High-quality concrete settle ...
One of the most important aspects of modern betonovedeniya - Video and improve a new generation of concrete that were in the world scientific community called High Performance Concrete. The emergence of such concrete has opened a new era in building. Concrete group characterized by high strength and corrosion resistance, waterproof and frost, adjustable deformativnostyu. This set features allow to implement using High Perfomance Concrete grandiose building projects such as bridge across the Akashi Strait in Japan (the length of the central span is 1990 m) tunnel under the English Channel, 125-storey skyscraper 610 m high in Chicago. High-quality concrete, provide a reliable high operational reliability parameters of buildings and structures in a complex environment and loads of action. Their use contributes to mean Yelnya reduce the construction period and reduce investment risks. All this is very seriously for insurance companies and other participants of the modern investment process. A wide range of scientists and specialists create effective materials and proven manufacturing techniques allowed in 1980-90-ies, using research, industrial installations and stands, as well as in industrial production to work out fundamentally new effective technological scheme gaining a new look with wide concrete range of performance due to variation in the appearance of a wide range of raw materials (tart and fillers), species, method and stage of introduction of chemical modifiers and active mineral additives, optimization of the composite concrete and focused management technology. In Russian betonovedeniyi a high-quality concrete understanding lehkoukladyvayemyye concrete hydraulic tart that combines high performance pr ochnosti (classes on the strength of compression - from 40 in to 90 in the corresponding marks on the strength of M600, M1200 and more) and the rate of curing (strength age days of natural curing - no less than 25-30 MPa) with appropriate indicators of construction and technical properties. What do these figures? It is waterproof W 12 and above, frost-F 400 and higher abrasion not more than 0,3-0,4 g/cm2, Water 1 - 2.5 mass%, and high resistance to penetration of chlorides and hazonepronyknist. In addition, this adjustable parameters deformativnosti (including compensation for shrinkage of concrete at the age of 14-28 Essentially. Natural curing). For the first time in Russian practice of construction have been received and applied and high early strength concrete with compressive strength up to 200 MPa, which combine high performance resistance (F 1000 and above) and waterproof (W 20 and over) with a stable volume and increased resistance to different aggressive actions and high decorative properties. Developed ourself concrete data specialists NIYIZHB with prytyahnenymy organizations. Here is what was developed during the period from 1985 to 1998 First, the theoretical basis of effective competition of high-quality concrete for various purposes and increase operational reliability through controlled structure at all stages of production through the use of composite astringent substances, the use of complex chemical modifiers and active mineral components. Secondly, polyfunctional chemical modifiers of concrete for various purposes (superplasticizer, plasticizers, curing controllers and concrete structure). Were optimized storage modifiers and conditions of use depending on the desired technical effect and way of introduction, including in the preparation of concrete mixtures and under get composite tart. Thirdly, the storage and use of technology for a wide range of active mineral components, including mikrokremnezemu that condensed and expand yayuschyh additives used as preparation for concrete mixtures and to obtain composite astringent and to reduce the clinker component costs, increase prochnostnyh characteristics and corrosion resistance of concrete, improve their water resistance and treschynostoykosti, compensation usadkovyh deformation processes of structure and regulation. Finally, the fourth, warehouses and technology competition composite tart. Named mehanohymicheskuyu technology involves the activation of components in the presence of polyfunctional modifiers and mineral supplements. The purpose of initiating this process is the addition of cement stone special properties - high strength (60 to 120 MPa), accelerated curing rates, high rates of resistance and sulfatostoykosti, and lack of shrinkage strain. High-quality concrete is widely used in the construction of monolithic and prefabricated monolithic special facilities, covering airports, runways, monolithic structures for space launch complex systems. The technology allows you to make the diversification of production and continue to produce socially significant products that will ensure the safety of buildings and structures, enhance their architectural expression. From 1985 to 1998 in the construction of various civil engineering and special equipment Russia with new concrete was produced and applied more than 1 million m2 prefabricated and monolithic reinforced concrete structures. The economic benefits of scientific experts and NIYIZHB prytyahnenyh organizations are such factors as lower materialomistkosti, reducing energy and labor, utilization of industrial wastes. The result of the significant increase in longevity is to increase the period of overhaul operation, and reduce operating costs associated with operation of buildings and structures, and conduct repairs. Today, its high, unprecedented display Telia operational reliability of concrete. In materials prepared NIYIZHB Sergei Zolotov