Effect of slag, nano clay and metakaolin on mechanical performance of basalt fibre cementitious composites

Abstract

In this study, the effects of pozzolanic admixtures (ground granulated blast furnace slag, nano-clay, meta kaolin) are investigated in chopped basalt fibre cementitious composites (BRC). First, the variations in compressive strengths and flexural characteristics during 3, 7, 28, 56, 90 and 120-day curing periods are addressed. Afterwards, most importantly, the degradation in the flexural performance during aging tests (freeze-thaw test, heat-rain test) are focused. The main aim is considerably to save the pull-out behaviour of BRC, even when exposed to harsh atmospheric conditions. All the test results are compared with control specimens (100% cement). The results arising from the experiments including metakaolin are promising to enhance the durability performance of BRC. The implications in this experimental study are valid for basalt fibre reinforced concrete (BFRC) subjected to those atmospheric conditions as well. (C) 2018 Elsevier Ltd. All rights reserved.