The effect of admixing of aluminium phosphate on oxychloride cement in the matrix has been investigated. It is shown that aluminium phosphate retards the setting process of the cement and improves water-tightness.
Addition of bitumen emulsion to the matrix has been found to improve strength and soundness of the product while decreasing the initial setting periods. Thus, bitumen emulsion as an admixture in magnesia cement is a moisture proofing and strengthening material.
A parametric study was conducted to investigate the effect of gauging solution density on the cementing properties of magnesia cement. It was found that setting time, compressive strength, moisture resisting efficiency, durability and bonding characteristics are improved by increasing the density of gauging solution up to 328Be (Baumé scale).Scanning electron microscopy analysis of magnesia cement indicated the formation of needle-shaped crystals and a compact cement structure, confirming the experimental results.
Investigations pertaining to the effect of admixing
different amounts of fly ash on setting characteristics and
compressive strength of magnesium oxychloride cement has been
carried out in this paper. For this purpose, two different dry mix
compositions (1:0 and 1:1) of magnesia and dolomite were
prepared and 5 %, 10 %, 15 % and 20 % fly ash were added in
dry mixes. The dry mixes were then gauged with 24 °Be
concentration of magnesium chloride gauging solution. It was
observed that initial and final setting times of cement blocks tend
to increase with increasing amount of fly ash in dry mix. MOC
cement blocks of 1:1 composition admixed with fly ash displayed
good cementing characteristics.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.