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Research on strength developing law during the curing of domestic epoxy asphalt mixture

Qian Zhendong,Wang Yaqi and Shen Jialin

Strategic Study of CAE 2012, Volume 14, Issue 5,   Pages 90-95

Abstract:

Based on the mechanism of strength, the reserved time and curing temperatureof epoxy asphalt mixture are studied as the influencing factors of strength, and the range of reservedtime and the strength increasing law of epoxy asphalt mixture in different temperatures are determined

Keywords： epoxy asphalt     strength increasing     time-temperature condition     curing model    

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Study on reformulation of fluid catalytic cracking gasoline and increasing production of light olefins

YAN Pingxiang, MENG Xianghai, GAO Jinsen, XU Chunming, SUI Zhiyu

Frontiers of Chemical Science and Engineering 2008, Volume 2, Issue 1,   Pages 74-79 doi: 10.1007/s11705-008-0016-1

Abstract: The effects of reaction temperature, mass ratio of catalyst to oil, space velocity, and mass ratio of water to oil on the product distribution, the yields of light olefins (light olefins including ethylene, propylene and butylene) and the composition of the fluid catalytic cracking (FCC) gasoline upgraded over the self-made catalyst GL in a confined fluidized bed reactor were investigated. The experimental results showed that FCC gasoline was obviously reformulated under appropriate reaction conditions. The olefins (olefins with C atom number above 4) content of FCC gasoline was markedly reduced, and the aromatics content and octane number were increased. The upgraded gasoline met the new standard of gasoline, and meanwhile, higher yields of light olefins were obtained. Furthermore, higher reaction temperature, higher mass ratio of catalyst to oil, higher mass ratio of water to oil, and lower space velocity were found to be beneficial to FCC gasoline reformulation and light olefins production.
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Influence of increasing numbers of RE-inverters on the power quality in the distribution grids: A PQ

Przemyslaw JANIK, Grzegorz KOSOBUDZKI, Harald SCHWARZ

Frontiers in Energy 2017, Volume 11, Issue 2,   Pages 155-167 doi: 10.1007/s11708-017-0469-3

Abstract: This paper presents the selected power quality (PQ) indicia of a wind generator and a photovoltaic installation considered to be the representative of medium voltage and low voltage distribution grids. The analysis of measured values suggests that the decrease in PQ is a case of specific combination of distributed generation, grid parameters and load behaviour. Modern generators have a limited impact on PQ. On the other hand, fluctuations in power generation are regarded as an emerging PQ indicator. The growing number of distributed renewable installations causes stochastic, variable, and hardly predictable power flows in the distribution grid. The nature of fluctuations in wind and solar generation is different. In both cases, new indexes for the quantification of fluctuations are needed and are yet not standardised. Proper assessment of these fluctuations enables definition of useful fluctuation limits and rules for optimal storage system integration.

Keywords： power quality     harmonics     sags     photovoltaic(PV) system     doubly feed induction generator (DFIG)     inverters    

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Breeding strategies for increasing yield potential in super hybrid rice

Shihua CHENG,Xiaodeng ZHAN,Liyong CAO

Frontiers of Agricultural Science and Engineering 2015, Volume 2, Issue 4,   Pages 277-282 doi: 10.15302/J-FASE-2015081

Abstract: Super hybrid rice breeding is a new breeding method combining semi-dwarf breeding and heterosis breeding using germplasm and gene-environment interactions. This paper reviews the breeding strategies of super hybrid rice breeding in China, focusing on the utilization of heterosis of indica and japonica subspecies, construction of ideal plant architecture and pyramiding of disease resistant genes in restorer lines. To develop super hybrid rice, considerable effort should be made to explore genes related with high yield, good quality, resistance to pests and diseases, tolerance to stresses. Molecular breeding methods in combination with crossing techniques should be adopted in super hybrid rice breeding.

Keywords： super hybrid rice     breeding strategies     yield potential    

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Study of mechanism of activating flux increasing weld penetration of AC A-TIG welding for aluminum alloy

HUANG Yong, FAN Ding, FAN Qinghua

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 4,   Pages 442-447 doi: 10.1007/s11465-007-0076-9

Abstract: When multi-component flux AF305 is used as surface activating flux for an aluminum alloy, the weld pene tration of activating flux-tungsten inert-gas (A-TIG) welding is over two times more than that of conventional TIG welding. Using A-TIG welding with the modes of alternating current (AC), direct current electrode negative (DCEN) and direct current electrode positive (DCEP), respectively, the flux differently affects weld penetration when the polarity is different. After studied the effect of compelled arc con striction on weld penetration of AC welding, it is believed that the constriction of the whole arc root is not the main mechanism that flux AF305 dramatically improves weld penetration. The penetration has a relationship with the separate distribution of slag on the weld surface. Then, an observation of scanning electron microscopy (SEM) and an electronic data systems (EDS) analysis of slag were performed respectively. The separate distribution of slag on the weld pool during welding and the great constriction of arc spots were confirmed by TIG welding with helium shielding gas. The relationship between slag distribution and weld penetration was studied by adding aluminum powder into flux AF305 to change the distribution of slag. During welding, the separate distribution of slag on the weld pool results in the great constriction of arc spots, an increase in arc spot force, and an increase in Lorentz force within the arc and weld pool. Finally, the weld penetration is increased.

