Chloride-induced corrosion of reinforced concrete is one of the main deterioration mechanisms leading to shortening of the service life of concrete structures. Therefore, assessment of the resistance of concrete to chloride ingress plays an important role in predicting the service life of such structures. The Rapid Chloride Migration (RCM) test is one of the accelerated test methods commonly us...

For more than 100 years, the primary theme underlying the NBS/NIST staff contribution to the crystallography of building materials has been the development of an improved understanding of concrete materials performance. Over that time period, portland cement concrete has become one of the most important of our construction materials for roads, buildings, and other large municipal structures. At...

introduction: this in vitro study measured and compared ph and phosphate and calcium ions release of a new endodontic material (cem cement), mineral trioxide aggregate (mta), and portland cement (pc) using uv-visible technique, atomic absorption spectrophotometry methods, and ph meter, respectively. materials and methods: each material was placed in a plastic tube (n=10) and immersed in a glass...

The quality of cement is one of the important factors which materially contribute to the strength and durability of structural concrete. Different brands of Portland cement are used in Libya by local contractors for various construction work. However, no comparative study has been made undertaken hitherto to investigate the mechanical and physical properties of the various brands of cement. Thi...

Wisconsin Department of Transport (WisDOT) permits use of Grade A-FA (70% cement plus 30% Class C fly ash) concrete mixtures for pavement construction. This paper discusses a laboratory investigation performed to study the effects of the cementitious materials such as portland cement, ASTM Class C fly ash, ground granulated blast furnace slag (GGBFS), blends of cement and fly ash, and cement pl...

PURPOSE To evaluate the bone healing of mandibular fractures following the use of Portland cement. METHODS Thirty-two male Wistar rats were divided into control and experimental groups. In the control group the rats were submitted to a mandibular fracture, which was reduced, and the soft tissues were sutured. In the experimental group the rats had the mandibular fracture reduced and maintaine...

introduction: osteoblasts and periodontal ligament cells are major cells for wound healing after root end resection. the interaction of osteoblasts with filling materials could play a critical role in healing of surgical lesion. adhesion and spreading of cells on material surface are the initial phase for cellular function. the purpose of the present study was the evaluation of morphology and a...

Solidification of industrial sludge in concrete matrices has been examined. The concrete mixes in which galvanic sewage sludge was immobilised were prepared with the use of two binder types: Portland-fly ash cement CEM II/B-V, and a binder composed of Portland cement (60%) and fly ash obtained from fluidized bed combustion of fuels (40%). Leaching of heavy metals (Cr, Cd, Zn, Ni, Cu, Pb, V) was...

PURPOSE This study investigated the effects of silver nanoparticle (SN) loading into hydraulic calcium silicate-based Portland cement on its mechanical, antibacterial behavior and biocompatibility as a novel dental bone substitute. MATERIALS AND METHODS Chemically reduced colloidal SN were combined with Portland cement (PC) by the concentrations of 0 (control), 1.0, 3.0, and 5.0 wt%. The phys...