Abstract

A shrinkage compensating concrete does not require restraint. The expansive forces developed during hydration compensate for concrete shrinkage, obviating the need for any added internal or external restraint element. Using this new shrinkage compensating concrete, substantially crack-free slabs may be built without using restraining steel bars, fibers, or other separate restraining element. The shrinkage compensating concrete includes a cement that develops internal expansive forces that never exceed the tensile strength of the concrete, such that the internal expansion compensates for the concrete shrinkage. The expansive cement may be an ASTMS, M or S cement, or other expansive cements may also be used.

IPC Classes  ?

• C04B 7/00 - Hydraulic cements
• C04B 28/04 - Portland cements
• C04B 22/00 - Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators
• C04B 11/30 - Mixtures thereof with other inorganic cementitious materials with hydraulic cements, e.g. Portland cements
• C04B 28/06 - Aluminous cements
• C04B 14/06 - QuartzSand
• C04B 28/00 - Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
• C04B 9/12 - Mixtures thereof with other inorganic cementitious materials with hydraulic cements, e.g. Portland cements
• C04B 7/34 - Hydraulic lime cementsRoman cements
• C04B 32/00 - Artificial stone not provided for in other groups of this subclass
• C04B 111/62 - Self-levelling compositions
• C04B 111/34 - Non-shrinking materials