Dry mixes in modern construction using local raw materials and polymer additives

Abstract

The article shows the results of studies of dry building mixes (DBM), their strength properties, classification, components of DBM, also shows the technological scheme for obtaining polymer cement glue using DBM technology and the dependence of the cohesive strength of polymer cement glue on the duration of mixing of DBM with water. The dependence of the cohesive strength of the polymer cement adhesive (PCA) on the specific surface of the sand, the dependence of the cohesive strength of the PCA on the content of the polymer additive and the dependence of the cohesive strength of the PCA on the content of the catalyst are also shown. As a result, the conducted studies have shown that the maximum strength is achieved with a specific surface area of mineral filler (sand) 2000 cm2 / g, polymer additive –5%, and NaOH catalyst -4%. The article also presents the goals of the technology of using dry mixes, trends determining the development of the mineral building materials industry, rational use and creation of new types of building materials more efficient and cheaper than traditional ones. In addition, the use of local raw materials and waste from various industries in the production of building materials is an important area of resource and energy conservation in the technology of construction production. And of course, dry mixes, in comparison with commercial mortar and concrete compositions, have a number of advantages, such as performing a minimum of finishing technological operations to transfer dry mixes to working condition (sealing with water), saving expensive cement (by 10-15%) due to plasticization and water retention of prepared solutions, stability of dry mix compositions in as a result of the precise dosage of components and their effective mixing, the productivity of builders increased by 20-25%, by improving the plastic properties of the prepared solutions and reducing transport costs by 15%.