Author: Adnan DÖYEN, Emre AKSOY
Publishing Date: 2013
Volume: 28 Issue: 1
In this study, it is aimed to study the geological, physical and mechanical properties of the Gelincik (Isparta) pumice deposits, and to determine their suitability for concrete construction. For this purpose, the mineralogical and chemical compositions of the samples were determined. To determine their physical characteristics, the samples were subjected to some analyses, namely; sieve and loss of ignition, and some tests, namely, specific gravity, water-absorption, moisture, insoluble residue as well as puzolonic activity. At the end of the 28th day of the test, done by using only pumice, lime and water, without cement, the concrete sample iş determined to have a strength value close to C20 concrete class (19,8 N/mm2). To determine their mechanical properties, 5 different pieces of concrete, all of which can be classified as class of lightweight concrete, were prepared using different proportions of pumice aggregate and stream sediments.
A concrete sample (T5) was prepared by using 450 kg. cement, 187 kg. water, 479.2 kg. river sand, 179 kg. fine acidic pumice, 299.5 kg. medium acidic pumice and 239.6 kg coarse pumice. The T5 sample has got 1841.05 kg/m2 density, and uniaxial pressure value (28-day) of 28.3 N/mm2, which is the best results obtained amongst the samples.
Key Words: Pumice; geology; lightweight concrete, physical properties; mechanical properties; Isparta; Gelinci