通过室内无侧限抗压强度试验,重点探讨了含石量及细粒料比例不同时对其抗压强度的影响。结合XTDIC分析系统得到试样的应变、位移云图,并对其进行定性及定量分析。结果表明:在静荷载作用下,应变增加导致初期应力增长速率加快,峰值应力显著上升,其相邻峰值应力的最大增量可达22.2%,达到峰值后,应变持续增长而应力降低的速率有所减缓,残余应力有所上升;当试样中石粉含量固定而含石量变化时,初期应力的增长速度加快,并导致峰值应力提升;从应力—应变曲线分析可知,含石量为70%,石粉占80%时,试样表现出最佳的力学性能和最小的变形;含石量为30%、石粉占20%时,试样的力学性能表现最差;击实后分形维数对无侧限抗压强度的影响显著,随着击实后分形维数的减小(含石量增加),无侧限抗压强度呈递先增大后减小的趋势。
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