Abstract
This study aims to investigate the effect of different gradations of coarse aggregates on mechanical properties of no-fines concrete (NFC). NFC reduces a structure’s self-weight, thus minimizing cost. The effects of coarse aggregate gradation on mechanical properties such as compressive strength, split tensile strength, and flexural strength were studied and compared at the end of 28-day water curing. A fixed cement- to-aggregate proportion 1:6 with 0.5 water/cement (w/c) ratio was adopted. Four gradations of coarse aggregates ranging between specific maximum and minimum size were used, namely 5mm-4mm, 10mm-4mm, 20mm-4mm and 20mm-15mm. The results of this study reveal the substantial effect of the gradation of coarse aggregates on strength properties compressive and tensile strength of NFC.
Highlights
Concrete without fines is a type of lightweight porous concrete acquired by removing the sand from the ordinary concrete mix
nofines concrete (NFC) is a type of lightweight concrete produced from only cement water and coarse aggregates
The coarse aggregates are covered with cement paste and linked point-topoint with thin cement paste holding aggregates in a matrix, augmenting concrete strength
Summary
Concrete without fines is a type of lightweight porous concrete acquired by removing the sand from the ordinary concrete mix. NFC is a type of lightweight concrete produced from only cement water and coarse aggregates. No concrete fines normally used are single sized coarse aggregates. This resulted to the concept of carrying out an experimental study to explore the impact of various gradations of coarse aggregates used in concrete nofines in the first Part [14]. In this Part, the impact of coarse aggregates’ size have been researched regarding mechanical characteristics. The results of NFC were compared with that of conventional concrete
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