摘要
在不同水胶比和不同养护条件下,就聚丙烯纤维对海工混凝土抗氯离子渗透能力的影响进行了试验研究。结果表明,在标准养护条件下,随着聚丙烯纤维掺量的增加对水胶比为0.30、0.40和0.50的混凝土均产生了氯离子迁移电量增加的现象,增加幅度随水胶比增加而明显增大。在标准养护28 d再沸煮8 h的条件下,沸煮后同类混凝土的氯离子迁移电量普遍均低于仅标养28 d的迁移电量,在水胶比较大(0.50)的条件下,混凝土氯离子迁移电量随聚丙烯纤维掺量增加而增加的势头经沸煮后有所减弱。水胶比为0.30、0.40和0.50时,掺聚丙烯纤维海工混凝土早期的抗氯离子渗透能力均远小于28 d龄期的抗氯离子渗透能力,其规律不同于龄期与强度的规律。
Experimental study was made on effect of polypropylene （PP） fiber on chlorine anion penetration resistance of marine concrete under different water-binder ratio and curing conditions. The result showed that under normal curing condition quantity of chlorine anion mobility of concrete with water-binder ratio of 0.30, 0.40 and 0.50 were increased with PP fiber increasing, and increment became obviously great with increasing of water-binder ratio. Under normal curing condition for 28 days and then curing for 8 hours in boiling, the quantity of chlorine anion mobility of same kind concrete was lower than that of only curing under normal condition for 28 days, increment of chlorine anion mobility of concrete with water-binder ratio of 0.50 with increasing of PP fiber was somewhat reduced after boiled. When water-binder ratio was 0.30, 0.40 and 0.50 the early stage chlorine anion penetration resistance of marine concrete added with PP fiber was much less than that at age of 28 d. The variation of chlorine anion penetration resistance with time was not the same as that of age and strength with time.
出处
《新型建筑材料》
北大核心
2007年第2期1-4,共4页
New Building Materials
关键词
抗氯离子渗透
聚丙烯纤维
海工混凝土
早期性能
养护
chlorine anion penetration resistance
polypropylene fiber
marine concrete： early stage property
curing
