The change of electrical resistivity can be used to monitor the hydration in cement-based materials. A non-contacting electrical resistivity measurement device was invented to detect the hydration of cement-based materials. This measurement overcomes the polarization effect and contacting problem between specimen and electrode in conventional method. The principle, equation derivation, experimental process about the non-contacting method is also given in this paper. An application of electrical resistivity used to interpret the effect of calcium sulfate on the hydration of cement.

  • INTRODUCTION

  • DERIVATION OF RESISTIVITY CALCULATION FORMULA

  • MEASURING SYSTEM

  • HYDRATION OF CEMENT PASTE WITH CALCIUM SULFATE

  • CONCLUSIONS

  • REFERENCES

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