骨料种类对糯米灰浆性能的影响

采用灰浆性能表征并辅以扫描电镜（SEM）和X射线衍射（XRD）等技术手段，测定了制备的糯米灰浆的表面强度、抗压强度、抗冻性等性能，探讨了骨料的种类、粒径以及掺量对糯米灰浆性能的影响。结果表明：砖颗粒、河砂、石英砂3种骨料的掺入，使糯米灰浆的收缩性和抗冻性均得到较大改善。其中，砖颗粒骨料的加入使糯米灰浆的抗冻性较空白样品提高了125%；但随着骨料粒径和骨灰比的增大，掺入骨料糯米灰浆的抗压强度、抗冻性和收缩率呈下降趋势。因此，在砖石质文物的保护中，建议使用砖颗粒作为糯米灰浆的骨料，并将骨料粒径控制在3 mm以下，骨料/灰的比值控制在2∶1以下，对改善糯米灰浆的性能效果最佳。

Influence of aggregate type on the properties of traditional sticky rice-lime mortar

The properties such as surface hardness, compressive strength, freeze-thaw resistance and other properties of the prepared glutinous rice mortar were determined by mortar performance. The influence of the species of aggregate, the size of the particle and the amount of the aggregate on the properties of glutinous rice mortar are discussed and its action mechanism is explored by means of SEM and XRD. Results show that the addition of silica sand, river sand and brick grain improve the shrinkage and freeze-thaw resistance. Among the three aggregates, brick grain make the freeze-thaw resistance of sticky rice-lime mortar increased by 125% compared to blank sample. However, with increase of aggregate particle size and bone ash ratio, the compressive strength, freezing-thawing resistance and shrinkage of aggregates decreased. Therefore, for the protection practice of brick cultural relic, it is suggested that the brick grain is added as the aggregate, the grain size is controlled to be within 3 mm, and the aggregate to lime ratio below 2:1, which is the optimal way to improve the performance of glutinous rice mortar.