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将红砂岩试样在清水中浸泡,测量不同时间点红砂岩的吸水量,运用L型施密特锤测试干燥和各时间点红砂岩表面的施密特硬度,最终测试各试样在崩解初或饱水状态下的抗压强度.分析红砂岩的吸水速率、吸水率随吸水时间的变化趋势,红砂岩表面施密特硬度与吸水时间和吸水率的关系,施密特硬度与抗压强度之间的关系,结果表明:红砂岩在第1h内的吸水量较大,吸水速率随吸水时间延长而下降;红砂岩的施密特硬度随吸水时间和吸水率的增加而降低,当达到饱和吸水率后,随浸水时间延长,施密特硬度继续降低;通过施密特硬度估计的红砂岩抗压强度值比实测值稍微偏大,但能够判断出红砂岩抗压强度的大致范围;施密特硬度与抗压强度之间的关系可以用数学公式表示.
The samples of red sandstone were immersed in clean water to measure the water absorption of red sandstone at different time points. The dryness and the Schmidt hardness of red sandstone at various time points were measured by L type Schmidt hammer. Finally, Initial or saturated state of compressive strength.The red sandstone water absorption rate, water absorption rate changes with the absorption time, red sandstone surface Schmidt hardness and water absorption time and water absorption ratio, Schmidt hardness and compression The results show that the red sandstone has a large amount of water absorption within 1 h, and the water absorption rate decreases with the increase of water absorption time. The Schmidt hardness of red sandstone decreases with the increase of water absorption time and water absorption. After saturated water absorption, the hardness of Schmidt continues to decrease with the prolongation of immersion time. The compressive strength of red sandstone estimated by Schmidt hardness is slightly larger than the measured value, but the approximate range of compressive strength of red sandstone can be judged. The relationship between Schmidt hardness and compressive strength can be expressed mathematically.