İ. Raci Bayer, Lutfullah Turanli, P. Kumar Mehta

MASS CONCRETE CONSTRUCTION USING SELF-COMPACTING MORTAR

Risk of thermal cracking is a well-known problem in mass concrete structures. One of the steps in mitigating this problem is to keep the initial placement temperature of concrete as low as possible. From this standpoint, Preplaced Aggregate Concrete (PAC) is advantageous because the friction among the coarse aggregate particles during the mixing operation causes the initial temperature of concrete to rise. Making PAC by the conventional method of grout injection requires special equipment and skilled workers. An alternative method using a self-compacting mortar for grouting preplaced aggregate was investigated in this study. Using different concrete compositions made with locally available cementitious materials and aggregate fractions, massive concrete cubes, each 1 m.were prepared. The specimens were tested for thermal and mechanical properties. In addition to low temperature rise that is suitable for mass concrete, the PAC method produced concrete specimens with compressive strength and modulus of elasticity values comparable to conventional concrete.

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Abdelgader, H. S., 1996. Effect of quantity of sand on the compressive strength of two-stage concrete. Mag.Concr. Res. 48(177): 353-360
Abdelgader, H. S., and Górski, J., 2002. Influence of grout proportions on modulus of elasticity of two-stage concrete. Mag.Concr. Res. 54(4): 251-255
Abdelgader, H. S., and Górski, J., 2003. Stress-strain relations and modulus of elasticity of two-stage concrete. J. Mater. Civ. Eng. 15(4): 329-334
Abdelgader, H. S., and Ben-zeitun, A. E., 2004. Effect of grout proportions on tensile strength of two-stage concrete measured by split and double-punch tests. Structural Concrete 5(4): 173-177
Abdelgader, H. S., Ben-Zeitun, A. E., Saud, A. F. and Elgalhud, A. A., 2006. Mechanical Behavior of TwoStage (Pre-placed Aggregate) Concrete. The 10th Arab Structural Engineering Conference, Kuwait
Abdelgader, H. S. and Elgalhud, A. A., 2008. Effect of grout proportions on strength of two-stage concrete. Structural Concrete 9(3): 163-170
ACI Committee 116 (116R-00), 2008. Cement and Concrete Terminology Part I: ACI Manual of Concrete Practice
ACI Committee 207 (207.1R-05), 2008. Mass Concrete Part II: ACI Manual of Concrete Practice
ACI Committee 304 (304.1R-92), 2008. Guide for the Use of Preplaced Aggregate Concrete for Structural and Mass Concrete Applications Part II: ACI Manual of Concrete Practice
ACI Committee 318 (ACI 318-14), 2015. Commentary on Building Code Requirements for Structural Concrete: American Concrete Institute
Afshinnia, K., and Poursaee, A., 2015. The potential of ground clay brick to mitigate Alkali–Silica Reaction in mortar prepared with highly reactive aggregate Const. Build. Mater. 95: 164-170
ASTM C 150, 2012. Standard specification for Portland cement, American Society of Testing and Materials, West Conshohocken, PA: ASTM International
ASTM C 595, 2000. Standard Specification for Blended Hydraulic Cements. American Society of Testing and Materials, West Conshohocken, PA: ASTM International
ASTM C618-15, 2015. Standard Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in Concrete, American Society of Testing and Materials, West Conshohocken, PA: ASTM International
Akgüngör, A., Sevim, Ö., Kalkan, İ. and Demir, İ., 2018. Restrained Shrinkage Cracking of Self-Consolidating Concrete Roads. Sci. Eng. Compos. Mater. 43:112
Baumann, P., 1948 Use of Prepacked Aggregate Concrete in Major Dam Construction. ACI Journal Proceedings, 20(3): 229-236
Baronio, G., and Binda, L., 1997. Study of the Pozzolanicity of Some Bricks and Clays. Const. Build. Mater. 11(11): 41-46
Davis, H. E., 1958. High-Density Concrete for Shielding Atomic Energy Plants. ACI Journal Proceedings 54(11): 965-977
Davis, R. E., 1960. Prepakt method of concrete repair. In Journal Proceedings (Vol. 57, No. 8, pp. 155-172).
Degryse, P., Elsen, J. and Waelkens, M., 2002. Study of Ancient Mortars from Sagalassos (Turkey) in view of Their Construction. Cem. Concr. Res. 32: 1457-1463
Demir, İ., Sevim, Ö. and Tekin, E., 2018. The Effects of Shrinkage-reducing Admixtures Used in SelfCompacting Concrete on its Strength and Durability, Const. Build. Mater. 172: 153-165
EN T S 197-1, 2012. Cement-Part 1: Composition, specifications and conformity criteria for common cements, Ankara: Turkish Standards Institute
Kishar, E. A., Ahmed, D. A., Mohammed, M. R. and Noury, R., 2013. Effect of calcium chloride on the hydration characteristics of ground clay bricks cement pastes. Beni-Suef university journal of basic and applied sciences, 2(1): 20-30
Mehta, P. K., and Monteiro, P. J. M., 2005. Concrete: Microstructure, Properties, and Materials. New York: McGraw-Hill
Moropolou, A., Çakmak, A. S. and Lohvyn, N., 2000. Earthquake Resistant Construction Techniques and Materials on Byzantine Monuments in Kiev. Int. J. Soil Dyn. Earthquake Eng. 19: 603-615
Nowek, A., Kaszubski, P., Abdelgader, H. S. and Górski, J., 2007. Effect of admixtures on fresh grout and twostage (Pre-placed aggregate) concrete. Structural Concrete 8(1): 17-23
Rajabi, A. M. and Moaf, F. O., 2017. Simple empirical formula to estimate the main geomechanical parameters of preplaced aggregate concrete and conventional concrete. Constr. Build. Mater. 146: 485-492
Turanlı, L., Bektaş, F. and Monteiro, P. J. M., 2003. Use of Ground Clay Brick as a Pozzolanic Material to Reduce the Alkali-Silica Reaction. Cem. Concr. Res. 33: 1539- 1542
Waterways Experiment Station (U.S.)., 1954. Investigation of the Suitability of Prepakt Concrete for Mass and Reinforced Concrete Structures: Appendices A and B, report. Vicksburg, Mississippi. (digital.library.unt.edu/ark:/67531/metadc853010/: accessed September 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.