高吸水树脂种类与粒形对高强混凝土自收缩及耐久性的影响

The effect of different types and shapes of superabsorbent polymers on autogenous shrinkage and durability of high-strength concrete

研究了不同种类高吸水树脂(SAP)及其粒形对高性能混凝土力学性能、自收缩及耐久性的影响。实验结果表明,SAP的种类和粒形都会影响其吸水率从而影响混凝土的性能,在相同水胶比的条件下,SAP的掺入能提高混凝土的强度;掺入SAP能有效降低混凝土的自收缩,同时混凝土的抗氯离子侵蚀和抗冻性均有所提升。

The effect of different types and grain shapes of superabsorbent polymers （SAP） on physical properties,autogenous shrinkage and durability of high-strength concrete were investigated. The results show that the types and grain shapes have significant influence on SAP＇s absorption rate which affecting the performance of concrete. The mixed SAP can improve the strength of the concrete with the same water-binder ratio and effectively reduce autogenous shrinkage of concrete. The resistance to chloride ion permeability and frost resistance of concrete can also be improved by adding appropriate amount of SAP.