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Q. What do you mean by Ozone Test?
Some research and studies determined that the ozone test was unnecessary as this affects only the surface layer. In un-stretched rubber, ozone degradation is confined to a thin surface layer, typically 0.5 µ. Ozone cracks develop at right angles to the tensile strain and they degrade rubber's tensile strength and may also initiate fatigue growth that ultimately leads to failure of rubber products. Because cracks only occur in regions where tensile stresses are induced, they are unable to penetrate very far into objects, which are under compression. In bearings, the growth of cracks ceases close to the surface because cracks quickly encounter compressive rather than tensile stresses. Therefore, it has been contended that ozone damage is a serious concern in thin-walled products, but not in those bulky products like bearings. Contrarily there is a harmful effect because the manufacturers use anti ozanant waxes to protect against ozone attack. This viscous layer of wax is responsible for a significant number of serious slipping problems where the bearings 'walked-out' of the support area.
State the term Axial Prestressingin Concrete If the centroid of cross-sectional areas of tendons is at the location of the centroid of the cross-section of the concrete member,
lame throm question
"We have one other pressing challenge that you could review for us," Alistair Wu says. "As you know, the Shanghai plant was our first facility in China, but we also have two other
The plastic limit and liquid limit of a soil are 33% and 45% respectively. The percentage volume change from the liquid limit to the dry state is 36% of the dry volume. Likewise, t
Q. How to evaluate quality of Bricks? 1. Clour -Deep red, Carry red, Copper red, colour is indication of uniform burning and also suggests quality of clay used. Over brunt bric
Define the meaning of circular prestressing In circular prestressing, tendon wires are wrapped under tension over the concrete pipes which are pre-cast. The tension in the ten
HIGHWAY TRANSPORTATION: Broadly, there are two classes of roads: (a) Urban, and (b) Rural (Non-urban). Urban roads are those which are located within tow
Why we need a high strength concrete in prestressing There is another aspect to why we need a high strength concrete in prestressing. Prestressed concrete is subjected to high
Stability of the upstream slope of an earth dam Give the step by step procedure for examining the stability of the upstream slope of an earth dam by the Swedish method of slice
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