reference will now be made in detail to the presently preferred embodiments of the invention . although the disclosed pre - mixed mortar , stucco or masonry mixture is ideal for use in masonry , mortar and stucco , there is no limitation to the application of the mortar , stucco or masonry mix of the present invention . prior to the present invention , pre - mixed mortar , stucco or masonry mix is typically delivered to the job site in bags weighing 78 or 80 pounds . the weight of these bags often causes stress and strain injuries to the workers . additionally , transporting and storage of these bags utilizes more space and energy than is needed . the pre - mixed cement of the present invention provides the same resulting volume of cement with the strength and consistency of the prior art cement mixtures at a per - bag weight of approximately 65 pounds , saving energy and storage space and reducing worker stress and strain . although 65 pound bags are used as an example , it is known and anticipated to produce the claimed product in any size bag or container including an 80 pound bag that will produce a greater resulting volume than an 80 pound bag of the prior art cement mixtures . the mortar , stucco or masonry mix of the present invention is mixed with water as the prior mortar , stucco or masonry mixes . mixing a 65 pound container of the pre - mixed cement mix of the present invention with water , results in a volume is similar to that of an 80 pound container of a pre - mixed cement mix of the prior art . therefore , a 65 pound bag of the mortar , stucco or masonry mix of the present invention produces a similar amount ( volume ) of mortar , stucco or masonry when mixed with water as did an 80 pound bag of the prior art . in some embodiments , the pre - mixed mortar , stucco or masonry mix of the present invention consists of approximately 75 % sand and a light - weight cement mix composition of from 35 % to 90 % cement by weight ( either slag cement , portland cement or hydraulic cement ), from 2 % to 10 % fly ash or hydrous magnesium sulfate by weight , from 1 % to 3 % sodium tall oil ( e . g ., a wood pulp by - product ) by weight , from 1 % to 2 % sodium stearate by weight , from 1 % to 2 % sodium c 14 - 16 alpha olefin by weight , from 1 % to 3 % linear alkyl benzene by weight and from 10 % to 20 % silicon dioxide sio 2 ( also known as silica or silox ) or fly ash by weight . silicon dioxide sio 2 is often derived from fly ash which is a byproduct of coal combustion . fly ash also consists of aluminum oxide ( al 2 o 3 ) and iron oxide ( fe 2 o 3 ). in some embodiments , the pre - mixed mortar , stucco or masonry mix of the present invention consists of approximately 75 % sand and a light - weight cement mix composition of from 35 % to 90 % of either slag cement , portland cement and / or gypsum , from 2 % to 10 % ground granulated blast furnace slag ( ggbfs ) by weight , from 1 % to 3 % sodium tall oil ( e . g ., a wood pulp by - product ) by weight , from 1 % to 2 % sodium stearate by weight , from 1 % to 2 % sodium c 14 - 16 alpha olefin by weight , from 1 % to 3 % linear alkyl benzene by weight and from 10 % to 20 % silicon dioxide sio 2 ( also known as silica or silox ) by weight . silicon dioxide sio 2 is often derived from fly ash which is a byproduct of coal combustion . fly ash also consists of aluminum oxide ( al 2 o 3 ) and iron oxide ( fe 2 o 3 ). in some embodiments , the pre - mixed mortar , stucco or masonry mix of the present invention consists of approximately 75 % sand and a light - weight cement mix composition of from 60 % to 91 % of portland cement by weight , from zero to 20 % slag cement by weight , from 4 % to 20 % ground plastic , preferably polystyrene by weight , from 0 % to 20 % perlite or mica by weight , and from 5 % to 10 % clay by weight . although any type of clay is anticipated , a silicate material known as kaolin is preferred , for example , as 2 h 2 . although any type of plastic is anticipated , including , but not limited to , polystyrene , abs , acrylic , fiberglass , latex powder , and vinyl acetate ; polystyrene is preferred . although any form of polystyrene is anticipated , it is preferred that the polystyrene be in the form of a fine powder , between 75 to 375 mesh , preferably between 350 and 375 mesh . one method of producing polystyrene is a fine powder of around 350 to 375 mesh is by dry freezing the polystyrene , and pulverizing and / or grinding the polystyrene to an approximately 350 - 375 mesh . in some embodiments , the polystyrene is recycled polystyrene , such as from packing material . when a 65 pound bag of pre - mixed cement mix of the present invention is mixed with aggregate and water , it produces , for example , a similar amount of product as a 78 or 80 pound bag of pre - mixed cement of the prior art . therefore , less weight is transported to the job site , less strain is placed upon the workers , yet the same amount of resulting mix is derived . equivalent and proportional results are achieved with smaller or larger sized bags or containers . equivalent elements can be substituted for the ones set forth above such that they perform in substantially the same manner in substantially the same way for achieving substantially the same result . it is believed that the system and method of the present invention and many of its attendant advantages will be understood by the foregoing description . it is also believed that it will be apparent that various changes may be made in the form , construction and arrangement of the components thereof without departing from the scope and spirit of the invention or without sacrificing all of its material advantages . the form herein before described being merely exemplary and explanatory embodiment thereof . it is the intention of the following claims to encompass and include such changes .