Print Email Facebook Twitter Experimental comparisons between one-part and normal (two-part) alkali-activated slag binders Title Experimental comparisons between one-part and normal (two-part) alkali-activated slag binders Author Ren, Jie (Shenzhen University) Sun, Hongfang (Shenzhen University) Li, Qun (Shenzhen University) Li, Z. (TU Delft Materials and Environment) Ling, Li (Shenzhen University) Zhang, Xiaogang (Shenzhen University) Wang, Yanshuai (Shenzhen University) Xing, Feng (Shenzhen University) Date 2021 Abstract One-part alkali-activated slag (AAS) binders are more promising in large-scale constructions because one-part mixing procedure is safer and easier to handle compared to normal two-part method. Thus, this study aims at investigating different properties of one-part AAS binders and control samples prepared using the two-part method. Experimental results of the former suggested the hardening time was greatly extended, but the workability showed little difference. Besides, compared to the control, one-part AAS binders had similar early compressive strength (within 7 days) and flexural strength in all tested curing stages but lower later compressive strength (from 28 days). The characterisation of the porous structures suggests that there were fewer C-A-S-H gels for one-part binders evidenced by less volume of mesopores but with larger amount of bigger pores. In addition, mineralogical and microstructural analyses imply that there was no hydrotalcite formed in the one-part AAS binders. Moreover, one-part AAS binders are more susceptible to efflorescence, presumably further affecting their surface and long-term durability. Subject One-part alkali-activated slagMechanical propertiesMineralogical and microstructural analysisPore microstructureEfflorescence To reference this document use: http://resolver.tudelft.nl/uuid:5ab708a8-d735-4b1a-89e8-c6c3e0e30cec DOI https://doi.org/10.1016/j.conbuildmat.2021.125177 Embargo date 2023-10-09 ISSN 0950-0618 Source Construction and Building Materials, 309, 1-10 Bibliographical note Accepted author manuscript Part of collection Institutional Repository Document type journal article Rights © 2021 Jie Ren, Hongfang Sun, Qun Li, Z. Li, Li Ling, Xiaogang Zhang, Yanshuai Wang, Feng Xing Files PDF clean_version_of_revised_paper.pdf 1.43 MB Close viewer /islandora/object/uuid:5ab708a8-d735-4b1a-89e8-c6c3e0e30cec/datastream/OBJ/view