On concrete and mortars

March 12 in the framework of the international exhibition "Stroyimpeks-98. Furniture-98 "Minsk Ltd. Farbeks, which represents the interests of Belarus in the Czech LLC Stahema Colin, and laboratory modified concrete BHPA was organized and conducted a seminar on" the use of additives produced Ltd. Stahema Colin "in the manufacture of concrete and concrete products and structures. Director, "Farbeks" In. N. Rachevskyy presented concerned the audience consisted mostly of Belarusian builders and manufacturers of building materials, products and structures, the head of the Laboratory of modified concrete BHPA N. L. Poleyko and Senior Scientist Laboratory A. A. Drozd and deputy director of the Stahema Colin "Marketing V. Chizhek and technology firms I. Fiedler. - We work with Stahemoy has about six months - said N. L. Poleyko - and this time bibliotecarul D supplements was developed by the company directly at our laboratory: we have already experienced. The meaning and our work together, and this workshop is that we continue vyprobovuvatymemo additives that you invite, and give you recommendations in our laboratories accredited for testing concrete and concrete mixes. We not only tempt chemical additives, but also develop all kinds of technology selection structure concrete production vibropresovanyh concrete products. - All Manufactured firm Stahema "additives, - said I. Fiedler - can be subdivided into the following groups: plastifikatsyonnyye, and Air Entraining vozduhottalkyvayuschye and materials for repair of concrete and additives that affect the speed of their setting.

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RFID (Radio Frequency Identification - RFID) - a method of automatic identification of objects is that using radio prochytuyutsya or recorded data stored in the so-called transponders, or RFID-string. Any RFID-system consists of prochytuyuchoho device (schytyvatel, interrohator or reader) and transponder (he RFID-string, sometimes also uses the term RFID-tag). Most RFID-metok consist of two parts. First - integrated circuit (IC) for storing and processing, modulation and demodulyuvannya frequency (RF) signal and some other functions. Second - antenna for reception and transmission signal. Already the application RFID (contactless smart cards in the systems access control and payment systems) are more popular with the development of Internet services. Recently experts of International Coding Technologies, Inc. (ICT) have developed a wireless RFID-device for use in the concrete industry. This solution minimizes the critical road network schedules Manufacturing and inventory management processes and is based on the use of RFID-metok from UPM Raflatac (one of the leading suppliers of materials that samokleyaschyhsya and manufacturer of radio frequency identification tags).

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Microspheres are in close interaction with the products of hydrolysis and hydration of cement and act as an element that structures, shows putstsolanicheskuyu activity. Microspheres lighter and smaller, so repel the charge share the same name in cement can not. Products of hydrolysis of cement - lime aluminates and hydroalyuminaty, hydroferrity - have a positive charge. Therefore, they attract microspheres and attract them. Roztashovuyuchys intergranular openings in the space, products of hydrolysis with microspheres form a complex. They seal intergranular openings space and time porizuyut it through hollow microspheres. From the works of Russian and foreign scientists known plastyfikuyuchyh additive effect on the structure and properties of cement materials. Introduction of such additives to mix with equal mobility to lower V / C, Ulu chshyt structure and properties of the material. To obtain a cement material with homogeneous structure to overcome the superficial power microspheres or shield. This used microspheres apretuyut, SP S-3, as well as natural factors - a mountain of pressure and temperature in the borehole. Ordinary cement Tube umbrella microspheres in solution and create a more diverse structure of stone with thick contact layer around tumors PSMS. Moreover, the decrease in average density below 1.08 g/cm3 solution is impossible due to poverty (vodootdeleniye more than 5%). We had to change and modify the structure of the material, produce the components of choice and its optimization. Moreover, determining the efficiency criterion is the average density modification solution, equal to 1 g/cm3. After its reduction below this value, putting additives (apretu JV and C-3) reduces the average density of the mixture by reducing vodopotreby. In such cases, the water took place microspheres density are nearly 4 times Mensheviks Shea than in water. This decreases the distance between the microspheres and the volume fraction of cement matrix. Increasing number of microspheres in this case enhances uniformity of cement stone. Modified materials with MS at same rastekayemosti exceed normal levels of expenditure in the microspheres for all considered parameters (tablytsya. 5 and 6). They have lower water absorption, higher prochnostnyye performance, especially when stretching bend. Sealing structure of the material, which is reflected in the reduction of the size now. Apret and superplasticizer adsorbs on smaller and, consequently, the active microspheres and tumors. This brings to an optimal structure formation, since no formation of inhomogeneous structures in mezhmikrosfernom space. With all kinds of tests lightweight stone with additives apretu and SP S-3 showed better properties than usual, by sealing the structure (tablytsya. 4 and 5). In forming a modified tampon zhnoho lightweight cement stone with PSMS or APSMS under conditions that simulate the conditions well, its properties are considerably improved. This is due to more uniform distribution of cement hydration products, overcoming surface forces microspheres and their activity under pressure. First developed by the insulating tube umbrella storage materials that can simultaneously be both passive insulation and tube umbrella solution, and then - and stone.

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Currently the world is building a new generation of concrete that can produce sophisticated heavy-duty construction with high performance properties. High-quality concrete usually vary a great frost, extremely high strength and low water-resistance. This provides increased durability of structures in complex operating environments. All these figures practically implemented without the use of high quality, specially synthesized chemical modifiers. Writing in concrete and mortar additives has created a real prerequisite for obtaining high-quality concrete and mortar high durability. Company Benoteh (Novosibirsk) worked in construction for concrete additives and mixtures of solutions and is the manufacturer and the official dealer of several companies in the manufacture of additives for concrete and mortar mixes them. Knowing how important today, the cost of construction products, the company provides essential economic component of building additions in concrete and mortar. Universal Supplements KMH (mineral complex chemical additive) Apply KMH recommended for concrete with high requirements on resistance, strength and water resistance. The additive provides full waterproof concrete, moreover, increases the strength (150%) and frost resistance (over 500 cycles). Fuel additives is 1,5-3% on a dry matter weight of cement. The additive is introduced together with dry komponentami, mixed in mishaltsi coercive action (mixing time should increase to 20%), then water is added zachynnennya (flow zachynnennya to reduce 35-40%). At the same concrete strength increases by 80-100%, the latter characteristics are as follows: mobility - IV group (21-24 cm), sedimentation to onusa - 19 cm, frost - 1000 cycles, water resistance - from 16 to 20. In all cases sohranyayemost mobility concrete mixture is 80-110 minutes.

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Corrosion protection of steel and concrete building structures exploited in land, groundwater, surface and underwater (including marine) conditions, is crucial for the durability of constructions. For example, the depreciation of technological equipment used in the petrochemical industry depends on such factors as the degree of external corrosion resistance, resistance to internal chemical action, resistance to abrasion and thermal loads. Low rates for these positions caused by an unscheduled shutdown of production facilities and costly repairs or replacement reactors and pipelines, ship equipment and chemicals storage tanks, the danger of accidents and pollution. Trading Program in Moscow company TempStroySystema "includes, among other things, anti-corrosion system Anticosys series 2000, 3000 and 4000 productions of the French Chemical Corporation Socom. These systems help to solve similar problems with a high degree of reliability. Corrosion of Antycosys, owning a unique ratio of price / quality, allow for the repair and protection of equipment and different structures exploited in terrestrial and marine environments.

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