Influence of ugandan volcanic scoria as aggregates in concrete

Author(s): Stephen O. Ekolu, Kgashane T. Moila, Mikaash Bhagwager, Harry Quainoo
Paper category: Proceedings
Book title: SynerCrete’18: Interdisciplinary Approaches for Cement-based Materials and Structural Concrete: Synergizing Expertise and Bridging Scales of Space and Time Vol. 1 & 2
Editor(s): Miguel Azenha, Dirk Schlicke, Farid Benboudjema, Agnieszka Jędrzejewska
ISBN: 978-2-35158-202-2
e-ISBN: 978-2-35158-203-9
Publisher: RILEM Publications SARL
Publication year: 2018
Pages: 249-254
Total Pages: 6
Language : English

Abstract: This paper presents an investigation conducted on potential use of volcanic scoria as fine and coarse aggregates in concrete. In some developing countries, volcanic scoria is a widely available natural pozzolan which is presently not fully exploited for construction applications. In the present study, mortar mixtures of 3.0 aggregate/cement ratio and 0.5 water/cement ratio (w/c) or concretes of 0.6 w/c were used. Mortar samples of 50 mm cubes and 25 x 25 x 285 mm prisms containing 100% volcanic scoria aggregate (VAG) were prepared then used to determine compressive strength and drying shrinkage. In addition, concretes of 0.6 w/c containing 0, 50 or 100% VAG were used to prepare 70 dia x 140 mm height cylinders for measurement of elastic modulus. It was found that VAG mixtures gave slightly higher drying shrinkage than the control, while compressive strength and elastic modulus decreased significantly as the proportion of VAG aggregate content increased.

Online publication : 2018
Publication type : full_text
Public price (Euros) : 0.00