Influence of Material Factors on Estimation of Compressive Strength of Concrete by P Type Schmidt Rammer

- Journal title : Journal of the Korea Concrete Institute
- Volume 16, Issue 4, 2004, pp.459-465
- Publisher : Korea Concrete Institute
- DOI : 10.4334/JKCI.2004.16.4.459

Title & Authors

Influence of Material Factors on Estimation of Compressive Strength of Concrete by P Type Schmidt Rammer

Han Cheon-Goo; Lee Yong-Sung; Han Mn-Cheol;

Han Cheon-Goo; Lee Yong-Sung; Han Mn-Cheol;

Abstract

The present paper is intended to investigate the influence of materials such as cement, mineral admixture and aggregate, on the estimation of compressive strength by P type schmidt hammer. According to the results, the materials of concrete, such as the types of cement, the replacing ratio of mineral admixture, the kinds and maximum size of aggregate, hardly influence on non-destructive test by P type schmidt hammer except for alumina cement, hence, P type schmidt can be applicable to most of the concrete with a wide range. Since the correlativity between the rebound value of P type schmidt hammer and compressive strength is very favorable(above coefficient of correlation 0.96) regardless of materials, it is considered that compressive strength can be estimated comparatively exactly by P type schmidt hammer. The estimating formula of compressive strength by rebound value are derived from this experiment as following. Horizontal strike : Fc = 0.765RH - 5.74 (R=0.965) Vertical strike Fc = 0.793RV - 8.66 (R=0.959)

Keywords

P type schmidt hammer;estimation of compressive strength;material factor;kinds of cement;replacing ratio of mineral admixture;

Language

Korean

References

1.

日本建築學會, 'コンクリート強度推定のための非破壞試驗方法マニユアル', 日本建築學會, 1982, pp.35-87

2.

김기정, 신병호, 이용성, 윤기원, 한천구, '콘크리트의 초기강도 품질관리를 위한 P형 슈미트해머 비파괴시험에 관한 연구', 한국콘크리트학회 학술발표논문집, 14권 1호, 2002,. 5, pp.157-162

3.

明石外世樹, 'コンクリートの非破壞試驗法', 株式會社技報堂, 1980. 8, pp.11-81

4.

한국콘크리트학회, '최신 콘크리트공학', 기문당, 1997, pp.402-407

5.

이백수, 한천구, '제주지역 골재를 이용한 콘크리트의 슈미트해머법 비파괴시험 적용', 대한건축학회논문집, 18권 3호, 2002. 3, pp.91-98

6.

한국콘크리트학회, '콘크리트 구조물의 비파괴 검사 및 안전진단', 기문당, 1996, pp.25-90