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  • 1
    Online Resource
    Online Resource
    TENSILE CREEP OF FLY ASH CONCRETE AT EARLY AGE CONSIDERING THE YOUNG'S MODULUS DEVELOPMENT
    ISEC Press ; 2018
    In:  Proceedings of International Structural Engineering and Construction Vol. 5, No. 2 ( 2018-12)
    Details
    In: Proceedings of International Structural Engineering and Construction, ISEC Press, Vol. 5, No. 2 ( 2018-12)
    Abstract: Tensile properties are important for predicting tensile stress which causes thermal cracking. Fly ash, a by-product from coal-fired power plants, has been recently used to reduce such thermal cracks. However, investigations dealing with tensile properties of fly ash concrete are still limited. This study focuses on the tensile properties of concrete mixed with fly ash at an early age. Fly ash was mixed in general purpose concrete with a cement-replacement ratio of 20% by mass to simulate fly ash concrete used in Japan. To examine tensile Young's modulus and tensile creep, direct tension test was conducted using dog-bone shaped specimens. The tensile creep tests were conducted at the age of 3 days or 7 days, and the loading (30% of splitting tensile strength at the loading age) was sustained for 14 days. Past investigations usually assumed a constant elastic strain during creep test. It should be noted however that elastic strain at early age decreases with the age of concrete as hydration continues. This study takes a consideration of Young's modulus development during creep test to distinguish actual creep and elastic strains. Test results show that creep strain has been underestimated when assuming constant elastic strain.
    Type of Medium: Online Resource
    ISSN: 2644-108X
    URL: Article
    DOI: 10.14455/ISEC.res.2018.132
    Language: English
    Publisher: ISEC Press
    Publication Date: 2018
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  • 2
    Online Resource
    Online Resource
    MECHANICAL PROPERTIES OF FLY ASH-BASED ALKALI-ACTIVATED CEMENT USING A STATISTICAL ANALYSIS TECHNIQUE
    ISEC Press ; 2014
    In:  Proceedings of International Structural Engineering and Construction Vol. 1, No. 1 ( 2014-11)
    Details
    In: Proceedings of International Structural Engineering and Construction, ISEC Press, Vol. 1, No. 1 ( 2014-11)
    Abstract: This paper presents the mechanical properties of fly ash-based alkali-activated cement (AAC). A statistical analysis method was used to determine the effect of mix proportion parameters on the dry density and compressive strength of fly ash-based AAC pastes and mortars. For that purpose, sample mixtures were designed according to Taguchi’s experimental design method, i.e., in a L9 orthogonal array. Four factors were selected: “silica fume content” (SF), “sand to solid ratio” (s/c), “liquid to solid ratio” (l/s), and “superplasticiser content” (SP). The experimental results were analysed by using signal to noise for quality control of each mixture, and analysis of variance (ANOVA) was used to determine the significant effect on the compressive strength of fly ash-based AAC. Furthermore, a regression-analysis method was used to predict the compressive strength according to the variation of the four factors. Results indicated that silica fume is the most influencing parameter on compressive strength, which could be decreased by superplasticiser and l/s ratio. There is no significant effect of sand-to-cementitious ratio on compressive strength of fly ash-based AAC. The dry density decreases as the sand-to-cementitious ratio is decreased. The increasing l/s ratio and superplasticiser dosage could further decrease the dry density of fly ash-based AAC.
    Type of Medium: Online Resource
    ISSN: 2644-108X
    URL: Article
    DOI: 10.14455/ISEC.res.2014.38
    Language: English
    Publisher: ISEC Press
    Publication Date: 2014
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  • 3
    Online Resource
    Online Resource
    USE OF BIM TOOLS FOR SITE LAYOUT PLANNING
    ISEC Press ; 2014
    In:  Proceedings of International Structural Engineering and Construction Vol. 1, No. 1 ( 2014-11)
    Details
    In: Proceedings of International Structural Engineering and Construction, ISEC Press, Vol. 1, No. 1 ( 2014-11)
    Abstract: Building Information Model (BIM) has a wide range of applications and benefits that can help in communicating a large amount of information of the entire project lift cycle. BIM allows for 4D construction sequencing and scheduling through visual simulation. This paper demonstrates how BIM tools can be used for construction site layout planning and simulation. A methodology framework is developed to create the workflow necessary for the planning. Bentley's AECOsim Building Designer V8i was used as a modelling tool. Available on-line 3D models were sourced and collected for the simulation. In the process, shortcomings, or lack of BIM tools specific for Site Layout Planning, were identified. It is hoped that this research could lead to further development of BIM software aimed at supporting the construction industry.
