One, requirements for walling stone construction

(1) Masonry for retaining wall construction requires mortar materials, including cement, sand, and water, which must comply with construction specifications. The mortar should match the design grade specified in the construction details and must be mixed thoroughly. The mixed mortar should be used up before it sets.

(2) The masonry body must be constructed with slurry laying. When building, apply the mortar first before laying the stones. The stones should be layered and pressed with staggered joints both vertically and horizontally for stability. The height difference between adjacent work sections should not exceed 1.2mm, and each layer should be roughly leveled. The sectioning should be as close as possible to settlement or expansion joints.

(3) Prior to applying mortar, stone materials should be wetted with water to ensure their surfaces are fully saturated, without any standing water remaining. The thickness of the joint should generally be between 20-35mm, and larger gaps should be filled with crushed stone.

All stones must be laid on freshly mixed mortar, ensuring it is thoroughly saturated. Stones should not be directly touching in the seams; the use of stones standing on the exterior and filling the center is not permitted.

(5) Mortar must be well-filled, with natural, even, and aesthetically pleasing joints, and the block stone shapes should be smooth and flat. Any mortar splatters on the masonry surface should be cleaned off.

(6) Structural dimensions and locations of the masonry must comply with the construction details. Surface deviations within a 2m range must not exceed 30mm. Masonry joint widths: horizontal joints 15mm, vertical joints 20mm.