198 research outputs found
Durability evaluation of geopolymer and conventional concretes
No full textAbstract not availableM. Albitar, M.S. Mohamed Ali, P. Visintin, M. Drechsle
Bond slip models for uncorroded and corroded steel reinforcement in class-F fly ash geopolymer concrete
No full textAbstract not availableM. Albitar, P. Visintin, M. S. Mohamed Ali, O. Lavigne and E. Gambo
Effect of granulated lead smelter slag on strength of fly ash-based geopolymer concrete
No full textAbstract not availableM. Albitar, M.S. Mohamed Ali, P. Visintin, M. Drechsle
Behavior of FRP-HSC-steel double-skin tubular columns under cyclic axial compression
No full textAbstract not availableMohammad Albitar, Togay Ozbakkaloglu and Butje Alfonsius Louk Fangg
Significance of point mutation of ras gene(s) in the response of CMML to intensive chemotherapy
No full textEngineering properties of class-F fly ash based geopolymer concrete
No full textConcrete is the most utilized building material in the world. Ordinary Portland Cement (OPC) is a core ingredient in the manufacturing process of concrete. For every tonne of OPC produced, approximately one tonne of carbon dioxide is released into the atmosphere. Increasing environmental awareness means alternative binders are being considered in the ever growing demand for building construction. The development of geopolymer concrete aims to reduce the need for OPC concrete by using constituents that would otherwise be considered as industrial waste to form a binder. This study presents an experimental program aimed to develop an optimum mix design using fly ash. The engineering properties of this mix was tested, analyzed and compared with prediction models developed for OPC-based concrete. The comparison suggests that existing OPC models provide reasonably accurate predictions of the elastic moduli and stress-strain relationships, whereas they slightly underestimate flexural and splitting tensile strengths.M. Albitar, P. Visintin, M.S. Mohamed Al
Surface marker abnormalities in chronic myelomonocytic leukemia detected by multiparameter flow cytometry
No full textEngineering properties of slag-based geopolymer concrete
No full textGeopolymer concrete is manufactured from high-volume waste materials, such as fly ash from coal-burning power stations and can be altered by adding mineral admixtures, such as ground granulated slag or granulated lead smelter slag. The addition of these admixtures may lead to increase the compressive strength of fly ash, or reduce the amount of cementitious material in the binder, which in turn reduces costs and offers further environmental benefits. This paper presents an experimental study on the behavior of slag-based geopolymer concrete. The experimental program included 25 mix designs which were used to examine several parameters. The key parameters considered were the slag-to-fly ash ratio, slag-to-river sand ratio, alkaline solution-to-binder ratio and curing method. The mechanical properties were tested, analyzed and compared to the American Concrete Institute and Australian Standards set for ordinary Portland cement concrete in order to determine the similarities and differences. The results show that using partially slag as a binder of up to 75% can provide a normal concrete strength. The results concluded that the mechanical properties of the slag-based geopolymer concrete were similar to that of fly ash-based geopolymer concrete.M. Albitar, M.S. Mohamed Ali, P. Visinti
Loss of FHIT expression in acute lymphoblastic leukemia
No full textLoss of expression of the FHIT tumor suppressor gene is common in epithelial malignancies such as lung, kidney, esophageal, gastric, and cervical cancers. To assess the role of FHIT in acute leukemias, we examined 18 primary acute lymphoblastic leukemias (ALLs), 8 ALL-derived cell lines, 7 cell lines from other hematological malignancies, 14 lymphoblastoid cell lines, and 5 peripheral blood lymphocyte samples for expression of FHIT mRNA and protein by reverse transcription-PCR and Northern and Western blots. Fhit protein expression was detected in only 24% of primary ALLs and leukemia/lymphoma cell lines, but it was detected in all lymphoblastoid cell lines and peripheral blood lymphocyte samples. Interestingly, Fhit protein expression was lost in all T-cell ALLs but was lost in only half of the B- cell ALLs. Northern blotting of 7 normal lymphoblastoid cell lines and 13 of the neoplastic cell lines confirmed the results obtained by Western blotting regarding FHIT expression. The high frequency of loss of Fhit expression in ALLs suggests that inactivating alterations at the FHIT locus contribute to development of the leukemias
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