Studies have demonstrated the synergism and complexity of ultrasonic (US) treatment biochar (BC) in H2O with dissolved CO2. The objective this study is to elucidate governing mechanistic steps three-phase system by a critical review possible reactions an experimental variables kinetics, which include effects US energy, amplitude CO2 concentration on biochar's properties. Focus placed impacts th...

Cracks sealing in deteriorated concrete often requires the use of repair mortars compatible composition, good adhesion to substrate and free shrinkage. Even where properly bond substrate, that interface affords a preferred pathway for water ingress. Hydrophobic micromortars designed seal cracks via injection might be one way solve problem. This article analyses effect adding three hydrophobic p...

The soaking kinetics, physical, functional and Pasting characteristics of Pearl millet treated under different (NaOH-0.1%, NaHCO3-0.5%, MgCl2-0.5%, Control-Distilled water) chemical stresses during soaking were studied. Peleg’s constants (K1 & K2) were used to study the effect of soaking under different chemicals on kinetics of soaking. The variation in values of Peleg’s constant shows that K1 ...

The effect of gel formation on the mass transfer of water during evaporation or condensation from MgSO4 droplets is studied using aerosol optical tweezers coupled with Raman spectroscopy. In particular, the kinetics of water transport during hydration and dehydration are followed for variable step changes in relative humidity and compared with previous measurements using different methodologies...

To modulate the rate of hydration calcium sulfate hemihydrate (HH) to dihydrate for industrial applications, additives (both accelerants and retardants) are added HH. Here we explore in detail kinetics mechanism HH presence accelerators K 2 SO 4 or ZnSO , also when a retardant (citric acid tartaric acid) is added. Retardants tend lower maximum temperature reaction increase time needed reach 50%...

First principles calculations are employed to provide a fundamental understanding of the relationship between the reactivity of synthetic calcium silicate phases and their electronic structure. Our aim is to shed light on the wide range of hydration kinetics observed in different phases of calcium silicate. For example, while the dicalcium silicate (Ca2SiO4) phase slowly reacts with water, the ...

Infrastructure Technology Institute Year 2 Final Report DISCLAIMER The contents of this report reflect the views of the authors, who are responsible for the facts and the accuracy of the information presented herein. This document is disseminated under the sponsorship of the Department of Transportation University Transportation Centers Program, in the interest of information exchange. A study ...

The hydration of model membranes based on ceramide 6 with a mixture of free fatty acids the most commonly encountered the native lipid matrix of Stratum corneum, the outermost layer of the mammalian skin has been studied by neutron diffraction. Membrane hydration with water vapour at a temperature of 25 degrees C is characterized by a small increase in the repeat distance delta d0 = 1.0 A, whic...