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390mm× 190mm × 190mm混凝土小型空心砌块（以下简称390小砌块）发源于美国,迄今已有一百多年的历史,已成为国际现代建筑业的基本材料之一。在西方国家如美国及日本,小砌块已占建筑物墙体材料的40％-50％,而在我国还不足10％,其主要原因是没有专一的或成熟的小砌块砌体设计、施工规范,缺乏熟练的施工队伍,加上混凝土小型空心砌块在结构上存在的自身缺陷,使其建筑物的墙体存在着较为普遍的“裂、热、漏”的通病,阻碍了小砌块的推广应用。 一、390小砌块结构上的自身缺陷与建筑物墙体“裂、热、漏”通病的关系
390mm × 190mm × 190mm Small concrete hollow block (hereinafter referred to as 390 small block) originated in the United States, so far, a hundred years of history, has become the international modern construction industry, one of the basic materials. In Western countries such as the United States and Japan, small blocks account for 40% -50% of building wall materials, while less than 10% in China, mainly due to the lack of a dedicated or mature small block masonry design , Construction specifications, the lack of skilled construction team, coupled with the inherent shortcomings of the small concrete hollow block structure, so that the walls of its buildings there is a more common “crack, heat, leak” common problems, hinder the small The promotion and application of blocks. First, the 390 small block structure of the own defects and building wall “crack, heat, leakage,” the common problem