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Mostafa Kazemi
GeMMe Building Materials, Urban and Environmental Engineering (UEE), University of Liege, 4000 Liège, Belgium

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Journal article
Published: 30 July 2021 in Energy and Buildings
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Alternative materials exist for green roof layers: secondary resources like coarse or fine recycled aggregates may be used as a substitute to natural materials. For using these new types of materials, it is needed to assess their heat resistance which is performed according to ISO 9869-1 standard. Moreover, the initial hygrothermal conditions of unsaturated substrate and drainage layers have also to be modelled and assessed for optimizing the layers’ thickness. In this study, the green roofs with unsaturated substrate and drainage layers incorporating coarse recycled materials were tested and assessed. The hygrothermal conditions of unsaturated substrate and drainage layers were simulated using WUFI software. A small difference (4.2%) was observed between the Rc-value of the green roofs with and without coarse recycled materials, confirming that these materials provided a sufficient thermal resistance, similar to soil particles for the substrate layer. Considering a constant thickness for the substrate layer (15 cm), a 6-cm drainage layer with coarse aggregates was considered as the optimum design for green roof systems. Besides, 18-cm unsaturated substrate layer was the optimum design when the drainage layer’ thickness was considered constant (5 cm). The 6-cm drainage layer and 18-cm unsaturated substrate layer were definitely the best design for the roofing systems with the simultaneous change in the substrate and drainage layers’ thickness.

ACS Style

Mostafa Kazemi; Luc Courard. Modelling hygrothermal conditions of unsaturated substrate and drainage layers for the thermal resistance assessment of green roof: Effect of coarse recycled materials. Energy and Buildings 2021, 250, 111315 .

AMA Style

Mostafa Kazemi, Luc Courard. Modelling hygrothermal conditions of unsaturated substrate and drainage layers for the thermal resistance assessment of green roof: Effect of coarse recycled materials. Energy and Buildings. 2021; 250 ():111315.

Chicago/Turabian Style

Mostafa Kazemi; Luc Courard. 2021. "Modelling hygrothermal conditions of unsaturated substrate and drainage layers for the thermal resistance assessment of green roof: Effect of coarse recycled materials." Energy and Buildings 250, no. : 111315.

Journal article
Published: 24 June 2021 in Sustainability
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A green roof is composed of a substrate and drainage layers which are fixed on insulation material and roof structure. The global heat resistance (Rc) within a green roof is affected by the humidity content of the substrate layer in which the coarse recycled materials can be used. Moreover, the utilization of recycled coarse aggregates such as incinerated municipal solid waste aggregate (IMSWA) for the drainage layer would be a promising solution, increasing the recycling of secondary resources and saving natural resources. Therefore, this paper aims to investigate the heat transfer across green roof systems with a drainage layer of IMSWA and a substrate layer including recycled tiles and bricks in wet and dry states according to ISO-conversion method. Based on the results, water easily flows through the IMSWAs with a size of 7 mm. Meanwhile, the Rc-value of the green roof system with the dry substrate (1.26 m2 K/W) was 1.7 times more than that of the green roof system with the unsaturated substrate (0.735 m2 K/W). This means that the presence of air-spaces in the dry substrate provided more heat resistance, positively contributing to heat transfer decrease, which is also dependent on the drainage effect of IMSWA. In addition, the Rc-value of the dry substrate layer was about twice that of IMSWA as the drainage layer. No significant difference was observed between the Rc-values of the unsaturated substrate layer and the IMSWA layer.

ACS Style

Mostafa Kazemi; Luc Courard; Julien Hubert. Heat Transfer Measurement within Green Roof with Incinerated Municipal Solid Waste Aggregates. Sustainability 2021, 13, 7115 .

AMA Style

Mostafa Kazemi, Luc Courard, Julien Hubert. Heat Transfer Measurement within Green Roof with Incinerated Municipal Solid Waste Aggregates. Sustainability. 2021; 13 (13):7115.

