Concrete reinforcing and toughening agent and preparation method thereof: Fid-Bau Portal

Concrete reinforcing and toughening agent and preparation method thereof

LIN ZEJIAN / LIN YANKUN / LIN FENG

The invention belongs to the technical field of building materials, and discloses a preparation method of a concrete reinforcing and toughening agent. The preparation method comprises the following steps: firstly, uniformly mixing micro-nano fly ash and rosmarinic acid, then adding triisopropanolamine and an amino silane coupling agent, continuously conducting mixing and grinding, combining a silica group on the amino silane coupling agent with a hydroxyl group on the surface of the micro-nano fly ash, and meanwhile, carrying out dehydration condensation reaction on reactive hydrogen on an amino group and the rosmarinic acid, and bonding rosmarinic acid with bonding and toughening effects to the surface of the micro-nano fly ash through chemical bonds to obtain the reinforcing and toughening agent for concrete. The concrete reinforcing and toughening agent is simple in preparation process, the compressive strength, breaking strength and crack resistance of concrete can be remarkably improved, and the product is particularly suitable for low-slump road concrete or pervious concrete.

本发明属于建筑材料技术领域，公开了一种混凝土增强增韧剂的制备方法。本发明首先将微纳米粉煤灰和迷迭香酸混合均匀，然后加入三异丙醇胺和氨基硅烷偶联剂，继续混合并研磨，利用氨基硅烷偶联剂上硅氧基团与微纳米粉煤灰表面的羟基结合，同时利用氨基基团上的活泼氢与迷迭香酸发生脱水缩合反应，通过化学键将具有粘结增韧作用的迷迭香酸结合到微纳米粉煤灰表面上，即得一种混凝土用增强增韧剂。本发明所述的混凝土增强增韧剂制备工艺简单、可显著提升混凝土的抗压强度和抗折强度以及抗裂性能，该产品尤其适用于低坍落度的道路混凝土或透水混凝土。

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