Double-component concrete surface enhancer, and preparation and application method thereof

Abstract

The invention relates to a double-component concrete surface enhancer, and a preparation and application method thereof. The double-component concrete surface enhancer provided by the invention is composed of a reinforcing agent A and a reactant B (water-based), wherein the reinforcing agent A is a 10-60 wt% calcium nitrate water solution, and the reactant B is a 5-10 wt% water solution of aluminum sulfate, potassium carbonate, sodium silicate or magnesium fluosilicate. The application method comprises the following steps: applying the reinforcing agent A onto the concrete surface, drying, and applying the reactant B. The double-component concrete surface enhancer capable of chemical reaction can generate chemical reaction in the permeable concrete surface region, and the generated reaction product has the effects of filling, compaction, enhancement and plugging and can obviously enhance the surface strength of the hardened concrete; and the double-component concrete surface enhancer also has obvious enhancement effects on long-age concrete.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a two-component concrete surface enhancer and its preparation and use method. Background technique [0002] Compared with the concrete interior, the surface concrete is in a more disadvantageous position during the preparation process and after molding. In the process of concrete preparation, the "wall effect" of the formwork-concrete interface and the bleeding of the upper surface of the concrete cause local high sand ratio, high lime-sand ratio and local high water-cement ratio; the release agent on the formwork often makes the cement on the concrete surface Hydration is hindered. After the concrete is formed, when the concrete is in a dry environment and the curing is insufficient, the surface water loss will cause insufficient curing and insufficient cement hydration; the concrete surface will be acidified and corroded due to contact with acid gases such as sulf...

AI Technical Summary

Problems solved by technology

[0003] In response to the above problems, domestic research and patents on concrete surface strengthening agents have been carried out, such as "a surface strengthening sealant for cement concrete" (application number CN03116794), "concrete surface liquid hardener and its construction method" (application number CN201110423161), "A Concrete Hardener and Its Preparation Method" (Application No. CN201210318027), etc. The concrete surface enhancement methods used in these patents all use salts that can react with cement hydration products as the main component, supplemented by For organic additives with effects such as wetting and sealing, the declared enhancer product is a single compound solution of different combinations of components, and the method of using two different solutions in batches is not proposed

[0004] And "two-component water-based ground hardener and its construction method" (application number CN200910055825) proposed a method of using two components in batches, but the concrete surface hardening technology proposed by this patent also uses these two components to be mixed with The effect of concrete hydration products is enhanced. The patent does not propose the interaction between the two components, nor does it purposely design the technical design for the chemical reaction between the two components, and then use this method to achieve the purpose of enhancement. Make full use of the technical advantages of two-component batch use of enhancers