Hydrated lime is a historic material currently used in conservation. It hardens slowly by carbonation slowing construction however, supplementary cementitious materials accelerate hardening enhancing strength. Hydrated-lime mortars with rice husk ash–RHA-; ground granulated blastfurnace slag–GGBSand increasing amounts of two aggregates were studied. Increasing aggregate lowered strength as inte...

Abstract Pretreated silica sand labeling using varying concentrations of tin(II) fluoride and chloride as reducing agents different times was performed in order to develop a methodology for with 99m Tc solid radiotracer. Influence pretreatment parameters on the sorption yield (R ret% ) statistically evaluated. The effectiveness methods used reduce pertechnetate ( TcO 4 − by ascending paper chro...

Devonian black shales that were deposited on the North American craton contain abundant Tasmanites cysts. Although these are typically flattened because of compaction, a small proportion of cysts is filled with diagenetic silica. The latter are spherical to ellipsoidal (0.1-0.5mm), and filled with chalcedony, microand megaquartz, and with single quartz crystals. Chalcedonic cyst fillings are pr...

The present study revealed a low-cost process for utilizing desert sand preparing nanosilica by sol-gel technique. This work required sodium hydroxide, concentrated hydrochloric acid, distillate water as raw materials, and Iraqi sand. Nanosilica sample was characterized X-Ray Diffraction (XRD), scanning electron microscopy analysis (SEM), atomic force microscope(AFM), surface area (BET) method,...

This paper presents the horizontal bearing characteristics of piles in coral sand and silica from comparative experimental studies. Six model with different diameters were tested. The capacity, deformation characteristic, bending moment, p–y curve, change soil pressure, as well particle breakage behaviour investigated. results show that, foundation, capacities increments pressures are obviously...

This study presents a filter system for the removal of pathogenic microorganisms from potable water using silver nanoparticle-modified silica sand. While sand has potential applications in wastewater treatment, its effectiveness microbial filtration falls short. Thus, there is need an environmentally friendly enhancement method. The nanoparticles were synthesized Commelina maculata leaf extract...