The similarities and differences between suspended industrial floors and conventional ground-supported floors are discussed, considering only floors with concrete wearing surfaces finished by power trowelling. The compared performance and specification criteria include: load capacity, durability, structural robustness, abrasion resistance, settlement, load-induced elastic deformation, flatness, curling, joints, drying, shrinkage, and random cracking. A minimum concrete strength class of 32/40 is recommended, avoiding very high cement contents. Clients should be advised that suspended slabs often exhibit random cracking, and that flatness tolerance levels greater than SR3 are difficult to achieve. 2 refs.
Primary author(s): Simpson D
Vol.38, No.2, 2004, p.16,18