LCPC rock abrasiveness test is gaining popularity for quick estimation of rock and soil abrasiveness in the preliminary site exploration stage of tunneling projects. However, there are parameters such as test propeller hardness and testing time, which may affect the test results thereby influencing the tool wear rate estimates of the tunneling machines employed in those projects. This study evaluates LCPC rock abrasiveness test by using both the standard (grade XC 12; 60-75 HRB) steel and hard cold work tool (54-56 HRC) steel propellers. It is found that the wear in the case of hard steel propellers, ABRh (g/t), is almost 70% less than that in the ABRs (g/t) of standard/soft steel propellers. It is established that 40–60% of the propeller wear occurs during the first 2 min of testing. Moreover, bentonite slurry as a conditioning agent produced promising results in the reduction of ABRh (g/t) values in contrast to the unconditioned test results. The correlation of LCPC test parameters ABRh (g/t) and BRh (%) with the geomechanical rock properties and rock wear indices especially Schimazek’s F value and rock abrasiveness index (RAI) show similar trends to the ones obtained using soft steel propellers in the previous studies. However, breakability BR (%) is found to have no appreciable difference once measured using both the soft and hard steel propellers.

LCPC岩石磨蚀性测试在隧道项目的初步现场勘探阶段中迅速用于评估岩石和土壤磨蚀性正变得越来越流行。但是，有些参数（例如测试螺旋桨硬度和测试时间）可能会影响测试结果，从而影响这些项目中使用的掘进机的工具磨损率估算。这项研究通过使用标准（XC 12级； 60-75 HRB级）钢和硬质冷作工具（54-56 HRC）钢螺旋桨来评估LCPC岩石磨蚀性测试。发现硬钢螺旋桨的磨损量ABRh（g / t）几乎比标准/软钢螺旋桨的ABRs（g / t）少70％。已确定在测试的前2分钟内发生了40-60％的螺旋桨磨损。此外，与未调节的测试结果相比，作为调节剂的膨润土浆料在降低ABRh（g / t）值方面产生了可喜的结果。LCPC测试参数ABRh（g / t）和BRh（％）与岩土力学岩石特性和岩石磨损指数（尤其是Schimazek的F值和岩石磨蚀指数（RAI））的相关性与使用软钢螺旋桨获得的趋势相似。之前的学习。但是，一旦使用软钢和硬钢螺旋桨进行测量，发现断裂性BR（％）都没有明显差异。LCPC测试参数ABRh（g / t）和BRh（％）与岩土力学岩石特性和岩石磨损指数（尤其是Schimazek的F值和岩石磨蚀指数（RAI））的相关性与使用软钢螺旋桨获得的趋势相似。之前的学习。但是，一旦使用软钢和硬钢螺旋桨进行测量，发现断裂性BR（％）都没有明显差异。LCPC测试参数ABRh（g / t）和BRh（％）与岩土力学岩石特性和岩石磨损指数（尤其是Schimazek的F值和岩石磨蚀指数（RAI））的相关性与使用软钢螺旋桨获得的趋势相似。之前的学习。但是，一旦使用软钢和硬钢螺旋桨进行测量，发现断裂性BR（％）都没有明显差异。