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.
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
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Книга по Требованию
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.
|Design of Low Leakage High Temperature Digital Cell Libraries. A Leakage Reduction Approach Using Stacked Transistors Книга по Требованию |
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.
|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.
|Zn and Ni Doped CuTl-Based High Temperature Superconductors. CuTl-Based High Tc Superconductors Книга по Требованию Dr. N.A.K. |
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.
|B28, a new high pressure high temperature boron allotrope. Synthesis, in-situ characterization, and physical properties Книга по Требованию Evgeniya Z. |
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.
|Isothermal Equation of state for solids. Under High Temperature and Pressure Книга по Требованию Dr. A.P. |
Various possible equation of states for solids (EOS) at high pressure and high temperature have been considered.
|Corrosion of High-Chromium and Conventional Steels in Concrete. Comaparative Study on Corrosion of High-Chromium versus Conventional Steels Embedded in Concrete Книга по Требованию Vijayakumar N. |
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.
|Experimental, Numerical Investigation and Design High strength steel columns at elevated temperatures. Книга по Требованию Ju C. |
The behaviour of high strength steel columns at elevated temperatures has been investigated using finite element method.
|UNDERSTANDING FACADE BETWEEN DESIGN AND MANUFACTURING. A CASE STUDY ON HIGH-RISE OFFICE BUILDINGS IN ISTANBUL Книга по Требованию DUYGU K. |
|Heterotrophic Flagellates on Biofilms. The Effect of Flow Velocity and Temperature on the Colonisation of Heterotrophic Flagellates Книга по Требованию |
These studies may serve as first steps for a better understanding of the dynamics of heterotrophic flagellates on biofilm.
|Effects of Climate and Morphology on Temperature Conditions of Lakes. Lake, Temperature, Ice, Climate, Morphology Книга по Требованию Aija-Riitta E. |
They influences how lakes develop, because physical conditions, e. g. existence of ice cover, create basic settings for several processes in lakes.
|DIRECT AND INDIRECT EFFECTS OF SELECTED FACTORS ON SCHOOL GRADES. IN PUBLIC HIGH SCHOOLS IN THE STATE OF FLORIDA Книга по Требованию Dr. J.M. |
|Toxicological Effects of Neem on the Squash Bug. Comparisons between Neem and other azadirachtin- containing compounds Книга по Требованию Onesimus O. |
Variables in the study include; feeding, mating behavior, ovoposition, molting, early-instar development and mortality in squash bugs.
|Analytical modeling of Fiber Metal Laminate stiffened by bonded straps. The effect of external stiffening elements on the fatigue crack growth in Fiber Metal Laminates Книга по Требованию Riccardo R. |
The main concept in this work is that the effect of external stiffening elements can be described with the superimposition principle, independently of the geometrical disposition of the stiffeners.
|Corrosion of RC Structures Under Severe Environmental Actions. Multiscale Electrochemical Corrosion Modeling of Steel Embedded in Chloride Contaminated Concrete Under Elevated Temperature Conditions Книга по Требованию Raja R.H. |
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.
|A Methodology to Predict Fatigue Life of High-Strength Steels Uniform Material Law: Extension to High-Strength Steels. Книга по Требованию Sinan K. |
In contrast to other available methods, UML is a handy method as only tensile strength data of metals are needed for estimation of the strain-life curves.
|Effects of Extrusion Process Conditions on "Die Pick-Up". Extrusion Temperature and Extrusion Speed Книга по Требованию Robbie P. |
The highest exit temperature increased from 542°C to 567°C when the extrusion speed was increased from 25m/min to 45m/min.
|Steel and Steel-Concrete Composite Structures at Elevated Temperatures. Behaviour of Beams and Beam-to-Column Connections Книга по Требованию Amin H. |
Developing a formulation representing the mechanics of the potential failure zone in the column web in the compression region of the connection due to the large compressive forces developed during fire, predicting the critical temperature in a connection that causes failure of the bolts, end plate and column flange in the tension zone of the connection and elastic analysis of a panel zone in a rigid or semi-rigid joint in a steel frame, are presented in this book.
|EFFECTS OF HUMAN RIGHTS EDUCATION ON THE BEHAVIOUR OF STUDENTS' IN THE SENIOR HIGH SCHOOLS IN THE CAPE COAST METROPOLIS. CENTRAL REGION, GHANA HUMAN RIGHTS EDUCATION - EFFECTS IN SENIOR HIGH SCHOOLS IN GHANA. Книга по Требованию EBENEZER A. |
This is a book for researchers, teachers, parents, human rights activists, education and school authorities.
|The effect of adding spiral reinforcing to vertically reinforced concrete columns Книга по Требованию Kann W. |
Несмотря на то, что была проведена серьезная работа по восстановлению первоначального качества издания, на некоторых страницах могут обнаружиться небольшие "огрехи": помарки, кляксы и т. п. Книга представляет собой репринтное издание.
|A Study of the Relationship Between Crops Prices and Ethanol Production Maize and Sugar Prices: The Effects on Ethanol Production. Книга по Требованию Federico P.P. |
Alternative fuels are being promoted globally as the increasing gasoline prices trigger inflation.