混合聚合物改性剂溶液对透水混凝土性能影响的试验研究

EXPERIMENTAL STUDY ON EFFECT OF MIXED POLYMER MODIFIER SOLUTION ON PERFORMANCE OF PERMEABLE CONCRETE

羟丙基甲基纤维素(HPMC)可显著提高透水混凝土的透水性,可再分散乳胶粉(VAE)能显著提高透水混凝土的抗压强度。研究聚合物改性剂浓度对粘度的关系,测试这2种聚合物混合溶液粘度变化对透水混凝土力学性能及透水性能的影响规律,结果表明,改性剂溶液粘度随浓度上升而增大,并呈现非线性变化;当HPMC混合溶液粘度为75.52mPa·s且VAE混合溶液粘度为79.57mPa·s时,配置混合溶液对改性透水混凝土性能改善效果最佳,对透水混凝土的力学以及透水性能有明显的提高作用。

Hydroxypropyl methylcellulose(HPMC)can significantly improve the water permeability of permeable concrete and dispersible polymer powder(VAE)can significantly improve the compressive strength of permeable concrete.In this experiment,the relationship between the concentration of polymer modifier and viscosity was studied firstly,and the influence of the viscosity change of the two polymer mixed solutions on the mechanical properties and water permeability of the permeable concrete was further tested.The test results show that the viscosity of the modifier solution increases with the increase of concentration and exhibits a nonlinear change.When the viscosity of the HPMC mixed solution is 75.52 mPa·s and the viscosity of the VAE mixed solution is 79.57 mPa·s,the mixed solution is modified to permeate.The best performance improvement of concrete performance has a significant improvement on the mechanics and water permeability of permeable concrete.