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Effect of embedment length of untreated natural fibres on the bond behaviour in cement mortar

Gudimella RAMAKRISHNA, Sriraman PRIYADHARSHINI

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 4,   Pages 454-460 doi: 10.1007/s11709-017-0454-2

Abstract: effects of various matrices with 1:3, 1:4 and 1:5 mortars and fibre types of sisal and coir on the bondFrom the results, it is seen that the bond strength is improving with respect to age of curing in casesuch as mortar mixes, sand gradation, w/c ratio and embedded length also showed significant effect on bond

Keywords： bond strength     cement mortar     natural fibre     pullout test     type of failure    

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Study of bond strength between various grade of Ordinary Portland Cement (OPC) and Portland Pozzolane

A D POFALE, S P WANJARI

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 1,   Pages 39-45 doi: 10.1007/s11709-013-0193-y

Abstract: But, till to date, a few literature is available on bond strength of concrete using PPC mixes.There are many literatures available on bond strength of concrete mixes using Ordinary Portland CementHence, a comparative study was conducted on bond strength between OPC and PPC mixes.It was observed that the critical bond strength of PPC mixes is 10% higher than OPC mixes.Whereas, marginal improvement was noticed in maximum bond strength of PPC mixes.

Keywords： bond strength     Portland Pozzolane Cement (PPC) concrete     Ordinary Portland Cement (OPC) concrete     bond between    

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Shear strength model of the reinforced concrete beams with embedded through-section strengthening bars

Linh Van Hong BUI; Phuoc Trong NGUYEN

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 7,   Pages 843-857 doi: 10.1007/s11709-022-0834-0

Abstract: Effects of critical variables on the beam shear strength, including the compressive strength of concreteA promising method based on the bond mechanism between ETS strengthening and concrete is then proposedAn expression for the maximum bond stress of the ETS bars to concrete is developed.This new expression eliminates the difficulty in the search and selection of appropriate bond parametersobtained from this study can also serve researchers and engineers in selection of the proper shear strength

Keywords： embedded through-section     strengthening     fiber-reinforced polymer     finite element     shear strength model     bond mechanism    

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Calculation of Bond-length, Bond-energy and Force Constant of Hydrogen Molecule by Classical Mechanics

Chen Jing

Strategic Study of CAE 2003, Volume 5, Issue 6,   Pages 39-43

Abstract: molecule structural parameters are calculated with the classical mechanics, and the hydrogen molecule bond-length

Keywords： hydrogen molecule     bond-length     bond-energy     force constant    

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Effect of noble metal nanoparticle size on C–N bond cleavage performance in hydrodenitrogenation: a study

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 12,   Pages 1986-2000 doi: 10.1007/s11705-023-2337-5

Abstract: Breakage of the C–N bond is a structure sensitive process, and the catalyst size significantly affectsOn the active metal nanoparticle scale, the role of catalyst size in C–N bond cleavage has not been clearlyResults showed a 13 times higher reaction rate for sp3-hybridized C–N bond cleavage than sp2-hybridized C–N bond cleavage, while the reaction rate tended to increase first and thencleavage activity, and the step atoms are the active sites for the C–N bond cleavage.

Keywords： sp3/sp2-hybridized C–N bond     noble metal nanoparticle     catalytic active site     turnover    

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The effect of carbon nanotubes and polypropylene fibers on bond of reinforcing bars in strain resilient

Souzana P. TASTANI,Maria S. KONSTA-GDOUTOS,Stavroula J. PANTAZOPOULOU,Victor BALOPOULOS

Frontiers of Structural and Civil Engineering 2016, Volume 10, Issue 2,   Pages 214-223 doi: 10.1007/s11709-016-0332-3

Abstract: Owing to concrete’s poor tensile properties in terms of strength and deformability, the equilibrium isstrength.Any improvement of the matrix tensile properties is expected to favorably affect bond in terms of strengthand CNTs in the matrix, namely the maintenance of the multi-cracking effect with time, the increased strengthstrength up to large levels of controlled bar-slip; the elasto-plastic bond response envelope was a

Keywords： carbon nanotubes     strain resilient cementitious composite     polypropylene fibers     tensile bending     bond    

