The effects of pumice aggregate/cement ratios on the low-strength concrete properties

Guenduez L.

CONSTRUCTION AND BUILDING MATERIALS, vol.22, no.5, pp.721-728, 2008 (SCI-Expanded) identifier identifier


Lightweight concretes can be produced by using processed natural material, processed by-product or unprocessed porous materials, depending upon the requirements of density and strength levels. The present study covers the use of pumice lightweight aggregate (PLA) to produce the lightweight concrete (LWC) for use in construction of load-bearing or non-load bearing elements. In this study, pumice aggregate lightweight concrete (PALWC) blocks were produced with different sizes of 8-16 mm as coarse pumice aggregate (CPA), of 48 mm as medium pumice aggregate (MPA) and 0-4 mm as fine pumice aggregate (FPA). According to the preliminary trial batch results, the optimum grade of aggregates was determined as 25% FPA, 25% MPA and 50% CPA by weight for the mixture compositions. The pumice aggregates were obtained from a pumice quarry in Isparta region, Turkey. To analyse the effects of CPA, MPA and FPA/cement ratios on the non-structural concrete engineering properties, the range of different pumice aggregate/cement (A/C) ratios of 6:1, 8: 1, 10: 1, 15:1, 20:1, 25:1 and 30:1 by weight and cement contents of 180, 137, 110, 72, 52, 40 and 32 kg/m(3) were used to make PALWC mixture testing samples with a slump of from 2 to 4 cm.