Special Issue for Preservation Techniques for Grottoes Heritage
Properties of multi-scale fiber reinforced restoration materials for Leshan Giant Buddha
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Abstract:
Mixed hammered ash, with both hydraulic and air hardening properties, was used in restoring Leshan Giant Buddha. To solve the problems of cracking and peeling in the Buddha’s head and face caused by environmental factors, hemp fiber (HF) and calcium carbonate whisker fiber (CWF) were added to enhance the material. Results show that HF outperforms CWF in improving flexural strength, while adding CWF effectively enhances toughness and tensile strength. The combination of the two achieves a comprehensive strengthening effect. After 28 days of curing, composite specimens show a 35.73% increase in flexural strength and 20.88% in tensile strength, outperforming single-doped groups and showing better water and acid resistance. This multi-scale fiber composite method achieves a comprehensive improvement in material strength and weather resistance.
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Supported by the National Key R&D Program of China (2021YFC1523400) and the Special Key Project for Technological Innovation and Application Development in Chongqing(CSTB2022TIAD-KPX0095).
