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    Analysis of shrinkage and creep behaviors in polymer-coated lightweight concretes
    (Walter De Gruyter Gmbh, 2016) Bideci, Alper; Bideci, Ozlem Salli; Oymael, Sabit; Yildirim, Hasan
    The creep and shrinkage properties of polymer-coated lightweight concretes were examined. Five-hundred-dose lightweight concretes were produced by coating pumice aggregates with three different polymers (Sonomeric1: SNMC, KB Pur 214: KBP, and Polipol3455: PLP). The 3-, 7-, and 28-day compressive strength values of the obtained lightweight concrete samples were determined, and the 840-h and 12-month creep and shrinkage deformations were measured. It was found that the ductility of the SNMC- and KBP-coated concrete samples increased, while their shrinkage deformation results decreased when compared with the control samples. In contrast, the ductility of PLP concrete samples decreased and the shrinkage deformation became higher. In conclusion, the use of SNMC- and KBP-coated pumice aggregates had a positive effect on the creep and shrinkage properties of the concrete. Furthermore, it was observed that the compressive strength values of the lightweight concretes made of the coated samples were higher than those of the control sample.
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    Internal structure examination of lightweight concrete produced with polymer-coated pumice aggregate
    (Elsevier Sci Ltd, 2013) Bideci, Alper; Gultekin, Ali Haydar; Yildirim, Hasan; Oymael, Sabit; Bideci, Ozlem Salli
    In the construction sector, pumice is observed to be used in both structural and non-structural building elements. In this study, to produce a new kind of concrete, the aggregates are coated with three different polymers (Sonomeric1 : SNMC, KB Pur 214: KBP and Polipol3455: PLP) that have multiple uses. The mineralogical-petrographical features of both polymer-coated and uncoated aggregates were examined, and SEM (Scanning Electron Microscope) and XRD (X-ray Diffraction) analyses were performed. Moreover, in the study, lightweight concrete elements with different dosages (300, 400 and 500) were produced by using polymer-coated and uncoated aggregates; and their internal structure examinations were performed and compressive strength values of 3, 7 and 28 days samples were investigated. As a conclusion; among the aggregate samples, it was determined that PLP-coated aggregates have a more porous structure than the other polymer-coated aggregates and KBP-coated aggregates could be used in lightweight concrete (500 dosage) production. It was also concluded that the compressive strength values of lightweight concrete elements produced with coated samples increased even more. (C) 2013 Elsevier Ltd. All rights reserved.
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    Polymer coated pumice aggregates and their properties
    (Elsevier Sci Ltd, 2014) Bideci, Ozlem Salli; Bideci, Alper; Gultekin, All Haydar; Oymael, Sabit; Yildirim, Hasan
    Pumices which are preferred due to their properties such as low unit weight, heat insulation property, resistance against fire were combined with polymer, the material of our age, to produce light concrete aggregate. In the study, pumice aggregate was coated by some polymers which are used for various purposes (Sonomeric1: SNMC, KBPur 214: KBP and Polipol3455: PLP) and the inner-structure examinations of the obtained aggregates was made by microscope and also specific weight, loose unit weight and water absorption experiments were applied. At the end of the study, the properties of pumice aggregates having high water absorption capability were developed and light aggregate production was realized. (C) 2014 Elsevier Ltd. All rights reserved.