about 80 by weight to accommodate inclusion of other components such as portland blast furnace slag cement portland pozzolan cement natural cement slag cement hydraulic lime limestone chalk calcareous shell talc slag clay and or additional water soluble polymers and water soluble dispersing agents to increase the colloidal clay viscosity and plasticity such as disclosed in this assignee 39 s prior u s pat no 3 949 560 which patent is hereby incorporated by reference in amounts of about 0 15 by weight in every case the final mixture must meet astm standards for masonry cements as previously defined it should be noted for the purpose of this description of the present invention that the percentages described are for the masonry cement which does not include sand or water the percentages are substantially changed when sand and water are added to make a mortar but the additions of sand and water are made in accordance with astm specifications in standard amounts as with present prior art masonry cements and therefore applicant attaches no criticality to the water and sand additions needed to form a mortar accordingly percentages are described for the masonry cement only in accordance with an important feature of the present invention no wet grinding is necessary to manufacture the masonry cement of the present invention all components of the masonry cement of the present invention are added to a blender and dry blended together thereby eliminating the time consuming and necessary wet grinding associated with the addition of limestone to prior art masonry cements four masonry cement compositions were prepared in accordance with the present invention having.