SEM Study of Magnesium Oxychloride cement

R N Yadav; Upendra Singh; Akhilesh Kumar; Priyanka Gupta; Girdhari lal meena

Volume : VI, Issue : IX, September - 2016

SEM Study of Magnesium Oxychloride cement

R N Yadav, Upendra Singh, Akhilesh Kumar, Priyanka Gupta, Girdhari Lal Meena

Abstract :

Magnesium oxychloride cement (MOC) was invented by S.T. Sorel in 1867. It has many properties superior to those of Portland cement. Two main bonding crystalline phases; phase F3 (3Mg(OH)2.MgCl2.8H2O) and F5 (5Mg(OH)2.MgCl2.8H2O) are detected in X–ray diffraction patterns of magnesia cement. Dolomite power was used as inert filler in present study. Dry–mixes were prepared by mixing magnesia and dolomite (inert filler) in the ratio of 1:1 by their weights respectively. Dry–composition was gauged with 20oBe 24oBe, 28oBe, 32oBe and 35oBe gauging solution MgCl2 at 30o C temperature. The SEM images were taken by applying EHT 20,000 KV voltage. The crystallographic, topography and microstructure of experimental blocks of MOC was examined using SEM investigation. The needle shaped MOC crystals were identified in MOC F5 phase.