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对于预应力混凝土构件所用的钢绞线。施工单位必须认真按施工规范的要求截取试样,在拉力机上做最大拉力试验。由于1860MPa 级钢绞线强度高、表面光滑,一般拉力试验机的普通夹具无法夹持,从而使试验难以完成。因此,我们进行了反复研究和试验,采取用铝皮加黄油、粗砂包裹钢绞线夹持试验以及
For steel strands used in prestressed concrete structures. The construction unit must carefully intercept the sample according to the requirements of the construction specification and perform the maximum tensile test on the tensile machine. Due to the high strength and smooth surface of 1860MPa steel strands, the general fixtures of the tensile testing machine cannot be clamped, making it difficult to complete the test. Therefore, we carried out repeated studies and experiments and adopted aluminum-skinned butter, coarse sand wrapped steel wire clamping tests and