C40自密实混凝土抗渗性研究

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基金项目:

国家自然科学基金重点资助项目(编号:59938170)。

RESEARCH ON THE IMPERMEABILITY OF C40 SELF-COMPACTING CONCRETE

1.
1. Department of Materials Science and Engineering,Southeast University Nanjing 210096;
2.
2. College of Civil Engineering and Mechanics,Yanshan University Qinhuangdao 066004

摘要: 以干缩及变形落差指标并结合抗渗性试验方法，评价自密实混凝土的抗渗性能，系统研究了膨胀剂用量、水胶比、引气剂及养护制度对C40自密实混凝土干缩和抗渗性的影响规律。试验结果表明，收缩及抗渗性能受到水胶比及体系的自密实能力的共同影响，引气剂可以有效减少收缩，提高抗渗性，膨胀剂最佳掺量为30kgm3。
- 自密实 /
- 混凝土 /
- 抗渗性 /
- 干缩
Abstract: It was investigated that the effect of expansive agent dosage,water -binder ratio(W/B),air -entraining admixture and curing regime on the shrinkage and impermeability of C40 self -compacting concrete.The results showed that the airentraining admixture could greatly reduce shrinkage and enhance impermeability,the shrinkage and impermeability were affected by W/B and self -compacting competency,the optimum expanding admixture dosage was 30 kg/m +3.As for the reliability of self-compacting concrete in engineering,the shrinkage and deformation fall acted for a supplement of standard permeability test to estimate the impermeability of self-compacting concrete.
- self-compacting /
- concrete /
- impermeability /
- shrinkage