Investigação da resistência à compressão e da resistividade elétrica de concretos com diferentes tipos de cimento

This work studied the influence of four Brazilian types of cement on the compressive strength and electrical resistivity in samples of concrete. Three water/binder ratios were analyzed, which led to the preparation of twelve different samples. The results show that the types of cement has a direct influence on both tests. In general, compared to a reference, the cements with additions of blast furnace slag and pozzolans reduced the strength, but increased the electrical resistivity. It was also observed that the cement with pozzolan showed the highest gain in strength with time, although it resulted in the lowest absolute value. The results also indicated that the electrical resistivity increases with time and decreases with higher water/binder ratios. A good correlation was found between the mentioned tests with R2 ranging from 0.823 to 0.999.

Keywords:compressive strength; electrical resistivity; cements; blast fumace slag; pozzolan.