ABSTRACT

The compressive strength shall be calculated by dividing the maximum load by either (a) the gross cross sectional area of the specimen or (b) the nett cross sectional area of the units or (c) the mortar bedded area. The strength shall be reported to the nearest 0.05 N/mm2 for individual results. The secant modulus shall be determined, if required, by dividing the stress increment between one twentieth and one third of the ultimate stress by the associated strain increment.