Increasingly, instead of all the usual mixture of sand and cement, which is prepared immediately before dosing and which are "by eye", the builders began to use it dry mixes, produced in industrial conditions. The benefits and advantages does the use of dry mixes in the building: saving time and place – eliminating the need for acquisition, storage and blending of all components in the composite Ability to produce the proportions of a mixture of any complexity on order – due to flexibility of the production process for process equipment in Europe No loss of quality – a solution can be prepared in necessary at this point amounts Saving transportation costs – the use of dry mixes eliminates constant supply to the building site ready solution, which drastically reduces transportation costs Guarantee high quality – the right recipe at the expense of accurate dosage of components (quality of ready-mix compares to cooked on the spot) What is a dry mix? Current dry mixes it – multicomponent formulations, which in addition to the mineral binder and filler present complex chemical additives regulating the speed of setting and hardening binders, and provide the necessary physical and mechanical properties of the solution after solidification. The most commonly referred to as dry mixes simple sand-cement mixture (sometimes they add lime, ground limestone, ash, thermal power plants) marks 100 and 150, put up in Kraft bags and used for masonry and plastering work. In such mixtures, using screened out of coarse grains and dried sand, which provides long-term storage and simplifies the preparation of mortar. But in modern sense of the term "dry blend" to such free-flowing compositions can be applied fairly conventional. Composition of dry mixes in any of the dry mixture includes: binder (cement, gypsum and lime or combination), neutral fillers to provide the optimum amount (usually a sand), and special modifying additives, which give the necessary properties of the mixture.