In order to study the effect of microcapsules on rheological properties asphalt mortar, were prepared by interfacial polymerization and mixed with 70# matrix SBS modified in different proportions prepare two kinds microcapsule mortars. The mortar measured dynamic shear experiment curved beam experiment. test results show that method have a smooth surface, high coating rate, an average particle ...

The mechanism of corrosion of reinforcing steel in concrete is discussed based on electrochemical and electron microscopy observations. The importance of calcium hydroxide precipitation on the steel surf ace in the steel/mortar interface is evaluated by placing filter paper around reinforcing steel bar specimens prior to casting in mortar, thus preventing direct contact between steel and mortar...

Bond strength is the adhesion between an overlay and a substrate mortar; it key parameter ensuring durability having monolithic system. A proper bond essential to resist any stresses associated with volume changes, freeze-thaw cycles, vibrations at interface. Polymer-modified cement mortar (PCM) one of most well-known adhesive materials, used widely as binding agent in engineering construction....

Particle sizes of manganese oxide (β-MnO2) powders were modified by using a mortar and pestle ground method for period of times that varied between 15-60 min. Particle size versus ground time clearly shows the existence of a size-induced regime transition (i.e., regime I and II). Thermoelectric properties of β-MnO2 powders as a function of electrical resistance in the range of R P  = 10 - 80Ω w...