硅酸乙酯类加固材料在潮湿环境土遗址加固保护中的应用研究

Application of ethyl silicate as a strengthening agent for consolidation and conservation of earthen sites under moisture circumstances

潮湿环境土遗址因含水率高、成分及所处环境复杂等特点,是文物保护工作中最难保护的文物之一,深入开展加固保护材料适用性及优化组合研究对于潮湿环境土遗址保护具有现实意义。以上海广富林文化遗址"F12房址"为对象,选取硅酸乙酯类加固材料Remmers SAE 300和SAE 300E,对其不同比例配合下的加固效果进行试验研究。通过表观形貌、渗透性、强度及抗水崩解性等指标分析,结果表明不同比例配合下的加固效果虽存在一定差异,但均能有效提高土体抗粉化能力和抑制霉菌生长,且当含水率较低时,加固作用将显著提高土体无侧向抗压强度和抗剪强度。研究结果对综合评定硅酸乙酯类加固材料在潮湿环境土遗址加固保护中的应用性有参考价值。

Due to high moisture content,complicated composition and circumstances,the conservation of earthen sites under conditions of high moisture is one of the most difficult problems in cultural heritage protection. Thereforeresearch on utility of reinforcement materials and portfolio optimization are of practical significance. Based on the existing research and cases,three protective materials were chosen as strengthening agents,and a series of indoor and field tests were carried out and are described in this paper. The strengthening effects of different proportions of the strengthening agents and select the optimum performance indicators,such as morphology,penetration depth,strength and collapse resistance were compared. The tests show that using the chosen strengthening agents and the proper proportions can give good reinforcement effects,such as improve resistance to pulverization and inhibition of the growth of fungi. Furthermore,it can significantly improve the unconfined compressive and shear strength of soil specimens when the moisture content is low. Therefore the results of the studies can be applied to the consolidation and conservation of earthen sites under moisture conditions.