Calcium phosphate cement compositions are provided. Aspects of the cement compositions include a dry reactant component comprising a reactive α-tricalcium phosphate component, a multi-size pore forming calcium sulphate dihydrate component and a demineralized bone matrix component. During use, the dry reactant is combined with a setting fluid to produce a sellable composition that sets into a high strength porous product. Aspects of the invention further include the settable compositions themselves as well as kits for preparing the same. Methods and compositions as described herein find use in a variety of applications, including hard tissue repair applications.