Electro-deposition repairing concrete crack technique is of vital importance to prolong the service life structure in marine environment. In this paper, effect using seawater as an electrolyte was compared with ZnSO4 solutions, and mechanism electro-deposition cracks under environments investigated. Besides, various parameters such electrode materials, distances current density were studied sea...

We describe a novel combustion synthesis for the preparation of Nanomagnesia (NM) and its application in water purification. The synthesis is based on the self-propagated combustion of the magnesium nitrate trapped in cellulose fibers. Various characterization studies confirmed that NM formed is crystalline with high phase purity, and the particle size varied in the range of 3-7nm. The fluoride...

Metamorphic hydration and oxidation of ultramafic rocks produces serpentinites, composed of serpentine group minerals and varying amounts of brucite, magnetite, and/or FeNi alloys. These minerals buffer metamorphic fluids to extremely reducing conditions that are capable of producing hydrogen gas. Awaruite, FeNi3, forms early in this process when the serpentinite minerals are Fe-rich. Olivine w...

A structural study has been performed on the MgO(111)-(1 · 1) surface by low energy electron diffraction (LEED) using experimental data obtained with a delay-line-detector LEED (DLD-LEED) system to minimize electron damage. It was found that the surface is terminated by a hydroxide layer with the topO–Mg interlayer spacing equal to 1.02 Å, which is close to the spacings betweenMg andO planes in...

Weak and weathered rocks are well known for their sensitivity to changes in moisture content. Degrading behavior is common weak with moisture-sensitive mineral components present numerous stability problems. The slake durability a measure of the resistance weakening disintegration rock materials which quantitatively distinguishes durable from non-durable materials. Several material parameters i...

-Maps of the electrostatic potentials at the basal plane of talc and pyrophyllite, computed using a two-dimensional Ewald lattice-sum, reveal the effects caused by structural distortion of the phyllosilicate layer. Rotation and tilting of basal tetrahedra in phyllosilicates dramatically perturb the electrostatic potential near the (001) surface. A potential high exists at the center of each six...

-The chemical compositions ofchlorite-smectite mixed-layered minerals (C/S) from the Ohyu caldera (lnoue, 1985) are analyzed using M+-4Si-3R 2§ diagrams. The assumed original saponite has the following composition: Si3.54Alo.460 ~ 0Alo. ~7~Fe 2§ ~.385Mg1.z95Mn0.o2(OH)2M+o.56. Random C/S minerals ( 100 to 80% expandable layers) are interpreted as an interstratification of the starting 2:1 smecti...

Compositional variations of talc in peridotites and serpentinites could have significant implications for modeling geochemical cycles involving the upper mantle but been scarcely studied. We analyzed chemical compositions prograde retrograde associated minerals thermally metamorphosed from Southwest Japan. The has Si, Al, Mg, Fe, Na contents. Most Fe indicate mechanical mixing with serpentine c...

One of the major durability concerns for limestone calcined clay cement (LC3) concrete is its high susceptibility to atmospheric carbonation that could lead an early onset electrochemical corrosion reinforcing steel in structures. Aimed at designing innovative LC3 formulations with potentially enhanced resistance, this preliminary study investigates influence reactive magnesia (MgO) on early-ag...