Experimental Investigations on Temperature Gradient in Massive Raft Foundation | ||||
| JES. Journal of Engineering Sciences | ||||
| Article 1, Volume 50, Issue 2, March and April 2022, Page 47-58 PDF (938.06 K) | ||||
| Document Type: Research Paper | ||||
| DOI: 10.21608/jesaun.2022.105593.1088 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
Samiha E. Alharthy  1; Osama A. Hodhod2; Tian Wei3
| ||||
| 1Researcher, Construction Research Institute, NWRC, Cairo, Egypt | ||||
| 2Professor, Structural Engineering Department, Faculty of Engineering, Cairo University, Giza, EGYPT | ||||
| 3Chief Engineer of Iconic Tower Project, CSCEC-Egypt. | ||||
| Abstract | ||||
| Thermal cracks are the major problem as temperature increases in massive concrete structures. It is imperative to investigate the temperature rise and to find effective techniques to control the heat of hydration of massive concrete. In this research, based on a segmental model test of high rise building raft, the temperature field for the bottom, middle and top surface concrete of the raft caused by the heat of hydration were measured. Blast furnace slag cement (CEM III/A 42.5N) was used due to its lower percentage of C3A and C3S and lower surface area. The tested temperature rise curves indicated that the temperature increases quickly but diminishes gradually. The maximum temperature rise at the middle surface of the concrete reached 56oC, and the maximum temperature difference between the middle and the top surface was 15.80oC. The most extreme temperature difference between the top surface and the surrounding environmental temperature was 26.5oC. So, using slag cement controlled the heat of hydration of concrete leading to environmentally friendly concrete mixes. | ||||
| Keywords | ||||
| KEYWORDS: Hydration heat; Blended cement; Blast Furnace Slag; Temperature Gradient | ||||
| References | ||||
|
[1] B. Agathe, B. Laury, B. Laetitia, C. Florian, T. Jean Michel, J. Aurelien, "Optimization of concrete mix design to account for strength and hydration heat in massive concrete structures", Cement Concr. Compos. 103 (2019) 233–241
[2] IFSTTAR, Recommendations for Preventing Disorders Due to Delayed Ettringite Formation - Technical Guide, (2018).
[3] M. Al Shamaa, S. Lavaud, L. Divet, G. Nahas, J.M. Torrenti, "Influence of relative humidity on delayed ettringite formation", Cement Concr. Compos. 58 (2015) 14–22
[4] G. De Schutter, L. Taerwe, "Degree of hydration-based description of mechanical properties of early age concrete", Mater. Struct. 29 (1996) 335–344.
[5] F. de Larrard, "Concrete Mixture Proportioning", A Scientific Approach - CRC Press Book, 1999.
[6] C. Chandara, K.A.M. Azizli, Z.A. Ahmad, S.F.S. Hashim, "Heat of hydration of blended cement containing treated ground palm oil fuel ash". Constr. Build. Material. (2012) 78-81.
[7] M.Nili, A.M. Salehi, "Assessing the effectiveness of pozzolans in massive high- strength concrete". Constr. Build. Mater. (2010) 2108-2116.
[8] P.B. Bamforth, P.B. "In situ measurement of the effect of partial Portland cement replacement using either fly ash or ground granulated blast furnace slag on the performance of mass concrete". Proc. Inst. Civ. Eng. (1980) 777-800.
[9] A.K. Schindler, K.J. Folliard, "Influence of supplementary cementing materials on the heat of hydration of concrete". In: Advances in Cement and Concrete IX Conference, Opper Mountain Conference Resort, Colorado, USA., (2003).
[10] Kolani B., Buffo-Lacarriere L., Sellier A., Escadeillas G., Boutillon L., and Linger L., “Hydration of Slag-Blended Cements”, Cem. Concr. Compos. 2019, 34, pp. 1009–1018.
[11] Oner M., Erdogdu K. and Gunlu A., “Effect of Components Fineness on Strength of Blast Furnace Slag Cement”, Cement. Concrete. 2003, Res. 33, pp. 463–469.
[12] Chen W, “Hydration of Slag Cement-Theory”, Modelling and Application; Construction Management and Engineering: Enschede, the Netherlands, 2007.
[13] Juenger M.C.G., Winnefeld F., Provis J.L. and Ideker J.H., “Advances in Alternative Cementitious Binders”, Cem. Concr. Res. 2011, 41, pp. 1232–1243.
[14] Chung C.W., Um W., Valenta M.M., Sundaram S.K., Chun J., Parker K.E., Kimura M.L. and Westsik J.H., “Characteristics of Cast Stone Cementitious Waste form for Immobilization of Secondary Wastes from Vitrification Process”, J. Nucl. Mater. 2012, 420, pp. 164–174.
[15] H. Zhao, W. Sun, B. Gao. "The properties of the self-compacting concrete with fly ash and ground granulated blast furnace slag mineral admixtures". J. Clean. Prod., (2015).
[16] A. Darquennes, B. Espion, S. Staquet, "How to assess the hydration of slag cement concretes" Constr. Build. Mater. (2013) 1012-1020.
[17] W.A. Gutteridge, J.A. Dalziel, "the effect of the secondary component on the hydration of Portland cement": part 2: Fine hydraulic binders, Cement. Concrete. Res., (1990) 853-861.
[18] Egyptian Code of Practice (ECP) for Design and Execution of Reinforced Concrete Structures, Guide for Laboratory Tests of Concrete Materials, 2007. | ||||
|
Statistics Article View: 360 PDF Download: 585 |
||||
