Effect of basaltic pumice aggregate addition on the material properties of fly ash based lightweight geopolymer concrete

TOP S., VAPUR H.

JOURNAL OF MOLECULAR STRUCTURE, vol.1163, pp.10-17, 2018 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 1163
  • Publication Date: 2018
  • Doi Number: 10.1016/j.molstruc.2018.02.114
  • Journal Name: JOURNAL OF MOLECULAR STRUCTURE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.10-17
  • Keywords: Geopolymer, Basaltic pumice, Fly ash, Lightweight concrete, Statistical analysis, MAGNESIUM NICKEL SLAG, RED MUD, COMPRESSIVE STRENGTH, FURNACE SLAG, SILICA FUME, CEMENT, CLAY, MICROSTRUCTURE, DURABILITY, COMPOSITES
  • Abdullah Gül University Affiliated: No

Abstract

In this study, fly ash (FA) based geopolymer (GP) concretes were produced by using a mixture of basaltic pumice (BP) aggregates and a fly ash (Class F) for lightweight concrete production. ANOVA Yates' test technique was applied to find out the effective curing parameters. BP aggregates were ground four different fractions of particle sizes as -12 + 4 mm, -4+0.425 mm, -0.425 + 0 mm and the one containing the size distribution of Turkish Standard 802. Also, effects of the curing time in the oven were investigated. The uniaxial compressive strength (UCS) (20-55 MPa), the point load strength (4-14 kN), the water absorption (1.05%-17%), the Mohs hardness (5.5-3) and the sonic speed values (4.12-2.72 km/sn) were measured. Stress-strain curves were graphed. The density of the concrete ranged from 1700 kg/m(3) to 1792 kg/m(3) which confirm the lightweight concretes. (C) 2018 Elsevier B.V. All rights reserved.