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本文是“活性β—C_2S的研究”一文的继续,着重研究了这种活性β—C_2S的水化性能:净浆小试体测定它的抗压强度表明它的早期强度尤其是14天～1个月之内的强度特别高,它是普通高温烧制的β—C_2S的10倍,甚至略高于C_3S同期龄强度。它的半年强度值,普通C_2S要水化一年才能达到。用微量导热仪测定的早期水化20分钟水化放热速率是7.25cal/g.hr而普通C_2S为1.212cal/g·hr。DTA和TMS—GLC测定水化速度亦证明它比普通C_2S要快,TMS—GPC测定水化产物C—S—H凝胶中硅酸盐阴离子的聚合度,活性β—C_2S水化7天的Mw/Mh为2.02,而普通C_2S仅1.33。此外还用SEM观察到两种C_2S的水化产物形貌也有所差别。
This article is a continuation of the article “Study on Active β-C_2S” and focuses on the hydration properties of this active β-C 2 S: The small-scale test of the paste to determine its compressive strength indicates that its early strength is especially 14 days to 1 The intensity within a month is particularly high, which is 10 times that of ordinary high-temperature firing of β-C_2S, and even slightly higher than that of C_3S at the same age. Its half-year strength value can only be reached if ordinary C_2S is to be hydrated for one year. The early hydration hydration rate measured with the microcalorimeter for 20 min was 7.25 cal/g.hr and the ordinary C 2 S was 1.212 cal/g·hr. The determination of hydration rate by DTA and TMS-GLC also proved that it was faster than that of ordinary C2S. TMS-GPC was used to determine the degree of polymerization of silicate anions in the hydration product C-S-H gel. The activity of β-C_2S was hydrated for 7 days. Mw/Mh is 2.02, while ordinary C_2S is only 1.33. In addition, the morphology of the two hydration products of C 2 S was also observed by SEM.