DOI QR코드

DOI QR Code

An Analysis of the Mechanism of Crack Stop-bar for Floor Plastering of Apartment Buildings

공동주택 바닥미장 균열차단막의 메커니즘 분석

  • Song, Yong-Sik (U-top Engineering Corp.) ;
  • Lee, Dong-Hoon (Department of Architectural Engineering, KyungHee University) ;
  • Lee, Sung-Ho (Department of Architectural Engineering, KyungHee University) ;
  • Kim, Sun-Kuk (Department of Architectural Engineering, KyungHee University)
  • Received : 2011.01.19
  • Accepted : 2011.07.27
  • Published : 2011.08.20

Abstract

The recent expansion in the number of housing construction projects has been accompanied by substantial improvements in construction quality, which can be attributed to the development of new construction technologies and materials. In apartment complex construction projects, numerous mechanization technologies have been adopted as part of the floor plastering process to counter increasing difficulties in securing labor and the pressing need to reduce lead time, but these have also triggered setbacks such as additional costs or loss of time to fix cracks in or loosening of floor. Cracks developing in the floor of an apartment housing unit, in terms of materials in use, are the products of a complex combination of material makeup, construction workmanship, concrete curing and the protection method. Controlling such elements from the perspective of materials in use may ensure partial success in reducing cracks, but fall short of eliminating them completely. Any attempt to prevent cracks from developing in the first place requires systematic analysis as to their potential causes and viable solutions to reduce them. On this backdrop, this paper aims to provide an analysis of potential causes of cracks found in floor plastering, and consider the mechanism of a crack stop-bar as a fundamental safeguard against them.

최근 주택 건설은 양적으로 팽창하면서 신공법, 신소재의 개발로 품질에 많은 발전을 하고 있으나 공동주택 공사 중 방바닥 미장은 인력난과 공기단축을 해결하기 위해 기계화 시공을 함으로서 방바닥 미장의 크랙발생 및 들뜸 현상으로 인한 하자 발생으로 경제적, 시간적 낭비가 많다. 공동주택 바닥미장의 균열은 재료적인 측면에서 볼 때 사용재료의 구성과 시공정도, 양생, 보양방법에 따른 각 요인이 복합적으로 작용하여 발생된다. 그러나 재료적인 측면에서 위 요인들을 제어하여 균열을 부분적으로 억제할 수 있으나 근본적인 균열방지는 불가능하다. 균열의 발생을 억제하기 위해서는 바닥미장 균열의 발생원인과 균열 저감기술에 대한 논리적인 분석이 필요하다. 따라서 본 연구에서는 바닥미장 균열의 원인과 근본적인 억제를 위한 균열차단막의 메커니즘을 분석하고자 한다.

Keywords

References

  1. Hyundai development company institute of technology. [A study of performance and feasibility of half self leveling mortar]. Seoul (Korea): Hyundai development company; 2008 Feb. 126 p. Korean.
  2. Calson RW. editors. Dry shrinkage of concrete as affected by many factors. Proceedings of the 41st Annual Meeting of the American Society for Testing and Materials; Philadelphia (PA): America Concrete Institute; 1938. 419-40.
  3. Ferraris CF, Wittman FH. Shrinkage mechanism of hardened cement paste. Cement and Concrete Research. 1987 May;17(3):453-64. https://doi.org/10.1016/0008-8846(87)90009-3
  4. Kim TH, Kim HR, Jo HK, Kim GD, Seo SS. An experimental study on the analysis and the reduction of defects for Ondol wooden floor coverings in apartment housing. Journal of the Architectural Institute of Korea. 2009 Oct;29(1):503-6.
  5. Go SS, Lee JY. An experimental study on the crack prevention of the surface finishing mortar in Ondol floor structure. Journal of the Architectural Institute of Korea. 1998 May;14(4):369-77.
  6. Jung CH, Lee BH. A quality research as proportion of subslab concrete. Journal of the Korea Institute of Building Construction. 2009 Nov;9(2):308-8.
  7. Lee DG, Han SI, Choi DJ, Kang C, Kim JS, Kim JM. The experimental study on the plaster mortar using recycled fine aggregate. Journal of Korea Concrete Institute. 2008 Feb;20(1):473-6.
  8. Lee WY, Lee DG, Han SI, Kwak EG, Kim JW, Kim JM. The strength properties of Latex-modified mortar using recycled fine aggregate. Journal of the Korea Institute of Building Construction. 2009 Nov;9(2):179-182.
  9. Jung HY and Yun SH. The comparative study of cement flooring plastering and self leveling plastering in apartment ground floor. Journal of Korea Institute of Building Construction. 2009 Nov;9(2):308-8.
  10. Dong-San Corp. [Optimal estimation of the house of commons on the floor of a structure]. Seoul (Korea): Dong-San construction research institute; 1992. 110 p. Korean.
  11. Hwang JH. A study of auto horizontal function and crack suppression function with a mortar [master's thesis]. Seoul (Korea): Seoul National University; 1997. 70 p.
  12. Min CS. [Reinforced concrete]. 2nd ed. Seoul (Korea): Goomibook; 2010. 469 p. Korean.
  13. American Concrete Institute. Design for effects of creep, shrinkage and temperature in concrete structure. ACI SP-27, American Concrete Institute; 1971.
  14. Jo YG, So YS. A study on the moisture diffusion and shrinkage of polymer-modified mortars. Journal of he Architectural Institute of Korea. 1996 Nov;12(11):181-8.
  15. Troxell GE, Raphael JM, Davis RE. Influence of aggregate type on drying shrinkage and creep. Proceedings of the 61st Annual Meeting of the American Society for Testing and Materials; Philadelphia (PA): America Concrete Institute; 1958. p. 1102-20.
  16. Korea Concrete Institute. [2007 Revised Criteria of Structural Concrete]. 1st ed. Seoul (Korea): Kimundang; 2008. 523 p. Korean.
  17. Comit E. Euro-International Du B. Eton. CEB-FIP Model Code. 1st ed. London (UK): Thomas Telford Services Ltd.; 1993. 437 p.

Cited by

  1. Properties of Shrinkage Reducing Agent used C12A7-Based Slag according to Content of Admixtures vol.22, pp.6, 2013, https://doi.org/10.7844/kirr.2013.22.6.12
  2. Properties of Shrinkage Reducing Agent and Mortar with C12A7-based Slag and Petroleum Cokes Ash vol.50, pp.5, 2013, https://doi.org/10.4191/kcers.2013.50.5.319
  3. Properties of shrinkage reducing agent and mortar used Anhydrite and C12A7-based slag vol.1, pp.2, 2013, https://doi.org/10.14190/JRCR.2013.1.2.101