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| Research on the properties of grouting bonding materials for cracking of roof rock mass of the flat top cave of North Grottoes |
| LIU Hong1，2，3，PEI Qiangqiang1，2，3，4，GUO Qinglin1，2，3，4，BAI Yushu4，ZHANG Bo1，2，3，SHAO Mingshen5 |
(1. Dunhuang Academy，Dunhuang，Gansu 736200，China；2. Research Center for Conservation of Cultural Relics of Dunhuang，Dunhuang，Gansu 736200，China；3. National Research Center for Conservation of Ancient Wall Paintings and Earthern Sites，Dunhuang，Gansu 736200，China；4. School of Civil Engineering，Lanzhou University of Technology，Lanzhou，
Gansu 730050，China；5. Chinese Academy of Cultural Heritage，Beijing 100029，China) |
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Abstract The flat top cave is one of the most typical cave shapes of the North Grottoes. The interface strength of the sedimentary layer on the top of the flat top cave is low and easy to weather and crack. In order to effectively improve the effect of grouting bonding and reinforcement for roof cracking diseases，sintered stone and sandstone powder were selected as the main materials，mixed with different concentrations of organosilicon-modified acrylic acid solution and different contents of glass microbeads to configure the slurry to test its flow properties，basic physical mechanics indexes，micromorphology and adhesive properties. It is found that the wave speed，flexural resistance，compressive resistance and bonding tensile strength are all significantly improved，and the shrinkage rate and density are reduced that the slurry fluidity and pourability met the requirements by adding 0%–1.0% concentration of silicone-acrylic or 0%–0.5% content of glass beads. Microscopic experiments show that the sintered sintered stone generates -CaO•SiO2•nH2O，2CaO•Al2O3•SiO2•nH2O and CaCO3 through hydration and gasification reactions，which improves the strength of the slurry. Changed to a compact lamellar shape，the glass microbeads can be filled in the original larger pores of the slurry，which enhances the continuity of the slurry. The sintered stone and sandstone powder are 1∶1，mixed with 0.5% silicone-acrylicand 0.25% glass microbeads，and the indicators are the best. It has broad application prospects in the grouting bonding of cracks between the roofs of flat top cave in sandstone caves.
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[1] 樊锦诗. 敦煌石窟研究百年回顾与瞻望[J]. 敦煌研究，2000，(2)：40–51.(FAN Jinshi. The archaeology of Dunhuang Caves in the 20th century：A review of the field and its prospects[J]. Dunhuang Research，2000，(2)：40–51.(in Chinese))
[2] 甘肃北石窟寺文物保护研究所. 庆阳北石窟寺内容总录[M]. 北京：文物出版社，2013：11–26.(Gansu Cultural Relics Task Force Qingyang North Grottoes Temple Cultural Administration. Qingyang North grottoes Temple content total record[M]. Beijing：Cultural Relics Publishing House，2013：11–26.(in Chinese))
[3] 满 君，谌文武，孙光吉. 濒危薄型窟顶石窟加固新技术的应用研究[J]. 敦煌研究，2009，(6)：21–25.(MAN Jun，CHEN Wenwu，SUN Guangji. Study on the new reinforcement measure used for reinforcing folium on the top of grottoes[J]. Dunhuang Research，2009，(6)：21–25.(in Chinese))
[4] 李最雄，易武志. PS-C对砂砾岩石窟岩体裂隙灌浆的研究[J]. 文物保护与考古科学，1989，(2)：19–28.(LI Zuixiong，YI Wuzhi. A study on restoration works of fissured gravel rock-body in grottoes using PS-C grouting[J]. Sciences of Conservation and Archaeology，1989，(2)：19–28.(in Chinese))
[5] 李最雄，张 鲁，王亨通. 砂砾岩石窟岩体裂隙灌浆的进一步研究[J]. 敦煌研究，1993，(3)：79–97.(LI Zuixiong，ZHANG Lu，WANG Hengtong. A further study on restoration work of fissured gravel rock-body in grottoes using PS grouting[J]. Dunhuang Research，1993，(3)：79–97.(in Chinese))
[6] 李最雄，赵林毅，李 黎. 砂砾岩石窟岩体裂隙灌浆新材料研究[J]. 敦煌研究，2011，(6)：59–64.(LI Zuixiong，ZHAO Linyi，LI Li. Gravel rock grotto rock fissure grouting materials research[J]. Dunhuang Research，2011，(6)：59–64.(in Chinese))
