Hybrid fiber reinforced cement-based composite material and preparation method thereof: Fid-Bau Portal

Hybrid fiber reinforced cement-based composite material and preparation method thereof

WANG CHUNSHENG / DUAN LAN / ZHANG YANG

The invention discloses a hybrid fiber reinforced cement-based composite material for bridge construction and a preparation method thereof. The hybrid fiber reinforced cement-based composite material comprises cement, silica fume, standard sand or river sand, a water reducing agent component A, a water reducing agent component B, copolyformaldehyde fibers, steel fibers and water. The preparation method comprises the following steps: firstly, dry-mixing the cement, the silica fume, the river sand, the microbead powder and the polyformaldehyde fiber to a uniform state; then sequentially adding one half of the water reducing agent and one half of the water, and continuously stirring the one half of the water reducing agent and one half of the water; and adding the steel fiber, continuously stirring until the mixture is uniformly mixed and has good fluidity, and discharging. The hybrid fiber reinforced cement-based composite material disclosed by the invention has the advantages of high strength, ultrahigh toughness, economy, environmental protection and the like, and is suitable for newly-built cement-based material bridge structures, steel-concrete composite structure bridge structures and widening and reinforcing of various bridge structures.

本发明公开一种用于桥梁建设的混杂纤维增强水泥基复合材料及其制备方法，材料包括：水泥、硅灰、标准砂或河砂、减水剂A组份、减水剂B组份、共聚甲醛纤维、钢纤维、水。制备方法包括以下步骤：首先干拌水泥、硅灰、河砂、微珠粉及共聚甲醛纤维至均匀状态；然后依次加入二分之一减水剂、二分之一水、二分之一减水剂、二分之一水继续搅拌；加入钢纤维继续搅拌至拌合物混合均匀且流动性较好即可出料。本发明公开的混杂纤维增强水泥基复合材料具有高强、超高韧性、经济、环保等优点，适用于新建水泥基材料桥梁结构、钢‑混组合结构桥梁结构，以及各桥梁结构的拓宽、加固。

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