Synergic Effect of Rice Husk Ash and Silica Fume on Compressive Strength of Ultra High Performance Concrete

Title: Synergic Effect of Rice Husk Ash and Silica Fume on Compressive Strength of Ultra High Performance Concrete
Author(s): Nguyen Van Tuan, Guang Ye, Klaas van Breugel, Pham Huu Hanh
Paper category : conference
Book title: International RILEM Conference on Material Science
Editor(s): W. Brameshuber
Print-ISBN: 978-2-35158-110-0
e-ISBN: 978-2-35158-111-7
Publisher: RILEM Publications SARL
Publication year: 2010
Pages: 255 - 263
Total Pages: 9
Nb references: 17
Language: English

Abstract: The limited available resource and the high cost of silica fume (SF) for producing ultra high performance concrete (UHPC) give the motivation for searching for an other material with similar functions, especially in developing countries. Rice husk ash (RHA), an agricultural waste, is also classified as "a highly active pozzolan" because it possesses a very high amount of amorphous SiO2 and a huge surface area. The objective of this paper is to study the mechanical properties of UHPC incorporating RHA. Two binary blends of mortar substituting 20% cement with RHA and SF, and three combinations of a ternary blend with (5 / 15)%, (10 / 10)% and (15 / 5)% mix ratios of SF and RHA, together with a control sample, were subjected to compression test till 91 days with and without heat treatment. The results show that UHPC incorporating RHA can be produced. RHA can be used as a SF replacement without significant affecting mechanical properties. Ternary blend with (10 / 10)% combination of RHA and SF showed better strength results than control and other blends and proved to be the optimum combination for achieving maximum synergic effect.

Online publication: 2010-12-02
Publication type : full_text
Public price (Euros): 0.00