Microstructural Modification of Strain Hardening Cementitious Composites Due to the Type of Fine Sand and Matrix

Author(s): M. Iqbal Khan and Galal Fares
Paper category: Proceedings
Book title: 3rd International RILEM Conference on Microstructure Related Durability of Cementitious Composites
Editor(s): Changwen Miao, Wei Sun, Jiaping Liu, Huisu Chen, Guang Ye and Klaas van Breugel
Print-ISBN: 978-2-35158-188-9
e-ISBN: 978-2-35158-189-6
Publisher: RILEM Publications SARL
Publication year: 2016
Pages: 484-492
Total Pages : 9
Language : English

Abstract: The use of fine sand in the preparation of strain hardening cementitious composites (SHCC) is found as substantial as the other constituents. The natural sands available in many places in the world held potential properties for use in SHCC. The surface structure plays a significant role in the selection of proper sand for use. It affects the dispersing power of the polyvinyl alcohol (PVA) microfibers used in SHCC as well as it reduces the frictional force; both define the mechanism of action of microfibers under applied tension i.e. pullout or rupture. The surface properties can be further synergistically improved by changing the type of mineral admixture, which has a surface compatibility with the selected sand. A new approach using advanced technique showing the efficiency of PVA microfibers dispersion and alignment is introduced. The effect of sand and mineral admixture on PVA microfiber dispersion and strain hardening properties is visibly depicted using the proposed technique. The results have revealed the importance of this approach in preparation of cost-effective and microdurable SHCC.

Online publication : 2016
Publication type : full_text
Public price (Euros) : 0.00