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Investigation of material composition,design,and performance of open-graded asphalt mixtures for semi-flexible pavement:A comprehensive experimental study

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Journal of Traffic and Transportation Engineering(English Edition) 2024年第1期11卷 92-116页

作者： mohammad Taghipoor Abolfazl hassani mohammad m.Karimi Department of Civil and Environmental Engineering Tarbiat Modares UniversityTehranIran

The primary goal of this study is the design and construction of semi-flexible pavement(SFP)mixture in accordance with the engineering and mechanical *** study involves the use of a range of gradation curves,air void contents,cellulose and synthesized fibers,and neat and modified asphalt binders to prepare the open-graded asphalt(OGA)*** analyze the characteristics of these mixtures,a variety of test,namely binder drainage,semi-circular bending(SCB),Cantabro,wheel tracking,indirect tensile strength(ITS),and permeability tests were ***,to analyze the prepared grouting material,flexural strength,compressive strength,and fluidity tests were *** the final stage,SFP was compared to HmA in terms of engineering characteristics and *** to the results,SFP was more resistant to skid,rutting,fire,and moisture damage,while HmA had a better performance in fracture tests,including SCB *** to the results of the mechanical performance tests conducted on OGA mixtures,the highest and lowest values for air void content to achieve the highest mechanical performance level were 30%-35%and 25%,***,based on the laboratory results,it was determined that the required void ratio for constructing OGA mixtures was 24%-26%based on the bitumen type and fibers amount in the ***,SFP mixture can be regarded as a viable alternative to common pavements thanks to its high resistance to rutting and moisture damage,long freezing-thawing fatigue life,and adequate fire and skid resistance.

关键词： Semi-flexible pavement mixture Open-graded asphalt mixture Engineering properties Cantabro test Hot mix asphalt

Stability analysis of slopes with planar failure using variational calculus and numerical methods

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Frontiers of Structural and Civil Engineering 2020年第5期14卷 1262-1273页

作者： Norly BELANDRIA RobertoÚCAR Francisco m.LEON Ferri hassani Geological Engineering School University of Los AndesMérida 5101Venezuela mechanical Engineering School University of Los AndesMérida 5101Venezuela Department of mining and material Engineering McGill UniversityMontrealQC H3A 0E9Canada

This study investigates the technique of variational calculus applied to estimate the slope stability considering the mechanism of planar *** critical plane failure surface should be determined because it theoretically indicates the most unfavorable plane to be considered when stabilizing a slope to rectify the instability generated by several statistically possible *** generates integrals that can be solved by numerical methods,such as the Newton Cotes and the finite differences ***,a system of nonlinear equations is obtained and *** surface of the critical planar failure is determined by applying the condition of transversality in mobile boundaries,for which various examples are *** number of slices is varied in one of the examples,while the surface of the critical planar failure is determined in the *** are compared using analytical methods through axis *** the results obtained by considering normal stress,safety factors,and critical planar failure are nearly the same;however,in this research,a study is carried out for“n”number of slices using programming ***-routines are important because they can be applied in slopes with different geometry,surcharge,interstitial pressure,and pseudo-static load.

关键词： slopes stability planar failure variational calculus numerical methods

Numerical Simulations of Hydromagnetic mixed Convection Flow of Nanofluids inside a Triangular Cavity on the Basis of a Two-Component Nonhomogeneous mathematical model

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Fluid Dynamics & materials Processing 2021年第1期17卷 1-20页

作者： Khadija A.Al-hassani m.S.Alam m.m.Rahman Department of mathematics College of ScienceSultan Qaboos UniversityMuscatOman Department of mathematics Jagannath UniversityDhakaBangladesh

Nanofluids have enjoyed a widespread use in many technological applications due to their peculiar *** simulations are presented about the unsteady behavior of mixed convection of Fe_(3)O_(4)-water,Fe_(3)O_(4)-kerosene,Fe_(3)O_(4)-ethylene glycol,and Fe_(3)O_(4)-engine oil nanofluids inside a lid-driven triangular *** particular,a two-component non-homogeneous nanofluid model is *** bottom wall of the enclosure is insulated,whereas the inclined wall is kept a constant(cold)temperature and various temperature laws are assumed for the vertical wall,namely:θ=1(Case 1),θ=Yð1YÞ(Case 2),andθ=sinð2-YÞ(Case 3).A tilted magnetic field of uniform strength is also present in the fluid *** a numerical point of view,the problem is addressed using the Galerkin weighted residual finite element *** role played by different parameters is assessed,discussed critically and interpreted from a physical *** find that a higher aspect ratio can produce an increase in the average Nusselt ***,the Fe_(3)O_(4)-EO and Fe_(3)O_(4)-H2O nanofluids provide the highest and smallest rate of heat transfer,respectively,for all the considered(three variants of)thermal boundary conditions.

