EK543
When the pull on the bar is small, high stresses develop near the loaded end of the bar; some slip of the bar occurs as adhesion between the bar and […]
EK542
Growth of splitting cracks is restrained more effectively when transversereinforcement is placed close to the surface of the bar.
EK531
When a ring in the concrete surrounding the bar is stressed to rupture, it breaks and longitudinal (splitting) cracks appear on the concrete surface.
EK321
Too much water in the mix creates water reservoirs. Channels lead from the reservoirs to the surface, where a watery laitance forms. A weak surface results, leading to concrete crazing, […]
EK33
When a block is on a flat plate, there is a minimum force, which necessary to move the bock. Both the bottom surface of the block and the top surface […]
EK32
When a body is in a liquid the surface of the body is subject to the same pressure everywhere, irrespective of the material. The pressure acts perpendicular to the surface, […]