Single-sided composite wallboard and wall comprising same

The single-sided composite wallboard comprises a thermal insulation layer, a prefabricated protective layer is arranged on one side of the thermal insulation layer, a first lap joint opening and a second lap joint opening are formed in the opposite corners of the thermal insulation layer respectively, the first lap joint opening comprises a first side face and a bottom face, and the included anglebetween the first side face and the bottom face is set to be alpha; the second lap joint opening comprises a second side face and a top face, the included angle between the second side face and the top face is set to be beta, and beta = alpha < 180 degrees; the top surface and the bottom surface are equal in size; one side face of the protective layer is flush with the first side face, and the other side face of the protective layer is flush with one side end face of the heat preservation layer. According to the wall body formed by splicing the single-sided composite wallboards, the masonry joint is similar to a Z sh