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Effect of bond enhancement using carbon nanotubes on flexural behavior of RC beams strengthened with

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 1,   Pages 131-143 doi: 10.1007/s11709-021-0787-8

Abstract: The studied parameters included concrete strength, flexural reinforcement ratio, and CFRP sheet configurationwith CNTs-modified CFRP decreased with increasing the rebar diameter and was not affected by concrete strength

Keywords： RC beams     flexural     strengthening     CFRP     CNTs     finite element    

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Controllable synthesis of a large TS-1 catalyst for clean epoxidation of a C=C double bond under mild

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 6,   Pages 772-783 doi: 10.1007/s11705-022-2280-x

Abstract: Development of a titanium silicalite-1 (TS-1) catalyst with good crystallinity and a four-coordinate Ti framework is critical for efficient catalytic oxidation reaction under mild conditions. Herein, a size-controlled TS-1 zeolite (TS-1#0.1ACh (acetylcholine)) was synthesized via steam-assisted crystallization by introducing acetylcholine as a crystal growth modifier in the preparation process, and TS-1#0.1ACh was also employed in epoxidations of different substrates containing C=C double bonds. The crystalline sizes of the as-synthesized TS-1#0.1ACh catalysts were controlled with the acetylcholine content, and characterization results showed that the particle sizes of highly crystalline TS-1#0.1ACh zeolite reached 3.0 μm with a good Ti framework. Throughout the synthetic process, the growth rate of the crystals was accelerated by electrostatic interactions between the connected hydroxyl groups of the acetylcholine modifier and the negatively charged skeleton of the pre-zeolites. Furthermore, the TS-1#0.1ACh catalyst demonstrated maximum catalytic activity, good selectivity and high stability during epoxidation of allyl chloride. Importantly, the TS-1#0.1ACh catalyst was also highly versatile and effective with different unsaturated substrates. These findings may provide novel, easily separable and large TS-1 catalysts for efficient and clean industrial epoxidations of C=C double bonds.

Keywords： size-controlled TS-1     crystal modifier     steam-assisted crystallization     epoxidation    

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Prediction of the flash points of alkanes by group bond contribution method using artificial neural networks

PAN Yong, JIANG Juncheng, WANG Zhirong

Frontiers of Chemical Science and Engineering 2007, Volume 1, Issue 4,   Pages 390-394 doi: 10.1007/s11705-007-0071-z

Abstract: A group bond contribution model using artificial neural networks, which had the high ability of nonlinear

Keywords： information     nonlinear     quantitative correlation     superior     molecular    

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Calculation of H2+ Structural Parameters based on Hydrogen Atomic Protonized Model

Chen Jing

Strategic Study of CAE 2004, Volume 6, Issue 11,   Pages 29-32

Abstract: Three formulas deduced from above model for bond-length, bond-energy and force constant of hydrogen molecule

Keywords： hydrogen molecule ion     bond-length     bond-energy     force constant    

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Steel Fiber–Matrix Interfacial Bond in Ultra-High Performance Concrete: A Review Review

Yulin Deng,Zuhua Zhang,Caijun Shi,Zemei Wu,Chaohui Zhang

Engineering 2023, Volume 22, Issue 3,   Pages 215-232 doi: 10.1016/j.eng.2021.11.019

Abstract: significant application potential in infrastructure construction because of its excellent mechanical strengthThe steel fiber–matrix interfacial bond is the main factor that governs other mechanical propertiesThis paper presents a comprehensive review on the research progress of fiber–matrix bond behaviorsThe parameters of the fiber–matrix bond, including the geometry and orientation of fibers, surfacetreatment, and composition and strength of the matrix, are identified and discussed in detail.

