Exploring the role of calcium sulfate in supersulfated cement: A study of rheological, mechanical, and microstructural properties

被引:4
作者
De Re, Julia Kich [1 ]
Sokolovski, Andre Luiz [1 ]
Silvestro, Laura [1 ]
da Luz, Caroline Angulski [1 ]
de Matos, Paulo Ricardo [2 ]
Hooton, R. Douglas [3 ]
机构
[1] Fed Univ Technol Parana UTFPR, Grad program Civil Engn PPGEC, Pato Branco, Brazil
[2] Santa Catarina State Univ UDESC, Ctr Technol Sci CCT, Dept Civil Engn, Joinville, SC, Brazil
[3] Univ Toronto, Dept Civil Engn, 35 St George St, Toronto, ON M5S 1A4, Canada
关键词
Calcium sulfate; Rheology; Hydration; Mechanical properties; Supersulfated cement; BLAST-FURNACE SLAG; HYDRATION MECHANISMS; PORTLAND-CEMENT; MODIFIED PHOSPHOGYPSUM; LIMESTONE; PASTES; TEMPERATURE; STABILITY; PLASTER; POWDER;
D O I
10.1016/j.conbuildmat.2024.138535
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
In order to investigate the impact of different calcium sulfate (CS) sources and forms on the rheology, hydration, and mechanical properties of supersulfated cement (SSC), SSC pastes were produced with anhydrite from gypsum calcined at 650 degrees C and raw and calcined phosphogypsum (PG) at 150, 350, and 650 degrees C. Isothermal calorimetry, rheometry using parallel-plate geometry, compressive strength testing, and microstructural analysis through Xray diffraction (XRD) and thermogravimetric analysis (TGA/DTG) were performed. Results showed that SSC containing gypsum and PG calcined at 650 degrees C exhibited similar rheological behavior. Pastes containing PG calcined at 150 degrees C and raw PG respectively, exhibited the highest and lowest shear stress at a given shear rate. The calcination temperature and CS source did not significantly impact SSC compressive strength. Rietveld XRD analysis revealed that pastes with PG calcined at 350 degrees C and gypsum calcined at 650 degrees C had the lowest and highest ettringite development, respectively, from 7 to 28 days of curing.
引用
收藏
页数:15
相关论文
共 89 条
  • [1] 911metallurgist, Table of Bond Work Index by Minerals
  • [2] Abreu E.M.X., 2005, Dissertaca
  • [3] Influence of limestone on the hydration of ternary slag cements
    Adu-Amankwah, Samuel
    Zajac, Maciej
    Stabler, Christopher
    Lothenbach, Barbara
    Black, Leon
    [J]. CEMENT AND CONCRETE RESEARCH, 2017, 100 : 96 - 109
  • [4] Comparison of SCM reactivity to performance in cement-based mixtures
    Al-Shmaisani, Saif
    Kalina, Ryan D.
    Ferron, Raissa Douglas
    Juenger, Maria C. G.
    [J]. MATERIALS AND STRUCTURES, 2022, 55 (10)
  • [5] Influence of Supersulfated Cement Composition on Hydration Process
    Angulski da Luz, C.
    Hooton, R. D.
    [J]. JOURNAL OF MATERIALS IN CIVIL ENGINEERING, 2019, 31 (06)
  • [6] Influence of curing temperature on the process of hydration of supersulfated cements at early age
    Angulski da Luz, C.
    Hooton, R. D.
    [J]. CEMENT AND CONCRETE RESEARCH, 2015, 77 : 69 - 75
  • [7] [Anonymous], 2015, EN 15743
  • [8] Associacao Brasileira de Normas Tecnicas, 2015, NBR 16372: Cimento Portland e outros materiais em po-Determinacao da finura pelo metodo de permeabilidade ao ar (metodo de Blaine)
  • [9] Associacao Brasileira de Normas Tecnicas, 2017, NBR 16605: Cimento Portland e outros materiais em po-Determinacao da massa especifica
  • [10] ASTM, 2020, C1897 ASTM