Organic additive implantation onto cement hydration products

Abstract

In polymer modified cementitious materials, it is hard to set up a chemical connection between the added polymer and the cement moiety. In this study FS (functional silane) was adopted to form this connection as a bridge component which has the functional group forming bonds with polymer. To testify the connection between FS and cement moiety, Q ²/Q ¹ ratio (Q ^x: intensity ratio) investigation was carried out by the means of quantitative solid state 29Si MAS NMR. The results show that the Q ²/Q ¹ ratio has increased with the addition of FS which indicates that the silicon chain length has increased, and the quantity of silicon atoms at site of Q ², chain site, has enhanced, showing that the silicon atom of FS has connected to the silicon chain of cement moiety by the bond “-Si-O-Si-” formation.

Keywords

cementitious material / modification / functional silane / interaction relationship

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