在役高强混凝土抗压强度和弹性模量时变特性模拟试验研究

摘要

通过控制碳化时间和冻融循环次数两个作用条件，获得不同模拟服役年限的高强混凝土试件。测定不同模拟服役年限高强混凝土的抗压强度与弹性模量，并拟合出相应的函数关系。通过函数关系分析总结高强混凝土抗压强度和弹性模量的时变特性：高强混凝土在模拟服役过程中，抗压强度和弹性模量遵循先升高后降低的规律，在模拟服役10年左右出现极值。%The high strength concrete specimens with different simulated service life are obtained by controlling the time of carbonation and the cycles of freezing and thawing.The compressive strength and elastic modulus of high strength with different simulated service life concrete were determined,and the corresponding function relation was fitted.The time varying characteristics of the compressive strength and elastic modulus of high strength concrete are analyzed by the function relationship,in the course of the simulation of high strength concrete, the compressive strength and elastic modulus increase first and then decrease.They appear extreme in the simulation of the 10 years or so.