고강도 콘크리트의 역학적 특성에 대한 실험 연구
An Experimental Study of Mechanical Properties of High-strength Concrete
1
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
이 연구에서는 고강도 콘크리트의 역학적 특성을 파악하기 위한 실험연구를 수행하였다. 80~120 MPa 범위의 압축강도를 갖는 고강도 콘크리트를 대상으로 실험연구를 수행하였다. 물-결합재비의 압축강도에 대한 영향, 시간에 따른 압축강도의 발현 및 양생조건의 압축강도에 대한 영향을 분석하였다. 또한, 양생조건에 따른 콘크리트의 탄성계수, 쪼갬인장강도 및 파괴계수 특성을 파악하였다. 탄성계수, 쪼갬인장강도 및 파괴계수의 실험결과와 기존설계코드에 의한 예측결과를 비교하였다. 콘크리트구조기준의 탄성계수 제안식은 실험값을 합리적으로 예측한다. 반면에, 콘크리트구조기준은 파괴계수 실험값을 과소평가하고 있다. ACI 363R의 쪼갬인장강도와 파괴계수 예측값과 실험값은 잘 일치하고 있다. 따라서, ACI 363R의 쪼갬인장강도와 파괴계수 예측식은 120 MPa까지의 고강도 콘크리트에 효과적으로 활용될 수 있다.
Abstract
An experimental program was carried out to investigate the mechanical properties of high-strength concrete. High-strength concrete with compressive strengths of 80 to 120 MPa was tested. Test results are presented regarding effect of water-binder ratio on compressive strength and compressive strength gain. In addition, the effect of curing methods on compressive strength, elastic modulus, splitting tensile strength, and modulus of rupture is investigated. Test results of elastic modulus, splitting tensile strength, and modulus of rupture are compared with predictions from the current design recommendations. Predictions of elastic modulus by using KCI recommendation has good agreement with test results. However, predictions of modulus of rupture by using KCI recommendation underestimate the test results. ACI 363R recommendations predict well test results of splitting tensile strength and modulus of rupture. ACI 363R recommendations for predicting splitting tensile strength and modulus of rupture can be used for high-strength concrete with compressive strengths up to 120 MPa.
참고문헌 (18)
- AASHTO LRFD, "Bridge Design Specifications" (2014), American Association of State Highway and Transportation Officials
- Building Code Requirements for Structural Concrete and commentary (318-14), "ACI Committee 318", American Concrete Institute, 503~ (2014)
- Report on High-Strength Concrete(ACI 363R-10), "ACI Committee 363", American Concrete Institute, 65~ (2010)
- Aïtcin, P. C., "Effects of Size and Curing on the Cylinder Compressive Strength of normal and High-Strength Concrete", ACI Materials Journal, 91(4), pp.349~355 (1994)
- Arshad, A. K., "Early Age Compressive Stress-Strain Properties of Low, Medium, and High- Strength Concretes", ACI Materials Journal, 92(6), pp.617~624 (1995)
- Asselanis, J. G., "Effect of Curing Conditions on the Compressive Strength and Elastic Modulus of Very High-Strength Concrete", Cement, Concrete, and Aggregates, 11(1), pp.80~83 (1989)
- Assessment of Concrete Strength in Existing Structures, "Bartlett, F. M.", Department of Civil Engineering, University of Alberta, 297~, pp.Structural Engineering Report, No. 198 (1994)
- Carrasquillo, R. L., "Properties of High Strength Concrete Subject Short-Term Loads", ACI Structural Journal, 78(3), pp.161~178 (1981)
- Chin, M. S., "Effects of Shape, Size and Casting Direction of Specimens on Stress-Strain Curves of High-Strength Concrete", ACI Materials Journal, 94(3), pp.209~218 (1997)
- Iravani, S., "Mechanical Properties of High-Performance Concrete", ACI Materials Journal, 93(5), pp.416~425 (1996)
- KCI, "Design Code for Structural Concrete", Korea Concrete Institute, ~ (2012)
- Légeron, F., "Prediction of Modulus of Rupture of Concrete", ACI Materials Journal, 97(2), pp.193~200 (2000)
- Mokhtarzadeh, A., "Mechanical Properties of High-Strength Concrete with Consideration for Precast Applications", ACI Materials Journal, 97(2), pp.136~148 (2000)
- Neville, A. M., "Properties of Concrete", pp.844~ (1995), J. Wiley
- Simplified Methods of Predicting the Deformation of Structural Concrete, "Parrott, L. J.", Cement and Concrete Association, 11~, pp.Development Report, No.3 (1979)
- Sarkar, S. L., "Dissolution Rate of Silica Fume in Very High-Strength Concrete", Cement and Concrete Research, 17, pp.591~601 (1987)
- Wee, T. H., "Stress-Strain Relationship of High-Strength Concrete in Compression", Journal of Materials in Civil Engineering, 8(2), pp.70~76 (1996)
- Zhang, D., "Fracture Properties of High-Strength Concrete", Journal of Materials in Civil Engineering, 13(1), pp.86~88 (2001)