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EFFECT OF HIGH TEMPERATURE ON BOND BETWEEN STEEL REINFORCEMENT. The effect of elevated temperature on the bond strength between steel reinforcement and Fiber reinforced high strength concrete

Формат:      Страниц 100
     мягкая обложка
Raed A.    
Книга по Требованию    
1981 руб
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The results showed marked reductions in residual compressive, splitting and bond strengths of HSC under exposure temperatures. Cubes (100mm) cast from same mixture, cured, and heat-treated under similar conditions were also tested to evaluate compressive and splitting strength. Five different high strength concrete (HSC) mixtures (with and without fibers) were prepared using basalt aggregate at a w/c ratio of 0. 35. All specimens were cured for 28 days in a controlled temperature-water bath at a degree of 40 ? C. Then specimens were subjected to heating by an electrical furnace. Mixture incorporated H-steel fibers imparted the highest concrete-steel bond resistance against high temperatures This was represented by higher residual bond strength, and steel-bond ductility. Pullout specimens were tested under pullout to evaluate the bond behavior between steel reinforcement bars and surrounding concrete mixtures before and after heating. C is evaluated using prismatic double pullout (DP) specimens. Bond behavior between steel reinforcement and fibre reinforced concrete under elevated temperature of up to 700 ? DP concrete specimens with fibers showed better bond behavior than that of HSC.
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Механізм дії високого тиску і температури на деякі мікроорганізми та...
Resul s of work ca be used o op imize he se of parame ers of he high pressure processi g of produc s which give mai e a ce of s erili y of a produc a d preserve i s flavor quali ies wi h he mi imal expe ses of e ergy a d ime, a d also for developme of he high pressure processi g ech ology s a dards which are abse a he prese ime. Keywords: high pressure, i ac iva io , ki e ics, microorga isms, u foldi g, pro ei . АННОТАЦИЯНога И.В. Механизм действия высокого давления и температуры на некоторые микроорганизмы и витамины. – Рукопись. Диссертация на соискание ученой степени кандидата физико-математических наук по специальности 03.00.02 – биофизика. – Харьковский национальный университет имени В.Н. Каразина, Харьков, 2008. Работа посвящена научному обоснованию создания фундаментальных основ технологии стерилизации продуктов питания высоким давлением. С этой целью исследуются механизмы инактивации микроорганизмов и деградации витаминов под действием давления и температуры. Цель работы – экспериментально выявить основные закономерности и разработать физико-математические модели совместного действии на биосистемы факторов высокого давления, температуры и времени выдержки.

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This book analyses the advantages of SOI technology at high temperatures, the various leakage mechanisms and the stacked transistor approach to leakage reduction and also presents an overview of cell library design guidelines and timing characterization models.
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Chloride induced corrosion of steel reinforcement inside concrete. Use of half-cell potential to determine threshold chloride concentration for corrosion initiation Книга по Требованию G. M. S.I.
Reliability of chloride threshold level (CTL) assessment mostly depends on reliable detection of corrosion initiation of rebars.
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It has been established through experiments with Cu0. 5Tl0. 5Ba2Can-1-zMzCun-yZnyO2n+4-d (M=Mg, Be; n=3,4; y=0,1,2,3) systems that magnitude of superconductivity increases with enhanced carrier' s density. The fluctuation induced conductivity analysis of afore mentioned samples revealed that the coherence length and interlayer coupling J increases with Mg and Be doping. We have realized the Co-existence anti-ferromagnetism and superconductivity in oxide superconductors through the doping of Zn at the CuO2 planar sites. We have also established that Ferro-magnetism and superconductivity can also co-exist in oxide high temperature superconductors. This has been established by doping Ni and Fe at the CuO2 planar sites. For the studies of coexistance of antiferromagnetism , ferromagnetism and superconductivity, Zn and Ni are doped at the CuO2 planar sites in CuTl-based superconductors.
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The goal of the presented research is a systematic investigation of boron' s possible phase transformations under high pressure and temperature conditions. The major outcome of the study is the discovery of a new boron phase with 28 atoms in an orthorhombic unit cell. B28 exhibits striking physical properties. Its crystals are semiconducting and transparent in thin section. Because of its strong covalent bonding it has a high Vickers hardness of 58 GPa making it the second hardest elemental material after diamond. Combination of these properties makes the HP-B polymorph a prospective material for industrial applications. The book comprises description of experimental techniques employed for the study including HP, in-situ synthesis, powder and single crystal X-ray diffraction, spectroscopic and electron microscopic methods, and the theoretical basis of ab initio simulations involved in material characterization. Until recently the existence of only two boron modifications obtained at ambient pressure, ? - and ? -rhombohedral boron, seemed to be proven beyond doubt. Boron is known for its structural complexity, unusual type of bonding, and for a rich variety of compounds that it forms.
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High-chromium steel has been developed as a replacement for conventional steel in concrete because it may have a capability to retard the corrosion rate.
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Experimental, Numerical Investigation and Design High strength steel columns at elevated temperatures. Книга по Требованию Ju C.
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These studies may serve as first steps for a better understanding of the dynamics of heterotrophic flagellates on biofilm.
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They influences how lakes develop, because physical conditions, e. g. existence of ice cover, create basic settings for several processes in lakes.
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The chloride attack and increase in the electrochemical reaction rate of corrosion due to high temperature is an electrochemical thermodynamic phenomenon influenced by several factors and some of them are being overlooked in the past research works and have difference in opinion.
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Молочный гриб можно использовать для похудения, восстановления микрофлоры, очищения организмаМолочный гриб можно использовать для похудения, восстановления микрофлоры, очищения организма

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