Experiment research on effect of oyster shell particle size on mortar transmission properties

In order to study the feasibility of crushed waste oyster shell (CWOS) as an ocean engineering material, through the experimental study and analysis of compressive strength (fc), flexural strength (ff), apparent density, volume of permeable void (VPV), sorptivity, water permeability coefficient (WPC) and chloride charge passed (CCP) of CWOS mortars, the effects of CWOS content and particle size on mechanics properties and transmission properties of CWOS mortar are revealed. The results show that the mechanical property, apparent density and sorptivity of CWOS mortar increased with the decrease of particle size of CWOS, while VPV, WPC and CCP decreased. CWOS has a positive effect on improving the mechanical properties of mortar with the increasing of curing age. In addition, the finer the CWOS is, the better the mechanical properties and durability of the mortar are. Compared with the control mortar, the total cost of the CWOS mortar is reduced by 2%–5%, and the CO2 emission is reduced by 0.1%–0.5%. Therefore, considering the mechanical properties, durability and ecological performance, the F20-CWOS mortar is the most suitable choice for ocean engineering.