低热微膨胀水泥混凝土在宝珠寺水电站中的应用

Application of Low-heat and Micro-expanding Cement in Concrete at Baozhusi Hydropower Station

低热微膨胀水泥混凝土是一种补偿收缩混凝土。为摸索施工经验，先在坝段间三角体坝段试浇并测定其内部温度和开合度。证实其性能可靠后，在中孔坝段缺口处采用长浇筑块，连续浇筑不分层。缩短了工期，节省了并缝灌浆时间，取得了明显的效益。

Concrete with low-heat and micro-expanding cement is a compensating contraction concrete. In order to try to gain experiences,concrete placement was conducted in triangle block between blocks,then the internal temperature and open-closed degree were measured. After the behaviour had been proved reliabte,continuous placing in a long block without lift were carried out at notch in block with middle level outlet. By this way,construction period is shortened. Time for contraction-joint grouting is saved and bent fits are obviously gained.