The present study focuses on exploring the effects of reactivity and degree dispersion BaCO 3 additions in manufacture sulfate-resistant OPC cements. A new electrochemical deposition method is attempted to effectively disperse particles (studying two different materials with particle size: D 50 = 11.45 2.37 μm) cement enhance their favour sulfate immobilisation form BaSO 4 . barium carbonate ad...

In recent years, oil spills and leakages have often occurred during exploration, transportation, handling, usage, processing, causing serious global environmental problems. Microbially-induced carbonate precipitation (MICP) is an emerging green, environmentally friendly, sustainable technology that has proven to be a promising alternative for soil stabilisation. This paper provides comparison b...

The transformation of CO2 into a precipitated mineral carbonate through an ex situ mineral carbonation route is considered a promising option for carbon capture and storage (CCS) since (i) the captured CO2 can be stored permanently and (ii) industrial wastes (i.e., coal fly ash, steel and stainless-steel slags, and cement and lime kiln dusts) can be recycled and converted into value-added carbo...

The oceans are an enormous store of carbon, substantially greater than on land or in the atmosphere and hence play a key role in the global carbon cycle, especially in helping regulate the amount of CO2 in the atmosphere. The oceans are important because they have taken up around 27-34% of the CO2 produced by humankind through the burning of fossil fuels, cement manufacturing and land use chang...

Portland cement used in the construction industry improves its properties when wet. Since most dental materials are used in a moist environment, Portland cement has been developed for use in dentistry. The first generation material is mineral trioxide aggregate (MTA), used in surgical procedures, thus in contact with blood. The aim of this study was to compare the setting of MTA in vitro and in...

The aim of this study was to evaluate the interference of the radiopacifiers bismuth oxide (BO), bismuth carbonate (BC), bismuth subnitrate (BS), and zirconiun oxide (ZO) on the solubility, alkalinity and antimicrobial properties of white Portland cement (WPC). The substances were incorporated to PC, at a ratio of 1:4 (v/v) and subjected to a solubility test. To evaluate the pH, the cements wer...

Cement is a material which maintains durability of building structure and conservation of cultural heritage. Although hundreds and thousands of successful concrete and buildings are annually constructed worldwide, there are large number of concrete structures (including historical monuments), that deteriorates or become unsafe in loading. Hence ,in order to overcome the short comings of convent...

Transects of the submersible Alvin across rock outcrops in the Oregon subduction zone have furnished information on the structural and stratigraphic framework of this accretionary complex. Communities of clams and tube worms, and authigenic carbonate mineral precipitates, are associated with venting sites of cool fluids located on a fault-bend anticline at a water depth of 2036 meters. The dist...

Hemicarbonate is observed in hydrated cement paste even after prolonged hydration and the presence of calcium carbonate, although monocarbonate expected to be thermodynamically more stable. In this study, we demonstrate that hemicarbonate significantly stabilized by incorporation foreign anions its structure, resulting formation solid solutions. We analyse hemicarbonate-Friedel's salt hemicarbo...