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Advanced Asphalt Materials and Paving Technologies

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ISBN: 9783038428893 9783038428909 Year: Pages: VIII, 422 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: General and Civil Engineering
Added to DOAB on : 2018-05-04 14:22:16
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There has been significant research progress in the area of pavement materials and paving technologies in the past decade. This includes the use of warm mix asphalt technologies, rubber asphalt, bio asphalt, nanomaterial applications, new construction technologies, innovative concrete materials, as well as the application of mechanistic–empirical pavement design. With all these developments, a collection of peer-reviewed articles with the theme of advanced asphalt materials and paving technologies is necessary for industry, researchers, government agencies, and other stakeholders. This collection promotes new technology, low costs, high durability, environmental friendliness, and effective resource usage in the area of advanced asphalt materials and paving technologies.

Influence of elevated temperatures up to 100 °C on the mechanical properties of concrete

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Book Series: Karlsruher Reihe Massivbau, Baustofftechnologie, Materialprüfung / Institut für Massivbau und Baustofftechnologie ; Materialprüfungs- und Forschungsanstalt Karlsruhe ISSN: 1869912X ISBN: 9783731507956 Year: Volume: 84 Pages: X, 240 p. DOI: 10.5445/KSP/1000082992 Language: ENGLISH
Publisher: KIT Scientific Publishing
Subject: General and Civil Engineering
Added to DOAB on : 2019-07-28 18:37:01
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Experiments to characterize the effects of moisture content and temperature on the mechanical properties of concrete were conducted. Based on these experiments, a new overall material model capable of predicting the mechanical behaviour of concrete subject to elevated temperatures up to 100 °C was developed. The material model estimates the time, temperature and moisture dependency of the compressive and tensile strength, creep and shrinkage of concrete.

Zur Vorhersage des Schwindens und Kriechens von normal- und hochfestem Konstruktionsleichtbeton mit Blähtongesteinskörnung

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Book Series: Karlsruher Reihe Massivbau, Baustofftechnologie, Materialprüfung / Institut für Massivbau und Baustofftechnologie ; Materialprüfungs- und Forschungsanstalt Karlsruhe ISSN: 1869912X ISBN: 9783731505211 Year: Volume: 80 Pages: Getr. Zählung DOI: 10.5445/KSP/1000054333 Language: GERMAN
Publisher: KIT Scientific Publishing
Subject: General and Civil Engineering
Added to DOAB on : 2019-07-30 20:02:00
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While the present state of knowledge on the time dependent deformation behaviour of normal and high-strength concrete may be considered as sufficiently determined, the creep and shrinkage of lightweight aggregate (LWA) concrete, particularly of high-strength LWA concrete, can only be specified inadequately. On the basis of the experimental results a prediction model for shrinkage and creep of structural lightweight aggregate concrete was developed.

Experimentelle Untersuchungen und Bemessungsansätze für faserverstärktes Mauerwerk unter Erdbebenbeanspruchungen

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Book Series: Karlsruher Reihe Massivbau, Baustofftechnologie, Materialprüfung / Institut für Massivbau und Baustofftechnologie ; Materialprüfungs- und Forschungsanstalt Karlsruhe ISSN: 1869912X ISBN: 9783731503729 Year: Volume: 76 Pages: IX, 301 p. DOI: 10.5445/KSP/1000046876 Language: GERMAN
Publisher: KIT Scientific Publishing
Subject: General and Civil Engineering
Added to DOAB on : 2019-07-30 20:02:00
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Several experimental campaigns are conducted to find feasible fiber reinforcements for buildings under earthquake conditions. Therefore tensile tests for the description of the bonding behavior of the fibers, shear tests on three-stone small specimen, small static cyclic shear wall tests, bending tests of wall segments, large format dynamically loaded wall plates and five building experiments were performed under realistic time history acceleration. At the end a calculation method is proposed.

