期刊
MATERIALS
卷 12, 期 13, 页码 -出版社
MDPI
DOI: 10.3390/ma12132072
关键词
alkali-activator; GGBFS; Na2O content; Ms (SiO2; Na2O); workability; setting time
类别
资金
- Construction Technology Research Program - Ministry of Land, Infrastructure, and Transport of the Korean government [19SCIP-B103706-05]
The performance of alkali-activated slag (AAS) paste using activators of strong alkali components is affected by the type, composition, and dosage of the alkaline activators. Promoting the reaction of ground granulated blast furnace slag (GGBFS) by alkaline activators can produce high-strength AAS concrete, but the workability might be drastically reduced. This study is aimed to experimentally investigate the heat release, workability, and setting time of AAS pastes and the compressive strength of AAS mortars considering the Na2O content and the ratio of Na2O to SiO2 (Ms) of binary alkaline activators blended with sodium hydroxide and sodium silicate. The test results indicated that the AAS mortars exhibited a high strength of 25 MPa at 24 h, even at ambient temperature, even though the pastes with an Na2O content of >= 6% and an Ms of >= 1.0 exhibited an abrupt decrease in flowability and rapid setting.
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