关键词： Nanofluid mixed convection lid-driven triangular cavity finite element method

The influence of microwave irradiation on rocks for microwaveassisted underground excavation

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Journal of Rock mechanics and Geotechnical Engineering 2016年第1期8卷 1-15页

作者： Ferri hassani Pejman m.Nekoovaght Nima Gharib Department of mining and material Engineering McGill University

Demand is growing for explosive-free rock breakage systems for civil and mining engineering, and space industry applications. This paper highlights the work being undertaken in the Geomechanics Laboratory of mc Gill University to make a real application of microwave-assisted mechanical rock breakage to fullface tunneling machines and drilling. Comprehensive laboratory tests investigated the effect of microwave radiation on temperature profiles and strength reduction in hard rocks(norite, granite, and basalt)for a range of exposure times and microwave power levels. The heating rate on the surface of the rock specimens linearly decreased with distance between the sample and the microwave antenna, regardless of microwave power level and exposure time. Tensile and uniaxial compressive strengths were reduced with increasing exposure time and power level. Scanning electron micrographs(SEms) highlighted fracture development in treated basalt. It was concluded that the microwave power level has a strong positive influence on the amount of heat damage induced to the rock surface. Numerical simulations of electric field intensity and wave propagation conducted with COmSOL multiphysics~ software generated temperature profiles that were in close agreement with experimental results.

关键词： microwaves Crack density microwave-assisted tunnel boring Rock breakage

Experimental investigation on the effects of microwave irradiation on kimberlite and granite rocks

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Journal of Rock mechanics and Geotechnical Engineering 2021年第2期13卷 267-274页

作者： Samir m.Deyab Hamed Rafezi Ferri hassani mehrdad Kermani Agus P.Sasmito Department of mining and materials Engineering McGill UniversityMontrealCanada

This study is a part of an overall research project on the effects of microwave(mW)irradiation on rocks for assisted rock breaking systems as well as mineral processing at mcGill *** the first time,this paper highlights a comprehensive investigation on the effects of microwave irradiation on Canadian *** contribution to the continuous rock excavation and rock weakening effect prior to implementation of mechanical techniques was *** different kimberlite rocks,*** kimberlite(VK)and hypabyssal kimberlite(HK),and granite samples were *** important physical properties of the rock samples were measured including rock quality designation(RQD),specific gravity,porosity,and specific heat *** samples were treated for various exposure times using a multi-mode mWunit at different power levels ranging from 2 kW to 15 *** effect of mW irradiation on rock samples was *** results indicate that the mechanical properties including unconfined compressive strength(UCS)and Brazilian tensile strength(BTS)were significantly dropped as a result of ***,the effect on rock abrasivity using the Cerchar abrasivity index(CAI)has also been discussed.

关键词： microwave irradiation Kimberlite Rock excavation Rock strength Abrasivity

Distribution modulo 1 of a linear sequence associated to a multiplicative function evaluated at polynomial arguments

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Science China mathematics 2010年第9期53卷 2203-2206页

作者： DESHOUILLERS Jean-marc hassani mehdi Institut mathématique de Bordeaux UMR 5251Universit'e de Bordeaux et CNRS33405 TALENCE CedexFrance Department of mathematics Institute for Advanced Studies in Basic Sciences(IASBS)Zanjan 45137-66731P.O.Box 45195-1159Iran

In two previous papers,the first named author jointly with Florian Luca and Henryk Iwaniec,have studied the distribution modulo 1 of sequences which have linear growth and are mean values of multiplicative functions on the set of all the *** this note,we give a first result concerning sequences with linear growth associated to the mean values of multiplicative functions on a set of polynomial values,proving the density modulo 1 of the sequencem[∑((m2+1))(m2+1)(m≤n)]*** result is but an illustration of the theme which is currently being developed in the PhD thesis of the second named author.