High Performance Concrete Technology and Applications

Authors: ---
ISBN: 9789535126508 9789535126515 Year: Pages: 214 DOI: 10.5772/61562 Language: English
Publisher: IntechOpen
Subject: Construction
Added to DOAB on : 2019-10-03 07:51:49

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Concrete is widely used because of its versatility, affordability, and availability of raw materials, strength, and durability. Urban development that took place through the world in the last few decades yielded significant developments for concrete technology. The term high-performance concrete (HPC) is relatively new, and it refers to many properties such as strength, durability, sound and heat insulation, waterproofing, and side advantages such as air purification, self-cleaning, etc. Researchers and engineers are constantly working for improving concrete properties. This book provides the state of the art on recent progress in the high-performance concrete applications written by researchers and experts of the field. The book should be useful to graduate students, researchers, and practicing engineers in related fields.

New Trends in Recycled Aggregate Concrete

Authors: --- ---
ISBN: 9783039211401 9783039211418 Year: Pages: 280 DOI: 10.3390/books978-3-03921-141-8 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- General and Civil Engineering
Added to DOAB on : 2019-08-28 11:21:27
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This book is the result of a Special Issue published in Applied Sciences, entitled “New Trends in Recycled Aggregate Concrete"". It identifies emerging research areas within the field of recycled aggregate concrete and contributes to the increased use of this eco-efficient material.Its contents are organised in the following sections: Upscaling the use of recycled aggregate concrete in structural design; Large scale applications of recycled aggregate concrete; Long-term behaviour of recycled aggregate concrete; Performance of recycled aggregate concrete in very aggressive environments; Reliability of recycled aggregate concrete structures; Life cycle assessment of recycled aggregate concrete; New applications of recycled aggregate concrete.

Keywords

reactive power concrete --- shrinkage --- creep --- steel fibre --- model --- compressive strength --- models --- geological nature of aggregates --- quality of aggregates --- concrete --- recycled aggregates --- seismic load --- strain rate --- fiber-reinforced concrete --- dynamic mechanical property --- recycled aggregate quality --- bond strength --- shear behavior --- aggregate interlock mechanism --- size effect --- ready-mixed concrete --- recycled concrete aggregates --- returned concrete --- concrete sludge fines --- soil stabilization --- recycled aggregate --- recycled aggregate concrete --- artificial neural networks --- aggregate characteristic --- input variable --- recycled concrete --- aggregate --- mixture proportioning --- flexural behavior --- recycling --- heavyweight waste glass --- cyclic load --- reinforced concrete member --- recycled aggregate concrete (RAC) --- steel reinforced recycled aggregate concrete (SRRAC) --- elevated temperature --- residual properties --- recycled coarse aggregate concrete --- nylon fiber --- mechanical properties --- permeability --- microstructure --- foam concrete --- cellular concrete --- ceramic foam --- modulus --- crushing --- energy absorbing --- CT --- foam structure --- foam stability --- recycled aggregate --- concrete --- life cycle assessment --- environmental impact --- recycled concrete aggregate --- crumb rubber --- crushed glass --- compressive strength --- tensile splitting strength --- water absorption --- concrete --- aggregates --- fly-ash --- silica fume --- blast-furnace slag --- mechanical properties --- water absorption --- reinforced concrete --- recycled aggregate concrete --- columns --- seismic performance --- numerical analysis --- variable sensitivity --- recycled aggregate --- concrete --- construction waste --- mechanical characteristics --- durable characteristics --- n/a

Beitrag zur Vorbemessung der Biegeverstärkung von Stahlbetonbauteilen mit Rechteckquerschnitt mittels aufgeklebten CFK-Lamellen

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ISBN: 9783966270021 9783966270038 9783966270007 9783966270014 Year: Pages: 252 DOI: 10.33968/9783966270021-00 Language: German
Publisher: HTWK Leipzig - OA-Hochschulverlag
Subject: Agriculture (General)
Added to DOAB on : 2020-02-12 11:21:04
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"Since 2012, the subsequent reinforcement of reinforced concrete components with bonded reinforcement has been regulated in a separate guideline. This includes the dimensioning of the adhesively bonded strips made of carbon fiber reinforced plastic (CFRP), which, in addition to the complex iterative bending design, have a very complex bonding behavior. For this purpose, the German Committee for Structural Concrete developed a model for the verification based on experimental evaluations, in which the occurring tensile forces are partly transferred into the component via intermediate elements (partial distances between flexural cracks). Simultaneously, simplified but more inaccurate verification formats were made available to reduce the complexity of the verification. For an early assessment of the use of bonded CFRP strips, different tools have been developed in this paper for reinforced concrete components with a rectangular cross-section depending on the different verification formats. For this purpose, the design parameters were considered separately for pure bending strength and bonding behavior. For a simple calculation, tables for the design with dimensionless coefficients were obtained by analogy with the reinforced concrete construction, with which the required cross-section area for the CFRP strips can be determined by means of a limited stretching from the simplified verification of the flexural load bearing capacity. For a more economical solution, the more precise verification of the force transmission on the intermediate elements was configured in an Excel workbook, because this results in an extraordinary iterative calculation effort."

