Transport Properties of Limestone-Containing Self- Consolidating Concrete

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Title: Transport Properties of Limestone-Containing Self- Consolidating Concrete

Author(s): Nader Ghafoori, Rebecca Spitek, and Meysam Najimi

Publication: Materials Journal

Volume: 114

Issue: 04

Appears on pages(s): 527-536

Keywords: compressive strength; limestone powder; self-consolidating concrete (SCC); transport properties

Date: 7/1/2017

Abstract:
This study examined the effects of limestone powder as a partial replacement for cementitious materials on transport properties of self-consolidating concrete (SCC). Several SCCs were prepared with a uniform powder content (cement + fly ash + limestone) and water-cementitious materials ratio (w/cm) of 475 kg/m3 (800 lb/yd3) and 0.45, respectively. Class F fly ash substituted 20% by weight of cement and up to 30% of total cementitious materials was replaced with limestone powder. A slump flow of 635 ± 25 mm (25 ± 1 in.), visual stability index of 1, and passing ability of 25 ± 12.5 mm (1 ± 0.5 in.) were used for all studied mixtures. The devised experimental program contained compressive strength, absorption, sorptivity, rapid chloride penetration (RCPT), rapid chloride migration (RCMT), water penetration depth, and chloride diffusion. Inclusion of limestone powder improved absorption, volume of permeable voids, capillary absorption, water penetration depth, and RCPT. Compressive strength and RCMT improved marginally, whereas a slight negative effect was observed for chloride diffusion.