TY - JOUR
T1 - Properties, mechanism, and optimization of superabsorbent polymers and basalt fibers modified cementitious composite
AU - Lyu, Zhenghua
AU - Shen, Aiqin
AU - Meng, Weina
N1 - Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/3/22
Y1 - 2021/3/22
N2 - Concrete is prone to shrinkage thus induces pavement cracking at early age. In this study superabsorbent polymers (SAP) and basalt fibers are utilized in concrete for pavement to mitigate the shrinkage and cracking. The effect of different SAP meshes (particle sizes), SAP contents, absorption ratios, and fiber contents on the key properties, including compressive and flexural strength, dynamic elastic modulus, autogenous shrinkage, and permeability, were investigated. The mixture design parameters were optimized by the weighted grey target optimization method. The results showed that the concrete was able to increase 4.6% in compressive strength, 5.66% in dynamic elastic modulus, and decrease 50.52% in autogenous shrinkage and 38.45% in RCM coefficient by properly combined SAP and basalt fibers at 28 day. Based on microstructure observation results, the enhancement mechanism of SAP and basalt fibers on the concrete performance were analyzed. The combination of SAP and basalt fibers, which can provide internal curing effect and bridging effect, proved to be beneficial for the crack resistance and service life of the concrete pavement.
AB - Concrete is prone to shrinkage thus induces pavement cracking at early age. In this study superabsorbent polymers (SAP) and basalt fibers are utilized in concrete for pavement to mitigate the shrinkage and cracking. The effect of different SAP meshes (particle sizes), SAP contents, absorption ratios, and fiber contents on the key properties, including compressive and flexural strength, dynamic elastic modulus, autogenous shrinkage, and permeability, were investigated. The mixture design parameters were optimized by the weighted grey target optimization method. The results showed that the concrete was able to increase 4.6% in compressive strength, 5.66% in dynamic elastic modulus, and decrease 50.52% in autogenous shrinkage and 38.45% in RCM coefficient by properly combined SAP and basalt fibers at 28 day. Based on microstructure observation results, the enhancement mechanism of SAP and basalt fibers on the concrete performance were analyzed. The combination of SAP and basalt fibers, which can provide internal curing effect and bridging effect, proved to be beneficial for the crack resistance and service life of the concrete pavement.
KW - Basalt fiber
KW - Enhancement mechanism
KW - Grey target optimization
KW - Pavement concrete
KW - SAP
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U2 - 10.1016/j.conbuildmat.2020.122212
DO - 10.1016/j.conbuildmat.2020.122212
M3 - Article
AN - SCOPUS:85099620074
SN - 0950-0618
VL - 276
JO - Construction and Building Materials
JF - Construction and Building Materials
M1 - 122212
ER -