Composite-type cement concrete curing agent and preparation method thereof

Abstract

The invention relates to a cement concrete curing technology, and discloses a composite-type cement concrete curing agent and a preparation method thereof. The composite-type cement concrete curing agent is characterized by comprising the following components in percentage by mass: 35-45% of water-borne epoxy resin emulsion, 50-60% of an aluminium sulphate-modified sodium silicate solution, 3-6% of a film-forming auxiliary, 1-2.5% of a coupling agent, 0.5-3% of a defoaming agent, and 1-2.5% of a levelling agent. The preparation method comprises the step of effectively compounding the water-borne epoxy resin emulsion with the aluminium sulphate-modified sodium silicate solution to form an organic / inorganic double-component system, so that the prepared curing agent has the excellent film-forming property of the organic component, and the high permeability and chemical activity of the inorganic component, and is sprayed on the surface of cement concrete to form a compact curing film, thus greatly reducing the evaporation of water on the surface of cement concrete, and achieving the purpose of efficient water retention.

Description

technical field [0001] 本发明涉及水泥混凝土养护技术,特别是涉及一种复合型水泥混凝土养护剂及其制备方法。 Background technique [0002] 炎热干旱地区,水泥混凝土浇筑后如果不及时对其进行养护或养护不当,其表面水分极易过快蒸发,直接导致水泥颗粒不能充分水化和转化为稳定的结晶,最终因粘结力不足而产生水泥混凝土表面脱落破坏现象。此外,在水泥混凝土尚未具备足够强度时,水分过早的蒸发还会产生较大的收缩变形,出现干缩裂纹,影响水泥混凝土的耐久性和整体性。 [0003] 水泥混凝土养护剂是一种喷洒或涂刷于水泥混凝土表面,能在水泥混凝土表面形成一层连续的不透水的密闭养护薄膜的材料。养护剂养护方式相对于传统养护方式(浇水、覆盖湿布及薄膜)而言,具有养护成本低、养护效果好、适用范围广的优点。目前所使用的养护剂按照有效成分的不同,分为无机型与有机型。无机型养护剂主要是以硅酸钠为主的硅酸盐溶液类,其主要原理是利用无机硅酸盐的渗透性及化学反应活性,使其渗透到水泥混凝土表面的毛细孔中,与水泥水化产物反应生成不溶于水的胶体膜,堵塞毛细孔阻止水分蒸发,达到养护目的,但此类养护剂存在着保水率低(通常只有20~35%)、成膜效果差的缺点。有机型养护剂是一类高分子材料,其干燥蒸发后分子聚拢成不透水的薄膜覆盖在水泥混凝土表面,阻止水分蒸发,主要包括树脂类、胶乳类和乳液类;树脂类通常含有挥发性溶剂,污染环境并危害人体健康;胶乳型养护剂存在成本高、养护结束后成膜难以去除,存在影响后续施工的问题;乳液类虽能克服上诉缺点,但也存在着喷涂厚度小、成膜致密性差、单位质量喷涂面积小的问题。 Contents of the invention [0004] 本发明目的在于提供一种高效的复合型水泥混凝土养护剂及其制备方法。本发明将有机组分和无机组分高效复合,并添加一定助剂,使制备的养护剂不仅具有无机型养护剂的渗透性和化学活性,而且具有有机型养护剂的优良成膜性,两者协同效应大大提高了所制备的养护剂的保水率(达到90%以上);另外也降低了成本,具有良好的施工性。 [0005] 为了达到上述目的,本发明采用以下技术方案予以实现。 [0006] Technical solution one: [0007] 一种复合型水泥混凝土养护...

AI Technical Summary

Problems solved by technology

Inorganic curing agents are mainly silicate solutions based on sodium silicate. The main principle is to use the permeability and chemical reactivity of inorganic silicate to penetrate into the capillary pores on the surface of cement concrete. The cement hydration product reacts to form a water-insoluble colloidal film, which blocks the capillary pores to prevent water evaporation and achieves the purpose of curing. However, this type of curing agent has the disadvantages of low water retention rate (usually only 20-35%) and poor film-forming effect

Organic type curing agent is a kind of polymer material. After drying and evaporating, its molecules gather into an impermeable film to cover the surface of cement concrete to prevent water evaporation. It mainly includes resins, latexes and emulsions; resins usually contain volatile Solvents pollute the environment and endanger human health; latex-type curing agents have high costs and are difficult to remove after curing, which affects subsequent construction; although emulsions can overcome the shortcomings of the appeal, they also have the disadvantages of small spraying thickness and poor film formation. Problems of poor compactness and small spraying area per unit mass

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