▎ 摘　　要

NOVELTY - Liquid type alkali-free rapid-setting admixture comprises 60-80 wt.% modified polyaluminum sulfate solution, 1-3 wt.% graphene oxide, 1-5 wt.% stabilizer, 1-5 wt.% performance modifier and water (remaining), where the modified polyaluminum sulfate solution comprises 45-60 wt.% polymerized aluminum sulfate, 5-15wt.% diethanolamine and 30-45 wt.% water, and prepared by mixing polymerize aluminum sulfate, diethanolamine and water and stirring at room temperature for 1 hour. USE - Used as liquid type alkali-free rapid-setting admixture. ADVANTAGE - The admixture is room temperature synthetic early strength type liquid, is rapidly develops the early strength of the concrete without affecting the final strength, and reduces the possibility of generating the alkali-base aggregate reaction and different brands of portland cement to meet the requirements of concrete construction; has low temperature resistance, high speed condensation, low dosage, no (low) corrosion, long-term storage performance, and is economical. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the admixture, comprising (i) adding graphene oxide and water to the modified polymeric sulfuric acid and obtaining the stable transparent solution by uniformly dispersing ultrasonically in an aluminum solution, and (ii) adding the performance modifier to the stable transparent solution obtained in step (i), stirring at room temperature for 1 hour, adding a stabilizer and stirring uniformly; and #use of admixture, comprising processing spraying concrete using a concrete jet machine, placing in concrete spraying at the nozzle of the machine, spraying normal temperature synthetic early-type liquid alkali-free quick-setting admixture to the concrete to prepare spraying concrete.