Among the several schemes that have been reported to be a satisfactory alternative Portland cement is alkali-activated cement, which has recently started receive greater consideration in construction sectors. Conventional two-part alkali activation many drawbacks, including activating solution viscous, problematic and not user friendly handle. Thus, aim of this research produce one-part metakao...

Ordinary Portland Cement (OPC) is often used for the solidification/stabilization (S/S) of waste containing heavy metals and salts. These waste components will precipitate in the form of insoluble compounds on to unreacted cement clinker grains preventing further hydration. In this study the long term effects of the presence of contaminants in solidified waste is examined by numerically simulat...

Recently, techniques for acquiring, analyzing, and using 3-D shape infonnation for aggregates (sand, gravel) have been developed and demonstrated. These mathematical techniques, based on spherical hannonic coefficient analysis, have been applied to X-ray computed tomography images. X-ray microtomographic images of cement particles are required to be able to apply these same mathematical techniq...

prolonged or repeated exposure to cement dust, depending on the duration, level of exposure and individual sensitivity has health implications on the skin, eyes, respiratory and haematological systems. this study assessed cardiovascular disease risk factors and cardiac markers among cement workers of nigerian origin to determine the effects of duration of exposure to cement dust on these parame...

OBJECTIVE The aim of the present study was to determine the release of arsenic from 2 gray Portland cements, a white Portland cement, and 2 MTAs (ProRoot and MTA-Angelus). STUDY DESIGN The materials were manipulated and placed in plastic tubes, and the tubes were immersed in glass flasks containing water with grade reagent, pH 5.0. After 3 and 168 h, the water in which the material had been i...

This article evaluates the ability of a magnesia kiln dust (PC-8) and commercial calcined MgO (MCB100), combined with ground granulated blastfurnace slag (GGBS), as constituents binary M-S-H binders. Mortars pastes were manufactured their properties compared to those Portland Cement (PC). MgO-based mortars showed an increase in setting time higher fresh consistency. At earlier ages lower mechan...

X-ray powder diffraction provides a direct analysis of phase abundance of portland cement clinkers and cements. The ASTM C01 (Cement) Committee formed a task group to investigate quantitative X-ray powder diffraction analysis that resulted in the ASTM C 1365 standard test for X-ray powder diffraction of portland cement clinker and portland cement. Estimates of test precision and bias are requir...

.............................................................................................................................1 Wastes and By-Products for Use in Portland Cement Concrete.....................................2 RESEARCH OBJECTIVES ....................................................................................................3 LITERATURE SURVEY.....................................

Introduction: Both Mineral Trioxide Aggregate (MTA) and Portland cement (PC) have been highlighted because of their favorable biological properties, with extensive applications in Endodontics, including the possibility of using into root canal filling. Objective: This article reviews literature related to MTA and PC comparing their physical, chemical and biological properties, as well as their ...