1.1本规范涵盖了由蒸压加气混凝土（PAAC）制成的固体非承重和承重预制混凝土墙单元，PAAC是一种基于硅酸钙水合物的水泥制品，其中通过加入导致宏观孔隙的药剂实现低密度，并进行高压蒸汽养护。预制蒸压加气混凝土墙体单元为大尺寸实心矩形棱柱体，采用薄层砂浆铺设。本规范涵盖的安装装置应使用PAAC制造商认可的涂层材料进行保护，以防直接暴露在湿气中。

1.1 This specification covers solid nonload-bearing and load-bearing precast concrete wall units made from autoclaved aerated concrete (PAAC) is a cementitious product based on calcium silicate hydrates in which low density is attained by the inclusion of an agent resulting in macroscopic voids and is subjected to high-pressure steam curing. The precast autoclaved aerated concrete wall units are large-size solid rectangular prisms, which are to be laid using thin-bed mortar. Installed units covered by this specification shall be protected against direct exposure to moisture using a coating material accepted by the PAAC manufacturer.