In the presented paper, an attempt has been made to first find permeability of Euphorbia tortilis cactus (ETC) concrete by water method and infiltration method. After that, flexural strength ETC RC beam wrapped with AFRP kelvar 149 is carried out a 2-point load test. This research aimed develop more durable, flexural, sustainable under static load. Based on state-of-the-art information availabl...

 Externally Bonded Reinforcement on Grooves (EBROG) is a new method that has been introduced to postpone or eliminate debonding of FRP sheets from concrete surface in concrete beams strengthened for flexure and increase loading capacity. For strengthening reinforced conceret beams in strructure, use of different types of FRP like: laminate, AFRP, CFRP, and GFRP. By there is some differences bet...

Abstract The corrosion of steel rebars is the main cause reinforced concrete degradation, which results in increasing costs with structural rehabilitation and repairs. As a solution, resistant rebars, such as those FRP – Fiber-reinforced polymer –, have been used to replace conventional steel. This paper describes development design program that calculates flexural reinforcement T-shape beams. ...

Polymer matrix composites are the most prevalent ones among all composite materials because they offer high specific strength to weight ratio, toughness, and ease of processing. These own their properties high-strength reinforcement as carbon, glass, aramid fibers. The mass production method such is basically sheet molding compound (SMC) compression technology. However, regarding inherent defec...

The combined effect of the use of carbon fiber and seawater and the molecular structure on the tribological behavior of various polymer materials under natural seawater lubrication was investigated. After the investigation, the wear morphology of the contact surface was observed by a laser scanning confocal microscope, and the texture of the wear scars and tracks were presented in 3D profiles. ...

Abstract This paper presents the ability of Terahertz (THz) radiation in non-destructive testing composite materials used for military applications ballistic protections. The terahertz scanner was to detect defects selected elements consisting aramid fiber-reinforced composites. Two sources radiation, operated at frequencies 100 GHz and 300 GHz, were chosen. results next compared with one obtai...

This study compared pulmonary effects of para-aramid respirable-sized, fiber-shaped particles (RFP) (p-aramid fibrils) and chrysotile asbestos fiber exposures in rats. Additional p-aramid inhalation studies were conducted in hamsters to compare species responses. The hamster results are preliminary. The parameters studied were clearance/biopersistence of inhaled p-aramid RFP or size-separated a...

STATEMENT OF PROBLEM Despite the favorable properties of conventional PMMA used as a denture base material, its fracture resistance could be improved. PURPOSE This in vitro study was performed to determine whether the flexural strength of a commercially available, heat-polymerized acrylic denture base material could be improved through reinforcement with 3 types of fibers. MATERIAL AND METH...

In this paper the effect of various chemical treatments on the damping property of jute fiber reinforced green composite is discussed. The surface of the jute fiber was modified by alkali, permanganate, benzoyl chloride, malic anhydride and silane treatments. Several samples of unidirectional composites were prepared with treated jute fibers as well as untreated jute fibers. Matrix used is epox...