▎ 摘　　要

NOVELTY - Water-stop backfill with high thermal conductivity comprises 40-60 pts. wt. modified expanded perlite, 30-60 pts. wt. water, 20-40 pts. wt. cement, 15-25 pts. wt. yellow sand, and 3-7 pts. wt. admixture. The preparation of the modified expanded perlite comprises (a) preparing nano thermal conductive powder dispersion, where the preparation raw materials include nano-graphene, nano-diamond, carbon nanotubes; (ii) pretreating expand perlite; and (iii) adding the pretreated expanded perlite to the nano heat-conducting powder dispersion, dipping, drying, and roasting. The coating solution is compounded by redispersible latex powder, multi-walled carbon nanotubes, acrylic resin emulsion, EVA emulsion and cement paste with a water-cement ratio of 0.6-0.8. The coating solution comprises 2-4% redispersible latex powder, 5-8% multi-walled carbon nanotubes, 30-40% acrylic resin emulsion, 35-40% ethylene-vinyl acetate emulsion, and cement slurry (remaining amount). USE - Used as water-stop backfill with high thermal conductivity. ADVANTAGE - The water-stop backfill has high thermal conductivity and good water-stop effect. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the water-stop backfill with high thermal conductivity.