List of Articles Abdolkarim Abbasi Dezfouli

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  1 - Investigating the Effect of Galvanized Steel Rebars on Preventing Steel Corrosion in Reinforced Concrete
  mohammadreza hesabi abdolkarim abbasi dezfouli
  20.1001.1.23456310.1396.14.4.3.0
  Corrosion of steel in concrete is one of the most important factors in the destruction and destruction of concrete structures around the world. Even in advanced countries, this is a year-long issue that will cost a lot of maintenance and maintenance of concrete structur More

  Corrosion of steel in concrete is one of the most important factors in the destruction and destruction of concrete structures around the world. Even in advanced countries, this is a year-long issue that will cost a lot of maintenance and maintenance of concrete structures that are sensitive and insensitive to national and national resources. These damage are more severe in the Gulf countries, and many concrete structures have been corroded and damaged. Studies show that the main corrosion agent of reinforced concrete structures is corrosion of steel joints. Therefore, all corners of buildings and structures in corrosive areas should be adequately protected against corrosion. Separating the rebar from the environment and insulating it in terms of contact with corrosive agents is one of the solutions to prevent corrosion and durability of reinforced concrete. Different methods have been proposed for this purpose. In this study, it has been shown that the use of Galvanized reinforcement prevents the corrosion of reinforced concrete meshes effectively and, as a result, reinforced concrete will have a much higher resistance to corrosive environmental factors, such as chloride and sulfate attack. Also, economically, the results show that the cost of using galvanized rebars in sensitive industrial structures, such as oil tanks, is about 6 percent of the total cost, and in conventional buildings, between 1 and 2 percent of the total cost, which is also cost-effective in this regard. Therefore, the use of galvanized bars as a main and effective tool for protecting steel corrosion can be considered by the construction industry. Manuscript profile
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  2 - An investigation into the properties of concrete made from concrete debris and effects of the three-step mixing procedure on it
  Mohammad Khazaei Abdolkarim Abbasi Dezfouli
  10.30495/civil.2022.696768
  20.1001.1.28210999.1401.19.3.3.8
  Using by-product materials in making concrete is the recent development in the advanced concrete technology. The products obtained from experimental crushed concrete can be used in constructing the new concrete. Recent research revealed that using crushed concrete as pa More

  Using by-product materials in making concrete is the recent development in the advanced concrete technology. The products obtained from experimental crushed concrete can be used in constructing the new concrete. Recent research revealed that using crushed concrete as partial replacement of sand and coarse aggregate, using traditional mixing procedure, reduced the compressive strength. In the present research, the special procedure of mixing concrete in three steps and its effect on concrete strength parameters have been evaluated.  The aim of this study is to use crushed tested concrete as partial replacement 25% (mix A) and 50% (mix B) of conventional sand and aggregate. Also for experimental comparison the control mixes were casted with traditional sand and aggregate.  Superplasticizer based on carboxylate was used in the mixes.  This procedure causes proper efficiency, proper coating on the aggregate and protection of the alkaline reaction of the aggregate. The method of mixing was carried out in three steps 1: Coarse aggregate + 50% water + 50% cement: mixing time 30 seconds to 1 minute, step 2: Adding 50% cement + 25% water + superplasticizer + sand: mixing time 2 minutes, step 3: Adding 25% water: mixing time 3 minutes. All the mixing time is about 6 minutes. Six specimens of 15 cm concrete cubes for each designed mixes were casted. Densities, water absorption, electric resistance (an indication of permeability and durability of concrete) and compressive strength tests were carried out. Tests were performed at 7 and 28 days. As a result, the designed mix (A) presented the higher electric resistance and compressive strength at 28 days. According to the obtained appropriate resistance, it can be deduced that with a special mixing method, crushed concrete can be used in the composition of concrete that is cost-effective in terms of environmental and resistance. Manuscript profile
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  3 - Evaluation of Rheological and Mechanical Properties of Lightweight Concrete Containing Different Percentages of Polypropylene and Zeolite Fibers
  Abdolkarim Abbasi Dezfouli Rezbeh Aghajary
  10.30495/civil.2021.686627
  20.1001.1.23456310.1400.18.3.4.7
  Lightweight concrete is one of the most important and efficient materials in the modern construction industry and has a variety of applications. Proper application of lightweight concrete can have many positive influences on the construction process of concrete structur More

  Lightweight concrete is one of the most important and efficient materials in the modern construction industry and has a variety of applications. Proper application of lightweight concrete can have many positive influences on the construction process of concrete structures. The possibility of application in the most geographical regions, utility of natural and cheap materials, high speed, low cost compared to the large volume of operations and its ductility due to the geometric shapes of the design, good performance and very high resistance, resistant to compressive forces and tensile strength, energy absorption and cracking stability are the prominent features of lightweight structural concretes. The main purpose of this research was to investigate the rheological and mechanical properties of the lightweight concrete containing different percentages of zeolite and polypropylene fiber separately. In this research, applying laboratory method, the rheological properties of fresh lightweight concrete (soft concrete) and the mechanical properties of hardened lightweight concrete at the ages of 7 and 28 days have been evaluated. According to ASTMC 39 standard, two samples of lightweight concrete without zeolite and polypropylene at the ages of 7 and 28 days have been prepared and mechanically evaluated. Then, in continuation of preparing of the light concrete samples prepared based on ASTMC 39 standard, three mixing designs with different percentages of polypropylene fibers (0.9, 1 and 1.1%) and 3 mixing designs with different percentages of zeolite (5, 10 and 15%) , at the mentioned ages were examined and compared with the base samples in the laboratory, which resulted in the following findings: Lightweight concrete samples containing zeolite had a higher electrical resistance than lightweight concrete samples containing polypropylene and the highest compressive strength was related to lightweight concrete samples containing 15% zeolite. This is equivalent to 400.75 kg / cm3 at the age of 28 days. Manuscript profile
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  4 - Evaluation and Research on the methods of manufacturing and mixing of various types of smart concrete
  Abdolkarim Abbasi Dezfouli
  20.1001.1.23456310.1399.17.4.6.4
  Smart concrete refers to structural materials that can sense and respond appropriately to changes in their environment. This is done by changing one or more parameters. The smart properties of concrete are usually achieved by modifying and upgrading the concrete mix des More

  Smart concrete refers to structural materials that can sense and respond appropriately to changes in their environment. This is done by changing one or more parameters. The smart properties of concrete are usually achieved by modifying and upgrading the concrete mix design and matrix. It is mainly obtained by improving the composition of initional materials or adding functional materials to concrete. This concrete also has bionic (biological) characteristics. Compared to conventional concrete, properly designed smart concrete can be utilized to optimize the safety, durability and proper performance of infrastructure and reducing of the maintenance costs. The costs of use, resource consumption and environmental pollution, which are the basic parameters for construcction, will be reduced. Over the past few decades, significant efforts have been made to research smart concrete and many innovative achievements in the development and application of smart concrete are obtained. Thirteen types of smart concrete, with emphasis on their capabilities, are systematically investigated in this article, which is based on the principles, composition, construction, properties, research development and structural applications. In addition, some perspectives on the development of smart concrete are discussed. Finally, thirteen compositions of smart concrete were organized into a Table. Manuscript profile