Experimental Investigations on Fracture Parameters of Recycled Aggregate Concrete

Author(s): Bhashya V and Bharat kumar B. H
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: 333-340
Total Pages: 8
Language : English

Abstract:  The fracture energy of concrete is strongly influenced by the quality of the aggregate, the water-cement ratio and the size of the aggregate. In the present study, experimental investigations were carried out to determine the fracture parameters (fracture energy and fracture toughness) on concrete made with recycled concrete aggregate (with and without any treatment). The effect of fly ash/silica fume for replacement of RCA has also been investigated. The geometrically similar beam specimens having constant notch-depth/beam depth ratio of 0.2 and span/depth ratio of 4 were cast. The results show that the use of recycled aggregate without any treatment resulted in a significant reduction in concrete fracture energy and fracture toughness when compared with the control concrete. The fracture parameters for treated RCA concrete were found to be improved due to the reduction in the attached mortar of the RCA after heat treatment. Use of fly ash or silica fume improved the fracture energy and fracture toughness of recycled aggregate concrete.

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