Title: Properties of Self-Consolidating Concrete with Rice Husk Ash and Calcium Carbonate Powder

Author(s): Natt Makul and Gritsada Sua-Iam

Publication: Materials Journal

Volume: 115

Issue: 5

Appears on pages(s): 675-684

Keywords: finely ground calcium carbonate powder (CaCO3, CC); residual unprocessed rice husk ash (RuRHA); self-consolidating concrete (SCC); strength; workability

DOI: 10.14359/51702344

Date: 9/1/2018

Abstract:
Self-consolidating concrete (SCC) incorporating alternative materials has been remarkably popular to enhance high-performance workability. This research aimed to investigate the impact of using finely ground calcium carbonate powder (CaCO3, CC) on the workability and strength development of SCC containing residual unprocessed rice husk ash (RuRHA). Three different particle sizes of CC were replaced in portland cement (PC) at 20 and 40 wt%, while RuRHA replaced fine aggregate at 20 wt%. The results indicate that the CC content is higher than the water-powder materials (PC + CC) ratio of control SCC. The fresh unit weight of SCC with and without RuRHA decreased relative to that of the nominal 100% control SCC. The workability of SCC prepared using CC and RuRHA fell within an acceptable range as specified by EFNARC for most of the mixtures. SCC mixed with CC and RuRHA had a lower compressive strength and acid attack resistance than the control SCC.