    Type of Medium: Online Resource
    ISSN: 2644-108X
    URL: Article
    DOI: 10.14455/ISEC.res.2014.80
    Language: English
    Publisher: ISEC Press
    Publication Date: 2014
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  • 4
    Online Resource
    Online Resource
    EXPERIMENTAL STUDY ON COMPRESSIVE YOUNG’S MODULI AND TENSILE YOUNG’S MODULUS OF FLY ASH CONCRETE
    ISEC Press ; 2018
    In:  Proceedings of International Structural Engineering and Construction Vol. 5, No. 2 ( 2018-12)
    Details
    In: Proceedings of International Structural Engineering and Construction, ISEC Press, Vol. 5, No. 2 ( 2018-12)
    Abstract: Initial cracks due to volume changes at an early age affect the durability of concrete structures, so numerical simulations are often conducted in order to predict cracks. Such prediction requires some mechanical properties of early age concrete. Tensile Young's modulus is directly dependent on the prediction of tensile stress and is one of the important input data for FEM analysis. However, direct tension test for tensile Young's modulus needs a unique apparatus and specimen, and such test is not suitable for evaluating Young's modulus at early ages of concrete. The present study compared tensile Young's modulus with compressive Young's moduli of Fly ash concrete. Compressive Young's moduli used in this study were secant modulus and initial tangent modulus. In addition, linear modulus taken from a regression line of a compressive stress-strain curve in the range of stresses less than the splitting tensile strength was also evaluated. It is found that the secant modulus, which is generally used as Young's modulus in Japan was clearly smaller than the tensile Young's modulus, which means that, tensile stresses evaluated using a secant modulus might be underestimated. On the other hand, linear modulus and initial tangent modulus were almost equal to the tensile Young's modulus. This result indicates that tensile stresses can be evaluated using Young's modulus obtained from a compression test with general apparatus and specimens.
    Type of Medium: Online Resource
    ISSN: 2644-108X
    URL: Article
    DOI: 10.14455/ISEC.res.2018.98
    Language: English
    Publisher: ISEC Press
    Publication Date: 2018
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  • 5
    Online Resource
    Online Resource
    USE OF FERROCEMENT PANEL AS REINFORCED CONCRETE SLABS WITH LIGHTWEIGHT BLOCKS INFILL
    ISEC Press ; 2014
    In:  Proceedings of International Structural Engineering and Construction Vol. 1, No. 1 ( 2014-11)
    Details
    In: Proceedings of International Structural Engineering and Construction, ISEC Press, Vol. 1, No. 1 ( 2014-11)
    Abstract: This paper is part of an experimental series to investigate the potential use of ferrocement panels as a permanent form of reinforced concrete slabs with lightweight blocks infill. The ferrocement panels used are engineered with polyvinyl alcohol (PVA) fiber to have a strain hardening which can be characterized as high-performance fiber-reinforced cementitious composite (HPFRCC), called Engineered Ferrocement (EF). In the experimental work, ferrocement control panels and hybrid ferrocement panels were tested for strength capacity and hard strain behavior through flexure, toughness, and multitrack forming. The results showed that by using the ideal fiber/wire mesh content, the hybrid ferrocement panels act as a strain-hardening cementitious material, and successfully increasing the flexure strength compared to the control-group ferrocement. The initial investigation indicates that hybrid PVA fiber ferrocement in tensile zones can be successfully used as permanent form.
    Type of Medium: Online Resource
    ISSN: 2644-108X
    URL: Article
    DOI: 10.14455/ISEC.res.2014.66
    Language: English
    Publisher: ISEC Press
    Publication Date: 2014
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  • 6
    Online Resource
    Online Resource
    SUSTAINABILITY IMPLICATIONS OF THE USE OF HYBRID POLYVINYL ALCOHOL FIBRE-REINFORCED FERROCEMENT AND FLY ASH
    ISEC Press ; 2018
    In:  Proceedings of International Structural Engineering and Construction Vol. 5, No. 2 ( 2018-12)
    Details
    In: Proceedings of International Structural Engineering and Construction, ISEC Press, Vol. 5, No. 2 ( 2018-12)
    Abstract: Extensive research has been conducted on the use of fly ash as a partial replacement of cement in order to promote the sustainable use of cement. Most of these research has focused on the investigation of the cementitious properties of the blended cement and the engineering properties of the end products, such as fly ash concrete. The sustainability benefit of using fly ash is often qualitatively perceived without any quantitative assessment. A recent study on the performance of hybrid polyvinyl alcohol fibre-reinforced ferrocement (HPVAF) shows that adding moderate amounts of fly ash in the mixes could maintain the ultimate flexure and tensile strength of HPVAF. The increased service life/durability and the use of FA up to a 25% replacement for cement in HPVAF not only conserve virgin resources for producing energy-intensive construction materials but also avoid associated environmental impacts due to the manufacturing of these materials. This certainly offers socio-economic benefits in terms of cost saving, enhance affordability and guaranteed material supply for the people both in current and future generations. Life cycle sustainability assessment (LCSA) was conducted to determine these triple bottom line benefits associated with the use of HPVAF and FA in building construction.
