Abstract

Antikolonial Prodjosantoso¹, Wahyu Widiyati¹, Wafin¹, Ani Widyawati² and Maximus Pranjoto Utomo¹

DOI : http://dx.doi.org/10.13005/ojc/370310

Dicalcium silicate (Ca2SiO4) isan importantcomponent of cement. The compound ofCa2-xSrxSiO4 can be formed if the Sr containing precursorsare used to synthesize the cement. The presence of Sr may alter the hydrationof the product. The hydration chemistry ofCa2-xSrxSiO4 compounds is reported.
The hydration of Ca2-xSrxSiO4was conducted uder nitrogen atmosphere for about 6 months. The dry samples were characterized usingXRD, FTIR, TGA-DSC, andSEM-EDXmethods.
It is confirmed that the hydration ofCa2-xSrxSiO4produces mainlyCa3Si2O7.3H2O and Ca(OH)2. However, the Sr doped Ca3Si2O7.3H2O andCa(OH)2 are possibly formed.The compound of CaCO3,as the result ofinteractions between Ca(OH)2 and atmospheric CO2gas during the sample handling,is also observed.

Cement; Ca2-xSrxSiO4; Ca(OH)2; Dicalcium silicate; Hydration

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