Overview
Within the development of innovative multi-component annular gap mortars, in subproject B3, in addition to the alkaline activation of slag-containing binder systems (Geopolymers), a rapid solidification on the physical level due to the addition of superabsorbent polymers (SAP) to a typical mortar could be achieved. By using an alkali-stable polymer with a sufficient water absorption capacity, a rapid stiffening of the material due to the caused internal dewatering within a few minutes could be detected. To investigate the suitability for backfilling of various annular gap mortars, a large-scale test setup was developed, in which typical parameters such as advance rate and pressures, but also different soils can be varied and the effects on the mortar recorded.
