粒化高炉矿渣高强水泥基材料盐冻与自愈性能试验研究

为研究两种水胶比粒化高炉矿渣高强水泥基材料的盐冻与自愈性能,利用快速冻融法进行盐冻与自愈试验。结果表明,经过500次盐冻循环后,粒化高炉矿渣高强水泥基材料的总体抗压强度下降率与普通石英砂高强水泥基材料类似;盐冻循环后经过适当养护,粒化高炉矿渣高强水泥基材料和普通石英砂高强水泥基材料的抗压强度均有提高。扫描电镜(SEM)及硬化混凝土气孔结构测定仪测试结果表明,不同冻融循环下的含气量均表明粒化高炉矿渣高强水泥基材料有一定的自愈能力。

Experiment Study on Salt Freezing and Self-healing Properties of Granulated Blast Furnace Slag High Strength Cement-based Materials

The salt freezing and self-healing properties of granulated blast furnace slag high strength cement-based materials of two kinds of water-binder ratio were studied by the salt-freezing and self-healing tests.The results show that after 500 times of salt-freezing cycles,the overall compressive strength drop rate of granulated blast furnace slag high strength cement-based materials is similar to that of quartz sand high strength cement-based materials.By moderate curing after salt-freezing cycles,the compressive strength of granulated blast furnace slag high strength cement-based materials and quartz sand high strength cement-based materials is increased.The result of scanning electron microscopy(SEM)and the stomatal structure tester for hardened concrete show that the gas content under different freeze-thaw cycles indicates that the granulated blast furnace slag high strength cement-based materials has self-healing capability.