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我国部分山地蕴藏着一种石材,将其加工成片状可用做屋石板,这种石板的主要特点是经久耐用。过去它的使用对象大部分是农民住房,目前使用范围正逐渐增大,有些学校机关宿舍等也使用它做为屋面材料。为了研究这种天然石材是否能够比较广泛地应用于一般的民用建筑,从以下几方面来加以分析,并与普通粘土瓦进行比较:1.成本:根据北京市郊区两个农业生产合作社(辛庄社和永定社)的生产数字,计算三种使用较广的不同规格的石板的成本列表如下: 表1
Some mountainous regions in China contain a kind of stone, which can be processed into sheets and can be used as house slate. The main feature of this slate is its durability. In the past, most of its use was in farmer’s housing, and the scope of its current use is gradually increasing. Some school institution dorms use it as a roofing material. In order to study whether this natural stone can be widely used in general civil buildings, the following aspects are analyzed and compared with common clay tiles: 1. Cost: According to the two agricultural production cooperatives in the suburbs of Beijing (Xinzhuang The production figures for the company and Yongding agency) are used to calculate the cost of the three different types of stone slabs that are widely used: