Redefining Existing Concrete Compressive Strength Acceptance Standard in Iran Concrete Code (ABA), by Experimental Data
Abstract
In Iran Concrete Code (ABA), the criteria for calculation of standard deviation (s) are comprehensive and holistic. However, if it would be determined separately for each geographical area, significant changes could occur due to the use of concrete as one of the common materials. This paper analyses the criteria and redefines the acceptance standards for concrete compressive strength in ABA using experimental data available in Kohgiluyeh and Boyer-Ahmad and Fars provinces. The main hypothesis of the study is that using the statistical analysis of the test specimens for three categories C21, C30 and C35 in various projects located in Kohgiluyeh and Boyer-Ahmad and Fars provinces, extracting standard deviations, mean and the compressive strength of the specimens and their comparison with ABA proposed relationships and values, it is possible to propose new amendments for these areas in line with economic savings in national and international projects. In this study using the quantitative Strategy, library - Internet studies, field studies and in cooperation with the concrete labs, required information for 4878 concrete specimens was collected from the above-mentioned areas. By analysing the acceptance regulations for the specimens based on ABA and comparing the standard deviation of these data with the formulas of the regulations, significant results were obtained for the standard deviation factor correction and finally some formulas were suggested for the acceptance of the concrete specimens.
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References
S. G. Hansen, J. T. Lauridsen, and L. C. Hoang, “Experimental and statistical investigation of the compressive strength anisotropy in structural concrete”, Cement and Concrete Research, 107 (2018): 304–316, doi:10.1016/j.cemconres.2018.02.011.
Daftar-e tadvin va tarvij-e moqarrarāt-e melli-ye sāxtemān, “Tarh va ejrā-ye sāxtemānhā-ye betonārmeh [Design and construction of concrete structures]”. 4th ed. Tehran: Toseʿe-ye Iran Press, (2013).
American Concrete Institute, Building code requirements for structural concrete (ACI 318-08) and commentary. Translated by M. Davoud-Nabi, A. Ghorbani & M. Lajvardi. Tehran: Elm-e Omrān Press, (2008).
Institute of Standards and Industrial Research of Iran, Taʿyin-e moqāvemat-e fešāri-ye āzmunehā-ye beton: estāndārd-e 3206 (Determining the compressive strength of concrete specimens: Standard 3206). Tehran, (1992).
American Concrete Institute, Building Code Requirements for Structural Concrete (ACI 318-95) and Commentary (ACI 318R-95).MI: Farmington Hills, (1996).
Li, D., Li, Z., Lv, C., Zhang, G., & Yin, Y., “A predictive model of the effective tensile and compressive strengths of concrete considering porosity and pore size”, Construction and Building Materials, 170 (2018): 520–526. doi:10.1016/j.conbuildmat.2018.03.028.
Beaudoin, J.J., Feldman, R.F., Tumidaiski, P.J., “Pore structure of hardened Portland cement pastes and its influence on properties”, Adv. Cem. Based Mater. 1 (5) (1994): 224–236, doi: 10.1016/1065-7355(94)90028-0.
Röβler, M., Odler, I., “Investigations on the relationship between porosity, structure and strength of hydrated Portland cement pastes I. effect of porosity”, Cem. Concr. Res. 15 (2) (1985): 320–330, doi: 10.1016/0008-8846(85)90044-4.
Zhang, G., Li, Z., Zhang, L., Shang, Y., & Wang, H., “Experimental research on drying control condition with minimal effect on concrete strength”, Construction and Building Materials, 135 (2017): 194–202, doi:10.1016/j.conbuildmat.2016.12.141.
Hughes, B. P., Ash, J. E., “Anisotropy and failure criteria for concrete”, Matériaux et Constructions, 3(6) (1970): 371–374. Doi: 10.1007/bf02478760.
Johnston, C., “Anisotropy of concrete and its practical implications”, Highway Research Record, 423 (1973): 11–16.
Mehta, P., & Leshchinsky, A. (1990). “Anisotropy of Concrete Strength. Cement”, Concrete and Aggregates, 12(2) (1990), 117. Doi: 10.1520/cca10280j
F.M. Bartlett, MacGregor JG, “Cores from High-Performance Concrete Beams”, (1995). ACI Materials Journal, 91(6) (1995): 567-576, doi: 10.14359/1377.
ERGÜN, A., KÜRKLÜ, G., “Assessing the relationship between the compressive strength of concrete cores and molded specimens”, Gazi University Journal of Science, 25 (3) (2012): 737–750.
J.G.M. Van Mier, “Strain-softening of Concrete under Multiaxial Loading Conditions”, Technische Hogeschool Eindhoven, (1984).
Den Uijl, J.A., Yang, Y., “Comparative Study of Shear Capacity on Beams of 50-years Old and New Concrete - Measuring Report”, Internal report Delft University of Technology, (2009).
Van Mier, J.G., “Fracture Processes of Concrete”, CRC Press, (2017). Doi: 10.1201/b22384.
Sharon Hoo Xi., Al-Omaishi N., Tadros, M. K., “Creep, Shrinkage, and Modulus of Elasticity of High-Performance Concrete”, ACI Materials Journal, 98(6) (2001): 440-449. doi: 10.14359/10842
Hillemeier, B.H.A., “High Performance Concrete Specialized for Acid Resistance”, Concrete and Development First International Conference, Tehran, Iran, (2001).
Mostofinejad D. (2011). “Tarrāhi-ye sāzehā-ye beton ārmeh [Design of reinforced concrete structures]”, 3rd Edition, Tehran: Arkān-e Dānesh.
American Concrete Institute, “Building Code Requirements for Structural Concrete and commentary (ACI 318R-05)”, MI: Farmington Hills, (2005).
American Concrete Institute, “Building Code Requirements for Structural Concrete (ACI 318M-02) and commentary (ACI 318R02)”, MI: Farmington Hills, (2005)
Sāzmān-e modiriyat va barnāmerizi-ye kešvar, moāvenat-e omur-e fanni, daftar-e omur-e fanni va tadvin-e meʿyārhā. “Āyin nāme-ye beton-e Iran (ĀBĀ) [Iran Concrete Regulation]”. Tehran: Management and Planning Organization of Iran Press, (2014).
DOI: 10.28991/cej-0309162
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