▎ 摘　　要

NOVELTY - Cement-based composite slurry comprises 100-300 pts. wt. cement, 450-650 pts. wt. sea sand coated with graphene oxide, 1-15 pts. wt. water reducing agent, and 50-250 pts. wt. water. USE - Cement-based composite slurry for use in coastal areas. ADVANTAGE - The slurry has low cost, high mechanical strength and strong practicability, and reduces chlorine ion leaching on the surface of the sea sand, and has a larger specific surface area and surface oxygen-containing functional group due to oxidation graphene providing the growth site for the hydration product and acting as a template, promotes cement hydration reaction to generate hydrated calcium silicate and salt, and improves ability of absorbing chloride ions. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for preparing cement-based composite slurry.