The Effect of Adding Selected Nanoparticles on the Mechanical Properties of the Cement Matrix of Self-compacting Concrete

摘要

The interest in nanomaterials as an addition that improves the properties of concrete has been growing for more than a decade. One of the principal ways of evaluating concretes is the testing of their micro- and nanohardness by means of nanoindentation. This paper presents the results of nanoindentation tests of hardened self-compacting concrete modified with different amounts of nanoparticles. The investigations covered a reference series of self-compacting concrete without any nanoparticle addition and ten concrete series modified with different amounts of SiO_2, TiO_2 and Al_2O_3 powder nanoparticles. An analysis of the test results is carried out and conclusions are drawn.