Abstract:The effects of vinyl redispersible polymer(VRP) on the hydration products of cement pastes within hydration time of 72 h were investigated through step scanning X-ray diffraction(XRD),()~(29)Si nuclear magnetic resonance(NMR) and environmental scanning electron microscopy(ESEM) techniques.The results show that VRP postpones the formation time of crystalline ettringite(AFt),calcium hydroxide(Ca(OH)_2) and calcium silicate hydrate(C-S-H) gel of cement pastes,and decreases the content of these three hydration ...
