Properties of Concrete Properties of Concrete Tricalcium aluminate – C3A Tricalcium aluminate – C3A Tetracalcium aluminoferrite Properties of Concrete Properties of Concrete Scanningelectron micrographs of hardened cement paste Image shown is a twodimensional slice from a threedimensional spherical computational volume Unhydrated cement cores are dark blue,, Inner CSH product is red ...