Rheological behaviour of fresh mortar formulated from self-compacting high performance concrete incorporating rice husk ash

Author(s): Ha Thanh Le, K. Siewert, Horst-Michael Ludwig
Paper category: Conference
Book title: Rheology and processing of Construction Materials – 7th RILEM International Conference on Self-Compacting Concrete and 1st RILEM International Conference on Rheology and Processing of Construction Materials
Editor(s): Nicolas Roussel and Hela Bessaies-Bey
Print ISBN: 978-2-35158-137-7
e-ISBN: 978-2-35158-138-4
Publisher: RILEM Publications SARL
Pages: 131-138
Total Pages: 8
Language: English

Abstract: 
This study investigated the effect of pore structure of rice husk ash (RHA) on rheological properties of mortar formulated from self compacting high performance concrete. Firstly, properties relating to pore structure of RHA were evaluated by scanning electron microscopy image, measurement of specific surface area, determination of pore volume and pore size in RHA particles, and by water demand test. Subsequently the effect of mean particle size and content of RHA on saturation dosage of superplasticizer and rheological properties of mortar was investigated. These properties were evaluated for reference and silica fume (SF) containing samples as well. The results show that the RHA was a porous material including macro and meso pores. Pore size distribution, namely macro pore content, played a key role in influencing other properties of RHA. Depending on particle size and content, blending RHA or SF with cement resulted in a significant change of rheological properties of mortar.

Online publication: 2013
Publication Type: full_text
Public price (Euros): 0.00