(1. Key Laboratory of Mechanics on Disaster and Environment in Western China，Ministry of Education，School of Civil Engineering and Mechanics，Lanzhou University，Lanzhou，Gansu 730000，China；2. National Research Center for Conservation of Ancient Wall Paintings and Earthen Sites，Dunhuang Academy，Dunhuang，Gansu 736200，China)
Abstract： In order to explore the suitable materials of filling the fissures of earthen sites，The calcined ginger nuts and the soil from the earthen site were selected as the main materials of grout. Three different types of proportions and water-cement ratios were determined based on the mechanical experiments of earthen sites and the fluidity tests on slurry. Considering about the actual working conditions，the grout concretion was buried outside and then its physical and mechanical properties during the different curing age were measured，and simultaneously，its microstructure was observed. The basic physical properties of concretion were influenced significantly by the moisture content of grout in the first three days，then changed linearly from the third to the eighth days before transition phase from the eighth to the eighteenth days，and finally remained stable after eighteen days. The shrinkage rate，wave velocity，porosity，flexural strength and compressive strength of concretion increased with the growth of the content of calcined ginger nuts，while the density and the permeability coefficient showed an opposite trend. During the hardening process，the hydration reaction contributed to the improvement of the strength quickly at the early period. At the later period，the carbonation reaction lasted for a long time with its physical properties remained stable. The results of SEM pictures revealed the existence of calcium deposition between the soil particles as the binders and the EDS analysis showed that the content of calcium element and carbon element grew with the increase of the content of calcined ginger nuts. The results in this research prove preliminarily that soil from the earthen sites modified with the calcined ginger nuts is suitable for grouting the fissures in earthen sites.
张景科1，2，王 南1，樊 孟1，任晓茹1，李最雄2，赵林毅2. 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 Jingke1，2，WANG Nan1，FAN Meng1，REN Xiaoru1，LI Zuixiong2，ZHAO Linyi2. Experimental study on age properties of fissure grouting material composed of calcined ginger nuts and earthen site soil#br#. , 2018, 37(1): 220-229.
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2018, Vol. 37 
