Considering the influence of the replacement ratio of recycled coarse aggregate and the volume ratio of polypropylene fiber,the rapid carbonization of recycled concrete and the capillary absorption of carbonated concrete were studied.The results show that the carbonation depth of concrete increases with the increase of the replacement rate of recycled coarse aggregate,decreases first and then increases with the increase of the volume rate of polypropylene fiber,and the carbonation depth of recycled concrete decreases with the increase of the fiber content.The capillary water absorption coefficient of recycled concrete decreases first and then increases with the increase of carbonation degree,increases with the increase of the replacement rate of recycled coarse aggregate and decreases first and then increases with the increase of the volume rate of polypropylene fiber.The effect of carbonation on the initial water absorption coefficient of recycled concrete is greater than that of the later,and the bigger the porosity of concrete is,the more significant the effect of carbonation on the initial water absorption coefficient is.Finally,a prediction model of initial capillary water absorption coefficient of recycled concrete considering the effect of carbonation is established.
关键词
再生混凝土/毛细吸水系数/碳化/再生骨料取代率/聚丙烯纤维
Key words
recycled concrete/capillary water absorption coefficient/carbonization/replacement rate of recycled aggregate/polyprop-ylene fiber
维普
万方数据