Chicago/Turabian Style

Mostafa Kazemi; Luc Courard; Julien Hubert. 2021. "Heat Transfer Measurement within Green Roof with Incinerated Municipal Solid Waste Aggregates." Sustainability 13, no. 13: 7115.

Research article
Published: 21 January 2021 in Science and Technology for the Built Environment
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The outdoor seasonal weather conditions can influence the insulation performance of extensive green roof. In addition, the thermal behavior of extensive green roof can be affected by the thickness of its layers including substrate and drainage layer. On the other hand, the replacement of polyethylene modular panel with porous aggregates as drainage layer can affect the water retention capacity of green roof. Therefore, in this study, the green roofs with pozzolana (porous volcanic gravel) as drainage layer under constant and variable inside temperatures were modeled and subjected to the weather conditions of winter and summer to assess the humidity and temperature variations in the depth of the systems. The results showed that there was a decrease in temperature through the depth of the green roof system for the winter period, while the reverse occurred for the relative humidity. During the winter period, the green roof model with the 10-cm substrate and 8-cm pozzolana was recommended to be used. However, the model with the 8-cm substrate and 6-cm drainage layer had the best insulation performance, particularly for the summer period. Moreover, the internal ceiling temperature fluctuation of system under variable inside temperature was higher than that under constant inside temperature.

ACS Style

Mostafa Kazemi; Luc Courard. Simulation of humidity and temperature distribution in green roof with pozzolana as drainage layer: Influence of outdoor seasonal weather conditions and internal ceiling temperature. Science and Technology for the Built Environment 2021, 27, 509 -523.

AMA Style

Mostafa Kazemi, Luc Courard. Simulation of humidity and temperature distribution in green roof with pozzolana as drainage layer: Influence of outdoor seasonal weather conditions and internal ceiling temperature. Science and Technology for the Built Environment. 2021; 27 (4):509-523.

Chicago/Turabian Style

Mostafa Kazemi; Luc Courard. 2021. "Simulation of humidity and temperature distribution in green roof with pozzolana as drainage layer: Influence of outdoor seasonal weather conditions and internal ceiling temperature." Science and Technology for the Built Environment 27, no. 4: 509-523.

Research article
Published: 11 December 2020 in Advances in Building Energy Research
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The use of recycled materials and porous aggregates such as rubber crumbs and volcanic gravel (pozzolana) for the drainage layer can lead to improving thermal behaviour of the green roofs. On the other hand, the thermal performances of green roofs can be affected by the thickness of substrate and drainage layer. Therefore, the main objective of this study was to adapt modelling characteristics for different thicknesses of substrate and drainage layers used under constant and variable temperatures and solar radiation: specific rubber crumbs and volcanic gravel behaviour has been modelled. The simultaneous heat and moisture transfers within the green roof were estimated as well. According to the results, the 9 cm substrate was recommended to be used for the green roofs, once the thickness of drainage layer was 4 cm. Moreover, the optimum thickness of pozzolana and rubber crumbs as drainage layer was 6 and 7 cm, respectively, once the thickness of the substrate was kept constant (5 cm). By increasing the thickness of substrate and drainage layers, the fluctuation of internal ceiling temperature in the green roof models with the presence of humidity decreased, but not as much as that in the green roof models without the presence of humidity.

ACS Style

Mostafa Kazemi; Luc Courard. Modelling thermal and humidity transfers within green roof systems: effect of rubber crumbs and volcanic gravel. Advances in Building Energy Research 2020, 1 -26.

AMA Style

Mostafa Kazemi, Luc Courard. Modelling thermal and humidity transfers within green roof systems: effect of rubber crumbs and volcanic gravel. Advances in Building Energy Research. 2020; ():1-26.

Chicago/Turabian Style

Mostafa Kazemi; Luc Courard. 2020. "Modelling thermal and humidity transfers within green roof systems: effect of rubber crumbs and volcanic gravel." Advances in Building Energy Research , no. : 1-26.

