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Construction & building materials 75건

  1. [해외논문]   Editorial Board   SCIE


    Construction & building materials v.134 ,pp. IFC - IFC , 2017 , 0950-0618 ,

    초록

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    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

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  2. [해외논문]   Editorial Board  


    Construction & building materials v.134 ,pp. IFC , 2017 , 0950-0618 ,

    초록

    원문보기

    원문보기
    무료다운로드 유료다운로드

    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

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  3. [해외논문]   Effects of cutting directions on the bonding strength in some wood types   SCIE

    Altinok, Mustafa (Gazi University, Technology Faculty, Department of Wood Products Industrial Engineering, Ankara, Turkey ) , Kucuktuvek, Mustafa (Gazi University, Industrial Arts Education Faculty, Department of Industrial Technology, Ankara, Turkey ) , Bircan, Mevlut Cihan (Gazi University, Technology Faculty, Department of Wood Products Industrial Engineering, Ankara, Turkey ) , Keskin, Hakan (Gazi University, Technology Faculty, Department of Wood Products Industrial Engineering, Ankara, Turkey)
    Construction & building materials v.134 ,pp. 1 - 6 , 2017 , 0950-0618 ,

    초록

    Abstract The aim of this study was to investigate the cutting direction in some wood types used in wood products industry on the bonding strength of wood-to-wood joint. The samples with different cutting directions prepared from the woods of Oriental beech ( Fagus orientalis Lipsky), European oak ( Quercus petraea (Mattu.) Liebl.), Scotch pine ( Pinus sylvestris Lipsky) and Toros cedar ( Cedrus libani A. Rich) have been glued with the Klebit–303 (K 303 ) and Kleiberit–305 (K 305 ) in diagonally tangential-radial (Di-TR), diagonally tangential-tangential (Di-TT), plain grain-grain (P-GG) joints of I-Type examples (by axial tension test) and diagonal miter joint (Di-MJ), diagonally tangential-grain (Di-TG), diagonal radial-grain (Di-RG) joints of L-Type examples (by diagonal tensile test) have been performed according to ISO 6237 standard. The results showed that the highest bonding strength was found to be 16.60N/mm 2 in Oriental beech with the K 303 in Di-TR and the lowest to be 2.227N/mm 2 in Toros cedar with the K 305 in P-GG by axial tension test, and the highest value was 10.98N/mm 2 in Oriental beech with the K 303 in P-RG the lowest value was 3.197N/mm 2 in Scotch pine with the K 305 in Di-MJ by diagonal tensile test. Thus, applying the Di-TR and Di-RG cutting order with the glue K 303 for bonding massive wood pieces without using auxiliary bonding elements (tenon, rabbet, dowel, dovetail etc.) may offer advantages over others. Highlights The highest bonding strength was found in beech. The highest bonding strength was obtained in Di-TR. K 303 adhesive performance was obtained better than K 305 adhesive.

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    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

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  4. [해외논문]   Corrosion-induced flexural behavior degradation of locally ungrouted post-tensioned concrete beams   SCIE

    Zhang, Xuhui (School of Civil Engineering and Architecture, Changsha University of Science & Technology, 410114 Changsha, China ) , Wang, Lei (School of Civil Engineering and Architecture, Changsha University of Science & Technology, 410114 Changsha, China ) , Zhang, Jianren (School of Civil Engineering and Architecture, Changsha University of Science & Technology, 410114 Changsha, China ) , Liu, Yongming (School for Engineering of Matter, Transport and Energy, Arizona State University, 85281 Tempe, AZ, USA)
    Construction & building materials v.134 ,pp. 7 - 17 , 2017 , 0950-0618 ,

