Ocena nośności zbrojonych beleczek z zaprawy cementowej w różnych stanach zawilgocenia

Results of laboratory-tests concerning a comparison of strength and deformability of cement mortar in various states of humidity were presented in the work. It was found that the effect of strength and stiffness decrease in hydrated cement mortar caused by an increase of water contents (related to an occurrence of disjoining pressure on the internal surfaces of material caused by water and the Rebinder’s effect) brought inversely to a growth of load capacity of wet reinforced specimens in a comparison with dry ones. Such a fact testified that a reduction of britlleness of cement mortar, caused by an increase of non-linearity in stress-strain relation resulting from the disjoining action of water in pores of material, enabled a better redistribution of stresses in the wet specimens and a better utilisation of their load capacity.