水泥净浆电性能及其与抗压强度的关系

Electrical Characteristic of Cement Paste and Its Relationship with Compressive Strength

测定了不同水泥净浆电阻率随时间的变化及相应的立方体抗压强度.研究表明,在相同水灰比条件下,高标号水泥净浆电阻率先低于低标号水泥净浆电阻率,而后迅速高出.采用幂函数回归建立了同种水泥1 d电阻率与水灰比的关系.建立了水泥净浆立方体2 d抗压强度与水泥净浆1 d电阻率的线性关系,建立了7,28 d抗压强度与水泥净浆1 d电阻率的对数关系.

The electrical resistivity development and the compressive strength of different cement pastes were tested. The results show that the electrical resistivity curves were different between the different cement grades with the same ratio of water-cement. The electrical resistivity of paste with the high grade cement is lower than that of the low grade cement paste at early period; however, it exceeds the other at the later period. A power function equation is fitted between electrical resistivity at 1 d and mw/mc for the same cement. A linear relation is established between the compressive strength at 2 d and the electrical resistivity at 1 d, and a logarithmic relation is established between the compressive strength at 7 d or 28 d and the electrical resistivity at 1 d.