Effect of Silica Fume and Nano Silica on Mechanical Properties of Fiber-Reinforced Lightweight Concrete

مهندسی عمران فردوسی

Article 9, Volume 31, Issue 2 - Serial Number 22, May 2018, Pages 129-139   

Document Type: Research Note

DOI: 10.22067/civil.v31i2.53442

Authors

Seyed Hosein ‎ Ghasemzadeh Mousavinejad ‎^{* 1}; yasser ghorbani²

¹University of Guilan ‎‏ ‏‎ ‎

²The nonprofit Institute of Deylaman Lahijan

Abstract

Lightweight concrete has significant importance due to its special features including weight reduction of structures.This article aims to study ‎the effect of silica fume (SF) and ‎nano silica (Na) on mechanical properties of fiber reinforced concrete containing lightweight scoria aggregates. SF ‎and Na are replaced by different amounts of cement weight. The used amounts of Steel and ‎polypropylene fibers having different length to ‎diameter ratios are different.‎ For this study, seventeen different lightweight mixtures ‎were made and tested for mechanical strengths, water absorption and density. ‎Results show that optimized replacement ‎amount of SF and Na is 10% and 3%, respectively. Steel fiber in comparison to ‎Polypropylene fiber had‎ better effect on mechanical characteristics of lightweight concrete.‎

Keywords

Lightweight Scoria; Silica fume; Nano Silica; Steel and Polypropylene Fibers; Mechanical properties

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