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(一)问题的提出及其意义:单位重“丫。”是指石料(包括孔隙在内)的单位体积重,单位重的大小决定于材料的矿物成份,结构和构造,即表示材料中固体物质重,与其体积(包括孔隙在内)的比例。随着国家建设的发展,工程项目的需要,此项试验应用是很广泛的,几乎在材料试验室中,都不能缺少它,在建筑材料试验中,单位重的试验方法是多种的,过去我们所用的方法,是先用人工把试件磨成近
(A) the question raised and its significance: Unit weight “Ya.” Refers to the stone (including pores) unit volume weight, unit weight depends on the size of the mineral composition, structure and structure of the material, which means that the solid material Material weight, and its volume (including porosity) ratio. With the development of national construction, engineering needs, the application of this test is very wide, almost in the material laboratory, can not be missing it in the construction materials test, the unit weight of the test method is a variety of past The method we use is to grind the test piece first by hand