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Title |
An Experimental Study on the Physical Property of Non-Vulcanized Waterproofing Synthetic Rubber Sheet for the Underground Concrete Wall
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Keywords |
미가황 ; 가황 ; 상온가황 ; 합성고무시트 ; 반응지연기간 ; 가교기간 ; 내구성 Naturally vulcanizing ; Waterproofing ; Synthetic rubber ; Delay time ; Curing time ; Tensile strength ; Extension coefficient |
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Abstract |
This paper study on the physical property of naturally vulcanizing waterproofing synthetic rubber sheet for the underground concrete wall. In order to finding the naturally vulcanizing time, the relation of vulcanizing time and tensile strength is analysed from non-vulcanizing to naturally vulcanizing time. Physical tests such as tensile strength, tear strength: etc., under the thermal environment temperature at -20℃, -10℃, 20℃, 60℃. The result of experiment show that the developed rubber sheet has the delay time about 85 days and the curing time about 35 days. The tensile strength increased by about 692% and coefficient of expansion decreased by about 10% which value can be sufficiently compensate the demerit of vulcanized rubber sheet. Also, all of the physical properties of the naturally rubber sheet satisfy the KS standard and compare to the vulcanized rubber sheet, the developed naturally rubber sheet have excellent durability.
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