Articles
Published: 10 March 2020 in Journal of Sustainable Cement-Based Materials
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An appropriate amount of polypropylene fibre (PF) content is generally able to compensate for the low compressive strength of the recycled aggregate concrete. This mechanical strength is required to reliably estimate at the building site using partially and non-destructive testing methods. Therefore, in the present study, the compressive strength of concrete with PF at 0.1% by volume and different replacement levels of recycled coarse aggregate (RCA) was assessed using point load test (PLT) and Schmidt rebound hammer. According to the results, the sensitivity of the core specimens to the concentrated point load and the short size of PF in the failure zone of the PLT caused to appear a difference among the enhancement trends of PLI values by increasing the age. In addition, a two-variable equation between the rebound number and point load index (PLI) reliably predicted either strength of coarse natural concrete or recycled aggregate concrete or PRAC.

ACS Style

Mostafa Kazemi; Mohammad Hajforoush; Pouyan Khakpour Talebi; Mohammad Daneshfar; Ali Shokrgozar; Soheil Jahandari; Mohammad Saberian; Jie Li. In-situ strength estimation of polypropylene fibre reinforced recycled aggregate concrete using Schmidt rebound hammer and point load test. Journal of Sustainable Cement-Based Materials 2020, 9, 289 -306.

AMA Style

Mostafa Kazemi, Mohammad Hajforoush, Pouyan Khakpour Talebi, Mohammad Daneshfar, Ali Shokrgozar, Soheil Jahandari, Mohammad Saberian, Jie Li. In-situ strength estimation of polypropylene fibre reinforced recycled aggregate concrete using Schmidt rebound hammer and point load test. Journal of Sustainable Cement-Based Materials. 2020; 9 (5):289-306.

Chicago/Turabian Style

Mostafa Kazemi; Mohammad Hajforoush; Pouyan Khakpour Talebi; Mohammad Daneshfar; Ali Shokrgozar; Soheil Jahandari; Mohammad Saberian; Jie Li. 2020. "In-situ strength estimation of polypropylene fibre reinforced recycled aggregate concrete using Schmidt rebound hammer and point load test." Journal of Sustainable Cement-Based Materials 9, no. 5: 289-306.

Journal article
Published: 01 February 2020 in Structures
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ACS Style

Mostafa Kazemi; Jie Li; Salar Lahouti Harehdasht; Negin Yousefieh; Soheil Jahandari; Mohammad Saberian. Non-linear behaviour of concrete beams reinforced with GFRP and CFRP bars grouted in sleeves. Structures 2020, 23, 87 -102.

AMA Style

Mostafa Kazemi, Jie Li, Salar Lahouti Harehdasht, Negin Yousefieh, Soheil Jahandari, Mohammad Saberian. Non-linear behaviour of concrete beams reinforced with GFRP and CFRP bars grouted in sleeves. Structures. 2020; 23 ():87-102.

Chicago/Turabian Style

Mostafa Kazemi; Jie Li; Salar Lahouti Harehdasht; Negin Yousefieh; Soheil Jahandari; Mohammad Saberian. 2020. "Non-linear behaviour of concrete beams reinforced with GFRP and CFRP bars grouted in sleeves." Structures 23, no. : 87-102.

Journal article
Published: 01 November 2019 in Construction and Building Materials
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ACS Style

Mostafa Kazemi; Rahmat Madandoust; Jorge de Brito. Compressive strength assessment of recycled aggregate concrete using Schmidt rebound hammer and core testing. Construction and Building Materials 2019, 224, 630 -638.

AMA Style

Mostafa Kazemi, Rahmat Madandoust, Jorge de Brito. Compressive strength assessment of recycled aggregate concrete using Schmidt rebound hammer and core testing. Construction and Building Materials. 2019; 224 ():630-638.

Chicago/Turabian Style

Mostafa Kazemi; Rahmat Madandoust; Jorge de Brito. 2019. "Compressive strength assessment of recycled aggregate concrete using Schmidt rebound hammer and core testing." Construction and Building Materials 224, no. : 630-638.

