TY - JOUR
T1 - Early-age properties of alkali-activated slag and glass wool paste
AU - Li, Zhenming
AU - Alfredo Flores Beltran, Irving
AU - Chen, Yun
AU - Šavija, Branko
AU - Ye, Guang
PY - 2021
Y1 - 2021
N2 - In this study, glass wool waste was utilized by means of alkali-activation with blast furnace slag. Reaction kinetics, workability, mechanical properties and autogenous shrinkage of alkali-activated slag and glass wool were comprehensively studied. Results indicated an optimal modulus (SiO2/Na2O) of the activator related to a long enough setting time and a high reaction degree of alkali-activated slag paste. The incorporation of glass wool as partial slag replacement did not necessarily lead to degradation in the performance of the pastes. While the compressive strength was always lower when glass wool was incorporated in the mixture, the flexural strength and workability could be improved with proper glass wool dosages. Autogenous shrinkage of blended pastes was always lower compared to the the mixture without glass wool. The results in this paper suggest that waste glass wool can be used as a precursor in slag-based alkali-activated system, resulting in improvements in the early-age properties of the paste such as a prolonged setting time and reduced shrinkage.
AB - In this study, glass wool waste was utilized by means of alkali-activation with blast furnace slag. Reaction kinetics, workability, mechanical properties and autogenous shrinkage of alkali-activated slag and glass wool were comprehensively studied. Results indicated an optimal modulus (SiO2/Na2O) of the activator related to a long enough setting time and a high reaction degree of alkali-activated slag paste. The incorporation of glass wool as partial slag replacement did not necessarily lead to degradation in the performance of the pastes. While the compressive strength was always lower when glass wool was incorporated in the mixture, the flexural strength and workability could be improved with proper glass wool dosages. Autogenous shrinkage of blended pastes was always lower compared to the the mixture without glass wool. The results in this paper suggest that waste glass wool can be used as a precursor in slag-based alkali-activated system, resulting in improvements in the early-age properties of the paste such as a prolonged setting time and reduced shrinkage.
KW - Alkali-activated slag
KW - Glass wool
KW - Mechanical properties
KW - Shrinkage
KW - Waste
KW - Workability
UR - http://www.scopus.com/inward/record.url?scp=85105698545&partnerID=8YFLogxK
U2 - 10.1016/j.conbuildmat.2021.123326
DO - 10.1016/j.conbuildmat.2021.123326
M3 - Article
AN - SCOPUS:85105698545
SN - 0950-0618
VL - 291
SP - 1
EP - 13
JO - Construction and Building Materials
JF - Construction and Building Materials
M1 - 123326
ER -