海上丝绸之路窑址裂隙充填灌浆材料比选室内试验研究

对裂隙进行充填灌浆,可以有效防止裂隙的进一步发展和雨水的渗漏,使遗址得以更好地保存。为比选出适宜于潮湿环境下窑址裂隙充填灌浆材料,采用烧料礓石、烧阿嘎土、砺灰三种传统石灰材料分别对浙江和福建四处"海上丝绸之路"遗址点的遗址土进行改性研究。测试改性后浆体材料不同龄期的抗压、抗折强度、收缩率,以及温湿度循环、冻融循环、水稳定性、安定性、耐碱性试验后试样的力学性能变化。试验结果表明,三种石灰类材料均具有良好的耐候性,但砺灰试样的耐冻融特性稍差、龄期强度低、收缩变形较大。烧料礓石改性试样具有较高的龄期强度、较低的收缩率、良好的耐候性。因此,建议将烧料礓石作为主剂应用于四处窑址的灌浆材料中。相关研究成果对窑址裂隙灌浆材料的选取具有实际指导意义。

Laboratory study on potential grouting materials for crack filling in kilns of the Maritime Silk Road

Crack filling can effectively prevent further development of cracks and leakage of rainwater, enabling kiln sites to be better preserved. In order to select suitable grouting materials for crack filling in kilns with moisture problems, we conducted a study on modification of soils from four sites on the Maritime Silk Road in Zhejiang and Fujian provinces. We used calcined ginger nuts, calcined Aga soil and oyster ash. We tested compressive strengths, flexural strengths and shrinkage rates of the modified grouting materials at different ages, as well as their changes of mechanical properties before and after temperature and humidity cycle tests, freezing and thawing cycle tests, water stability tests, stability tests and alkali resistance tests. The result shows that all three of the types of lime materials demonstrate good weathering resistance, but the oyster ash-modified samples are characterized by having relatively weaker resistance to freezing and thawing, lower aging strengths and larger shrinkage deformations. In contrast, the samples modified with calcined ginger nuts demonstrate their higher aging strength, smaller shrinkage deformation, as well as resistance to weathering. Therefore, it is suggested that calcined ginger nuts be used in grouting materials for crack filling in these four kiln sites. The related research results have a practical significance in terms of the selection of grouting materials for crack filling.