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通过正弦式应变计自动采集单元对某地下室空白及掺氧化钙-硫铝酸钙系双膨胀源高性能膨胀剂C60高强混凝土外墙膨胀及收缩性能进行了长期监测,结果表明:在C60高强混凝土中氧化钙-硫铝酸钙系双膨胀源高性能膨胀剂仍能充分发挥膨胀作用,在混凝土早期能够较好地补偿混凝土的早期收缩,后期收缩值也明显小于空白组,长期体积稳定性能好,且掺膨胀剂段外墙开裂情况明显好于空白段,膨胀剂在夏季施工高强混凝土中具有显著地补偿收缩,抑制混凝土开裂的作用。
Long-term monitoring of expansion and shrinkage of C60 high strength concrete expansive expansive and high shrinkage concrete expanders by a sine-type strain gage automatic acquisition unit has been carried out on a basement blank and a calcium-calcium-sulphoaluminate double expansion source high-performance expansive agent. The results show that in C60 high-strength concrete Calcium-calcium sulphoaluminate double-expansive high-performance expansive agent can still give full play to the expansion effect, early concrete can better compensate for early shrinkage of concrete, the late shrinkage value was also significantly less than the blank group, long-term volume stability , And the external wall expansion of expansive agent is obviously better than that of the blank. The expansive agent can remarkably compensate the shrinkage and inhibit the cracking of concrete in the construction of high-strength concrete in summer.