Creep Test status quo geomembrane geomembrane currently creep test method geosynthetics Geomembrane quality, the use of dead weight loading device, which is a relatively simple, inexpensive and because the precise sample loading device, in During the test, the creep load is not necessary to maintain a constant control. In addition, there are some experimental use mechanical, hydraulic, pneumatic loading device Geomembrane manufacturers, or considering the temperature, humidity, plus bound forms of geosynthetics creep performance testing. Creep test Test status quo specialty materials research group and a joint Department of Civil Engineering, University of Florence, the use of three geosynthetics: a high-density polyethylene molded geogrid, a PET geogrid and a piece of woven PP / PET nonwoven non-woven geotextile mixing components. Test at room temperature 10 ℃, at 20 ℃ and 40 ℃ performed at a tensile load of varying width Shan tensile strength of 20%, 30% and 5 both fabric under test. From the experimental results shows that: geogrid made from HDPE molded, when the creep load to 50% of its width tensile strength, to destroy. Tianjin Textile Institute of 汤宝润 with high temperature applications such as a Japanese tank DSS-500 Shimadzu universal testing machine, using the effective size of acupuncture geotextile 100x500mmZ do samples were measured at different load levels under different temperature conditions and longitudinal creep different time, and the empirical formula obtained creep, creep found geotextile level depends on the external load and ambient temperature, creep linear relationship between the logarithm of time. In addition, the geomembrane is also a four-element linear mechanical model law geotextile, according to the test measured creep curves derived creep constants to calculate the long-term load geotextile under creep and creep rupture time required, so as to estimate the life of the project mentioned basis. Qingdao University of 张洪弟 their use of physical optical lever method, using a small amplification principle, such as the optical lever measured creep tiny amount, geotextile certain extent reduced zero drift due to the instrument itself, so that the test data generated bias filtration filtration criteria guidelines for national standard specification proposed geomembrane, geotextile geomembrane used for filtration in accordance with our national standards, "the application of geosynthetics technical specifications" fabric shall conform to the following guidelines. Soil protection criteria Soil protection filtration material shall conform to the requirements of the following formula geotextile equivalent aperture, where, according to the quality of the soil, soil particle size of less than the total size of the soil particles characteristic quality of the soil to determine ; when the soil content of large fines, and when you take a reciprocating flow coefficient determined by engineering experience, should adopt a small value. ) Permeability permeability criteria filtration material shall conform to the formula requirement coefficient, geomembrane determined by engineering experience, not less than the formula determined; shall be the vertical permeability of geotextile permeability coefficient, soil permeability,) attempts to prevent Guidelines filtration materials should be consistent with attempts to prevent the column requirements: on-site soil samples geomembrane material made and to be selected geotextile clogging test after making the resulting gradient ratio should comply with the requirements of the following formula when the drainage failure and loss When huge, should the proposed site with geotextile and soil material clogging indoor test. For woven geotextile geomembrane best Geomembrane, Soil protection criteria may refer to the following provisions: clay, loam, when the protective layer covering large-block material (sewing clay content greater means woven geotextile equivalent aperture). Under the gap is small (such as precast) conditions, can be slit small sandy soil, covered with a protective layer of geomembrane material in large blocks (clay content less than, whichever is greater, or else take a small value (eg prefabricated Under pieces) conditions, can be; the waves less than wholesale Geomembrane | Zhengzhou Geomembrane | Edison Group is provided by Edison Edison New Materials Co., New Materials Co., Ltd (www.fangshenmo.com. ) strong, credible, in Dezhou site construction materials industry has accumulated a large number of loyal customers. The company better work attitude and constantly improve the innovative ideas will lead Edison new materials into the brilliant and you work better Future!