混凝土 静力受压弹模:
仪器精度0.001mm,先测3个抗压强度,加荷至0.5MPa保持60s,读数30s(初试变形),加载到1/3轴心抗压强度,停60s,读数30s,(变形)(两侧值差>20%均值,调整)卸荷至0.5MPa,60s,加荷到1/3轴心抗压强度,两次预压。在0.5MPa停60s,30s读数,加载1/3处,60s,读30s,卸仪器,加压到破坏。破坏值差过20%,报告注明,计算:弹模=(1/3力-0.5MPa)/截面积×标距/两侧变形均值差。弹模取均值,有一抗压超过20%控制载荷,取其它2平均,否则无效。