Surface reinforcing agent for long-age concrete, and preparation method thereof

• Main Authors: HUANG YUMEI, NI TAO, WANG LONGFEI, WANG YONGMEI, WANG YUQIAN, LIU CUIFEN, FENG KE, SONG XIN, LI QIANQIAN, ZHOU HAICHENG, DONG SHUQIANG
• Format: Patent
• Language: Chinese; English
• Published: 13.07.2021
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; LIME, MAGNESIA; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; REFRACTORIES; SLAG; THEIR PREPARATION OR CHEMICAL WORKING-UP; THEIR RELEVANT APPARATUS; TRANSPORTING; TREATMENT OF NATURAL STONE

The invention discloses a surface reinforcing agent for long-age concrete, and a preparation method thereof. The surface reinforcing agent is a microcapsule composed of an internal core layer, a shell and a calcium supplement component, wherein the calcium supplement component is a solution containing Ca<2+>. The preparation method comprises the following steps: slowly pouring 50 mL of a 3-5 mg/L nano SiO2 solution into 50 mL of a 0.3-0.5 mg/L high-water-absorption nano microsphere aqueous solution under rapid stirring, and violently stirring to obtain a high-water-absorption nano microsphere/SiO2 composite solution; and taking 50-100 mL of the high-water-absorption nano-microsphere/SiO2 composite solution, sequentially adding 5-10 mL of a Ca<2+>-containing solution containing 5-8 mg/L of a capsule wall material A and 5-10 mL of a Ca<2+>-containing solution containing 5-8 mg/L of a capsule wall material B, respectively adsorbing under an oscillation condition, centrifuging after adsorption is finished, adding