    초록

    Abstract Strand corrosion within the insufficient grouted duct has become a serious problem affecting the durability of bridge structures. The residual flexural behavior of the locally ungrouted post-tensioned concrete beams after strand corrosion is investigated in the present study. Two experiments are performed: corroded strand test for the constitutive law development and beam test for the flexural behavior investigation. An analytical model is proposed to predict the ultimate strength, the deformation, and the strain response of corroded beams under external loadings. The proposed model considers the strain compatibility between strand and concrete, material mechanics deterioration of strand, and the asymmetric deflection due to local corrosion in ungrouted duct. The accuracy of the model is verified by the experimental observations. Results show that corrosion loss has less effect on the yield strength and elastic modulus than that on the ultimate strain of strand. It is also observed that light corrosion has little effect on the beam cracking and the load-deflection behavior before beam cracking. Severe corrosion degrades significantly the flexural capacity and the local post-cracking stiffness of beams, which leads to the asymmetric deformation and crack formation. Highlights Material property of corroded strand is tested for constitutive law development. Flexural behavior of corroded, locally ungrouted PT beams is experimental studied. Analytical model is proposed to predict the flexural behavior of corroded PT beams.

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    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

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  5. [해외논문]   Numerical and experimental characterization of the mechanical behavior of a new recycled elastomer for vibration isolation in railway applications   SCIE

    Diego, S. (LADICIM (Laboratory of the Division of Science and Engineering of Materials), University of Cantabria, Spain ) , Casado, J.A. (LADICIM (Laboratory of the Division of Science and Engineering of Materials), University of Cantabria, Spain ) , Carrascal, I. (LADICIM (Laboratory of the Division of Science and Engineering of Materials), University of Cantabria, Spain ) , Ferreñ (LADICIM (Laboratory of the Division of Science and Engineering of Materials), University of Cantabria, Spain ) , o, D. (AV Ingenieros, Barcelona, Spain ) , Cardona, J. (Acoustical and Mechanical Engineering Laboratory (LEAM), Polytechnic University of Cataluña, Spain) , Arcos, R.
    Construction & building materials v.134 ,pp. 18 - 31 , 2017 , 0950-0618 ,

    초록

    Abstract This research has been developed in the frame of a European project involving several partners with the aim of developing an elastomeric “eco-friendly” material based on end-of-life tyres. It is a material specifically designed for the manufacture of anti-vibration mats to be used under ballasted railway tracks or under concrete slab tracks to avoid or to reduce the ground-borne vibration transmission. This paper describes the experimental, analytical and numerical results of the characterization of the mechanical behavior of this new elastomeric material. The process of validation was developed in three domains: firstly, a thorough characterization of the behavior of mats manufactured in this new material under different situations was conducted. Test were carried out for determining the static and dynamic modules, the behavior under fatigue conditions and the ability of the material to resist mechanical actions in the presence of frost as well as the aging influence of water and temperature. Second, a study on the capacity of this type of mats to reduce the vibrations generated by rail traffic was carried out. To this end, the mechanical system constituted by the track, sleepers, ballast and soil, was modeled analytically, introducing also the effect derived from the presence of the anti-vibration mats. Finally, a Finite Element model in which the mechanical behavior of the material has been described using a Mooney-Rivlin model has been experimentally validated. Although this is a purely theoretical exercise, this result is a cause for optimism as it confirms the suitability of the use of the Finite Element method as a predictive tool for the behavior of anti-vibration mats under in-service conditions or in the process of pre-validation of new geometries. Highlights A new material was validated to produce anti-vibration mats for railway applications. The mechanical properties and the efficiency against vibrations were measured. A Finite Element model was validated.

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    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

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  6. [해외논문]   Effect of freeze – Thaw cycles on the physicomechanical properties of a pozzolanic mortar   SCIE

    Siline, Mohammed (University of M'sila, Algeria ) , Ghorbel, Elhem (L2MGC, University of Cergy Pontoise, France ) , Bibi, Mekki (University of M'sila, Algeria)
    Construction & building materials v.134 ,pp. 32 - 38 , 2017 , 0950-0618 ,

