Where mathematics often views the number line as infinitely dense and uncountable, the proposition is offered that the number line, while infinite in extent, is countable.
An experimental study on the effect of inclusion of three different types of fillers on mechanical properties of concrete is carried out. This paper presents the results of laboratory tests of 72 concrete cylindrical specimens of 10 cm diameter and 20 cm length with inclusion of Vf=10% of steel fillers, cast iron fillers and stone powder fillers in the concrete mix. Permeability, Compressive strength and splitting tensile strength are investigated by comparing the density of different types of concrete. Test results demonstrated that the stone powder fillers significantly improve mechanical properties of concrete while the cast iron fillers decline.
The interaction that occurs when combining surfactants is more than the sum of the properties of each surfactants. These interactions can either enhance or detract from the action of these surfactants as air entraining agents. In an attempt to understand these interactions of some surfactants used as air entraining agents, the effect of several air-entraining agents was compared, in addition to two mixtures of them. The results show that CABP surfactants can be used lonely and in conjunction with other surfactant groups, taking into consideration that the compatibility of betaines with anionic surfactants is better than that with cationic surfactants. Higher compressive strength and less pore size appeared when using LM solo and in mixes which demonstrates the positive impact of using LM in these mixes