Journal article
Published: 01 October 2019 in Construction and Building Materials
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ACS Style

Rahmat Madandoust; Mostafa Kazemi; Pouyan Khakpour Talebi; Jorge de Brito. Effect of the curing type on the mechanical properties of lightweight concrete with polypropylene and steel fibres. Construction and Building Materials 2019, 223, 1038 -1052.

AMA Style

Rahmat Madandoust, Mostafa Kazemi, Pouyan Khakpour Talebi, Jorge de Brito. Effect of the curing type on the mechanical properties of lightweight concrete with polypropylene and steel fibres. Construction and Building Materials. 2019; 223 ():1038-1052.

Chicago/Turabian Style

Rahmat Madandoust; Mostafa Kazemi; Pouyan Khakpour Talebi; Jorge de Brito. 2019. "Effect of the curing type on the mechanical properties of lightweight concrete with polypropylene and steel fibres." Construction and Building Materials 223, no. : 1038-1052.

Original paper
Published: 02 September 2019 in Asian Journal of Civil Engineering
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The present study intended to evaluate the dynamic behaviour of steel ring filled with compressive plastic (SRP) or high-performance fibre-reinforced cementitious composites (SRC) situated at the intersection of the braces. High-performance fibre-reinforced cementitious composites and plastic materials, associated with steel ring connection, seem to be helpful to dissipate the energy through braces better. Therefore, in this paper, the behaviour of SRC and SRP connections was analyzed under cyclic loading. Results showed a steady and relatively wide hysteresis curve for both connections, where the tensile ductility factors of SRP and SRC connections were found to be equal to 2.77 and 13.66, respectively. However, in general, the plastic ring, being operated efficiently to delay appearing the inelastic zone in the SRP connection, was proved to outperform the HPFRCC material in the SRC connection. In addition, numerical results revealed that maximum tensile and compressive loads of SRP connection made with ST52 steel ring were found to be 14% and 10.7%, respectively, higher than those of SRP connection made with ST37 steel ring.

ACS Style

Mostafa Kazemi; Mohammad Ali Kafi; Mohammad Hajforoush; Ali Kheyroddin. Cyclic behaviour of steel ring filled with compressive plastic or concrete, installed in the concentric bracing system. Asian Journal of Civil Engineering 2019, 21, 29 -39.

AMA Style

Mostafa Kazemi, Mohammad Ali Kafi, Mohammad Hajforoush, Ali Kheyroddin. Cyclic behaviour of steel ring filled with compressive plastic or concrete, installed in the concentric bracing system. Asian Journal of Civil Engineering. 2019; 21 (1):29-39.

Chicago/Turabian Style

Mostafa Kazemi; Mohammad Ali Kafi; Mohammad Hajforoush; Ali Kheyroddin. 2019. "Cyclic behaviour of steel ring filled with compressive plastic or concrete, installed in the concentric bracing system." Asian Journal of Civil Engineering 21, no. 1: 29-39.

Original paper
Published: 03 December 2018 in Asian Journal of Civil Engineering
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A study was performed to assess the effects of magnetic water with different percentages of natural zeolite (NZ) on self-compacting concrete (SCC) mixes. Over the past decades, a limited number of studies were conducted by researches on the effects of magnetic water on SCC mixes. In addition, it seems that pozzolanic materials such as NZ can affect performance of magnetic water in SCC mixes. Following this, the present study was aimed to survey engineering properties of self-compacting concrete (SCC) containing magnetic water and NZ. To achieve this goal, slump flow, T50, V-funnel, L-box and visual stability index (VSI) were employed to evaluate the rheological properties of concrete mixes. Furthermore, hardened properties were investigated by compressive strength, splitting tensile strength, modulus of elasticity and water absorption tests. The concrete test results demonstrated that 20% NZ inclusion and magnetic water in SCC with the water–binder (W/B) ratio of 0.37 led to an optimum mix design and also this mixture could contribute to an increase in compressive strength, splitting tensile strength and modulus of elasticity up to 25, 8 and 9%, respectively.

