An experiment was conducted for two months in a recirculatory system consisting 12 glass aquaria (size 41× 41 × 46 cm) to evaluate the effects of substrates on the growth and survival of Macribrachium rosenbergii postlarvae (PL). Treatment T1 having no substrate was considered as the control. Treatment T2 contained pieces of hollow PVC pipe, treatment T3 and T4 were provided with high density p...

The formed-in-place pipe (FIPP) is a trenchless technology used for pipeline rehabilitation. It folded PVC that expands through thermoforming to fit tightly inside the host pipe. However, deficiencies during construction of FIPP liners such as insufficient inflation, misalignment and initial deformation will lead elliptical liner, which affects load-bearing performance liner makes it susceptibl...

ABSTRACT The purpose of this work is to investigate the friction factor for slurries of particles with density close to that of water. The use of particles with density close to that of ice aims to get explanations of new generation of liquid-solid coolant in adiabatic conditions. The solid particles are 3mmdiameter polypropylene sphere, of density 869 kg/m. The test section consists of horizon...

Recent advances in materials engineering are remarkable. New emerging the global market, and old ones constantly being improved. No exceptions for production of pipes. Nowadays cast iron, steel, reinforced concrete, ceramic, plastic other pipes used water supply sewage networks installation. Construction customers designers have to choose which use that they meet set requirements, easy maintain...

The development of recycled aggregate concrete (RAC) provides a new approach to limiting the waste natural resources. In present study, mechanical properties and deformability RACs were improved by adding basalt fibers (BFs) using external restraints, such as fiber-reinforced polymer (FRP) jacket or PVC pipe. Samples tested under axial compression. results showed that RAC (50% replacement aggre...

Postharvest insect pests threaten the nutritional and financial security of smallholder farmers in the developing world. Hermetic storage, a technology that protects grain against insects by blocking their supply of oxygen, alleviates the problem of insect-caused losses. PICS (Purdue Improved Crop Storage) bags represent one hermetic technology that improves food availability and incomes of far...

The piping system design due to pressure will experience vibrations the excitation force that comes from pump. Excitation occurs changes in fluid flow velocity. In addition, length of pipe and large number bends cross with other installations, cause pipe. vibration analysis should not be underestimated, where it is necessary identify causes placement good support effect obstacles prevent failur...