This paper presents a study on the adhesive strength testing of self-adhesive waterproofing/anti-corrosion sheet used for waterproofing of the large diameter steel pipe interior of water treatment facilities. After the sheet has been applied, similar physical and chemical immersion conditions are simulated in the testing to determine the effects of deterioration through adhesion strength testing.

Result of test, adhesive strength improved 7% in 4℃ when test object used vibrating roller than unused vibrating roller. In case of 20℃, it improved 16.9%. Therefore, using vibrating roller is useful in construction of waterproofing layer because the test showed that using vibrating roller has excellent adhesive strength han unused it.

This study is to investigate the waterproofing effects on the splice length of the waterproofed sheet. A Total of 10 specimens were produced and tested in order to investigate the waterproofing effects for reinforced concrete members. Test variables are the lengths of splice, the attachment method of waterproofed sheet and existence of mesh. The splices’ length set as 5%, 6.6%, and 10% of waterproofed sheet’s width. Two ways of Epoxy adhesion and hot-melt were used. Also, the mesh put to enhance the adhesion capacity between waterproofed sheets. The results of the experimental test, the specimens which composed with splice length over 6.6% of waterproofed sheet, epoxy adhesion constructed and with/without mesh did not showed water leakage. Whereas, the specimen of splice length under 5% and epoxy applied showed water leakage. In addition, the specimen with mesh (BE-S1-M1) proved less water leakage than the one without mesh (BE-S1-M0).

Underground material and to secure any other appropriate waterproofing method for improving the workability experiments on non-woven fabric weight is selected. As a result, the appropriate non-woven fabric weight of 140 g/㎡ was confirmed.

PVC waterproofing sheet is applied in exposed form on the rooftop of building. However, existing reinforcing fiber is would be occurred defect of waterproofing layer tear, because it has a anisotropy. As a result of test, while A-specimen and C-specimen have not the anisotropy, B-specimen has the anisotropy. B-specimen which is applied patterns of reinforcing fiber of I-type, is wide variations in the mechanical properties. C-specimen which is applied patterns of reinforcing fiber of Z-type, is not wide variations in the mechanical properties because it has the anisotropy.

This study is to review its possibility of recycling, subject for Polyolefine (TPO) and Polyvinyl Chloride (PVC) among thermoplasticity plastic raw materials, of which recycling is possible. Wasted vinyl and processing by-products have been used for Polyolefine (TPO), and coating from used cable and its by-products used for Polyvinyl Chloride (PVC). The study result is shown as following. (1) In case of Polyolefine (TPO), superior property has been shown, when mixed with raw materials, as the property of by-products is excellent. For Polyvinyl Chloride (PVC), property in the same level as raw materials has been shown up to 50% of by-products mixing rates. (2) In case of coating from the used cable, the property as exactly same as raw materials without property loss has been shown since long time passed, with using highquality raw materials at that time of manufacture.

본 연구는 콘크리트 지하구조물 외부에 적용하는 방수공법으로 120일 후 가황되도록 가황제, 가황조제 등을 첨가하여 배합제조된 합성고무시트 방수재로써 약 85일의 delay time과 약 35일의 curing time을 가지며, 이때 인장강도는 약 692%가 증가하고, 신장률은 약 10% 감소하여, 일반시트의 시공시 단점을 미가황상태로 시공되어 보완하고, 상온에서 가황하여 내구성능을 확보할 수 있는 것으로 나타났다. 또한 가황직후 및 가황 1년 후의 각종 열화요인에 대한 내구성능을 평가한 결과 관련 품질기준을 만족하며, 미가황 상태에서의 합성고무 시트에 보호모르타르를 시공하여 접착성능을 평가한 결과 첨가된 실리케이트에 의하여 보호모르타르와 수화반응에 의한 양호한 부착성능이 확보되는 것으로 나타났다.