摘要
为保证管片质量的条件下进一步优化地铁盾构管片生产工艺,提高管片生产效率,研究了掺VIVID 早强型聚羧酸减水剂的管片混凝土的水灰比、坍落度、含气量及蒸养时间对管片生产的影响,结果表明:水灰比降低至0.28~0.31,坍落度控制在30~70 mm,可以缩短混凝土静停预蒸养时间至1 h 左右;含气量增加会降低混凝土强度,并影响管片外观质量;管片蒸养时间可由4.5 h 缩短至3.5 h
Apllication of polycarbonate superplasticizer in subway shield segment concrete
FU Le-feng,DENG Zui-liang,LIN Heng,FENG Zhong-jun,ZHENG Bo-cun,YU Jian-guo
(School of Resource and Environmental Engineering,East China University of Science and Technology,Shanghai 200237,China)