Property Evolution Law and Damage Mechanism of Pervious Concrete under Different Cycle Modes
WU Yi
DANG Faning
NIMBALKAR Sanjay
CHEN Yaqin
ZHANG Fenghua
Abstract：In order to investigate the effect of water on pervious concrete(PC)pavement,the performance evolution equations of PC under three cycle modes of dry-wet,freeze-thaw,dry-wet and freeze-thaw were studied,and the damage mechanism under single and double factors were revealed.The results show that the basalt fiber(BF)changes the pore structure and initial property of PC,but does not affect the freeze-thaw damage mechanism.The secondary cracks of PC pavement caused by freeze-thaw cycle increase exponentially,which is different from the performance evolution law under dry-wet cycle.Dry-wet cycle in the early stage of damage causes the dissolution,loss of pore wall surface material and edge curl and peel,while freeze-thaw in the late stage of damage causes the formation and expansion of cracks,resulting in intergranular fracture.Under the coupling effect of wet-dry cycle and freeze-thaw cycle,the PC performance index decreases more than the single factor superposition of wet-dry cycle and freeze-thaw cycle.
Keywords：pervious concretedry-wet and freeze-thaw cyclepore structureevolution equationdamage mechanism
Publication Date：2025-01-27
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：10( 9-18 )