Keywords： Ultra-high performance concrete     Interfacial bond     Steel fiber     Pullout behavior    

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Evaluating the material strength from fracture angle under uniaxial loading

Jitang FAN

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 2,   Pages 288-293 doi: 10.1007/s11709-018-0480-8

Abstract: The most common experimental methods of measuring material strength are the uniaxial compressive andCompressive strength is higher than tensile strength for a material.In this work, a unified relation of material strength under uniaxial compression and tension is developedThis constitutive relation is quantitatively illustrated by a function for analyzing the material strengthIt is full of interest to give a scientific illustration for designing the high-strength materials and

Keywords： strength     fracture     mechanics    

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The effects of interfacial strength on fractured microcapsule

Luthfi Muhammad MAULUDIN, Chahmi OUCIF

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 2,   Pages 353-363 doi: 10.1007/s11709-018-0469-3

Abstract: The effects of interfacial strength on fractured microcapsule are investigated numerically.attention is given to the effects of cohesive fracture on the microcapsule interface, namely fracture strengthmicrocapsule, the load carrying capacity of self-healing material under tension increases as interfacial strengthIn addition, given the fixed fracture strength of the interface of microcapsule shell, the higher the

Keywords： interfacial strength     cohesive elements     microcapsule     core-shell thickness ratio     fracture properties    

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Effect of loading rate on shear strength parameters of mechanically and biologically treated waste

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 12, doi: 10.1007/s11783-022-1595-7

Abstract:

● Mechanical behavior of MBT waste affected by loading rate was investigated.

Keywords： Mechanically and biologically treated waste     Landfill     Triaxial test     Loading rate     Axial strain     Shear strength    

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The strength–dilatancy characteristics embraced in hypoplasticity

Zhongzhi FU, Sihong LIU, Zijian WANG

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 2,   Pages 178-187 doi: 10.1007/s11709-013-0191-0

Abstract: The strength-dilatancy characteristics of frictional materials embraced in the hypoplastic model proposedThe flow rule, the failure state surface equation and the strength-dilatancy relationship embraced inThe performance of the two hypoplastic models in reproducing the relationship between the peak strengthNumerical investigations show that the performance in reproducing the strength-dilatancy relationship

Keywords： strength     dilatancy     hypoplasticity     frictional materials    

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Title Author Date Type Operation

Effect of embedment length of untreated natural fibres on the bond behaviour in cement mortar

Gudimella RAMAKRISHNA, Sriraman PRIYADHARSHINI

Journal Article

Study of bond strength between various grade of Ordinary Portland Cement (OPC) and Portland Pozzolane

A D POFALE, S P WANJARI

Journal Article

Shear strength model of the reinforced concrete beams with embedded through-section strengthening bars

Linh Van Hong BUI; Phuoc Trong NGUYEN

Journal Article

Calculation of Bond-length, Bond-energy and Force Constant of Hydrogen Molecule by Classical Mechanics

Chen Jing

Journal Article

Effect of noble metal nanoparticle size on C–N bond cleavage performance in hydrodenitrogenation: a study

Journal Article

The effect of carbon nanotubes and polypropylene fibers on bond of reinforcing bars in strain resilient

Souzana P. TASTANI,Maria S. KONSTA-GDOUTOS,Stavroula J. PANTAZOPOULOU,Victor BALOPOULOS

Journal Article

Effect of bond enhancement using carbon nanotubes on flexural behavior of RC beams strengthened with

Journal Article

Controllable synthesis of a large TS-1 catalyst for clean epoxidation of a C=C double bond under mild

Journal Article

Prediction of the flash points of alkanes by group bond contribution method using artificial neural networks

PAN Yong, JIANG Juncheng, WANG Zhirong

Journal Article

Calculation of H2+ Structural Parameters based on Hydrogen Atomic Protonized Model

Chen Jing

Journal Article

Steel Fiber–Matrix Interfacial Bond in Ultra-High Performance Concrete: A Review

Yulin Deng,Zuhua Zhang,Caijun Shi,Zemei Wu,Chaohui Zhang

Journal Article

Evaluating the material strength from fracture angle under uniaxial loading

Jitang FAN

Journal Article

The effects of interfacial strength on fractured microcapsule

Luthfi Muhammad MAULUDIN, Chahmi OUCIF

Journal Article

Effect of loading rate on shear strength parameters of mechanically and biologically treated waste

Journal Article

The strength–dilatancy characteristics embraced in hypoplasticity

Zhongzhi FU, Sihong LIU, Zijian WANG

Journal Article