Action Synchro 4+2 Section 09 65 00 Polyurethane Floor ...
3. Concrete shall not use river gravel or pea gravel and have an averageof 3500 psi. compressive strength after 28 days. Concrete must be cured for 60 days before installation can begin. 4. The concrete slab shall be depressed: 6mm (0.236 in). 5. No curing agents or …