Study on preparation and performance of new alkali-free liquid accelerator
YANG Liyang
TIAN Juntao
HU Xiaofeng
YANG Yibo
Abstract：An alkali-free liquid setting accelerator was prepared using aluminum sulfate,fluoride aluminum complex solution,oxalic acid,diethanolamine and stabilizer as main materials.Homogeneity index of the alkali-free setting accelerator was tested.The influence of accelerator on the setting time and strength of mortar as well as the adaptation of cement were investigated.The mechanism of alkali-free accelerator was analyzed by means of XRD and SEM.The results indicated that the initial setting time and final setting time of the Great Wall P·O42.5 cement were 2.3min and 7.4min respectively,the 1 d and 28d compressive strength ratio were 148％ and 106％ respectively when the dosage of liquid accelerator was 6％.The liquid setting accelerator has good adaptability with P·O42.5 cement of different brands,the Great Wall P·I52.5 cement and P·C32.5 cement when the dosage was varied between 6％ to 8％.The concentration of present in cement paste was increased by the addition of the alkali-free accelerator,thus promoting the crystallization of ettringite between the cement particles,thus connecting them and accelerating the setting.
Keywords：acceleratoraluminum sulfateoxalic acidcompatibilitydiethanolamine
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 29-32,40 )