نتایج جستجو برای: heavy concrete
تعداد نتایج: 200594 فیلتر نتایج به سال:
in this paper, the effect of polypropylene fibers added to concrete on strength and thermal resistance of high strength concrete has been investigated. therefore, five tests have been carried out to reach this goal which it includes; effect of weight percent of polypropylene fibers on mechanical properties of concrete, effect of fiber’s length on the strength of high strength concrete, effect o...
Stopping the production, heavy loss and environmental hazards are the outcomes of damaging the offshore pipelines. Several cases of damaging because of fishing activities and clash anchors are reported in the Persian Gulf annually. In this paper, response of pipeline against the traction of hooking the anchor and trawling the gear is studied. In other words, the strength of a pipeline against a...
Submarine pipelines failures lead to oil spills in water and may even lead to explosions with heavy financial and environmental damages. Trawl gear is one of the main factors in the failure of the submarine pipelines. In this paper, sensitivity analysis is performed on influence of height and span length alternations on the response of pipeline against the traction caused by trawling pull-over ...
Background: In megavoltage radiotherapy rooms, ordinary concrete is usually used due to its low construction costs, although higher density concrete are sometimes used, as well. The use of high-density concrete decreases the required thickness of the concrete barrier hence, its disadvantage is its high cost. In a nuclear reactor, neutron radiation is the most difficult to shield. A method for p...
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