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Property changes of anchor grout calcined ginger nuts admixed with fly ash and quartz sand after accelerated ageing tests

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Journal of Central South University 2019年第11期26卷 3114-3125页

作者： ZHANG Jing-ke ZHANG Li-xiang ZHAO Lin-yi LIU Dun GUO Qing-lin PEI Qiang-qiang School of Civil Engineering and Mechanics Lanzhou UniversityLanzhou 730000China Key Laboratory of Mechanics on Disaster and Environment in Western China Ministry of EducationLanzhou 730000China National Research Center for Conservation of Ancient Wall Paintings and Earthen Sites Dunhuang AcademyDunhuang 736200China

Calcined ginger nuts admixed by fly ash and quartz sand (CGN-(F+S)) has been validated to be basically compatible to earthen sites as an anchor grout. accelerated ageing tests including water stability test, temperature and humidity cycling test, soundness test and alkali resistance test are conducted with the objective to further research the property changes of CGN-(F+S) grout. Density, surface hardness, water penetration capacity, water permeability capacity, soluble salt, scanning electron microscopy (SEM) images and energy dispersive spectrometry (EDS) spectrum of these samples have been tested after accelerated ageing tests. The results show that densities of samples decrease, surface hardness, water penetration capacity and water permeability capacity of samples increase generally. Besides, soluble salt analysis, SEM and EDS results well corroborate the changes. Based on the results it can be concluded that property changes are most serious after temperature and humidity cycling test, followed by water stability, soundness and alkali resistance test in sequence. But in general, CGN-(F+S) still has good durability.

关键词： CGN-(F+S) grout accelerated ageing tests physical property change chemical property change scanning electron microscopy energy dispersive spectrometry

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