    초록

    Abstract This paper presents an assessment of the frost resistance, after 300 freeze – thaw cycles, of mortars made from cements having different amounts of pozzolan addition. Calcined Algerian clay was used, as clinker replacement, at 0, 10, 15 and 20% by weight. In order to limit its physical pozzolanicity, the fineness of the treated clay, at 700°C for 5h, was chosen very close to that of clinker. The aim of this work is to study the influence of the pozzolanic addition on the physical, mechanical and thermal properties of mortars undergoing this kind of cyclical loading. Experimental results show that compressive strength and thermal conductivity decreased, while porosity, water absorption and hydration progress increased. The deteriorations were in an absolute increase with the increase of treated clay level. Although the variant with 10% of addition was the least affected, it was found that whatever the substitution level, the clay fineness has not led to an improvement in pozzolan mortars behavior against the frost attack compared with the control CEM I. Highlights Pozzolanic materials may improve the mortar's frost resistance. The treated clay has not improved the mortar’s behavior when exposed to 300 F-T cycles. Despite its pozzolanic potential, damage increased with the clay content. The clay fineness (only 3870cm 2 /g) was the main factor of its low efficiency. The F-T cycles have favored the progress of cement hydration reactions.

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    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

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  7. [해외논문]   Effect of mass ratio of asphalt to cement on the properties of cement modified asphalt emulsion mortar   SCIE

    Liu, Baoju (Corresponding author.) , Liang, Dong
    Construction & building materials v.134 ,pp. 39 - 43 , 2017 , 0950-0618 ,

    초록

    Abstract This study evaluated the effects of two types of cationic modified asphalt emulsions, i.e. SBS modified asphalt emulsion and SBR modified asphalt emulsion, on the flow time, air content and mechanical properties of cement emulsified asphalt mortar (CEAM) at varying asphalt to cement (A/C) ratios. The flow time and air content of fresh CEAM were measured, and the compressive strength, elastic modulus and impact toughness of hardened CEAM were tested. The experimental results show that the flow time, air content and toughness increase with the increase of A/C ratio, while the compressive strength and 28d elastic modulus show a different trend. The effects of modifiers on the properties of CEAM are different. The flow time, air content and toughness increase with the SBS content, while the compressive strength and 28d elastic modulus show the opposite trend. Contrary to the toughness, the flow time, air content, compressive strength and 28d elastic modulus decrease with the SBR content. Highlights CRTSI type CEAM with modifier was investigated. A/C ratio significantly affect flow time, air content and mechanical properties of CEAM. Type of modifier and its dosage both affect the properties of CEAM.

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    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

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  8. [해외논문]   Mechanical properties of concrete with Sarcheshmeh mineral complex copper slag as a part of cementitious materials   SCIE

    Mirhosseini, Seyed Reza (Department of Civil Engineering, Kerman Branch, Islamic Azad University, Kerman, Iran ) , Fadaee, Mostafa (Department of Civil Engineering, Kerman Branch, Islamic Azad University, Kerman, Iran ) , Tabatabaei, Ramin (Department of Civil Engineering, Kerman Branch, Islamic Azad University, Kerman, Iran ) , Fadaee, Mohammad Javad (Department of Civil Engineering, Faculty of Engineering, Shahid Bahonar University of Kerman, Kerman, Iran)
    Construction & building materials v.134 ,pp. 44 - 49 , 2017 , 0950-0618 ,

    초록

    Abstract Concrete is widely used in construction industry with an ever increasing rate due to its particular characteristics. Replacement of cement as the most expensive part of concrete with industrial materials such as slag, can reduce the cost and help with a greener construction industry. For sustainable development, as well as enhanced performance and economy, alternative approaches, namely proper material for replacement of cement should be explored. Recently, replacing ordinary cement with mixed cement due to the economic and environmental benefits, has increased. This paper reports the results of an experimental study on the physical and chemical properties of the mineral complex copper slag as a by-product of Sarcheshmeh copper plant, and its effect on the mechanical properties of concrete, for which it constitutes a part of cementitious material. The effects of primary and secondary setting time, and percentage of slag as cementitious material, on the compressive strength of 10×10×10cm concrete cubic samples, were measured and compared. The mix was optimized for the best use of tailing material share of total cementitious materials, considering the mechanical properties based on the criteria of compressive strength of 7, 14, 28 and 42days and the optimum percentage of replacement for this cement-like material was specified. Highlights Possibility of using copper slag instead of part of cement in concrete is investigated. Compressive strength of cubic samples in different ages were measured and compared. By increasing the slag up to 30% of cement, acceptable results were obtained. Using industrial wastes such as copper slag has environmental & economic benefits.

