METHOD FOR PREPARING EARLY-STRENGTH LIQUID ACCELERATOR FREE OF ALKALI, CHLORINE, AND FLUORINE

• Main Authors: CHEN, Lei, YUAN, Qiang, TIAN, Yi, YANG, Qian, HU, Chaolong, YU, Zhiwu, TAN, Sui
• Format: Patent
• Language: Chinese; English; French
• Published: 10.05.2024
• 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 present invention provides a method for preparing an early-strength liquid accelerator free of alkali, chlorine, and fluorine. In percentage by mass and on the basis of the sum of the usage amounts of aluminum sulfate, diethanolamine, a pH regulator, a complexing agent, Tween 20, and water, aluminum sulfate accounts for 56%-58%, diethanolamine accounts for 5%-6%, the pH regulator accounts for 0.7%-0.8%, the complexing agent accounts for 1.3%-1.4%, Tween 20 accounts for 0.6%-0.8%, and the remainder is water. The preparation method comprises: after uniformly mixing water, a pH regulator, and a complexing agent, adding the mixture into a reaction kettle, and heating the reaction kettle; adding aluminum sulfate into the reaction kettle, and stirring the mixture until the aluminum sulfate is completely dissolved; adding diethanolamine into the reaction kettle to obtain a premix; and adding tween 20 into the premix to obtain a liquid accelerator. The liquid accelerator prepared in the present invention also ach