Poured-in-place concrete has been used for constructing walls of campus buildings, and for retaining walls on the grounds. Great skill is required by concrete masons with forming and pouring site-cast walls that often include form projections for reveals and textures. . For retaining walls over 18 inches high, a sandstone face is recommended.
Limestone is the preferred material for the application of stone facia panels and trim to campus buildings. Precast concrete is an acceptable substitute. Because precast panels can be formed under controlled production plant conditions, many architects prefer precast concrete panels which can be applied quickly and economically to the project. Precast concrete is used where limestone might have been used, such as in facia panels, window surrounds, and sculptural detail trim of all kinds.
Similar coloration to that of limestone is desirable. An aggregate mix to minimize spotting or peppering the appearance of the precast panel is recommended. At times an acid etch is applied to reach the desired textural finish.