[7] 郭青林，王旭东，范宇权，等. 砂砾岩石窟灌浆材料PS-F机制研究[J]. 岩石力学与工程学报，2009，28(增2)：3 330–3 335.(GUO Qinglin，WANG Xudong，FAN Yuquan，et al. Study on mechanism of PS-F grouting material for sandy conglomerate grottoes[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(Supp.2)： 3 330–3 335.(in Chinese))
[8] 赵林毅，王旭东，李 黎，等. 基于仰韶水泥的砂岩石窟裂隙灌浆材料室内筛选研究[J]. 文物保护与考古科学，2016，28(3)：48– 54.(ZHAO Linyi，WANG Xudong，LI Li，et al. The lab selection study on Yangshao concrete grouting materials to treat the cracks of sandstone grottoes[J]. Sciences of Conservation and Archaeology，2016，28(3)：48–54.(in Chinese))
[9] 赵林毅，王旭东，李 黎，等. 基于仰韶水泥的砂岩石窟裂隙灌浆材料物理力学特性研究[J]. 文物保护与考古科学，2018，30(1)：47–52.(ZHAO Linyi，WANG Xudong，LI Li，et al. Study on the physical and mechanical properties of the grouting materials of Yangshao cement applied on the sandstone grottoes cracks[J]. Sciences of Conservation and Archaeology，2018，30(1)：47–52.(in Chinese))
[10] 方 云，刘祥友，胡学军，等. 龙门石窟防渗灌浆试验研究[J]. 石窟寺研究，2010，(1)：23.(FANG Yun，LIU Xiangyou，HU Xuejun，et al. Study on grouting experimental against seepage of the longmen grottoes[J]. Study on the Cave Temples，2010，(1)：23.(in Chinese))
[11] 赵 莽，方 云. 干湿循环条件下龙门石窟防渗灌浆材料耐久性试验研究[J]. 混凝土，2019，(1)：5.(ZHAO Mang，FANG Yun. Experimental study on durability of impervious grout ing material in Longmen Grot toes under dry-wet cycles[J]. Concrete，2019，(1)：5.(in Chinese))
[12] 赵 莽，严绍军，何 凯，等. 龙门石窟裂隙防渗灌浆新材料试验研究[J]. 长江科学院院报，2016，33(6)：115–123.(ZHAO Mang，YAN Shaojun，HE Kai，et al. Experimental study on novel grouting materials for fracture seepage of the Longmen Grottoes[J]. Journal of Yangtze River Scientific Research Institute，2016，33(6)：115–123.(in Chinese))
[13] 严绍军，皮 雷，方 云，等. 龙门石窟偏高岭土–超细水泥复合灌浆材料研究[J]. 石窟寺研究，2013，4：393–404.(YANG Shaojun，PI Lei，FANG Yun，et a1. Research on metakaolin and micro fine cement composite grouting material in Longmen Grottoes[J]. Study on the Cave Temples，2013，4：393–404.(in Chinese))
[14] 刘祥友，翟国林，方 云，等. 龙门石窟岩体裂隙防渗注浆机制及参数分析[J]. 岩石力学与工程学报，2014，33(增2)：3 941–3 947.(LIU Xiangyou，ZHAI Guolin，FANG Yun，et al. Impermeable grouting mechanism and parameter analysis[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(Supp.2)：3 941–3 947.(in Chinese))
[15] 王宏霞，郭君华，高瑞军，等. 新拌烧料礓石浆料的流动性及调控[J]. 中国建材科技，2021，30(6)：51–53.(WANG Hongxia，GUO Junhua，GAO Ruijun，et al. Fluidity and its regulation of calcined ginger nuts slurry[J]. China Building Materials Science and Technology，2021，30(6)：51–53.(in Chinese))
[16] 王如江，任 猛，刘劲松，等. 岩石波速与强度参数的相关性研究[J]. 矿业研究与开发，2021，41(9)：87–91.(WANG Rujiang，REN Meng，LIU Jinsong，et al. Study on correlation between rock wave velocity and strength parameters[J]. Mining Research and Development，2021，41(9)：87–91.(in Chinese))
[17] 李 黎，赵林毅，王金华，等. 我国古代建筑中两种传统硅酸盐材料的物理力学特性研究[J]. 岩石力学与工程学报，2011，30(10)：2 120–2 127.(LI Li，ZHAO Linyi，WANG Jinhua，et al. Research on physical and mechanical characteristics of two traditional silicate materials in Chinese ancient buildings[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(10)：2 120–2 127.(in Chinese))
[18] 张景科，王 南，樊 孟，等. 烧料礓石改性遗址土裂隙注浆材料龄期性能试验研究[J]. 岩石力学与工程学报，2018，37(1)：220– 229.(ZHANG Jingke，WANG Nan，FAN Meng，et al. Experimental study on age properties of fissure grouting material composed of calcined ginger nuts and earthen site soil[J]. Chinese Journal of Rock Mechanics and Engineering，2018，37(1)：220–229.(in Chinese))
[19] EL-TURKI A，BALL R J，ALLEN G C. The influence of relative humidity on structural and chemical changes during carbonation of hydraulic lime[J]. Cement and Concrete Research，2007，37(8)： 1 233–1 240.
[20] 吕 晶，刘晓萌，杜 强. 土遗址修补材料研究进展及其工程应用[J]. 文博，2015，(1)：4.(LV Jing，LIU Xiaomeng，DU Qiang. Research progress and engineering application of repairing materials for earthen ruins[J]. Wenbo，2015，(1)：4.(in Chinese))
[21] 周双林，原思训. 有机硅改性丙烯酸树脂非水分散体的制备及在土 |
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2023, Vol. 42 
