Magnezyum Oksiklorür Çimentosu ile Pomza Katkılı Hafif Yapı Malzemesi Üretilmesi

Abstract

In this thesis, pumice added magnesium oxychloride cement (sorel cement) based light weight building materials were produced and characterized. Two different molar ratios were determined for production of sorel cements. While choosing the molar ratios, attention has been paid on each mixtures having different molar MgO ratios, and formation of phase 5 crystals. The molar ratio of H2O/MgCl2 in the cement mixtures was fixed at 12/1, and two different cements were prepared with MgO/MgCl2 molar ratios of 13/1 and 6.8/1. In this study, pumice added light weight concrete were produced with different sizes of pumice grains, and those are 0 - 4 mm (fine), 4 - 8mm (medium), and 8 - 16 mm (coarse). Sorel cements were prepared with distilled water and tap water and examined. Formation of Phase 5 crystals had been obtained by analyzes of X-Ray Diffraction and Scanning Electron Microscope. In addition, for each ratios, cements with distilled water have less density and more compressive strength values. It was decided to prepare light weigt iv building materials with distilled water. In production of light weigt building materials, first, moulds were filled with pumice then sorel cements were added to the moulds. Density analyzes, compression strength tests, open porosity, water absorption, porosity and thermal conductivity measurements were performed on light weight building materials. According to the results, for both molar ratios, the materails prepared with fine size of pumice grains, was identified to have the highest compressive strength, the lowest porosity, density and thermal conductivity coefficient values. The materails prepared with coarse size of pumice grains, was identified to have median compressive strength, porosity, density and thermal conductivity coefficient values. With medium size of pumice grains, was identified to have the lowest compressive strength, the highest porosity, density and thermal conductivity coefficient values. However, for same pumice grains, when the differences of cement mixtures are examined, the materials with MgO/MgCl2 molar ratio 6.8/1 have lower compressive strength, porosity, density and thermal conductivity coefficient values. On the other hand, they have higher open porosity and water absorption values than the light weight building materials with MgO/MgCl2 molar ratio 13/1.