High Temperature Effects of Self-compacted Concrete : Experimental and Numerical Study Ash, GGBS Combinations

Author(s): D Harinadha Reddy and Ananth Ramaswamy
Paper category: Proceedings
Book title: Proceeding of the 71st RILEM Annual Week & ICACMS 2017
Editor(s): Manu Santhanam, Ravindra Gettu, Radhakrishna G. Pillai, Sunitha K. Nayar
ISBN:978-2-35158-195-7, 978-2-35158-190-2 (Set)
e-ISBN: 978-2-35158-191-9
Publisher: RILEM Publications SARL
Publication year: 2017
Pages: 165-174
Total Pages: 10
Language : English

Abstract:  Fire in concretes deteriorates mechanical properties of the material and lead to collapse under loads. Two types of spalling occurs in concrete when exposed to high temperature, namely explosive and thermal spalling. Explosive spalling occurs once the hydrostatic stress (developed due to pore pressure) exceeds the tensile strength of the concrete. Whereas thermal spalling of concrete happens due to degradation of material properties (elastic modulus, compressive and tensile strength) when exposed to high temperature. The present study comprises of an experimental and analytical program to assess the levels of deformations due to high temperature in different self-compacted concretes (SCC). Total four mixes has been studied to investigate the high temperature effects. In the total four mixes, three mixes are self-compacted concrete mixes (35 MPa, 55 MPa and SCC70 MPa) and one normal concrete mix (45 MPa). To increase the strength in SCC mixes different supplementary cementitious materials is added in addition to cement. The four mixes of concretes were tested with the external temperature of 25° C, 200° C, 374° C, 500° C, 700° C and 800° C. The residual compressive strength and elastic modulus of these were measured. A hygro mechanical model is implimented to estimate explosive and thermal spalling

Online publication :2017
Publication type :full_text
Public price (Euros) : 0.00

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