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ISSN 1392–3730 print / ISSN 1822–3605 online

JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT http:/www.jcem.vgtu.lt 2006, Vol XII, No 3, 215–220

STUDY OF SORPTIVITY OF SELF-COMPACTING CONCRETE WITH MINERAL ADDITIVES
Luiz Antonio Pereira de Oliveira1, João Paulo de Castro Gomes2, Cristiana Nadir Gonilho Pereira3
1

University of Beira Interior, Dept of Civil Engineering and Architecture, Calçada Fonte do Lameiro, 6201-001 Covilhã, Portugal. E-mail: [e-mail] 2 University of Beira Interior, Dept of Civil Engineering and Architecture, Calçada Fonte do Lameiro, 6201-001 Covilhã, Portugal. E-mail: [e-mail] 3 University of Beira Interior, Dept of Civil Engineering and Architecture, Calçada Fonte do Lameiro, 6201-001 Covilhã, Portugal. E-mail: [e-mail] Received 02 Nov 2005; accepted 06 Jan 2006
Abstract. This work presents the results of a comparative study of the sorptivity, accomplished in mixtures of selfcompacting concrete with different types of additives and a normal concrete compacted by vibration. The self-compacting concrete mixtures present slump-flow of 650 ± 50 mm and have the same cement contents. In the self-compacting mixtures, were used as additives, fly ash, silica fume, hydraulic lime and a mixture of fly ash and hydraulic lime. A modified carboxylates superplasticiser was used to obtain a specific workability. The capillary absorption was carried out at 7, 14 and 28 days of age, through a methodology described in the work. The results permit to conclude that the used additives propitiate the self-compacting concrete. In terms of capillary absorption, the mixtures with fly ash have a better performance. Keywords: capillarity, fly ash, hydraulic lime, water absorption, self-compacting concrete, silica fume, sorptivity.

1. Introduction In recent years, there is a growing interest in the use of self-compacting concrete (SCC), which provides an overall structure durability [1, 2]. The self-compacting

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(in Portuguese). 16. Nepomuceno, M. S, Oliveira, L.A.P. Self-compacting concrete properties (Propriedades do betão auto-compactável). Partial report of SCC mix subproject, University of Beira Interior, Covilhã, 2004. 53 p. (in Portuguese). 220 L. A. Pereira de Oliveira et al. / JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT – 2006, Vol XII, No 3, 215–220 SAVAIME SUSITANKINAN IO BETONO SU MINERALINIAIS PRIEDAIS GERTIES TYRIMAI L. A. Pereira de Oliveira, J. P. de Castro Gomes, C. N. Gonilho Pereira Santrauka Straipsnyje pateikti vairi savaime susitankinan io betono mišini su skirtingos r šies priedais gerties lyginam j tyrim rezultatai. Pastarieji lyginti su analogiškais rezultatais, gautais prastuoju vibravimu sutankintam betonui. Savaime susitankinan io betono mišinio slankumas yra 650 ± 50 mm. Skirtingiems betono mišiniams parinktas vienodas cemento kiekis. Mišiniams naudoti šie priedai: pelenai, silicio dulk s, gesintosios kalk s ir pelen bei gesint j kalki mišinys. Betono mišinio technologiškumui užtikrinti naudotas modifikuotasis superplastifikatorius. gertis matuota pra jus 7, 14 ir 28 paroms nuo kiet jimo pradžios, taikant darbe aprašyt metodik . Nustatyta, kad gerties poži riu mišiniai su pelenais yra veiksmingiausi. Reikšminiai žodžiai: kapiliarumas, pelenai, gesintosios kalk s, vandens sug rimas, savaime susitankinantis betonas, silicio dulk s, gertis. Luiz Antonio PEREIRA de OLIVEIRA. Associate Professor of civil engineering and architecture Dept at Engineering Faculty of the University of Beira Interior (Portugal). Member of the British Masonry Society, Rilem and Brazilian Concrete Institute. His research interests include the behaviour of structural masonry, self-compacting concrete, fiber reinforced concrete and waste recycled materials. João Paulo de CASTRO GOMES. Associate Professor of civil engineering and architecture Dept at Engineering Faculty of the University of Beira Interior (Portugal). He teaches materials scienc, his main research interests are the study and development of more durable, economical and environmental friendly cement and bitumen- based materials and structural solutions. Cristiana Nadir GONILHO PEREIRA. FCT (Foundation for the Science and Technology) researcher at the Centre of Science and Textile Technology, University of Minho (Portugal). She is also a PhD student in the Civil Engineer Dept, University of Minho (Portugal). Her research interests: concrete durability and concrete reinforcement and monitoring with braided reinforced composite elements. ė ė į ė ų ų ų ų ė ų ų ū į Į ų į ū ė ą ų į ė ą č ų ė į č Į Č