Nowadays the steel industry in Brazil generates about 5 million tons of LD steel slag annually. Recently some studies with its use in cement production have shown promise, once that after heat treatment and chemical modifications it can present phases with similar hydraulic properties to Portland cement and equivalent compressive strength as well. In this context, the present work aimed to investigate the feasibility of using LD slag for production of a Portland cement Class-E, in the face of chemical modifications of the liquid slag followed by a fast-cooling heat treatment and chemical analysis carried out by ICP-OES techniques and also a compressive strength test according to the NBR 7215 standard. In addition, based on the results of the compression test and to optimize the amount of material used, a correlation study was carried out between specimens in accordance with the standard (5X10cm) and smaller specimens (1X2cm), in order to use an appropriate lab compressive machine. The results showed that the mixtures using 75 percent Portland II Cement F-32 and 25 percent Novo Clinquer (chemical and heat-treated LD slag) and that one with 50-50 ratio using the same materials, were the mixtures that fully satisfied the minimum compressive resistance condition required by the NBR standard, concerning Type II Class Portland Cements, after 28 days of curing. In addition, the results showed feasibility in the correlation of specimens, thus making it possible to perform mechanical tests with specimens with a dimension of 1x2 cm.