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    • 5. 发明申请
    • CONCRETE COMPOSITION WITH VERY LOW SHRINKAGE
    • 混凝土组合物具有非常低的收缩率
    • WO2016185264A1
    • 2016-11-24
    • PCT/IB2016/000636
    • 2016-05-12
    • HOLCIM TECHNOLOGY LTD.
    • BAALBAKI, MoussaGONG, Bill (Chunming)BABAYAN, DavidMATTHES, Winnie
    • C04B28/02C04B28/04C04B111/34
    • C04B28/02C04B28/04C04B40/0042C04B2111/346C04B14/06C04B22/064C04B24/02
    • Concrete composition of very low-shrinkage comprising - water/cement ratio 0,1-0,5, - 280-700 kg/ m3 hydraulic binder comprising ordinary Portland cement and optionally supplementary cementitious material - sand, - aggregates, - an expanding agent, CaO calcium oxide having a low reactivity such that the concrete does not expand by more than 0,05 vol% during the first 10 days after having been casted, being present in an amount of 2-6 wt.-% of the hydraulic binder. - a shrinkage reducing admixture being an organic admixture, in particular based on polypropylene glycol, polyethylene glycol and/or a glycol ether derivative, preferably in a liquid mixture with surfactants; present in an amount of 1-2 wt.-% of the hydraulic binder. - a water reducing agent, in particular a polycarboxylate ether based or a polynaphthalene sulfonate based plasticizing admixture, being present in an amount of 20-60 ml/100 kg hydraulic binder. The calcium oxide has - a particle size distribution characterized by a residue of at least 6 wt % on a 45 um mesh sieve, and/or - a reactivity that is characterized by a conductivity of
    • 具有非常低收缩率的混凝土组合物,其包含 - 水/水泥比0,1-0,5, - 280-700kg / m3水硬性粘合剂,其包含普通硅酸盐水泥和任选的补充水泥材料 - 砂, - 聚集体, - 膨胀剂, CaO氧化钙具有低反应性,使得混凝土在铸造后的前10天内不膨胀超过0.05体积%,以水硬性粘合剂的2-6重量%的量存在。 - 减缩混合物是有机混合物,特别是基于聚丙二醇,聚乙二醇和/或二醇醚衍生物,优选与表面活性剂的液体混合物; 存在量为1-2重量%的水硬性粘合剂。 - 减水剂,特别是聚羧酸酯醚基或聚萘磺酸盐基增塑混合物,其量为20-60ml / 100kg水硬性粘合剂。 氧化钙具有特征在于在45μm筛网上具有至少6重量%的残余物的粒度分布,和/或 - 当溶于水时其电导率<11mS / cm的反应性,以及 /或 - 反应性,其特征在于在将氧化钙加入水中之后的前15分钟内平均升温<0.5℃/分钟,和/或以温度升高为特征的反应性 在将氧化钙加入水中的前5分钟内<10℃。