Super-retardation concrete and preparing method thereof

The invention relates to the technical field of building materials, in particular to a super-retardation concrete and a preparing method thereof. The super-retardation concrete is prepared from, by weight, 175-200 parts of cement, 63-70 parts of a fly ash activate admixture, 62-70 parts of mineral powder, 685-770 parts of sand, 916-1030 parts of broken stones, 160-180 parts of water, 5-6 parts ofa retarder and 3-4 parts of a retardation efficient polycarboxylate water reducer. The prepared super-retardation concrete not only can effectively retard the setting time but also has excellent latercompressive strength, penetrating resistance, durability and comprehensive performance. 本发明涉及建筑材料技术领域，具体公开了一种超缓凝混凝土及其制备方法，其是由以下组分按重量份制成：水泥175～200份、粉煤灰活性掺和料63～70份、矿粉62～70份、砂子685～770份、碎石916～1030份、水160～180份、缓凝剂5～6份、缓凝型高效聚羧酸减水剂3～4份。本发明制备的超缓凝混凝土既能有效延缓凝结时间，而且具有优良的后期抗压强度、抗渗性以及耐久性，综合性能优越。