Preparation method of super-retarded concrete

• Main Authors: LYU CHAOYANG, CHEN WENXUAN, LI XIAOTING, YOU BAI, YUAN TING, SHEN LEI, MENG HUICHENG, TANG YUNDAN
• Format: Patent
• Language: Chinese; English
• Published: 05.04.2024
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; LIME, MAGNESIA; METALLURGY; REFRACTORIES; SLAG; TREATMENT OF NATURAL STONE

The invention provides a preparation method of super-retarded concrete. Adding the coarse aggregate and the fine aggregate into a stirrer, and stirring for 30 seconds; adding Portland cement and fly ash, and stirring for 30s; adding water, a polycarboxylic acid water reducing agent and a glue reducing agent, stirring for 60 seconds, and standing for 1 hour; and adding the reinforcing-retarding particles, and stirring for 60 seconds to obtain the super-retarding concrete. The reinforcing-retarding particles are adopted, so that the retarding effect on the concrete is achieved, and meanwhile, the effect of enhancing the mechanical property of the concrete is also achieved. The reinforcing-retarding particles are formed by grafting pyrophyllite with a super absorbent material, the super absorbent material has a large number of hydroxyl groups and carboxyl groups, and the carboxyl groups react with free Ca < 2 + > in an alkaline environment of hydration of Portland cement to generate an unstable complex, so that