مرکز منطقه ای اطلاع رساني علوم و فناوري - The effects of super plasticizer and trass on the cement hydration

Abstract :

In this study, the development of hydration of Portland cement and trass substituted cements containing super plasticizer was investigated. The effects of super plasticizer and trass substitution on the compressive strength, water demand, volume expansion and setting time was determined by the experiments the standard cement. Cement pastes were prepared with Portland cement and trass containing super plasticizer were performed using X–Ray diffraction, Fourier transform infrared spectroscopy and Simultaneous thermal analysis in order to determine their the phases developed during the hydration. Furthermore, microstructures by scanning electron microscope 28-days of hydration of cement pastes were determined and cement mortars were examined with strength tests. As a result, with the amount of trass, water needs and setting time have increased and volume expansion values remained between the standards. Also, the amount of Ca(OH)2 which is formed during the reaction was decreased. All these differences influenced the compressive strength of mortar samples.