Crumb rubber is basically tiny particles produced from scrap vehicle tires. This crumbled into uniform with the help of shredders. In present work, an attempt has been made to utilize as a partial substitute fine aggregates in fabricating cement concretes. Concrete mixture cement, coarse aggregates, and water. Rubber size ranging between 0.297 0.250 mm are used proportion 5, 10 15% by weight pa...

To produce thin grooves in the tread portion of tires, tire molds contain a multitude of sipes, which are thin metal inserts that project into the tread rubber during molding and curing. The geometric design and location of sipes is based on tire performance as well as appearance. A completèfamily' of tires, typically consisting of a dozen or more tire sizes with similar tread designs, will req...

Polydimethylsiloxane (PDMS) is a commercially available physically and chemically stable silicone rubber. It has a unique flexibility with a shear elastic modulus G ≈ 250 kPa due to one of the lowest glass transition temperatures of any polymer (Tg ≈ −125 ◦C). Further properties of PDMS are a low change in the shear elastic modulus versus temperature (1.1 kPa ◦C−1), virtually no change in G ver...

In this assessment, hybrid composites were prepared from the combination of industrial waste, as marble waste powder (MWP) with conventional fillers, carbon black (CB) as well as silica as reinforcing material, incorporated with natural rubber (NR). The properties studied were curing, mechanical and swelling behavior. Assimilation of CB as well as silica into MWP containing NR compound responde...

Reported cases of allergic contact dermatitis caused by methylenediphenyl diisocyanate (MDI) have increased and thereby increased the need for adequate skin protection. Current standardized permeation and penetration test methods give information about efficacy of protective materials against individual components of the polyurethane systems. They do not give information of what kind of clothin...

During the fall semester of the 2005-2006 academic year, I decided to try to produce some scale models of structural systems out of rubber. I had in mind to use these models to demonstrate structural behavior to undergraduate students, thinking that seeing models deform under load would be far more convincing than the standard line diagrams of deformed shapes that we typically use in engineerin...