Grand Housing Development Program Volume III - Gtz

FLOORING WITH CEMENT OXIDE SCREEDCasting of cement oxide screed on the ground floor slabwithout reinforcement or plastic sheet.Glass wool is mixedinto the cementoxide screed. Thefibres of the glasswool act as reinforcementto avoidcracks caused bymaterial shrinkageand temperaturechanges.To further avoidcracks caused bymaterial shrinkage,the continuous areacovered by the cementscreed has tobe kept small.Expansion jointsare introducedaccording to thefoundation stripesof the walls.- Cast cement oxide screed- Cover to prevent drying out- Cut additional expansion joints where necessary- PolishTo avoid cracks,5 mm Styrofoamhas to be placed inbetween the wallsand the cementscreed.OverlappingStyrofoam is cutafter curing of thescreed and coveredby the skirtingboards.Curing period. Toprevent cementscreed from dryingout, it is covered byplastic sheet.Too fast drying ofthe cement screedwould result incracks.In some areas the screed is cut providing an expansion jointto avoid uncontrolled cracking.- Because the cement oxide screed is considered asa high quality finish, irregularities in the finish andcracks have to be avoided.- Mix glass wool into the cement screedTHE KASANCHIS RENOVATION PROJECT HINTS ON THE EXECUTION OF WORK57Addis AbabaCity Government