This standard specifies the dimensions, physical requirements, and testing methods for hollow clay tiles used as filler blocks in concrete floors and roofs. It ensures the tiles possess adequate compressive strength and acceptable water absorption to safely reduce the dead weight of ribbed concrete slabs without compromising structural integrity.
Hollow clay tiles for floors and roofs, Part 1: Filler type -
Quick Reference Values
Maximum water absorption20% by mass
Maximum efflorescenceSlight
Typical Minimum compressive strength15 N/mm² (over gross area)
Practical Notes
Hollow clay tiles significantly reduce the dead weight of roof slabs (often used in filler slabs) while improving thermal and acoustic insulation.
Tiles must be thoroughly soaked in water before placing concrete or mortar to prevent them from absorbing mixing water and weakening the bond.
Careful handling during transit and installation is required; tiles with cracked or damaged webs compromise the structural capacity of the floor.