Formulation of an alkali-free accelerator and its effects on hydration and mechanical properties of Portland cement

被引：45
|
作者：
Wang, Yifei [1 ,2 ,3 ]
Shi, Caijun [1 ,2 ,3 ,4 ]
Lei, Lei [5 ]
Ma, Yihan [1 ,2 ,3 ]
Liu, Jianhui [6 ]
Hu, Xiang [1 ,2 ,3 ]
机构：
[1] Hunan Univ, Coll Civil Engn, Key Lab Green & Adv Civil Engn Mat & Applicat Tec, Changsha 410082, Hunan, Peoples R China
[2] Hunan Univ, Int Sci Innovat Collaborat Base Green & Adv Civil, Changsha 410082, Hunan, Peoples R China
[3] Hunan Univ, Key Lab Bldg Safety & Energy Efficiency, Minist Educ, Changsha 410082, Hunan, Peoples R China
[4] Univ British Columbia, Dept Civil Engn, 6250 Appl Sci Lane, Vancouver, BC V6T 1Z4, Canada
[5] Tech Univ Muncheen, Chair Construct Chem, Lichtenbergstr 4, D-85747 Garching, Germany
[6] Guangxi Univ, Sch Civil Engn & Architecture, Key Lab Disaster Prevent & Struct Safety, China Minist Educ, Nanning 530004, Peoples R China
来源：
CEMENT & CONCRETE COMPOSITES | 2022年 / 129卷
基金：
中国国家自然科学基金;
关键词：
Alkali-free accelerator; Aluminum sulfate; Magnesium sulfate; Hydration; Mechanical properties; PORE SOLUTION; PASTES; TEMPERATURE; SHOTCRETE; STRENGTH;
D O I：
10.1016/j.cemconcomp.2022.104485
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
An alkali-free accelerator (AMD) mainly composed of aluminum sulfate, magnesium sulfate and diethanolamine (DEA) was formulated and its effects on hydration and mechanical properties of Portland cement were investigated. Results indicate that AMD accelerator can efficiently shorten the setting time and enhance the early strength of Portland cement. The rapid setting and hardening properties were achieved by promoting the formation of ettringite (AFt), Mg(OH)2 and MgAl-hydrotalcite (MgAl-LDHs). Although AMD accelerator retarded early hydration of alite due to the accelerated hydration of C3A and caused higher porosity, it had no negative effect on or even slightly increased long-term strength development. Except for environmentally-friendly advantage, this type of alkali-free accelerator is more beneficial to strength development compared to accelerators with fluoride salts.
引用
收藏
页数：10
相关论文
共 50 条
  • [1] The mechanism of alkali-free liquid accelerator on the hydration of cement pastes
    Li, Guoxin
    Zhang, Jiangbo
    Niu, Mengdie
    Song, Zhanping
    CONSTRUCTION AND BUILDING MATERIALS, 2020, 233
  • [2] Effect of Alkali-Free Accelerators on Early Age Hydration of Portland Cement
    Zeng, Luping
    Qiao, Min
    Wang, Wei
    Ran, Qianping
    Hong, Jinxiang
    Jianzhu Cailiao Xuebao/Journal of Building Materials, 2021, 24 (01): : 31 - 38
  • [3] Quantification of cement hydration when using an alkali-free setting accelerator
    Xu, Q
    Stark, J
    ZKG INTERNATIONAL, 2005, 58 (10): : 68 - 79
  • [4] Effect of aluminum sulfate alkali-free liquid accelerator with compound alkanol lamine on the hydration processes of Portland cement
    Wu, Zhihong
    Liu, Jiayuan
    Zhang, Guoli
    Wang, Yao
    Wang, Yubin
    CONSTRUCTION AND BUILDING MATERIALS, 2021, 308
  • [5] Effects of setting regulators on the efficiency of an inorganic acid based alkali-free accelerator reacting with a Portland cement
    Maltese, C.
    Pistolesi, C.
    Bravo, A.
    Cella, F.
    Cerulli, T.
    Salvioni, D.
    CEMENT AND CONCRETE RESEARCH, 2007, 37 (04) : 528 - 536
  • [6] Effect of Synthesized Fe(OH)3 in Aluminum Sulfate Alkali-Free Liquid Accelerator on the Properties of Portland Cement
    Li, Haiyan
    Wang, Yuxin
    Zhang, Yajie
    Qin, Youmin
    Zhu, Jianping
    Han, Peng
    JOURNAL OF MATERIALS IN CIVIL ENGINEERING, 2025, 37 (05)
  • [7] Effect of Silica Fume on the Properties of Cement Paste with Alkali-free Accelerator
    Chen C.
    Sun Z.
    Cailiao Daobao/Materials Reports, 2019, 33 (07): : 2348 - 2353
  • [8] A case history: Effect of moisture on the setting behaviour of a Portland cement reacting with an alkali-free accelerator
    Maltese, C.
    Pistolesi, C.
    Bravo, A.
    Cella, F.
    Cerulli, T.
    Salvioni, D.
    CEMENT AND CONCRETE RESEARCH, 2007, 37 (06) : 856 - 865
  • [9] Preparation of alkali-free liquid accelerator based on aluminum sulfate and its accelerating mechanism on the hydration of cement pastes
    Niu, Mengdie
    Li, Guoxin
    Zhang, Jiangbo
    Cao, Li
    CONSTRUCTION AND BUILDING MATERIALS, 2020, 253
  • [10] Investigation into the effect of sulfoaluminate cement on compressive strength and impermeability of Portland cement with alkali-free accelerator at low temperatures
    Lu, Liulei
    Liu, Yawei
    Luo, Qi
    Wang, Junfeng
    Yi, Peng
    Xie, Xiaozhong
    Xing, Feng
    JOURNAL OF BUILDING ENGINEERING, 2025, 101
12345