金川水电站面板混凝土早期开裂试验研究

Research on Early Cracking of Face Slab Concrete for Jinchuan Hydropower Station

通过平板法试验,研究了采用人工中砂、人工粗砂、天然砂,以及掺入聚丙烯纤维时,对混凝土早期开裂的影响。试验结果表明,采用天然砂代替人工砂或在人工砂中掺入聚丙烯纤维,均可以有效抑制混凝土早期裂缝的产生,提高混凝土抵抗早期开裂的能力。

The effects of manufactured middle sand, manufactured coarse sand, natural sand and polypropylene fiber on early cracking of face slab concrete are studied through slab tests. The results show that using natural sand instead of manufactured sand or adding polypropylene fiber in manufactured sand can all effectively inhibit the emergence of early cracks and increase the ability of concrete to resist early cracking.