摘要 |
The invention relates to a cement composition for a self-leveling fluid screed with limited contraction, made of a mixture of a cement binder, a fluidizing admixture, an aggregate and water, characterized in that the binder consists of 70 to 85 wt % of Portland cement, 7 to 18 wt % of sulfoaluminate clinker, and 6 to 14 wt % of calcium sulfate, with a mole ratio of calcium sulfate C$ to calcium sulfoaluminate C4A3$ of between 5 and 7, and a water to binder weight ratio of between 0.60 and 0.90. The self-leveling fluid screed thus produced has a mechanical resistance to compression at 24 hours that is at least equal to 1 MPa, a shrinkage at 7 days, measured under a relative hygrometer of 50%, of less than 500 µm/m, and an endogenous expansion value measured at 7 days of less than 1000 µm/m, as well as very slightly raised edges. |
申请人 |
CIMENTS FRANCAIS;LE ROLLAND, BRUNO;ROUX, ANDRE;VESPASIEN, SYLVIA |
发明人 |
LE ROLLAND, BRUNO;ROUX, ANDRE;VESPASIEN, SYLVIA |