The use of cement substitute, such as alkali-activated slag, is great interest in the field earth-based construction materials to preserve their environmental benefit. Nonetheless, cationic activity clayey particles induces new issues by affecting alkaline conditions which slag activated. This work aims present how modify nature and amount hydrates formed, kinetics for reaction resulting mechan...

The D/H ratios of hydrogen gas in equilibrium with aqueous alkali halide solutions were determined at 25 °C, using a hydrophobic platinum catalyst. The hydrogen isotope effect between the solution and pure water changes linearly with the molality of the solution at low concentrations, but deviates from this linearity at higher concentration for all alkali halide solutions. The magnitude of the ...

There is a growing interest in developing environmentally-friendly substitution for Portland cement soil stabilization. This study evaluated the feasibility of using volcanic ash (VA)-based geopolymer as an alternative stabilizer to by comparing their shear strength behavior and life cycle assessment (LCA). The effects curing conditions, vertical confinements, binder contents, alkali activator ...

The effects of silica fume and sodium silicate-based activators (SFA SSA, respectively) with different Ms (SiO2/Na2O) values on the setting behavior, rheological, mechanical, microstructural properties alkali-activated slag cement (AASC) were investigated. Setting time test results showed that AASCs activated by SFA prolonged significantly an increase value opposite to SSA activation case. From...

PURPOSE A topical synthetic metalloproteinase inhibitor (SIMP) has been reported to reduce the incidence of corneal ulcerations in the alkali-injured eye by the putative mechanism of collagenase inhibition. The current study was performed to determine whether SIMP has a direct inhibitory effect on the activation of neutrophils and to compare any such effect with that of citrate, a known inhibit...

In this study, a laterite soil which is locally available material in many parts of the world was used as aluminosilicate precursor. The main objective study to investigate effect calcination temperature on physicochemical properties resulting geopolymers synthesized from calcined soils. order produce geopolymer binders, activated thermally through (from 550 750 °C) and with an alkali activator...

The impact of calcium hydroxide as an additive in sodium hydroxide- and silicate-activated metakaolin pastes is presented with a primary aim to ascertain the specific effects on reaction kinetics phase formation. FTIR XRD are employed understand interaction (10 wt% replacement metakaolin) 1, 5 10 M NaOH-activated (and equivalent molarity Na2SiO3-activated pastes), focus its nanoscale properties...

Porous ceramics were generated by direct foaming the alkali-activated unprocessed kaolin (impure kaolin, iK) with addition of hydrogen peroxide (H2O2) and calcining at a low temperature 400 ​°C. Hydrogen peroxide, blowing agent, decomposes producing oxygen gas bubbles forming porous structure in fresh iK paste. In present study, three different molarity alkali activator (5, 10, or 15 ​M NaOH) e...

Abstract This paper deals with the influence of length moist curing period on development internal structure a paste based alkali-activated slag. Waterglass was used as activator. For purpose experiment, test specimens subjected to experiment were divided into five sets different regimes combining and air curing. The reference set kept in an environment relative humidity ≥ 95% during entire mat...