TamCem 8BFG is a special plasticiser/retarder for TBM backfill grouts and some concrete applications. It is a non-chloride liquid admixture formulated to give high water reduction, greater workability and extended open time to concrete and cementitious grouts. It is compatible with all cements meeting recognised international standards. It complies with the requirements of EN 934-2 and ASTM C 494 for Type B retarding admixtures.
TamCem 8BFG extends the hydration process by retarding both initial and final set times and enhances strength through cement particle dispersion. In TBM backfill grouts the setting and hydration control can be regulated using sodium silicate accelerators such as with TamShot 10SS.
Key Benefits
Good cohesion, no segregation and minimal bleed water with extremely high levels of workability.
Controllable, long open time, enhanced placement and delivery control.
High elastic modulus, low shrinkage and creep are achieveable with graded coarse and fine aggregates.
Superior surface finishes.
Typical Applications
TBM backfill grout admixture
High performance concrete
Mixing logistics efficiency during large pour
Hot weather concrete and grouting
Peak temperature controlled concrete Highly durable concrete
Ideal for long distance transportation of ready mixed concrete