment is saline alkali environment or even contaminated environment, bentonitic performance namely can be suppressed, and causes waterproof blanket to lose due waterproof effect; Anti-seawater sodium-based bentonite waterproof carpet can also be used for waterproof, the antiseepage project on salt-soda soil, marsh, underground water mineralising zone, greater coasting area even seashore except the scope of application of common waterproof blanket, the water resistance requirement that is up to state standards.
Belong to environmentally friendly product, swell soil is natural sodium bentonite, belongs to natural minerals, self-assembling formation; The high molecular polymers such as PAMA and anion carboxymethyl cellulose are for to regard as body harmless's product through national health department and the World Health Organization; Geotextile raw material as carrier is 100% polypropylene, is embedded in undergroundly can initiatively be degraded to environmentally friendly thing.
Cost savings, reasonably waterproof system and constructure scheme are saved the whole cost of project.
Flexible modulation can be carried out rational polymer ratio adjustment according to the water quality situation of job site, to satisfy the requirement of national standard and project waterproof, antiseepage.
What need to understand is: the above only is preferred embodiment of the present utility model; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (4)
1. anti-seawater GCL, it is characterized in that: comprise non-woven geotextile layer (1) and braided geotextile layer (2), between non-woven geotextile layer (1) and braided geotextile layer (2), be fixed with sodium bentonite composite bed (3) by the acupuncture mode, upward be covered with geotechnological thin layer (4) by the glue spraying mode at non-woven geotextile layer (1).
2. anti-seawater GCL according to claim 1, it is characterized in that: described braided geotextile layer (2) splits film flat filament braided geotextile layer for polypropylene, and the grammes per square metre scope is 100～200 g/ms.
3. anti-seawater GCL according to claim 1 is characterized in that: described non-woven geotextile layer (1) is the short silk of polypropylene acupuncture nonwoven geotechnique layer of cloth, and the grammes per square metre scope is 100～300 g/ms.
4. anti-seawater GCL according to claim 1, it is characterized in that: described geotechnological thin layer (4) is the polyethylene film for earthwork layer, and its thickness is 0.1mm～0.75mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220331088 CN202755383U (en) | 2012-07-10 | 2012-07-10 | Anti-sea-water bentonite waterproof blanket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220331088 CN202755383U (en) | 2012-07-10 | 2012-07-10 | Anti-sea-water bentonite waterproof blanket |
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| Publication Number | Publication Date |
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| CN202755383U true CN202755383U (en) | 2013-02-27 |
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ID=47734572
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220331088 Expired - Lifetime CN202755383U (en) | 2012-07-10 | 2012-07-10 | Anti-sea-water bentonite waterproof blanket |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103950237A (en) * | 2013-11-07 | 2014-07-30 | 河海大学 | Geosynthetic material bentonite waterproof blanket for usage under conditions of high salt content and salt ion sewage and a preparation method thereof |
| CN104191742A (en) * | 2014-07-31 | 2014-12-10 | 山东浩阳新型工程材料股份有限公司 | Sodium-based bentonite waterproof carpet |
| CN111549829A (en) * | 2020-05-22 | 2020-08-18 | 南昌大学 | Bentonite waterproof blanket for enhancing anionic pollution barrier capability and manufacturing method thereof |
| CN115057658A (en) * | 2022-06-20 | 2022-09-16 | 上海大学 | Compound high polymer material modified bentonite anti-seepage gasket, and preparation method and application thereof |
| CN117263196A (en) * | 2023-11-21 | 2023-12-22 | 交通运输部公路科学研究所 | Modified sodium bentonite, preparation method thereof and waterproof structure |
-
2012
- 2012-07-10 CN CN 201220331088 patent/CN202755383U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103950237A (en) * | 2013-11-07 | 2014-07-30 | 河海大学 | Geosynthetic material bentonite waterproof blanket for usage under conditions of high salt content and salt ion sewage and a preparation method thereof |
| CN104191742A (en) * | 2014-07-31 | 2014-12-10 | 山东浩阳新型工程材料股份有限公司 | Sodium-based bentonite waterproof carpet |
| CN111549829A (en) * | 2020-05-22 | 2020-08-18 | 南昌大学 | Bentonite waterproof blanket for enhancing anionic pollution barrier capability and manufacturing method thereof |
| CN115057658A (en) * | 2022-06-20 | 2022-09-16 | 上海大学 | Compound high polymer material modified bentonite anti-seepage gasket, and preparation method and application thereof |
| CN117263196A (en) * | 2023-11-21 | 2023-12-22 | 交通运输部公路科学研究所 | Modified sodium bentonite, preparation method thereof and waterproof structure |
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| GR01 | Patent grant | ||
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Granted publication date: 20130227 |
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| CX01 | Expiry of patent term |