Combined with DTG analysis, X-Ray diffraction analysis （XRD） and field emission scanning electron microscopy analysis （FSEM） affiliated with energy dispersive spectrometer analysis （EDS）, the early hydration and...Combined with DTG analysis, X-Ray diffraction analysis （XRD） and field emission scanning electron microscopy analysis （FSEM） affiliated with energy dispersive spectrometer analysis （EDS）, the early hydration and carbonation behavior of cement paste compacts incorporated with 30% of dolomite powder at low water to cement ratio （0.15） was investigated. The results showed that early carbonation curing was capable of developing rapid early strength. It is noted that the carbonation duration should be strictly controlled otherwise subsequent hydration might be hindered. Dolomite powder acted as nuclei of crystallization, resulting in acceleration of products formation and refinement of products crystal size. Therefore, as for cement-based material, it was found that early carbonation could reduce cement dosages to a large extent and promote rapid strength gain resulting from rapid formation of products, supplemental enhancement due to water release in the reaction of carbonation, and formation ofnanometer CaCO3 skeleton network at early age.展开更多
将一定煅烧制度下所得的轻烧白云石掺入硅酸盐水泥,研究了轻烧白云石对水泥物理、力学性能的影响,同时采用X R D,DT A对水泥的水化性能进行了研究。将掺入轻烧白云石水泥的力学性能与掺入活性氧化镁、石灰石以及白云石水泥的力学性能进...将一定煅烧制度下所得的轻烧白云石掺入硅酸盐水泥,研究了轻烧白云石对水泥物理、力学性能的影响,同时采用X R D,DT A对水泥的水化性能进行了研究。将掺入轻烧白云石水泥的力学性能与掺入活性氧化镁、石灰石以及白云石水泥的力学性能进行了对比后发现,轻烧白云石的掺入使得水泥能够获得比掺活性氧化镁和石灰石粉更好的力学性能,也显示了优于掺入白云石后水泥的力学性能。展开更多
基金Funded by the National Key Research Program(973 Program)(No.2013CB035901)the National Natural Science Foundation of China(No.51379163)
文摘Combined with DTG analysis, X-Ray diffraction analysis （XRD） and field emission scanning electron microscopy analysis （FSEM） affiliated with energy dispersive spectrometer analysis （EDS）, the early hydration and carbonation behavior of cement paste compacts incorporated with 30% of dolomite powder at low water to cement ratio （0.15） was investigated. The results showed that early carbonation curing was capable of developing rapid early strength. It is noted that the carbonation duration should be strictly controlled otherwise subsequent hydration might be hindered. Dolomite powder acted as nuclei of crystallization, resulting in acceleration of products formation and refinement of products crystal size. Therefore, as for cement-based material, it was found that early carbonation could reduce cement dosages to a large extent and promote rapid strength gain resulting from rapid formation of products, supplemental enhancement due to water release in the reaction of carbonation, and formation ofnanometer CaCO3 skeleton network at early age.
文摘将一定煅烧制度下所得的轻烧白云石掺入硅酸盐水泥,研究了轻烧白云石对水泥物理、力学性能的影响,同时采用X R D,DT A对水泥的水化性能进行了研究。将掺入轻烧白云石水泥的力学性能与掺入活性氧化镁、石灰石以及白云石水泥的力学性能进行了对比后发现,轻烧白云石的掺入使得水泥能够获得比掺活性氧化镁和石灰石粉更好的力学性能,也显示了优于掺入白云石后水泥的力学性能。