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    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

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  9. [해외논문]   Laboratory study on the performance of hybrid macro soil fiber reinforced mixture   SCIE

    Tanzadeh, Javad (Department of Civil Engineering, Isfahan (Khorasgan) Branch, Islamic Azad University, P.O. Box: 81595-158, Isfahan, Iran ) , Vafaeian, Mahmood (Department of Civil Engineering, Isfahan University of Technology, Isfahan, Iran ) , Yusefzadeh-Fard, Mikael (Department of Civil Engineering, Tabriz University of Engineering, Isfahan, Iran)
    Construction & building materials v.134 ,pp. 50 - 55 , 2017 , 0950-0618 ,

    초록

    Abstract The goal of this research is laboratory assessment of mixture reinforced with hybrid macro synthetic fiber. The hybrid synthetic fibers are composed of Polypropylene, Polyethylene with Aramid fibers which possess appropriate strength, endurance and cohesion features and even also as a stabilizer is used for soil reinforcement. These fibers have been utilized to improve asphalt concretes performance against rutting damages and fatigue cracks. Theses fibers have effective role in increasing the useful life of pavements due to repeated loading through controlling thermal, reflection and fatigue cracks also reducing rutting of the mixture. In this research the dynamic creep, wheel track rutting, resilient modulus and indirect tensile fatigue strength tests were performed and investigated for the asphalt concretes reinforced with hybrid macro synthetic fibers. According to the obtained results, hybrid macro synthetic soil fibers, improve performance of the asphalt concrete against damages due to the rutting (permanent deformations), fatigue cracks and thermal cracks and thus help in reducing the final thickness of pavement through increasing the mixture strength. Highlights The impact of fiber reinforced mixture in dynamic loading is much more than static. Increasing the resilient modulus in fibers reinforced mixture reduces cracking at low temperatures. A large increase in fatigue life and also reduce the permanent deformations has been observed. Due to the increasing of elasticity and ductility so fiber reinforced mixture can prevent the progression of cracks.

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    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

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  10. [해외논문]   Durability performances of wollastonite, tremolite and basalt fiber-reinforced metakaolin geopolymer composites under sulfate and chloride attack   SCIE

    Ren, Daming (Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China ) , Yan, Chunjie (Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China ) , Duan, Ping (Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China ) , Zhang, Zuhua (Centre for Future Materials, University of Southern Queensland, Toowoomba, QLD 4350, Australia ) , Li, Lingyao (Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China ) , Yan, Zhongyun (Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China)
    Construction & building materials v.134 ,pp. 56 - 66 , 2017 , 0950-0618 ,

    초록

    Abstract This paper aims to investigate the durability related performances of geopolymer composite materials that synthesized by alkali activation of metakaolin (MK) with reinforcement of wollastonite (WS), tremolite (TR) and short basalt fiber (SBF). The resulting geopolymer composites were exposed to sodium sulfate (Na 2 SO 4 ) solutions (concentration 5–20%) and sodium chloride (NaCl) solution (concentration 5–20%). The compressive strengths, morphological evolution, microstructure and pore structure of the geopolymer composite specimens were examined to evaluate their durability performance. The result showed that the mix of a MK with addition of 5% WS, 5% TR, and 2% SBF exhibits the highest compressive strength in the studied range of mixture design. The compressive strength of geopolymer composites decreased with increasing of the concentration of Na 2 SO 4 and NaCl solutions, and with the extension of exposure period as well. The average pores size of geopolymer shifted from 22nm to 92nm after the sulfate exposure, and the total porosity also increased. This is in agreement with the compressive strength development. The findings of this study suggest that reinforcement by mineral particles and fibers is an effective approach to increase the compressive strength of geopolymer; and it is also beneficial to the enhancement of the resistance to sulfate and chloride attack. Highlights A geopolymer was proposed based on metakaolin blended with mineral particles and fiber. The mineral particles and fiber play a reinforced role. The resistance to the sulfate and chloride attack was enhanced. MK blended with 5% WS, 5% TR and 2% SBF exhibits the optimal strength.

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    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

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