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Quality requirements for cement concrete pad layer in composite plastic runway surface:

Release date:2018-04-10 Author: Click:

复合塑胶跑道


Quality requirements for cement concrete pad layer in composite plastic runway surface:

(1) general process.

1. Natural soil layer: the density is greater than 95%, and the moisture content is 8-12%. After rooting out the turf and the humus soil, the 8-12 ton roller was crushed down the longitudinal direction from both sides to 5-8 times.

2. Natural sand and stone layer: the thickness is about 150mm, the maximum particle size is not more than 2/3 of the thickness of the bottom layer, and the aggregate content is 60%, and the crushing pressure of 8-12 tons is used for 5-8 times.

3. Gravel cushion: the thickness is about 100mm, (the particle size is 30-60mm), and the crushing machine is crushed to the rock with 8-12 tons of roller, and the surface has no ripple, and the compaction density reaches 2.2 tons/m3. 4. Waterproof layer: with polyethylene film or PVC thickened waterproof film, the joint should be more than 200mm and the margin of the edge is greater than 150mm.

5. Cement concrete soil layer:

The overall laying of cement concrete above 250 shall be adopted, and the surface mortar shall be 1:1.

After the plate vibration, the cement slurry is made of wooden box, which makes the plastic cement stronger.

After the solidification of the cement, the gap is 4-5m (width 8-10mm, deep 30-40mm).

The thickness of cement concrete shall be about 100mm.

(2) quality requirements.

1. After the foundation is completed, the cement surface shall not be too smooth, and there shall be no sand, peeling and crack, etc.

2. Flatness: 3m ruler allows error within 3mm.

3. Slope: conforms to the sports technology index.

4. Compressive strength: R20>25kg/ sq cm R50>10kg/ cm.

5. Water-free phenomena on the base surface.

6, warranty: outdoor temperature above 25 ℃ for 24 days. The outdoor temperature is 15 to 25 and 30 days. The outdoor temperature is 25 degrees below 60 days.

(in the volatile cement, the alkaline component, during the maintenance period more water)

7. Before the plastic layer is laid, the base layer shall be oil-free, ash free and dry.


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