The article reveals the problem of unreasonable overestimation of the durability of roofs made of polymer membranes, which was allowed during their mass introduction in our country in construction and repair and construction production. The article contains a description and illustrations of characteristic cracks that have arisen on a large area of the membrane roof, which have brought it into an inoperative state. The article provides a comprehensive analysis of the causes of the origin of these cracks, including the influence of the design features of membrane roofs, the aggressive effect of solar radiation and large hail on them. It is concluded that it is necessary to choose more UV-resistant polymer roofing membranes.
Keywords: construction, building, membrane roof, polymer membrane, durability, aggressive effects, hail, damage, cracks, inoperable condition
Abstract: field application of lignosulfonate as a chemical additive for use in gypsum compositions. The influence of lignosulfonate on the physical and mechanical properties of pigmented plaster. The work studied the effect of lignosulfonate on properties of gypsum as strength properties, water absorption, softening coefficient and the changing colors of the material. Established that the application of lignosulfonate to a considerable extent not only improves the physico-mechanical properties of the material, but also its operational durability of pigmented gypsum, which expands the scope of these materials.
Keywords: lignosulfonate, pigmented plaster, physico-mechanical properties, strength properties, water absorption, coefficient of softening, change of color, long service life
Abstract: Among the variety of modern mineral binders occupy a special place gypsum binder, which has many positive properties: efficiency of production in comparison with cement, quick hardening, architectural expressiveness of features with the use of pigments, abundance of raw materials and high technology. However, its application is limited by low resistance of the material. The paper presents a brief analysis of the main methods of improving the water resistance developed at the moment in construction: increasing the density of products, improvement of water resistance by impregnating the surface of various materials, the use of various chemical additives, a decrease in the solubility in water of calcium sulphate, the use of combined methods of improving the water resistance, the creation of composite
Keywords: Keywords: gypsum binders, improvement of water resistance, impregnation, chemical additives, composite materials.
Abstract: the main applications of pigments in the building and abroad. This paper studied the influence of pigments on the physico-mechanical properties of gypsum - strength properties, water absorption, softening coefficient and the capillary suction material. It is established that one of the important characteristics of gypsum composite is a capillary suction material, which determines to a considerable extent not only the physico-mechanical properties of the material, but also its operational durability.
Keywords: Key words: pigments, physico-mechanical properties, strength properties, water absorption, softening coefficient, capillary leak, long service life
Abstract. In the article it is proposed to use flexible surface heating elements Tami in various sectors of the economy: when you heat various materials and products, the heating of concrete in winter time, the heat treatment of the roof during its repair, and disinfection of the soil in greenhouses and greenhouses. Optimal and cost-effective modes of application of Tamou. Shows practical applications of the heating elements. The most effective use of the heating elements when they are combined with different methods or materials for a particular use.
Keywords: Key words Flexible surface heating elements, heated various materials, concrete heating, heat treatment of roofs, disinfection of the soil
The article discusses the use of surface mats for thermoelectric heat treatment of concrete in the winter and complex additives. At the same destructive processes in the material does not occur and reduced thermal treatment.
Keywords: сoncrete thermoelectric mats complex chemical additives, heat treatment