@Article{jrm.2023.028439,
AUTHOR = {Ying Ji, Xi Liu},
TITLE = {Preparation of High Activity Admixture from Steel Slag, Phosphate Slag and Limestone Powder},
JOURNAL = {Journal of Renewable Materials},
VOLUME = {11},
YEAR = {2023},
NUMBER = {11},
PAGES = {3977--3989},
URL = {http://www.techscience.com/jrm/v11n11/54434},
ISSN = {2164-6341},
ABSTRACT = {The problem of low disposal and utilization rate of bulk industrial solid waste needs to be solved. In this paper, a
high-activity admixture composed of steel slag-phosphate slag-limestone powder was proposed for most of the
solid waste with low activity and a negative impact on concrete workability, combining the characteristics of each
solid waste. The paper demonstrates the feasibility and explains the principle of the composite system in terms of
water requirement of standard consistency, setting time, workability, and mechanical properties, combined with
the composition of the phases, hydration temperature, and microscopic morphology. The results showed that the
steel slag:phosphate slag:limestone = 5:2:3 gave the highest activity of the composite system, over 92%. Besides, the
composite system had no significant effect on water demand and setting time compared to cement, and it could
significantly increase the 7 and 28 d activity of the system. The composite system delayed the exothermic hydration of the cement and reduced the exothermic heat but had no effect on the hydration products. Therefore, the
research in this paper dramatically improved the solid waste dissipation in concrete, reduced the amount of
cement in concrete and positively responded to the national slogan of carbon neutral and peaking.},
DOI = {10.32604/jrm.2023.028439}
}