关键词： distribution modulo 1 multiplicative function sieve

Evaluation of the effect of sodium silicate addition to mine backfill,Gelfill-Part 2:Effects of mixing time and curing temperature

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Journal of Rock mechanics and Geotechnical Engineering 2015年第3期7卷 668-673页

作者： m.Kermani F.P.hassani E.Aflaki m.Benzaazoua m.Nokken mining Engineering Department McGill University Amirkabir University of Technology Universite du Quebec en Abitibi Temiscamingue Department of Building Civil & Environmental EngineeringConcordia University

The effects of mixing time and curing temperature on the uniaxial compressive strength （UCS） andmicrostructure of cemented hydraulic fill （CHF） and sodium silicate-fortified backfill （Gelfill） wereinvestigated in the laboratory. A series of CHF and Gelfill samples was mixed for time periods rangingfrom 5 min to 60 min and cured at temperatures ranging from 5 C to 50 C for 7 d, 14 d or 28 *** the mixing time negatively influenced the UCS of Gelfill samples, but did not have a detectableeffect on CHF samples. The curing temperature had a strong positive impact on the UCSs of both Gelfilland CHF. An elevated temperature caused rapid UCS development over the first 14 d of curing. mercuryintrusion porosimetry （mIP） indicated that the pore size distribution and total porosity of Gelfill werealtered by curing temperature.

关键词： Gelfill Cemented hydraulic fill(CHF) Sodium silicate mercury intrusion porosimetry(mIP) Drainage

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Friction factor correlation for airflow through broken rocks and its applications in mine ventilation

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International Journal of mining Science and Technology 2020年第4期30卷 455-462页

作者： Leyla Amiri Seyed Ali Ghoreishi-madiseh Ferri P.hassani Agus P.Sasmito Department of mining and materials Engineering McGill UniversityMontrealQuebec H3A 2A7Canada Norman B.Keevil Institute of mining Engineering University of British ColumbiaVancouverBritish Columbia V6T 1Z4Canada

The Atkinson equation along with its friction factor is commonly used to estimate pressure requirement in mine ***,friction factor correlation of flow through broken rock,typically found in blasted stope,gob,rock pit or block caving rock deposits,etc.,is currently ***,it is impractical to conduct direct measurements of flow resistance in an inaccessible broken rock *** paper aims to develop a new friction factor correlation of flow through broken rock that can be used directly in Atkinson *** proposed correlation is valid for broken rocks with diameter between 0.04 and 1.2 m and porosity ranging from 0.23 to 0.7.

关键词： Broken rock Fractured rock Packed rock bed Large particle Pressure drop Friction factor

Advances in fungal-assisted phytoremediation of heavy metals:A review

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Pedosphere 2021年第3期31卷 475-495页

作者： muhammad KHALID Saeed UR-RAHmAN Danial hassani Kashif HAYAT Pei ZHOU Nan HUI Key Laboratory of Urban Agriculture School of Agriculture and BiologyShanghai Jiao Tong UniversityShanghai 200240China Joint International Research Laboratory of metabolic&Developmental Sciences Key Laboratory of Urban Agriculture(South)of Ministry of AgriculturePlant Biotechnology Research CenterFudan-SJTU-Nottingham Plant Biotechnology R&D CenterSchool of Agriculture and BiologyShanghai Jiao Tong UniversityShanghai 200240China

Trace metals such as manganese(mn),copper(Cu),zinc(Zn),and iron(Fe)are essential for many biological processes in plant life ***,in excess,they can be toxic and disrupt plant growth processes,which is economically undesirable for crop *** this reason,processes such as homeostasis and transport control of these trace metals are of constant interest to scientists studying heavily contaminated *** is a promising cleanup technology for soils polluted with heavy ***,this technique has some disadvantages,such as the slow growth rate of metal-accumulating plant species,low bioavailability of heavy metals,and long duration of ***-assisted phytoremediation is a promising strategy for hyperaccumulating,detoxifying,or remediating soil *** mycorrhizal fungi(AmF)are found in association with almost all plants,contributing to their healthy performance and providing resistance against environmental *** colonize plant roots and extend their hyphae to the rhizosphere region,assisting in mineral nutrient uptake and regulation of heavy metal *** fungi exist in every healthy plant tissue and provide enormous services to their host plants,including growth enhancement by nutrient acquisition,detoxification of heavy metals,secondary metabolite regulation,and enhancement of abiotic/biotic stress *** aim of the present work is to review the recent literature regarding the role of AmF and endophytic fungi in plant heavy metal tolerance in terms of its regulation in highly contaminated conditions.

关键词： arbuscular mycorrhizal fungi bioremediation endophytic fungi environmental stress metal tolerance microbe plant transporter soil contaminant