Investigation of the Effect of Mixing Time on the Mechanical Properties of Alkali-Activated Cement Mixed with Fly Ash and Slag

被引:5
作者
Kim, Taewan [1 ]
Kang, Choonghyun [2 ]
机构
[1] Pusan Natl Univ, Dept Civil Engn, Busan 46241, South Korea
[2] Gyeongsang Natl Univ, Dept Ocean Civil Engn, Tongyeong 53064, South Korea
基金
新加坡国家研究基金会;
关键词
slag; fly ash; mixing method; high alkali environment; mixing time; BLAST-FURNACE SLAG; SODIUM-SILICATE; PART I; MICROSTRUCTURAL DEVELOPMENT; PHASE EVOLUTION; ASH/SLAG PASTE; STRENGTH; CONCRETE; WORKABILITY; TEMPERATURE;
D O I
10.3390/ma14092301
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
This is an experiment on the effect of mixing time for alkali-activated cement (AAC) using a binder mixed with ground granulated blast furnace slag (slag) and fly ash (FA) in a ratio of 1:1 on the mechanical properties. The mixing method of ASTM C305 was used as the basic mixing method, and the following mixing method was changed. Simply adding the same mixing time and procedure, the difference in the order of mixing slag and FA, and controlling the amount of activator and mixed water were considered. As a result of the experiment, the addition of the same mixing time and procedure, pre-injection of slag, and high-alkali mixed water in which half of the activator and mixing water were mixed showed the highest mechanical properties and a dense pore structure. As a result, the design of a blending method that can promote the activation action of slag rather than FA at room temperature was effective in improving the mechanical properties of AAC. In addition, these blending factors showed a clearer effect as the concentration of the activator increased. Through the results of this experiment, it was shown that high-temperature curing, high fineness of the binder, or even changing the setting of the mixing method without the use of excessive activators can lead to an improvement of mechanical properties.
引用
收藏
页数:26
相关论文
共 50 条
[41]   Effect of fly ash to slag ratio and Na2O content on leaching behaviour of fly Ash/Slag based alkali activated materials [J].
Srinivasamurthy, Lakshmikanth ;
Chevali, Venkata S. ;
Zhang, Zuhua ;
Wang, Hao .
CONSTRUCTION AND BUILDING MATERIALS, 2023, 383
[42]   Effect of temperature on the fresh and hardened state properties of alkali-activated slag/fly ash mixtures [J].
Xiaodi Dai ;
Serdar Aydin ;
Mert Yücel Yardimci ;
Yubo Sun ;
Geert De Schutter .
Materials and Structures, 2023, 56
[43]   Effect of Active MgO on Compensated Drying Shrinkage and Mechanical Properties of Alkali-Activated Fly Ash-Slag Materials [J].
Ma, Hongqiang ;
Li, Shiru ;
Lei, Zelong ;
Wu, Jialong ;
Yuan, Xinhua ;
Niu, Xiaoyan .
BUILDINGS, 2025, 15 (02)
[44]   Workability and mechanical properties of alkali-activated fly ash-slag concrete cured at ambient temperature [J].
Fang, Guohao ;
Ho, Wing Kei ;
Tu, Wenlin ;
Zhang, Mingzhong .
CONSTRUCTION AND BUILDING MATERIALS, 2018, 172 :476-487
[45]   Chemo-mechanical properties of alkali-activated slag/fly ash paste incorporating white mud [J].
Sun, Renjuan ;
Fang, Chen ;
Zhang, Hongzhi ;
Ling, Yifeng ;
Feng, Jingjing ;
Qi, Hui ;
Ge, Zhi .
CONSTRUCTION AND BUILDING MATERIALS, 2021, 291
[46]   Comparative Analysis of Heat Release, Bound Water Content and Compressive Strength of Alkali-Activated Slag-Fly Ash [J].
Joseph, Shiju ;
Cizer, Ozlem .
FRONTIERS IN MATERIALS, 2022, 9
[47]   Shrinkage of Alkali-Activated Combined Slag and Fly Ash Concrete Cured at Ambient Temperature [J].
Rodrigue, Alexandre ;
Bissonnette, Benoit ;
Duchesne, Josee ;
Fournier, Benoit .
ACI MATERIALS JOURNAL, 2022, 119 (03) :15-23
[48]   Producing of alkali-activated artificial aggregates by pelletization of fly ash, slag, and seashell powder [J].
Bekkeri, Gopal Bharamappa ;
Shetty, Kiran K. ;
Nayak, Gopinatha .
INNOVATIVE INFRASTRUCTURE SOLUTIONS, 2023, 8 (10)
[49]   Effect of slag, silica fume, and metakaolin on properties and performance of alkali-activated fly ash cured at ambient temperature [J].
Alanazi, Hani ;
Hu, Jiong ;
Kim, Yong-Rak .
CONSTRUCTION AND BUILDING MATERIALS, 2019, 197 :747-756
[50]   Experimental Study On Alkali-activated Slag-Lithium Slag-Fly Ash Environmental Concrete [J].
Zhang, Lanfang ;
Wang, Ruiyan .
APPLICATIONS OF ENGINEERING MATERIALS, PTS 1-4, 2011, 287-290 :1237-1240