The basic components of the concrete mixture are cement, aggregates (sand and gravel) and water. And in some other
cases, there may be other components of the concrete mixture besides the main components, which are chemical additives which
are used for the purpose of improving some of the properties of concrete. This research dealt with the study of mechanical
properties of modified concrete by adding Super Plasticizers (SP) type of Sikament_NN and its effect on determining the changes
occurring in the resistance to pressure and indirect tension of concrete mixtures taking into account the following variables and
influences: - Type of concrete used in this work ordinary concrete with grade 40 and modified concrete in addition. And doses of
Sikament_NN were (0.5 - 1.5 - 2.5 and 3.5) % of the weight of cement (added to the mixing water). Under the influence of
immersion treatment ages 7 and 28 days.
