Study the possibility of using hydrated cement in cement mortar

Recently, the high demand for expanding and building with improve the infrastructure have significant influence on the cement production. This resulting in high demand on cement quality and properties such as workability and other properties. However, the environmental challenges are the main problem facing the cement especially with cement storage. Many researchers work on this point by adding different materials to enhance the storage conditions. This work is very important by using hydrated cement (HC) to obtain a good property. For this purpose, a different replacement proportions of hydrated cement (0, 10, 20, 50, 100%) was used by weight of cement. Two types of cement mortar mixes were used namely 1:2 and 1:3 and also different water-cement ratios. The mechanical properties of cement mortar were assessed in terms of compressive strength, flexural strength, and tensile strength at ages (3, 7, 28, and 90) days. Through the test program, the results offered that the amount of water required for the mix 1:2 and 1:3 increases with the increase in HC. The compressive, flexural, and tensile strength of the cement mortar gradually decreases as the proportion of the HC increases in all mixtures and for all ages. The dosage of 10% HC can be used with cement in infrastructure projects due to its affinity with the engineering properties of cement.