添加剂对传统糯米灰浆性能的影响及其机理  

Influence of Admixtures on Properties of Traditional Sticky Rice-lime Mortar and Their Mechanisms

作　　者：魏国锋[1,2] 张秉坚[1,2] 方世强[3] 

机构地区：[1]浙江大学文物与博物馆学系,杭州310027 [2]浙江大学化学系,杭州310027 [3]浙江工业大学化学工程与材料学院,杭州310014

出　　处：《土木建筑与环境工程》2011年第5期143-149,共7页Journal of Civil,Architectural & Environment Engineering

基　　金：国家科技支撑计划资助项目(2010BAK67B16);浙江省文物保护专项(浙财教[2010]264号);中国博士后科学基金资助项目(20100471728)

摘　　要：糯米灰浆是中国古代建筑史上的一项重要科技发明,为了使该传统工艺科学化地为现代文化遗产保护服务,采用SEM和XRD等技术手段,探讨了纸筋、硫酸铝和二水石膏3种添加剂对糯米灰浆性能的影响及其机理。结果表明:纸筋对糯米灰浆抗压强度和耐冻融性的改进最为明显;硫酸铝对改善糯米灰浆的干燥收缩性效果最佳;二水石膏的加入,对样品的耐冻融性并无改进,而且,随着其含量的增加,样品的抗压强度和表面硬度增幅降低。在文化遗产保护实践中,建议采用6%的硫酸铝或3%的纸筋作为糯米灰浆的添加剂。On the basis of characterization of property of traditional sticky rice-lime mortar, influence of admixtures （aluminum sulfate, gypsum, paper fiber） on properties of traditional sticky rice-lime mortar and their scientific mechanisms are discussed by means of SEM and XRD. It is indicated that paper fiber is the most effective admixture to endure freezing-thawing cycles and increase compressive strength of sticky rice-lime mortar due to disorderly distribution and water-retaining of paper fiber, and the use of aluminum sulfate reduces dry shrinkage values and improves compressive strength because of formation of ettringite in sticky rice-lime mortar. Gypsum is proved to be ineffective to modify freezing-thawing cycles of sticky ricelime mortar. Meanwhile, compressive strength and surface hardness of sticky rice-lime mortar with gypsum decline as gypsum amounts. It is suggested that 6% aluminum sulfate or 3 % paper fiber can be used as admixtures of sticky rice-lime mortar in conservation of cultural relics.

关 键 词：糯米灰浆 纸筋 硫酸铝 二水石膏 

分 类 号：TU58[建筑科学—建筑技术科学]