Laboratory evaluation of effects of water proof admixtures and supplementary cementitious materials on durability of concrete used in hot climate

Author(s): M. Sonebi
Paper category: Workshop
Book title: International RILEM Workshop on Performance Based Evaluation and Indicators for Concrete Durability
Editor(s): V. Baroghel-Bouny, C. Andrade, R. Torrent, K. Scrivener
ISBN: 978-2-912143-95-2
Pages: 359 - 368
Total Pages: 10
Language: English

Abstract: 
This paper presents the results of a study carried out to investigate the effects of the incorporation of ground granulated blastfurnace slag (GGBS), silica fume (SF) as binary and ternary mixes, and also the addition of waterproof admixtures on the slump retention, the mechanical performance, and the durability of concrete required to be used for sub-structure concrete in hot climate. Two types of water proof admixtures were used (WP1 and WP2). The water/cementitious materials (W/CM) ratio was 0.35 to secure specified compressive strength of class C50. Four binder compositions were used: a Portland cement; cement with 50% to 70% GGBS (binary mix); cement with 46% GGBS and 7% SF (ternary mix), and a binary blended mix containing 8% SF.
Test results indicate that using ternary mixes with GGBS and SF improve the slump retention, and satisfied the requirement of the compressive strength. Better durability can be secure by using GGBS, silica fume, and water proof WP2 in terms of reducing the water penetration, the water absorption and the rapid chloride permeability of concrete.

Online publication: 2007
Publication Type: full_text
Public price (Euros): 0.00