A kind of surface enhancer used for longer age concrete and its preparation method

Abstract

A surface strengthening agent for relatively old concrete and a preparation method thereof, the surface strengthening agent is a microcapsule composed of an inner core layer, an outer shell and a calcium supplement component; wherein the calcium supplement component is composed of Ca 2+ The solution. Preparation method: 50mL content of 3-5mg / L nano-SiO 2 Under rapid stirring, the solution was slowly poured into 50mL 0.3-0.5mg / L superabsorbent nanosphere aqueous solution, and after vigorous stirring, the superabsorbent nanosphere / SiO 2 Composite solution; take 50‑100mL superabsorbent nanospheres / SiO 2 Composite solution, sequentially add 5-10mL of Ca containing 5-8mg / L capsule wall material A 2+ Solution and 5-10mL containing 5-8mg / L capsule wall material B containing Ca 2+ The solution is adsorbed separately under shaking conditions. After the adsorption is completed, it is centrifuged, washed several times with water, and then assembled to form a microcapsule composed of an inner core layer, an outer shell, and a calcium supplement. The invention improves the compactness of the concrete, and further improves the surface strength of the concrete.

Description

technical field [0001] The invention relates to a concrete surface enhancer, in particular to a surface enhancer for relatively old concrete. The invention also relates to a method for the preparation of said surface enhancer for longer age concrete. Background technique [0002] In the actual construction process of concrete engineering, the type of cement, the amount of admixtures that are too high, the water-cement ratio of concrete, and even the construction personnel adding too much water and water reducing agent in the process of pouring concrete will affect the quality of concrete and cause concrete The surface is powdered and sanded, which makes the surface strength of the concrete low. Surface treatment of concrete is a method that can effectively improve the durability and service life of concrete. Its main principle of action is to generate C-S-H gel, AFT, macromolecular compounds, etc. The filler is used to block microscopic defects and pores on the concrete s...

AI Technical Summary

Problems solved by technology

[0004] The above technologies have not given specific guidance on how to use concrete surface enhancers to improve the compactness of concrete, thereby improving the surface strength of concrete.

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