Keywords： A-TIG welding     surface     DCEN     electrode negative     increase    

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Increasing significance of advanced physical/chemical processes in the development and application of

RULKENS Wim

Frontiers of Environmental Science & Engineering 2008, Volume 2, Issue 4,   Pages 385-396 doi: 10.1007/s11783-008-0073-1

Abstract: Currently, there is an increasing need for the beneficial reuse of treated wastewater and to recover

Keywords： control     beneficial     valuable     scarcity     Development    

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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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Slender reinforced concrete shear walls with high-strength concrete boundary elements

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 1,   Pages 138-151 doi: 10.1007/s11709-022-0897-y

Abstract: advancements in the field of concrete materials over the past few decades, concrete mixes of high compressive strength, commonly referred to as high-strength concrete (HSC), have been developed.The finite-element model of a conventional normal-strength concrete (NSC) prototype wall was validatedThe HSC wall exhibited improved strength and stiffness, and thereby, allowed reduction in the longitudinalreinforcement area and size of the boundary elements for the same strength of the conventional wall.

Keywords： slender walls     high-strength concrete     rectangular and barbell-shaped walls     cold joints    

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Effect of environment change on the strength of cement/lime treated clays

Takenori HINO, Rui JIA, Seiji SUEYOSHI, Tri HARIANTO

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 2,   Pages 153-165 doi: 10.1007/s11709-012-0153-y

Abstract: The mechanism of the ground environment change and its effect on the strength of cement/lime treatedThe strength development of improved soil using cement and lime in different curing environments wasinvestigated in the laboratory for studying the effect of environment change on the strength also.It has been found that the strength deterioration of improved soil in deep mixing method is due to 1)When examining the long-term strength for preventing strength degradation, the effect of environmental

Keywords： soil solidification     ground environment     strength deterioration     pH     oxidation-reduction potential (ORP)    

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Calculation methods of the crack width and deformation for concrete beams with high-strength steel bars

Jianmin ZHOU, Shuo CHEN, Yang CHEN

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 3,   Pages 316-324 doi: 10.1007/s11709-013-0211-0

Abstract: Three groups of concrete beams reinforced with high-strength steel bars were tested, and the crack width

Keywords： concrete beam     high-strength steel bar     crack width     deformation    

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Effect of size on biaxial flexural strength for cement-based materials by using a triangular plate method

Hakan T TURKER

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 8,   Pages 1017-1028 doi: 10.1007/s11709-022-0871-8

Abstract: The effect of size on the biaxial flexural strength (BFS) of Portland cement mortar was investigated

Keywords： testing     apparatus & methods     plain concrete     tensile properties     biaxial flexural strength     triangular    

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Sensitivity analysis of the deterioration of concrete strength in marine environment to multiple corrosive

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 2,   Pages 175-190 doi: 10.1007/s11709-021-0791-z

Abstract: mrow>, and Mg2+, etc.) on the tensile and compressive strengthThe sensitivity analysis method for concrete strength is used to quantitatively analyze the sensitivityof concrete strength to the effects of each ion in a multi-salt solution without considering the influence

Keywords： sensitivity analysis     concrete strength     corrosion deterioration     multi-ion interaction     marine environment    

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Title Author Date Type Operation

Research on strength developing law during the curing of domestic epoxy asphalt mixture

Qian Zhendong,Wang Yaqi and Shen Jialin

Journal Article

Study on reformulation of fluid catalytic cracking gasoline and increasing production of light olefins

YAN Pingxiang, MENG Xianghai, GAO Jinsen, XU Chunming, SUI Zhiyu

Journal Article

Influence of increasing numbers of RE-inverters on the power quality in the distribution grids: A PQ

Przemyslaw JANIK, Grzegorz KOSOBUDZKI, Harald SCHWARZ

Journal Article

Breeding strategies for increasing yield potential in super hybrid rice

Shihua CHENG,Xiaodeng ZHAN,Liyong CAO

Journal Article

Study of mechanism of activating flux increasing weld penetration of AC A-TIG welding for aluminum alloy

HUANG Yong, FAN Ding, FAN Qinghua

Journal Article

Increasing significance of advanced physical/chemical processes in the development and application of

RULKENS Wim

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

Slender reinforced concrete shear walls with high-strength concrete boundary elements

Journal Article

Effect of environment change on the strength of cement/lime treated clays

Takenori HINO, Rui JIA, Seiji SUEYOSHI, Tri HARIANTO

Journal Article

Calculation methods of the crack width and deformation for concrete beams with high-strength steel bars

Jianmin ZHOU, Shuo CHEN, Yang CHEN

Journal Article

Effect of size on biaxial flexural strength for cement-based materials by using a triangular plate method

Hakan T TURKER

Journal Article

Sensitivity analysis of the deterioration of concrete strength in marine environment to multiple corrosive

Journal Article