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the effect of individual or combined use of silica based and alumino-silicate based supplementary cementing materials on the development of the compressive strength of concretes were studied. most important aim was to reveal if there is any advantage of the combined use of two supplementary cementing materials. Laboratory tests were carried out on standard cube specimens at the age up to 300 days. results revealed that the two scms could not necessarily contribute to a more effective performance in compressive strength, in the studied mixing ratios. keywords: supplementary cementing material, concrete, compressive strength Dr. adorján boroSnYÓi (1974) civil engineer (msc), PhD, associate professor at the Bme Dept. of construction materials and technologies. main fields of interest: application of non-metallic (FrP) reinforcements for concrete structures, bond in concrete, non-destructive testing of concrete. member of the Hungarian Group of fib and of fib tG 4.1 „serviceability models”. corresponding member of riLem technical committee isc “non-destructive in situ strength assessment of concrete”.

Development of compressive strength of HPC with the use of supplementary cementing material (SCM) combination