Abstract Attempts to modify cement-based mixtures and improve their properties have always attracted the attention of researchers. Favorable effects nanoparticles, such as small particle size, high reactivity, great surface area, made them be used one best replacements cement. This paper aims review previous researches conducted regarding nanoparticles on concretes. Influence various types work...

Abrasion of dental crown and the shape of denture occlusal surface are significant indicators in age determination of domestic mammals. The factors that significantly influence age determination of Eneolithic deer game in conditions of an open wildlife habitat are climatic changes that influenced their survival, as well as specific features of teeth morphological structure. In this paper the ag...

This paper presents the results of authors' laboratory testing physical, mechanical and durability properties Ultra-high Performance Concrete (UHPC). The short history development application UHPC concrete is presented in first part this while second deals with experimental investigation, presenting material characterization obtained from physical-mechanical tests. Based on shown paper, mean va...

Over 50 years, a large number of research and development projects with respect to the use of cementitious and concrete materials for manufacturing railway sleepers have been significantly progressed in Australia, Europe, and Japan (Wang, 1996; Murray and Cai, 1998; Wakui and Okuda, 1999; Esveld, 2001; Freudenstein and Haban, 2006; Remennikov and Kaewunruen, 2008). Traditional sleeper materials...

Growing urbanization around the world is leading to increased consumption of concrete, which poses serious environmental problems. The cement industry has very issues and causes various sustainability issues; Carbon dioxide a greenhouse gas that many negative effects on environment. An effective way overcome this impact environment use another material instead in concrete. In study, aim rice hu...

Second-order optical model solutions to the elastic scattering amplitude were used to evaluate total, absorption, and abrasion cross sections for neutron-nucleus scattering. Improved agreement with experimental data for total and absorption cross sections is found when compared with rst-order (coherent approximation) solutions, especially below several hundred MeV. At higher energies, the rstan...

Eroded enamel is more susceptible to abrasive wear than sound enamel. New toothpastes utilizing diamond particles as abrasives have been developed. The present study investigated the abrasive wear of eroded enamel by three commercially available toothpastes (one containing diamond particles) and compared it to the respective wear of sound enamel caused by these toothpastes. Seventy-two bovine e...

In recent years, the Lamb wave analysis by the multi-channel analysis of surface waves (MASW) for concrete structures has been an effective nondestructive evaluation, such as the condition assessment and dimension identification by the elastic wave velocities and their reflections from boundaries. This study proposes an effective Lamb wave analysis by the practical application of MASW to concre...

We analyze the concrete security provided by a signature scheme described in a recent Internet Draft by McGrew and Curcio.