Schädigungsmodell für die Hydroabrasionsbeanspruchung zur probabilistischen Lebensdauerprognose von Betonoberflächen im Wasserbau

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Book Series: Karlsruher Reihe Massivbau, Baustofftechnologie, Materialprüfung / Institut für Massivbau und Baustofftechnologie ; Materialprüfungs- und Forschungsanstalt Karlsruhe ISSN: 1869912X ISBN: 9783731505228 Year: Volume: 81 Pages: Getr. Zählung DOI: 10.5445/KSP/1000054428 Language: GERMAN
Publisher: KIT Scientific Publishing
Subject: General and Civil Engineering
Added to DOAB on : 2019-07-30 20:01:59
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Hydraulic structures are exposed to multifaceted exposures. Particular the hydro-abrasive wear of the concrete edge zones represents a key exposure. The knowledge about the abrasive mechanisms of concrete and its degradation process is still insufficient. Relating to the hydro-abrasive test method, the relevant material parameter and degradation model incomplete knowledge existed which was removed.

Textile Reinforced Cement Composites: New Insights in Structural and Material Engineering

Authors: ---
ISBN: 9783039283309 9783039283316 Year: Pages: 284 DOI: 10.3390/books978-3-03928-331-6 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- General and Civil Engineering
Added to DOAB on : 2020-04-07 23:07:08
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This Special Issue presents the latest advances in the field of Textile-Reinforced Cement Composites, including Textile-Reinforced Concrete (TRC), Textile-Reinforced Mortar (TRM), Fabric-Reinforced Cementitious Matrix (FRCM), etc. These composite materials distinguish themselves from other fibre-reinforced concrete materials by their strain-hardening behaviour under tensile loading. This Special Issue is composed of 14 papers covering new insights in structural and material engineering. The papers include investigations on the level of the fibre reinforcement system as well as on the level of the composites, investigating their impact and fatigue behaviour, durability and fire behaviour. Both the strengthening of existing structures and the development of new structural systems such as lightweight sandwich systems are presented, and analysis and design methods are discussed. This Special Issue demonstrates the broadness and intensity of the ongoing advancements in the field of Textile-Reinforced Cement composites and the importance of several future research directions.

Keywords

textile reinforced concrete --- cathodic corrosion protection --- durability --- bending tests --- fire --- high temperature --- textile coating --- textile reinforced cementitious composites (TRC) --- finite element model --- real scale bending experiments --- shear --- structural insulating sandwich panel --- textile reinforced cementitious composites (TRC), sandwich elements --- fatigue --- uniaxial tensile tests --- four-point bending tests --- digital image correlation (DIC) --- textile reinforced concrete (TRC) --- strengthening --- bending --- model --- design --- practical application --- shear --- textile-reinforced concrete --- carbon concrete composite --- design provisions --- size effect --- shear span --- textile reinforced concrete --- TRC --- fabric reinforced cementitious mortar --- FRCM --- glass fabric --- high performance concrete --- retrofitting --- ACK model --- stochastic cracking model --- alkaline environment --- carbon-reinforced concrete --- creep --- durability --- moisture --- tensile strength --- textile reinforced concrete --- textile reinforced concrete --- carbon reinforced concrete --- TRC --- CRC --- bond --- fatigue --- carbon textile --- epoxy impregnation --- test setup --- textile reinforced mortar --- bond --- masonry --- normal weight/lightweight aggregates --- elevated temperatures --- fiber-reinforced concrete --- crack spacing --- fiber --- micro-fiber --- tensile strength --- toughness --- textile-reinforced concrete --- thin-walled shells --- cementitious composites --- layered finite elements --- mixture rules --- model calibration --- reactive powder concrete (RPC) --- textile reinforced concrete (TRC) --- foam concrete (FC) --- sandwich elements --- wind loading --- finite element analysis (FEA) --- strain-hardening cement-based composites --- textile reinforcement --- short-fiber reinforcement --- hybrid reinforcement --- tension --- impact loading --- single-yarn pullout --- cement composites --- fibre --- textile --- textile-reinforced concrete --- textile-reinforced mortar

