TY - JOUR
T1 - Adhesion between steel slag aggregates and bituminous binder based on surface characteristics and mixture moisture resistance
AU - Moura, Bárbara Luiza Riz de
AU - Teixeira, Jamilla Emi Sudo Lutif
AU - Simão, Renata Antoun
AU - Khedmati, Mahdieh
AU - Kim, Yong Rak
AU - Pires, Patrício José Moreira
N1 - Funding Information:
This study was financed in part by ArcelorMittal Tubarão. The second author also thanks the CAPES (Pos-Doctoral Program Grant no. 88881.171157/2018-01) and CNPq (303845/2017-1) for the scholarship grants. The authors also thank COPPE (UFRJ) and UFC Federal Universities on the name of D.Sc. Thaisa Ferreira Macedo, M.Sc. Mieka Arão and Ph.D. Verônica Castelo Branco, for their technical support on surface free energy and AIMS tests.
PY - 2020/12/20
Y1 - 2020/12/20
N2 - Steel slag aggregates (SSA) have shown promising mechanical and physical properties for asphalt concrete application. However, SSA surface characteristics vary depending on the type of slag, which results in different binder-SSA adhesion that affects moisture damage of asphalt mixtures containing SSA. This study evaluated the adhesion in the binder-SSA system considering two typical types of slags (i.e. air-cooled blast furnace slag (ACBFS) and Linz-Donawitz steel slag (LD)) using various tests: morphological, physical, chemical, and surface energy measurements. Also, the moisture damage susceptibility of asphalt mixtures containing SSA were assessed based on two standard methods: ASTM D3625 and AASHTO T283. Test results showed strong influence of the SSA chemical composition and surface energy characteristics on the SSA-binder adhesion. LD showed a better adhesion with the asphalt binder than ACBFS due to its particular chemical and surface energy characteristics. The diminished adhesive bonding from ACBFS could be improved with proper surface treatment using additives such as hydrated lime and electrostatic precipitator powder, which change surface chemistry of ACBFS.
AB - Steel slag aggregates (SSA) have shown promising mechanical and physical properties for asphalt concrete application. However, SSA surface characteristics vary depending on the type of slag, which results in different binder-SSA adhesion that affects moisture damage of asphalt mixtures containing SSA. This study evaluated the adhesion in the binder-SSA system considering two typical types of slags (i.e. air-cooled blast furnace slag (ACBFS) and Linz-Donawitz steel slag (LD)) using various tests: morphological, physical, chemical, and surface energy measurements. Also, the moisture damage susceptibility of asphalt mixtures containing SSA were assessed based on two standard methods: ASTM D3625 and AASHTO T283. Test results showed strong influence of the SSA chemical composition and surface energy characteristics on the SSA-binder adhesion. LD showed a better adhesion with the asphalt binder than ACBFS due to its particular chemical and surface energy characteristics. The diminished adhesive bonding from ACBFS could be improved with proper surface treatment using additives such as hydrated lime and electrostatic precipitator powder, which change surface chemistry of ACBFS.
KW - Adhesion
KW - Blast furnace slag
KW - Moisture damage
KW - Steel slag
KW - Surface energy
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U2 - 10.1016/j.conbuildmat.2020.120685
DO - 10.1016/j.conbuildmat.2020.120685
M3 - Article
AN - SCOPUS:85091243911
VL - 264
JO - Construction and Building Materials
JF - Construction and Building Materials
SN - 0950-0618
M1 - 120685
ER -