To investigate the mechanical properties of polyvinyl-alcohol (PVA)-fiber-reinforced rubber concrete, 13 groups PVA rubber/concrete specimens with volume fractions 0%, 0.5 vol%, 1.0 and 1.5 vol% particles replacement sand ratios 10%, 20%, 30% were prepared, uniaxial compression full curve test was performed. The findings indicate that bridging effect PVA, as well synergistic particles, can impr...

The article presents the results of research on influence lead production slag environment and ecology city. Due to open storage slags, an excess maximum permissible levels (MPL) was established: near plant, concentration in soil exceeds 3000 mg/kg, while MPL is 3.2 mg/kg. data analyzes obtained by methods scanning electron microscopy X-ray microanalysis, performed a microscope (SEM), as well f...

The structural performance of base-isolated buildings during past earthquakes confirmed the suitability Lead Rubber Bearing (LRB) isolators. To assess effectiveness such isolators, 3D base-fixed and associated models a multi-story building are performed for three components recorded at each stations with closest distances to seismic fault approximately 5.54, 11.39, 17.82 km 6.7 Mw Northridge ea...

Axle bearings of railway car bogies are important parts that support the running cars. It is desirable to detect damage axle at an early state. Therefore, autonomous detection system (ADDS) was developed does not require a power supply nor wiring and notifies bearing vehicle. The ADDS utilized anti-vibration rubber with built-in piezoelectric element wireless transmitter; which installed on box...

Conventional bearing systems and materials, which are important components of machine elements, have often failed to fulfil requirements, especially in places where sealing is required. In such cases, sliding bearings with PTFE- NBR-based polymer elastomer materials operating water or oil preferred. this study, the performance two alternative rubber-based synthetic styrene butadiene rubber (SBR...

Earthquakes are one of the natural hazards that occur due to sudden violent movement of earth’s surface which releases energy and has destructive power in many parts of the world. The development of recent technologies for the control of seismic hazards catches the attention of structural engineers to make the structures seismically resistant. The seismic base isolation technique is a passive p...