| Abstrakt: |
In this work, the calcium silicate hydrate was synthesized efficiently using the solution reaction of calcium nitrate (Ca(NO3)2.4H2O) and sodium nitrate (Na2SiO3.9H2O) at the C/S ratio of (0.8,1.2,1.5). The disciplinarian of C/S ratio with the calcium silicate hydrate was analyzed by XRD, SEM, IR, NMR. The experimental results showed that it could shorten the reaction time to 5 days, reduce the influence of the CO2 in the air on the purity and ensure the quality of products controllable, when the calcium silicate hydrate was synthesized in nitrogen environment and with the ultrasonic dispersion; the d-spacing of (002),(101) and (200) decreased, the polymerization of silica tetrahedra of calcium silicate hydrate decreased 28.7%, the microstructure of calcium silicate hydrate varied from layer to irregular congeries and became denser as the C/S ratio increased from 0.8 to 1.5. |
