DOI QR코드

DOI QR Code

A Basic Study to Prepare a Watertightness Evaluation Plan for Sealant Applied to Joints Between Members of PC Structures

PC 구조물 부재간 접합부에 적용되는 실링재의 수밀성 평가방안 마련을 위한 기초적 연구

  • Kim, Tae-Ho (Housing & Building Tech. R&D Institute, DL E&C) ;
  • Kim, Yong-Ro (Housing & Building Tech. R&D Institute, DL E&C) ;
  • Ko, Hyo-Jin (Housing & Building Tech. R&D Institute, DL E&C) ;
  • Park, Jin-Sang (Korea Advanced Material Testing & Reaserch Institute Co., Ltd.) ;
  • Kim, Dong-Bum (Korea Advanced Material Testing & Reaserch Institute Co., Ltd. ) ;
  • Lee, Sang-Wook (Korea Advanced Material Testing & Reaserch Institute Co., Ltd. )
  • Received : 2022.10.30
  • Accepted : 2022.11.19
  • Published : 2023.02.20

Abstract

This study was conducted to examine the feasibility of preparing a durability evaluation plan in watertightness for sealant applied to a PC structure. To this end, 5 types of sealant that equally satisfy the quality standards of the relevant KS standard were selected and tested. Through this testing, it was found that 3 of the 5 types of sealant showed deterioration in watertightness and durability, such as falling off and cracking from the substrate. For the remaining two types, a visual observation showed no significant changes, but additional analysis, confirmed that there was a large difference in the stress reduction rate of the material. Therefore, based on the above results, the need for a performance review in durability between sealant was confirmed, and based on this, the validity of the durability evaluation plan that can be used in product selection was quantitatively confirmed.

본 연구는 PC공법에 적용되는 실링재를 대상으로 수밀성 측면의 내구성 평가방안 마련의 타당성을 검토하기 위하여 진행하였다. 이를 위해 관련 KS표준의 품질기준에 동일하게 만족하는 실링재 5종을 선정하여 시험을 진행하였으며, 시험결과 5종의 실링재 중 3개 실링재가 바탕면과의 탈락 및 균열 등 수밀성 저하를 나타냈으며, 2종의 경우 육안관찰 상 큰 변화는 없었으나, 추가분석을 통해 소재의 응력 저하율의 차이가 크게 발생하는 것을 확인할 수 있었다. 이에 상기 결과를 근거로 향후 실링재 간 수밀성 측면의 성능검토 필요성을 확인하였으며, 이를 기반하여 제품 선정 시 활용 가능한 수밀성 평가방안의 타당성을 정량적으로 확인하였다.

Keywords

Acknowledgement

This work is supported by the Korea Agency for Infrastructure Technology Advancement(KAIA) grant funded by the Ministry of Land, Infrastructure and Transport(Grant 22ORPS-C158135-03).

References

  1. Shin DH, Seo SY, Kim KS. Experiment on the hysteretic behavior of a hollw PC column-half PC beam exterior joint. Journal of the Korea Concrete Institute. 2017 Oct;29(5):515-24.  https://doi.org/10.4334/JKCI.2017.29.5.515
  2. KS F 4910. Sealants for sealing and glazing in buildings. Seoul (Korea): Korean Standard Association; 2021. p. 1-4. 
  3. Kim SR, Seo JJ. Final report on the development of sealing finishing construction technology for building structures with an elastic restoring force of 80%. Sejong (Korea): Ministry of Land, Infrastructure and Transport, Korea Agency for Infrastructure Technology Advancement; 2018 Aug. 32 p. Contract No.: 17CTAP-C097895-03. 
  4. Jeon JS. The development of selection evaluation index for waterproofing and anti-corrosion materials of water-supply concrete facilities [doctor's thesis]. [Busan (Korea)]: Tongmyong University; 2017. 2 p. 
  5. Hwang JH. Seismic performance of precast concrete beam-column connection tightened by post-tensioning method [doctor's thesis]. [Seoul (Korea)]: The University of Seoul; 2017. 3 p. 
  6. Shim NJ. A study of the structure of the precast prestressed concrete slab with long span hybrid rib [doctor's thesis]. [Seoul (Korea)]: Konkuk University; 2019. 5 p. 
  7. Choi SD. Flexural and shear strength of prestressed inverted Multi-Tee precast concrete slabs [doctor's thesis]. [Seoul (Korea)]: The University of Seoul; 2022. 1 p. 
  8. Yoon SH. Structural behavior of beam-column joints composed of rc column and hybrid steel beam with pc concrete ends [master's thesis]. [Seoul (Korea)]: Hanyang University; 1998. 2 p. 
  9. Logon D, Schabowicz K, Wroblewski K. Assessment of the mechanical properties of ESD pseudoplastic resins for joints in working elements of concrete structures. Materials. 2020 May;13(11):2426. https://doi.org/10.3390/ma13112426 
  10. KS F 3211. Waterproofing membrane coating for construction. Seoul (Korea): Korean Standard Association; 2015. p. 15-6. 
  11. KS F 2274. Recommended practice for accelerated artificial exposure of plastics building materials. Seoul (Korea): Korean Standard Association; 2018. p. 2-9. 
  12. KS F 4716. Cement filling compound for surface preparation. Seoul (Korea): Korean Standard Association; 2022. p. 8-9. 
  13. KS F 4925. Cement mortar mixed liquid waterproofing agent. Seoul (Korea): Korean Standard Association; 2018. p. 4-5.