This research gave a comprehensive practical study on the use of Nano-Concrete. Nano-Concrete is a new generation for special high performance
concrete, it has many benefits. This study includes the usage of Active Nano-clay and Nano-Silica with different percentages: 3%, 5%, 7% and 1%,
2%, 3%, respectively as a replacement of cement content in concrete to get the optimum value to use. The methods of mixing (wet/dry) of these Nano-
Materials are taken into consideration to deal with site/lab cases. Some properties of fresh and hardened concrete were measured. The absorption and
elevated temperature also, had its share of attention in case of one hour, two hours and two hours with sudden water-cool to measure an indication for the
loss of compressive strength during cool process to ensure its durability. Ultrasonic wave velocity test was used to evaluate the quality of concrete (before
and after) absorption and elevated temperature tests. The results showed significant studies, relationships and equations between compressive, indirect
tensile and flexural strengths at different ages, as well as equations for predicting of compressive strength from ultrasonic wave velocity.
Author(s): Sayed Abd Elbaky, and Sameh Yehia