Hydration of C3S-pozzolana paste estimated by trimethylsilylation

✍ Scribed by H. Uchikawa; R. Furuta

• Publisher: Elsevier Science
• Year: 1981
• Tongue: English
• Weight: 794 KB
• Volume: 11
• Category: Article
• ISSN: 0008-8846
• DOI: 10.1016/0008-8846(81)90010-7

✦ Synopsis

The structure, quantity and the degree of polycondensation of silicate ion in C3S-pozzolana paste were examined and discussed in relation to the strength and the rate of hydration of C3S and pozzolana. Gel ,permeation chromatography was adopted to prepare the standard pure sample for the calibration curves and to determine the distribution of molecular weight of silicates. A small amount of monomer was found in the hydrates of C3S and C3S-pozzolana. Dimer decreased after a definite period and polysilicate increased gradually with age. The quantity and the degree of polycondensation of polysilicate in hydrate depend roughly on the silica content of pozzolana and the reactivity of silicate in pozzolana. Double chain structure of polysilicate was supported from the infra-red absorption spectra and the basic structure of polysilicate in hydrate was supposed to be identical regardless of the kinds of pozzolana and curing age.