Cli­ent: Muni­ci­pa­lity of Forst/Lusatia
Pro­ject type: Refur­bish­ment of cycling track in Forst
Mate­rial: Shot­crete C 35/ 45
Exe­cu­tion of over­all mea­sure: Con­s­truc­tion com­pany Gerd Mül­ler GmbH
Exe­cu­tion of shot­crete steep bends: AUGUST REINERS Bau­un­ter­neh­mung GmbH

The Forst cycling track has exis­ted since 1906 and has an open con­crete track over 400 meters long. Stand-up races and GDR cham­pi­on­ships have been held on it ever since. In 1932, the film “Strich durch die Rech­nung” with Heinz Rüh­mann was shot on the track.
The track was last reno­va­ted bet­ween 1992 and 1994 at a cost of DM 1.4 mil­lion. The track is curr­ently being reno­va­ted or rene­wed again by the town of Forst as part of a fede­ral pro­gram “Reno­va­tion of muni­ci­pal faci­li­ties in the areas of sport, youth and cul­ture”, in which com­ple­tely new, rein­forced
con­crete slabs are being laid on top of the exis­ting con­crete slabs. The two steep bends on the long sides with a gra­di­ent of up to 69% pro­ved to be par­ti­cu­larly difficult. 

The con­s­truc­tion com­pany Gerd Mül­ler GmbH, which was com­mis­sio­ned with the con­s­truc­tion pro­ject, made seve­ral attempts in advance to con­cre­ting con­ven­tio­nally as close as pos­si­ble to these steep bends and also to pla­cing the con­crete using a hand-gui­ded wet spray­ing machine. Finally, tog­e­ther with August Rei­ners Bau­un­ter­neh­mung GmbH, fur­ther tests were car­ried out with the Putz­meis­ter SPM 500 con­crete spray­ing sys­tem used in tun­nel construction. 

The use of the SPM 500 and impro­ve­ments to the shot­crete mix, as well as the fur­ther deve­lo­p­ment of a con­ven­tio­nal screed by con­s­truc­tion com­pany Gerd Mül­ler GmbH, made it pos­si­ble to con­crete the steep areas in such a way that the sur­face pro­vi­ded a good sub­strate for the final sur­face pro­tec­tion system.