Cement concrete foundation construction requirements

1. The flatness, smoothness qualification rate of over 95%, 5 meters straight edge error of 3 mm.

2. The degree of slope: center site 3 ‰, 4 ‰, type of curvature of the drainage design. Straight corner 8 ‰, 5 ‰, semicircle area 5 ‰, surface should be flat, smooth, ensure the drainage.

3. The strength and stability:

Homogeneous solid surface, no cracks, no bad side, seam straight smooth, about 6000 mm x 6000 mm slices as well. Cushion layer compaction, its density is greater than 95%, after the medium mill pressure had no significant, eluvial soil loose, the wave of the wheel track.

4. Water-resisting layer: the more new PVC waterproof membrane, should take it day to 200 mm, the edge margin is greater than 150 mm.

5. Warranty: basic maintenance period for 21 days.

6. Location: needed for accurate construction and painting line, apply strong distinctive mark field of each line marker.

Asphalt foundation construction requirements

1. Flatness: base should have a certain strength and stability, foundation cracks and can't products caused by uneven frost heave of frozen, flatness qualification rate of over 95%, 3 m straight edge error 3 mm.

2. The degree of slope: transverse longitudinal < < 1%, 1 ‰, the high jump area < 4 ‰, the surface should be flat and smooth to ensure the drainage.

3. The strength and stability:

Asphalt base had better use do not contain wax, or asphalt materials containing wax rarely, it must fully compacted asphalt mixture. Evenly on the surface of a solid, smooth without crack, without bad side pile-up, textured, with no seams smooth smooth. Asphalt concrete pavement crushed gravel is 2, 5 mm, 5.8-6.4% oil content, particle size of the bonding layer of gravel for the 6 -- 9 mm, 4.6-5.8%, no soft peeling, no eluvial soil loose, such as wave phenomenon.

4. The row of water: drainage system in two hours must discharge water after the heavy rain.

5. Warranty: basic maintenance period of 28 days.