THE HYDRATES AND MICROSTRUCTURE OF PERMEABLITY RESISTING PORTLAND CEMENT

The hydrating products and microstruc-ture of permeablity resisting Portland cement have been studied by x-ray diffraction (XRD) and electron mi-croscopy (EM). The hydrates such as calcium silicates hy-drate and calcium sulphaluminate hydrate, ettringite crys-tal of needles can be observed under the EM, most of which were filled into pores of hardened cement paste.