Home
Home
    • Home
    • About us
      • About CTAC
      • Organization
      • Regulation
    • People
      • Members
      • Positions available
    • Research
      • Vision
      • Research Areas
        • Construction Materials and Technologies
        • Hydraulics and Environment
        • Territory
      • Research projects
      • Research Projects 2013-2018
    • Facilities
      • Construction Materials and Technologies
      • Hydraulics and Environment
      • Territory
    • Publications
      • All
      • Books
      • Book Chapters
      • Papers in Scientific Journals
      • Conference Comunications
      • PhD Thesis
      • Masters Thesis
      • Journal
    • Education
      • Doctoral Programme Infrarisk
      • Doctoral Programme in Civil Engineering
      • Doctoral Programme in Eco Construction and Rehabilitation
      • Doctoral Programme of Solid Waste Management and Treatment
      • International Doctorate in Sustainable Built Environment
        • International Doctorate in Sustainable Built Environment
      • Master's Degree in Civil Engineering
      • Master's Degree in Sustainable Built Environment
      • Master's Degree in Urban Engineering
      • Master´s Degree in Sustainable Construction and Rehabilitation
    • Partners
    • Events
    • News
    • SITAC
    Filter

    Publications

    Papers in International JournalsChapters/ Papers in International BooksChapters/ Papers in National BooksCommunications in International ConferencesCommunications in National ConferencesMSc ThesesBooksProceedingsPatentsTechnical/ Scientific ReportsPhD Theses
    @JournalArticle {2381,
    	title = {Kinetics comparison of alkali-reactivity tests for aggregates},
    	journal = {Key Engineering Materials},
    	volume = {634},
    	year = {2015},
    	month = {2015-02-01 00:00:00},
    	pages = {506-516},
    	publisher = {Trans Tech Publications Ltd},
    	abstract = {

    Among the test-methods for evaluation of aggregates reactivity towards alkali-silica
    reaction (ASR), linear dilatation of mortar bars or concrete prisms is often used in several tests
    under various conditions, criteria and procedures of measuring and accelerating the reaction. As
    reactivity is an essentially kinetic property, the expansion limits in such tests, or even tests results
    for the same aggregate, should be kinetically inter-related.
    This paper presents a proposal of a kinetic relationship for critical reaction rates, evaluated from
    criteria of standard test-methods NF P 18-590, ASTM C 1260 and ASTM C 1293 . To do so, the
    critical expansion rate of these tests were corrected for a reference 1M alkalinity and depicted as
    Arrhenius plot. The high correlation of the regression line shows linearity of the plotted data, which
    was assumed as a criterion of kinetic compatibility between the said tests.
    The discussion includes a comparison with other tests and literature comments on their evaluation.
    The main interest of this study concernong the potential for ASR, is to discuss and compare
    methods aiming to improve the service life of concrete structures, by:
    i) selection of good materials;
    ii) decisions on the appropriate concrete formulation;
    iii) foreseeing possible problems allowing to plan monitoring and/or the need for adequate
    intervention as well as the possibility of test improvements.
    The extension of service life allows savings in raw materials and energy, improvement of the
    investment economics and, in the long term, lower investment requirements.

    }, keywords = {Aggregates, alkali-silica reaction, Expansion tests, reactivity}, issn = {10139826}, doi = {doi:10.4028/www.scientific.net/KEM.634.506}, author = {Gonzalez, L. M. and Santos Silva, A. and Jalali, S.} }

    About CTAC

    The Centre for Territory, Environment and Construction (CTAC) is a research unit of the School of Engineering of University of Minho (UMinho), recognised by the “FCT – Fundação para a Ciência e Tecnologia” (Foundation for Science and Technology), associated to the Department of Civil Engineering (DEC), with whom it shares resources and namely human resources.

    Currently CTAC aggregates 24 researchers holding a PhD of which 20 are faculty professors of the Civil Engineering Department. Read more


    Watch the CTAC Institutional Video

    Journal

    Research Areas of Competence

    Construction Materials and Technologies
    Hydraulics and Environment
    Territory

    News

    Contact us

    Centro de Território, Ambiente e Construção
    Escola de Engenharia da Universidade do Minho
    Campus de Azurém
    4800-058 Guimarães, Portugal

    Phone: + 351 253 510 200 (517 206)
    Fax: + 351 253 510 217

    Email: geral@ctac.uminho.pt


    Copyright 2014 CTAC Research Group in Territory, Environment and Construction
    Website Credits