烧料礓石拌合粉煤灰与石英砂锚固浆液加速老化试验性能研究（英文）

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

作为锚固浆液,烧料礓石拌合粉煤灰与石英砂(CGN-(F+S))混合浆液与土遗址之间具有良好的兼容性.为了进一步探究CGN-(F+S)浆液在加速老化试验后的性能变化,设置了水稳定性试验、温湿循环试验、安定性试验和耐碱性试验等加速老化试验.在加速老化试验后,对锚固浆液试样的密度、表面硬度、渗透系数、表面吸水率、可溶盐含量、扫描电子显微镜(SEM)图像和EDS能谱图进行了测试.结果显示,CGN-(F+S)浆液试样的密度发生了下降,表面硬度、渗透系数及表面吸水率普遍提高.可溶盐分析结果与SEM、EDS图像印证了CGN-(F+S)浆液在加速老化试验后的物理性质变化.综合分析CGN-(F+S)浆液的物理及化学性质变化,结果表明,温湿循环试验后CGN-(F+S)浆液的性能劣化最为严重,其次是水稳定性试验,安定性试验和耐碱性试验.但总的来说,CGN-(F+S)锚固浆液仍具有良好的耐久性.

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.