Experimental Studies on the Properties of Metakaolin Blended Self- Compacting Coconut Shell Lightweight Concrete

Author(s): Idowu H. Adebakin, Gunasekaran Kandaswamy and Annadurai Ramasamy
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: 71-80
Total Pages: 10
Language : English

Abstract: Coconut shell aggregate concrete (CSAC) is gaining popularity due to its eco-friendliness and sustainability characteristics. This study focuses on the effect of metakaolin (MTK) on fresh, microstructure and hardened properties of self-compacting lightweight concrete produced with coconut shell (CS) as coarse aggregate. MTK was used as partial replacement of ordinary Portland cement (OPC) at replacement level of 10%, 15% and 20% by weight. Slump flow, T500, V-funnel flow, L-box and wet sieve segregation tests were performed on the fresh concrete, while compressive strength, splitting tensile and flexural strength tests were carried-out on the hardened concrete. The microstructural changes were also studied using scanning electron microscope (SEM) and energy dispersive X-ray Analysis (EDX). The results of the study shows that inclusion of MTK greatly improved both the rheological and hardened properties of the concrete with substantial reduction in the micro cracks width due to the pozzolanic action of MTK. Specimen with 15% MTK replacement level gave best results both in fresh and hardened state.

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