Annulus Grouting

Normet’s annulus grouting solutions are engineered to fill the void between tunnel linings and surrounding ground in TBM operations. Our range includes TamCem R, TamCem 8BFG, TamCem 9BFG, and TamShot 10SS—each designed to optimize pumpability, gel time, strength development, and bleed control. These admixtures ensure uniform load transfer, minimize settlement, and protect gaskets and linings. With on-site support, lab testing, and eco-friendly formulations, Normet helps deliver safe, efficient, and durable TBM tunnelling worldwide.

TamCem R

Set retarding plasticising admixture for TBM backfill grout

TamShot 10SS

Sprayed concrete and annulus grout accelerator

TamCem 8BFG

Special plasticiser / Retarder for TBM backfill grouts

TamCem 9BFG

Set retarding plasticising admixture for grouts, incorporating a strength enhancer