توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Investigating the effect of chloride ion permeability on corrosion of reinforcement in reinforced concrete andthe case study of ground level water storage reservoirs in the central region of Gilan Province
اطلاعات انتشار: دومین کنفرانس بین المللی دستاوردهای نوین در علوم مهندسی و پایه، سال
تعداد صفحات: ۷
Corrosion of steel in concrete is a major problem in different countries around the world. Sometimes, dueto the weakness and inadequacy of designs and the more critical conditions than the initial predictions, concretestructures are exposed to serious damages, including corrosion; so that the corrosion of reinforcement has becomeone of the main reasons for the deterioration of concrete structures around the world. If the problem is not controlledproperly, it can lead to detrimental effects on the costs of maintenance and repair of damaged sections. In general, inthis research, 5 reservoirs in the central region of Guilan province (Kapurchal, Pir Bazar, Fakhrabad, Gilva Dashtanand talem seshanbe) that were subjected to chloride ion and suffered from corrosion, were selected to be examinedand evaluated; also, the tests of determination of chloride ion profile and diffusion coefficient were performed foreach of the reservoirs. Finally, some methods of repair and rehabilitation of these structures were discussed.<\div>

۲Effectiveness of nano–TiO2 and fly ash in concrete
اطلاعات انتشار: دومین کنفرانس بین المللی دستاوردهای نوین در علوم مهندسی و پایه، سال
تعداد صفحات: ۷
High performance concrete (HPC) offers several advantages over normal–strength concrete, namely,high mechanical strength and high durability. Therefore, HPC allows for concrete structures with less steelreinforcement and a longer service life, both of which are crucial issues in the eco–efficiency of constructionmaterials. Nevertheless, international publications in the field of concrete with nanoparticles are scarce whencompared to concrete total international publications (around 1%). HPC nanoparticle based publications are evenscarcer. This article presents results of an experimental investigation on the mechanical properties and durabilityof HPC based on nano–TiO2 and fly ash. The durability performance was assessed by means of water absorptionby immersion, electric resistivity. The results show that the concretes with nano–TiO2 increased content showdecreased durability performance. The results also show that a concrete with 1% nano–TiO2 and 30% fly ash forPortland cement replacement showed a high mechanical strength (C55\C67) and a high durability. However, thecost of nano–TiO2 is responsible for a severe increase in the cost of concrete mixtures.<\div>
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