• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>International foundations congress and equipment expo >Durability of Lightly Stabilised Granular Material Subjected to Freeze-Thaw and Wet-Dry Cycles
【24h】

Durability of Lightly Stabilised Granular Material Subjected to Freeze-Thaw and Wet-Dry Cycles

机译：轻度稳定的粒状材料在冻融和干湿循环下的耐久性

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This study presents the outcome of an experimental investigation focused on lightly stabilised material's durability under freeze-thaw (f-t) and wet-dry (w-d) conditions. A widely used road base granular base material was selected for the study which was then reconstituted to a particular particle size distribution. A combination of cement and flyash in a ratio of 3:1 was used to stabilise the material with two different binder contents of 1.5% and 3%. Unconfined compressive strength (UCS) of lightly stabilised material subjected to different number of f-t and w-d cycles was evaluated using cylindrical specimens molded at optimum moisture content and cured for 7 days. Strain measurements were taken internally using two extensiometers to calculate the modulus and to observe stress-strain behaviour. The effect of hydration or pozzolanic reaction and its significance in assessing the durability of the stabilised material was also evaluated. Another set of samples cured under normal curing conditions were made to compare with the f-t and w-d samples and to evaluate the degree of degradation with the age. It was found that samples subjected to w-d cycles deteriorated heavily compared with f-t cycles though the increase in binder content helped to deter the adverse w-d effect. Strength gain due to accelerated cementitious reaction was observed in the samples subjected to w-d cycles and the rate of strength gain was found to be dependent on samples' curing days. Samples subjected to f-t cycles also showed increase in strength up to 12 f-t cycles possibly due to the decline in moisture content.
机译：这项研究提出了一项实验研究的结果，该研究的重点是在冻融（f-t）和湿干（w-d）条件下轻稳定材料的耐久性。选择了广泛使用的路基颗粒状基础材料进行研究，然后将其重构为特定的粒度分布。水泥和粉煤灰的比例为3：1的混合物用于稳定材料，其中两种粘合剂含量分别为1.5％和3％。使用在最佳水分含量下模制并固化7天的圆柱形试样评估了经过不同f-t和w-d循环次数的轻稳定材料的无侧限抗压强度（UCS）。使用两个引伸计在内部进行应变测量，以计算模量并观察应力应变行为。还评估了水合或火山灰反应的影响及其在评估稳定材料耐久性方面的意义。制备在正常固化条件下固化的另一组样品，以与f-t和w-d样品进行比较，并评估其随年龄的降解程度。已经发现，经受w-d循环的样品与f-t循环相比严重劣化，尽管粘合剂含量的增加有助于阻止不利的w-d作用。在经历w-d循环的样品中观察到由于加速的胶结反应而导致的强度增加，并且发现强度增加的速率取决于样品的固化天数。经过f-t循环的样品也显示出强度提高，直至12 f-t循环，这可能是由于水分含量下降所致。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号