产品介绍
(1)水泥,冬期施工中应优先选用硅酸盐水泥或普通硅酸盐水泥,水泥强度等级不低于
32.5级。小的水泥用量不应少于300kg/m,水灰比不应大于0.6。使用其他品种水泥时,
应注意其中掺合料对隧道沟盖板混凝土抗冻、抗渗等性能的影响。掺防冻剂的混凝土,严
禁使用高铝水泥。
) Cement, Portland cement or ordinary portland cement shall be preferred in
winter construction, and the cement strength grade shall not be lower than
32.5. The minimum cement consumption shall not be less than 300kg / m, and the
water cement ratio shall not be greater than 0.6. When using other kinds of
cement, attention should be paid to the influence of admixtures on the frost
resistance and impermeability of tunnel trench cover concrete. High alumina
cement shall not be used for concrete mixed with antifreeze.
(2)隧道沟盖板模具混凝土骨料。冬期施工中,隧道沟盖板混凝土骨料清洁,不得含
有冰、雪等冻结物及易冻裂的矿物质。在掺有钾、钠离子防冻剂的混凝土中,骨料中不应
混有活性骨料。