论文部分内容阅读
应用纳米压痕技术对水泥净浆以及掺磨细矿渣的水泥浆体中各个区域的弹性模量、硬度等微观力学性能进行了测试和计算,同时,利用Gaussian函数对弹性模量、硬度的频率分布曲线进行了多峰拟合,获得水化产物中毛细孔、高密度C-S-H凝胶、低密度C-S-H凝胶以及氧氧化钙相关参数的统计分布。结果表明:水泥净浆中高密度C-S-H凝胶硬度及弹性模量随着水化龄期的延长而提高,体积含量增大;磨细矿渣的掺入能使水化后期浆体中C-S-H的硬度和弹性模量出现一定幅度的增大;当磨细矿渣掺量达到50%时,频率分布拟合曲线中没有氢氧化钙峰出现,说明大量磨细矿渣的二次水化消耗了浆体中大部分氢氧化钙。
The nano-indentation technique was used to test and calculate the micro-mechanical properties such as elastic modulus and hardness of cement paste and cement paste mixed with fine slag. At the same time, Gaussian function was used to measure the elastic modulus and hardness frequency Distribution curves were multi-peak fitted to obtain the statistical distribution of parameters related to capillary pores, high-density CSH gel, low-density CSH gel, and calcium oxide hydrate in the hydration product. The results show that the hardness and elastic modulus of high density CSH gel in cement paste increase with the increase of hydration age and the volume content increases. The incorporation of ground slag can make the hardness and When the content of ground slag reaches 50%, there is no calcium hydroxide peak in the fitting curve of frequency distribution, indicating that secondary hydration of a large amount of finely ground slag consumes large amount of slurry Part calcium hydroxide.