List of Articles Alireza Mardookhpour

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  1 - Experimental Study of Modulus of Elasticity, Capillary absorption of water and UPV in Nature-Friendly Concrete Based on Geopolymer Materials
  Mohammadhossein Mansourghanaei Morteza Biklaryan Alireza Mardookhpour
  10.1007/ijase.2023.698294
  In the current study, granulated blast furnace slag (GBFS) based geopolymer concrete (GPC) was used with 0-2% polyolefin fibers (POFs) and 0-8% Nano silica (NS) to improve its structure. After curing the specimens under dry conditions at a temperature of 60 °C in an More

  In the current study, granulated blast furnace slag (GBFS) based geopolymer concrete (GPC) was used with 0-2% polyolefin fibers (POFs) and 0-8% Nano silica (NS) to improve its structure. After curing the specimens under dry conditions at a temperature of 60 °C in an oven, they were subjected to Modulus of elasticity and Ultrasonic Pulse Velocity (UPV) tests to evaluate their mechanical properties, as well as Capillary absorption test to assess their durability. all tests were performed at 7 and 90 days of age at ambient temperature (20 ℃). The addition of NS enhanced the whole properties of the GBFS based GPC. Increasing the curing age improved the results of all tests. The results of all tests in GPC showed the superiority of the results over conventional concrete. At 28 days of curing age, the addition of up to 8% NS to the GPC composition improved the modulus of elasticity test results by 14.7%, UPV by 84.88% and capillary water uptake by 64.38%. Addition of up to 2% of POFs to the GPC composition improved the modulus of elasticity by up to 7.21%, capillary water uptake by up to 22.97% and decreased UPV by up to 8.77%. In the following, by conducting the SEM test, a microstructure investigation was carried out on the concrete samples. In addition to their overlapping with each other, the results indicate the GPC superiority over the regular concrete. Besides, it demonstrated the positive influence of NS addition on the concert microstructure. Manuscript profile
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  2 - Numerical Investigation of the Effect of Concrete Injection on the Concrete Joints of the Arched Dam, Under the Applied Stresses
  Mohammadhossein Mansourghanaei Alireza Mardookhpour
  10.30495/ijase.2023.705234
  Numerical Investigation of the Effect of Concrete Injection on the Concrete Joints of the Arched Dam, Under the Applied StressesAbstract Investigating the safety of dams is of great importance given their critical role in the industry and economy of countries and the ca More

  Numerical Investigation of the Effect of Concrete Injection on the Concrete Joints of the Arched Dam, Under the Applied StressesAbstract Investigating the safety of dams is of great importance given their critical role in the industry and economy of countries and the catastrophic consequences of their failure. Hence, the present paper examines the impact of incomplete contraction joint injection in the Karun 4 double-curvature arch dam as a case study. In this article, the Abaqus 6.12 finite element software was used to model and analyze 3 numerical models of the Karun 4 dam. These models consist of a linear, integrated, and homogeneous model and two nonlinear models considering the nonlinear behavior resulting from two different types of common contraction joints in the dam's body. The results indicated that a lack of injection led to a significant increase in the maximum principal stresses (MPa) at the upstream section of the dam, such that a large part of this section, which originally worked under compression, is now under tension. The tensile stresses at the upstream abutment and the downstream crest also increased. Moreover, a lack of injection considerably increased the vertical compressive stresses between the contact surfaces (µ). These stresses were increased almost twofold near the injection stop level such that the stresses between monolith zero and one increased from a maximum of 5.13 under complete injection to 11.3. According to the results, with an increase in the joint thickness under the absence of joint injection, considerable amounts (of stress) are added to the maximum principal stresses, minimum principal stresses, dam displacement, and the vertical compressive force between the contact surfaces. Manuscript profile