INVESTIGATIONS OF EARLY AGE THERMAL CRACKING OF MASS CONCRETE WITH GGBFS AND FLY ASH

Author(s): Muneer K. Saeed, Mohammed H. Baluch, Muhammad K. Rahman, and Khaldoon Slayee
Paper category: Proceedings
Book title: Proceedings of CONSEC13 Seventh International Conference on Concrete under Severe Conditions - Environment and Loading Volume I
Editor(s): Z.J. Li, W. Sun, C.W. Miao, K.Sakai, O.E. Gjørv, N.Banthia
ISBN: 978-2-35158-124-7
e-ISBN: 978-2-35158-134-6
Publisher: RILEM Publications SARL
Publication year: 2013
Pages: 583-595
Total Pages: 961
Language : English

Abstract: This paper presents the results of an experimental investigation on the use of Ground Granulated Blast Furnace Slag (GGBFS) and Fly Ash in mass concrete applications in Saudi Arabia in reducing the heat of hydration produced at an early age. The hydration induced temperature rise of concrete containing various percentages of GGBFS and Fly Ash type F was determined using semi adiabatic iQdrum heat signature calorimeter. Concrete mixes with cement replacement levels of 20%, 30%, 40%, 50% and 60% by GGBFS and Fly Ash were studied. The evolution of mechanical properties including compressive strength, and tensile strength of these concrete mixes with time was measured. Finite element investigations of a 3m×3m×3m concrete block with various percentages of GGBSS and Fly Ash were carried out using the software DIANA and the data obtained from semi-adiabatic calorimeter. The temperature distribution and thermal stresses and the associated cracking were computed and the risk of cracking was predicted. A parametric study was carried out to study the effect of size of the concrete mock-up specimen, mix type, and steel reinforcement on temperature rise and cracking index. Finite element analysis of mass concrete applications provides a valuable insight into the response of the concrete element for various mixes under varying environmental factors.

Online publication : 2013
Publication type : full_text
Public price (Euros) : 0.00