A new bioslurry-induced restoration method via biomineralization for fragmented ceramic cultural relics  

作　　者：Yang Yang Han Zhang Liang Cheng Lin Ye Yuanjian Liu Jinquan Shi Jianwei Zhang Yang Xiao Hanlong Liu 

机构地区：[1]School of Civil Engineering,Chongqing University,Chongqing 400045,China [2]School of Environment and Safety Engineering,Jiangsu University,Zhenjiang 212013,China [3]Chongqing Cultural Relics&Archaeology Research Institute,Chongqing 400013,China [4]School of Civil and Architectual Engineering,Henan University,Kaifeng 475001,China

出　　处：《Biogeotechnics》2024年第2期13-18,共6页生物岩土技术（英文）

基　　金：supported by the National Natural Science Foundation of China(Grant No.52108300);Entrepreneurship and Innovation Support for Overseas Student,Chongqing,China(Grant No.CX2022007);Research Institutions Performance Incentive and Guidance Project(Grant No.2023JXJL-YFX0078).

摘　　要：This study presents a new restoration method for fragmented ceramic cultural relics using bioslurry-induced biocementation via a microbially induced calcium carbonate precipitation (MICP) process. Bioslurry is highly urease active calcium carbonate crystals, which serve as filling and cementitious material with newly induced calcite precipitation when supplying cementation solution (urea and calcium source). With the pre-filling of bioslurry and newly induced calcite crystals, the fragmented ceramic can be connected and the gap along the fracture surface can be sealed. Due to the high urease active bacteria cells embedded in bioslurry, the ceramic restoration can be completed in 24 h with the optimal concentration of cementation solution of 1.6 M. Taking the advantage of bonding effect gained from newly induced calcite precipitation, the tensile strength was improved up to 0.92 MPa through a customized tensile strength test. This is satisfactory to ensure the stability and integrity of fragmented ceramic after bioslurry-induced restoration. A demonstrative restoration has been completed on fragmented ceramics from Ming Dynasty. With the good bonding strength and high stability of bioslurry-induced calcite precipitation, the proposed bioslurry-induced restoration method contributes valuable insights to the conservation of ceramic cultural relics. Other prospective applications include the restoration of masonry relics and bone relics.

关 键 词：BIOSLURRY Ceramic relics Microbially induced calcium carbonate precipitation(MICP) RESTORATION Tensile strength 

分 类 号：TQ1[化学工程]