混凝土收缩开裂性能控制研究

Study on Control of Shrinkage Cracking of Concrete

随着混凝土技术的不断革新,越来越多的低收缩、高抗裂混凝土在实际工程中得到应用。采用平板试验研究了膨胀剂、减缩剂和聚丙烯纤维对混凝土早期抗裂性能的影响。试验结果表明:减缩剂、膨胀剂和聚丙烯纤维的掺入改善了混凝土早期抗裂性能,而且聚丙烯纤维的改善效果最佳,膨胀剂次之,减缩剂的增强效果最弱。

With the continuous innovation of concrete technology,more and more low shrinkage and high crack resistance concrete are applied in practical engineering.The effect of expansive agent,shrinkage reducing agent and polypropylene fiber on the early crack resistance of concrete is studied by plate test.The test results show that:the addition of shrinkage reducing agent,expansion agent and polypropylene fiber improves the early crack resistance of concrete,and polypropylene fiber has the best improvement effect,followed by expansion agent,and the strengthening effect of shrinkage reducing agent is the weakest.