论文部分内容阅读
对超高韧性水泥基复合材料(UHTCC)进行了快速碳化、预裂后的快速碳化、渗透性、快速氯离子渗透试验及自由氯离子含量测定,研究了不同龄期UHTCC的抗碳化性能和渗透性能。试验结果表明,在无裂缝状态下,UHTCC的抗碳化性能与同强度普通混凝土相当,但在相同荷载预裂后,UHTCC裂缝处的碳化深度仅为对比混凝土的30%~40%;UHTCC抗渗性能优于同强度普通混凝土,且随着龄期增长优势更明显,56天龄期的渗透系数约为对比混凝土的35%;快速氯离子试验和自由氯离子含量测定得到的氯离子渗透系数均表明,UHTCC具有明显优于普通混凝土的抵抗氯离子渗透性能。
The ultra-high toughness cementitious matrix composites (UHTCC) were subjected to rapid carbonation, rapid carbonation after penetration, permeability, fast chloride ion penetration and free chlorine ion content determination. The anti-carbonation and penetration of UHTCC at different ages performance. The test results show that the carbonation resistance of UHTCC is equal to that of ordinary concrete in the condition of no cracks, but the depth of carbonization in UHTCC cracks is only 30% ~ 40% of that of concrete after the same load pre-cracking. The UHTCC impermeability The performance is better than ordinary concrete with the same strength, and the advantage of age is more obvious. The permeability coefficient at 56 days is about 35% of that of the control concrete. The chloride ion permeability coefficient measured by fast chloride test and free chlorine ion content It shows that UHTCC has better resistance to chloride ion permeability than ordinary concrete.