摩崖石刻危岩加固所用水泥类灌浆材料的评价研究

发布时间：2018-05-27 23:01

本文选题：水泥 + 析盐　；参考：《文物保护与考古科学》2017年03期

【摘要】：水泥在历史建筑保护中使用一直存在很大争议,主要表现为强度过高、与建筑物本体相容性差、易析盐,以及有碍于体现建筑物的历史价值。很多早期的加固案例也显示出它的种种弊端。但是,水泥作为摩崖石刻等危岩体的加固材料,在我国依然有不少应用。目前,对于这类加固灌浆材料的的问题很少研究,对相关弊病缺乏评价,因此也难以提出改进措施。为此,本研究通过对不同种类水泥以及不同添加剂改性的水泥灌浆材料的工作性能、力学性能以及离子溶出性进行了研究,以探讨水泥类灌浆材料用于摩崖石刻危岩加固的适宜性。结果显示,添加有机硅在不影响水泥浆工作性能和强度的情况下,可以有效抑制水泥中可溶性离子的析出;超细水泥在强度、抗析盐和防水性能上比普通水泥具有一定优势,但发现市售超细水泥中CaSO_4含量较高,导致SO_4~(2-)析出量较大。若摩崖石刻危岩加固需要使用水泥砂浆灌浆,建议选用CaSO_4含量低的超细水泥,添加适量有机硅,并通过进一步实验获得离子溶出量较低的最佳配方。本研究成果可为未来灌浆加固材料选择提供借鉴。
[Abstract]:The use of cement in the protection of historical buildings has always been controversial, mainly for its high strength, poor compatibility with the building body, easy salt evolution, and hindering the historical value of the building. Many early reinforcement cases also show its drawbacks. However, cement, as a reinforcement material for dangerous rock mass such as cliff stone carving, still has many applications in our country. At present, there is little research on this kind of reinforcement grouting material and lack of evaluation of the related defects, so it is difficult to put forward the improvement measures. Therefore, the working properties, mechanical properties and ion dissolution of cement grouting materials modified by different kinds of cement and different additives were studied. This paper discusses the suitability of cement grouting material for reinforcement of cliff rock. The results show that the addition of organosilicon can effectively inhibit the precipitation of soluble ions in cement without affecting the working properties and strength of cement, and the superfine cement has some advantages over ordinary cement in strength, salt evolution resistance and waterproofing. However, it is found that the high content of CaSO_4 in the superfine cement on the market results in a large amount of SO4C _ 2). If cement-mortar grouting is needed to reinforce the rock of cliff stone, it is suggested to select ultra-fine cement with low CaSO_4 content, add appropriate amount of organosilicon, and obtain the best formula of low ion dissolution through further experiments. The results of this study can be used for reference for the selection of grouting reinforcement materials in the future.
【作者单位】：浙江大学化学系;浙江大学文物与博物馆学系;浙江华东建设工程有限公司;
【基金】：国家科技支撑计划资助(2012BAK14B05) 国家重点基础研究发展计划(973计划)资助(2012CB720902)
【分类号】：K879.4;TQ172.7

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