Fatigue Characteristics of Large Dosage CFB Ash-Based Foamed Lightweight Soil
Using the circulating fluidized bed ash(CFB ash)to modify the foamed lightweight soil in a large dosage can realize a win-win situation of improving the performance of foamed lightweight soil and reducing the construction cost.Based on the CFB ash produced by Shanxi Guofeng Coal-burning Power Plant,the fatigue characteristics of the large dosage CFB ash-based foamed lightweight soil were studied via the four-point bending fatigue test according to previous studies.The results showed that the stress ratio was a significant factor affecting the fatigue characteristics,with a negative correlation;the fatigue life results obeyed a Weibull distribution with a large dispersion,and the dispersion was more pronounced as the stress ratio increased;compared with the conventional cement-based foamed lightweight soil,adding CFB ash could prolong the fatigue life and improve fatigue properties of foamed lightweight soil.
万方数据
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