17 8月 洛杉矶论文代写-混泥土材料实验
本篇是讲混泥土材料实验，在材料选择中，很少使用爆炸试验。使用混凝土和其他材料尤其如此。然而，保险商实验室提出了一种严格的测试形式。根据UL标准，爆炸测试将包括准备测试样品的材料，混凝土，适当的添加剂或TL 15。一旦样品准备好了,那么测试炉打开,然后加热到华氏2000度样本插入在这一点上,约30分钟或更多样本与炉设置左内继续存在2000度f .然后检查爆炸材料。本篇洛杉矶论文代写文章由美国论文人EducationRen教育网整理，供大家参考阅读。
In material selection, it might be rare to make use of an explosion test. This is particularly the case with using concrete and other materials. However, the underwriter laboratories suggest a rigorous form of testing. According to UL standards, the explosion test will include preparing a test sample of the materials to be used, concrete, propriety mix with additives or the TL 15. Once the sample is prepared, then the test furnace is opened and is then heated to around 2000 degrees F. The sample is inserted at this point and for around 30 minutes or more the sample is left inside with the furnace setting continuing to be around 2000 degrees F. The material is then checked for explosion.
If it is explosion resistant, then the material is still checked for heat or moisture related damages which show that material is slowly deteriorating. Sometimes, it might be necessary to combine the heat, and impact test along with the explosion test, too.
In material selection, it is to be noted that some manufacturers offer fire protection cladding. The fire protection cladding process ensures that the safe walls or sometimes just the safe door is fire retardant or resistance. The entire door might be encased with PSI concrete amalgamate. The PSI concrete mix ensures that the interior contents of the safe are still safe to around 90 minutes in 1700 degree Fahrenheit.
In material selection with respect to the concrete used or the concrete mixes used, aggregates play an important role. Aggregates are a major constituent when it comes to concrete utility constructions and is around 75 percent of more of the precast used. In safe wall building, it might be necessary to use a mix of coarse and fine aggregates and hence the selection of aggregates becomes an important concern here. Some of the aggregate selection criteria are considered as how clean the aggregates are. Some of the aggregates are very clean and hard but might lack in durability and furthermore they also might not have proper gradations. Now since the concrete to be used is usually exposed to some form of corrosive environment, it is critical that the aggregate is able to meet these wear and tear conditions. Aggregate’s expansive properties play a critical role here. When exposed to moisture and porosity, the aggregate must be able to strengthen the overall structure. Some of the aggregates might need to be eliminated based on where they are received from.