Coarse Aggregate Size Effect on Non-linear and Uncertainty Mechanical Behaviors for Concrete
A series of uniaxial compression tests and simulations were conducted to evaluate the influences of single coarse aggregate (CA) size on the mechanical properties of concrete and their uncertainties. In this research, the specimens of pure mortar matrix and specimens with diameter 15 mm and 30 mm of single spherical steel aggregate were fabricated and tested by a material testing system. Based on experimental results, the mechanical parameters, including the elastic modulus, compressive strength, strain at the peak stress and absorbed strain energy were investigated. It was found that larger size of CA results in higher elastic modulus and compressive strength. Meanwhile, the strain at peak stress and absorbed strain energy of concrete are non-linear with the size of CA. And then, the mechanical properties were analyzed in the aspect of ITZ which is closely related to the size of CA. In addition, simulation results were presented to discuss the stress distribution of different size CA in specimen. In conclusion, the CA size has significant effect on the uncertainty of elastic modulus, strain at the peak stress and absorbed strain energy, but has little effect on the compressive strength. The findings from the current study will help gain the insights into the non-linear and uncertain mechanical behaviors of concrete.
Coarse Aggregate Size Effect on Non-linear and Uncertainty Mechanical Behaviors for Concrete, Advances in Materials.
Vol. 8, No. 3,
2019, pp. 100-107.
Meddah, M. S., Zitouni, S. & Belâabes, S. (2010). Effect of content and particle size distribution of coarse aggregate on the compressive strength of concrete. Construction and Building Materials 24, 505-512.
Radovani, B. A. (1990). Grain size of adopted aggregate influence on strain-softening of concrete. Engineering Fracture Mechanics 35, 709-718.
Tasdemir, C., Tasdemir, M. A., Lydon, F. D. & Barr, B. I. G. (1996). Effects of silica fume and aggregate size on the brittleness of concrete. Cement and Concrete Research 26, 63-68.
Su, R. K. L. & Bei, C. (2008). The Effect of Coarse Aggregate Size on the Stress-strain Curves of Concrete under Uniaxial Compression. HKIE Transactions 15, 33-39.
Chen, B. & Liu, J. (2004). Effect of aggregate on the fracture behavior of high strength concrete. Construction and Building Materials 18, 585-590.
Vu, X. H., Daudeville, L. & Malecot, Y. (2011). Effect of coarse aggregate size and cement paste volume on concrete behavior under high triaxial compression loading. Construction and Building Materials 25, 3941-3949.
Sengul, O., Tasdemir, C. & Tasdemir, M. A. (2002). Influence of aggregate type on mechanical behavior of normal-and high-strength concretes. ACI Materials Journal 99, 528-533.
Zhou, F. P., Lydon, F. D. & Barr, B. I. G. (1995). Effect of coarse aggregate on elastic modulus and compressive strength of high performance concrete. Cement and Concrete Research 25, 177-186.
Elsharief, A., Cohen, M. D. & Olek, J. (2003). Influence of aggregate size, water cement ratio and age on the microstructure of the interfacial transition zone. Cement and Concrete Research 33, 1837-1849.
Ollivier, J. P., Maso, J. C. & Bourdette, B. (1995). Interfacial transition zone in concrete. Advanced Cement Based Materials 2, 30-38.
Liao, K.-Y., Chang, P.-K., Peng, Y.-N. & Yang, C.-C. (2004). A study on characteristics of interfacial transition zone in concrete. Cement and Concrete Research 34, 977-989.
Scrivener, K., Crumbie, A. & Laugesen, P. (2004). The Interfacial Transition Zone (ITZ) Between Cement Paste and Aggregate in Concrete. Interface Science 12, 411-421.
Lee, G. C. & Choi, H. B. (2013). Study on interfacial transition zone properties of recycled aggregate by micro-hardness test. Construction and Building Materials 40, 455-460.
Lee, K. M. & Park, J. H. (2008). A numerical model for elastic modulus of concrete considering interfacial transition zone. Cement and Concrete Research 38, 396-402.
Zhu, W. & Bartos, P. J. M. (2000). Application of depth-sensing microindentation testing to study of interfacial transition zone in reinforced concrete. Cement and Concrete Research 30, 1299-1304.
Prokopski, G. & Halbiniak, J. (2000). Interfacial transition zone in cementitious materials. Cement and Concrete Research 30, 579-583.
Tasong, W. A., Lynsdale, C. J. & Cripps, J. C. (1999). Aggregate-cement paste interface: Part I. Influence of aggregate geochemistry. Cement and Concrete Research 29, 1019-1025.
Hu, J. & Stroeven, P. (2004). Properties of the Interfacial Transition Zone in Model Concrete. Interface Science 12, 389-397.
Zheng, J. J., Li, C. Q. & Zhou, X. Z. (2005). Characterization of microstructure of interfacial transition zone in concrete. ACI materials journal 102, 265-271.
Yue, L. & Shuguang, H. (2001). The microstructure of the interfacial transition zone between steel and cement paste. Cement and Concrete Research 31, 385-388.
Akçaoğlu, T., Tokyay, M. & Çelik, T. (2004). Effect of coarse aggregate size and matrix quality on ITZ and failure behavior of concrete under uniaxial compression. Cement and Concrete Composites 26, 633-638.
Igarashi, S.-i., Bentur, A. & Kovler, K. (2000). Autogenous shrinkage and induced restraining stresses in high-strength concretes. Cement and Concrete Research 30, 1701-1707.
Yang, I. H. (2007). Uncertainty and sensitivity analysis of time-dependent effects in concrete structures. Engineering Structures 29, 1366-1374.
Golewski, G. L. (2018). An assessment of microcracks in the interfacial transition zone of durable concrete composites with fly ash additives. Composite Structures, 200, 515-520.
Simon, K. M., & Kishen, J. M. C. (2018). A multiscale model for post-peak softening response of concrete and the role of microcracks in the interfacial transition zone. Archive of Applied Mechanics, 88 (4), 1-15.