Non-destructive Testing of Materials in Civil Engineering

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ISBN: 9783039216901 9783039216918 Year: Pages: 448 DOI: 10.3390/books978-3-03921-691-8 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- General and Civil Engineering
Added to DOAB on : 2019-12-09 11:49:16
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This book was proposed and organized as a means to present recent developments in the field of nondestructive testing of materials in civil engineering. For this reason, the articles highlighted in this editorial relate to different aspects of nondestructive testing of different materials in civil engineering—from building materials to building structures. The current trend in the development of nondestructive testing of materials in civil engineering is mainly concerned with the detection of flaws and defects in concrete elements and structures, and acoustic methods predominate in this field. As in medicine, the trend is towards designing test equipment that allows one to obtain a picture of the inside of the tested element and materials. From this point of view, interesting results with significance for building practices have been obtained

Keywords

non-destructive testing --- masonry structures --- strengthening --- ultrasonic tomography --- adhesion assessment --- autoclaved aerated concrete (AAC) --- compressive strength --- shape and size of specimen --- moisture of AAC --- ultrasonic testing --- gantry crane --- RMF technique --- civil engineering --- fibre-cement boards --- non-destructive testing --- acoustic emission --- degree of degradation --- thermovision --- active thermography --- thermal contrast --- defect detection --- location of inclusions --- non-destructive testing --- materials research --- building partition --- cement-based composites --- fiber cement boards --- durability --- ultrasound measurements --- spun concrete --- micro-computed tomography --- nanoindentation --- deconvolution --- mathematical morphology --- non-destructive evaluation --- structural damage --- natural frequency --- singular value truncation --- multiple feedbacks --- data noise --- NDT methods --- rebar location --- eddy-current method --- GPR method --- concrete --- concrete mix design --- concrete strength prediction --- data mining --- machine learning --- timber structures --- non-destructive methods --- ultrasonic wave --- stress wave --- drilling resistance --- X-ray micro-computed tomography --- waste brick dust --- adsorption --- lead --- cesium --- surface complexation --- precipitation --- solid-state NMR spectroscopy --- Lamb waves --- scanning laser vibrometry --- adhesive joints --- non-destructive testing --- damage detection --- excitation frequency --- nondestructive testing --- thermography --- monitoring of structures --- reinforced concrete chimney --- corrosion processes --- service life of a structure --- viscoelastic parameters --- creep test --- fatigue tests --- asphalt mixtures --- Burgers model --- four point bending beam --- pattern recognition --- acoustic emission --- Structural Health Monitoring --- brittle fracture --- diagnostics --- non-destructive testing --- reinforced concrete grandstand stadium --- vibration analysis --- crowd-induced excitation --- structural tuning --- concrete slabs and floorings --- horizontal casting --- compressive strength --- ultrasonic tests --- fibre-cement boards --- non-destructive testing --- acoustic emission --- artificial neural networks --- SEM --- non-destructive method --- damage --- mercury intrusion porosimetry --- X-ray computed tomography --- acoustic emission AE --- acoustic spectrum --- quasi brittle cement composites --- destruction process --- resistance measurement --- wood moisture sensing --- non-destructive testing --- moisture safety --- cellulose fibre cement boards --- microstructure --- nanoindentation --- SEM-EDS analysis --- temperature --- concrete elements --- concrete strength --- reinforced concrete tanks --- concrete corrosion --- sulphate corrosion --- ultrasound tests --- rebound hammer --- SilverSchmidt --- concrete --- compressive strength --- non-destructive testing --- non-destructive testing --- diagnostic --- acoustic methods --- ultrasound --- building materials --- defects

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