    Type of Medium: Online Resource
    ISSN: 2644-108X
    URL: Article
    DOI: 10.14455/ISEC.res.2018.130
    Language: English
    Publisher: ISEC Press
    Publication Date: 2018
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  • 7
    Online Resource
    Online Resource
    Silo quake response spectrum of iron ore train load out bin
    Elsevier BV ; 2018
    In:  Advanced Powder Technology Vol. 29, No. 11 ( 2018-11), p. 2775-2784
    Details
    In: Advanced Powder Technology, Elsevier BV, Vol. 29, No. 11 ( 2018-11), p. 2775-2784
    Type of Medium: Online Resource
    ISSN: 0921-8831
    URL: Article
    DOI: 10.1016/j.apt.2018.07.026
    RVK:
    ZM 0001
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2018
    detail.hit.zdb_id: 2032425-X
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  • 8
    Online Resource
    Online Resource
    Thermal and mechanical transient behaviour of steel doors installed in non‐load‐bearing partition wall assemblies during exposure to the standard fire test
    Wiley ; 2016
    In:  Fire and Materials Vol. 40, No. 8 ( 2016-12), p. 1070-1089
    Details
    In: Fire and Materials, Wiley, Vol. 40, No. 8 ( 2016-12), p. 1070-1089
    Abstract: In this paper, the authors present experimental results and observations of four full‐scale standard fire tests on single‐leaf steel doors and steel frames installed in 3 × 3 m non‐load‐bearing partition walls. Three full‐scale fire tests were performed on steel doors installed in lightweight partition walls constructed by using steel C‐section studs with gypsum boards fixed on both sides. Two lightweight walls incorporated Rockwool cavity insulation, while the third lightweight wall was constructed without cavity insulation. The fourth fire test involved a steel door installed in a masonry partition wall. While the steel door leaf and door frames were identical in all four full‐scale tests, only the steel door installed in the masonry wall achieved the desired fire resistance rating of 30 min. The integrity criterion for fire resistance was determined for the scenario when the door opened away from the furnace. The duration of fire resistance according to the integrity criterion was found to be 38, 25 and 19 min for the same door when installed in masonry wall, uninsulated lightweight wall and insulated lightweight wall respectively. For the thermal insulation criterion of fire resistance, the scenario of the door opening into the fire was found to be the most onerous. Copyright © 2016 John Wiley & Sons, Ltd. Copyright © 2016 John Wiley & Sons, Ltd.
    Type of Medium: Online Resource
    ISSN: 0308-0501 , 1099-1018
    URL: Issue
    URL: Article
    DOI: 10.1002/fam.v40.8
    DOI: 10.1002/fam.2365
    Language: English
    Publisher: Wiley
    Publication Date: 2016
    detail.hit.zdb_id: 2002816-7
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  • 9
    Online Resource
    Online Resource
    Durability properties of alkali pozzolan cement (APC)
    Sri Lanka Journals Online ; 2019
    In:  Journal of the National Science Foundation of Sri Lanka Vol. 47, No. 1 ( 2019-03-31), p. 121-
    Details
    In: Journal of the National Science Foundation of Sri Lanka, Sri Lanka Journals Online, Vol. 47, No. 1 ( 2019-03-31), p. 121-
    Type of Medium: Online Resource
    ISSN: 2362-0161 , 1391-4588
    URL: Article
    DOI: 10.4038/jnsfsr.v47i1.8929
    Language: Unknown
    Publisher: Sri Lanka Journals Online
    Publication Date: 2019
    detail.hit.zdb_id: 2579431-0
    SSG: 11
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  • 10
    Online Resource
    Online Resource
    Significance of structural vibrations on the flow rates and pressures inside a silo during discharge
    Inderscience Publishers ; 2019
    In:  International Journal of Lifecycle Performance Engineering Vol. 3, No. 3/4 ( 2019), p. 360-378
    Details
    In: International Journal of Lifecycle Performance Engineering, Inderscience Publishers, Vol. 3, No. 3/4 ( 2019), p. 360-378
    Type of Medium: Online Resource
    ISSN: 2043-8648 , 2043-8656
    URL: Article
    DOI: 10.1504/IJLCPE.2019.103702
    Language: English
    Publisher: Inderscience Publishers
    Publication Date: 2019
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