ACS Style

Mohammad Hajforoush; Rahmat Madandoust; Mostafa Kazemi. Effects of simultaneous utilization of natural zeolite and magnetic water on engineering properties of self-compacting concrete. Asian Journal of Civil Engineering 2018, 20, 289 -300.

AMA Style

Mohammad Hajforoush, Rahmat Madandoust, Mostafa Kazemi. Effects of simultaneous utilization of natural zeolite and magnetic water on engineering properties of self-compacting concrete. Asian Journal of Civil Engineering. 2018; 20 (2):289-300.

Chicago/Turabian Style

Mohammad Hajforoush; Rahmat Madandoust; Mostafa Kazemi. 2018. "Effects of simultaneous utilization of natural zeolite and magnetic water on engineering properties of self-compacting concrete." Asian Journal of Civil Engineering 20, no. 2: 289-300.

Original paper
Published: 28 August 2018 in Asian Journal of Civil Engineering
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The main purpose of this paper is to predict the in situ compressive strength of concrete by means of point load strength test as a partially destructive test method. This test method is examined by extracting core specimen from concrete blocks and applying two point loads to the lateral surface of the core specimen. The failure in the core specimen occurred in the direction of applying load where most normal stresses are tensile, while some compressive stresses are generated in the contact surface of load cell with the core specimen. In this study, point load index (PLI) in which a force is divided by the square of the distance between the platen points and cube compressive strength was determined under wet and dry curing conditions at the ages of 7, 14, 28 and 42 days. The effects of various parameters such as core diameter and length to diameter (L/D) ratio were considered experimentally and numerically by means of finite element method using ABAQUS software. A three-dimensional finite element model was constructed to study the stress magnitude and stress distribution at the failure surface. The results showed that the PLI in wet curing conditions were about 12% higher than those in dry curing conditions. In addition, The PLI increased particularly steep when the L/D ratio is less than 1, while then becomes less steep when the L/D ratio is between 1 and 1.8. Meanwhile, it seems that there is no significant difference among PLI values for the ratios of L/D more than 1.8.

ACS Style

Rahmat Madandoust; Zeynab Fallah Zarjoo Bazkiyaei; Mostafa Kazemi. Factor influencing point load tests on concrete. Asian Journal of Civil Engineering 2018, 19, 937 -947.

AMA Style

Rahmat Madandoust, Zeynab Fallah Zarjoo Bazkiyaei, Mostafa Kazemi. Factor influencing point load tests on concrete. Asian Journal of Civil Engineering. 2018; 19 (8):937-947.

Chicago/Turabian Style

Rahmat Madandoust; Zeynab Fallah Zarjoo Bazkiyaei; Mostafa Kazemi. 2018. "Factor influencing point load tests on concrete." Asian Journal of Civil Engineering 19, no. 8: 937-947.

Journal article
Published: 01 January 2018 in Construction and Building Materials
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ACS Style

Majid Gholhaki; Ali Kheyroddin; Mohammad Hajforoush; Mostafa Kazemi. An investigation on the fresh and hardened properties of self-compacting concrete incorporating magnetic water with various pozzolanic materials. Construction and Building Materials 2018, 158, 173 -180.

AMA Style

Majid Gholhaki, Ali Kheyroddin, Mohammad Hajforoush, Mostafa Kazemi. An investigation on the fresh and hardened properties of self-compacting concrete incorporating magnetic water with various pozzolanic materials. Construction and Building Materials. 2018; 158 ():173-180.

Chicago/Turabian Style

Majid Gholhaki; Ali Kheyroddin; Mohammad Hajforoush; Mostafa Kazemi. 2018. "An investigation on the fresh and hardened properties of self-compacting concrete incorporating magnetic water with various pozzolanic materials." Construction and Building Materials 158, no. : 173-180.

Journal article
Published: 01 October 2017 in Construction and Building Materials
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ACS Style

Rahmat Madandoust; Mostafa Kazemi. Numerical analysis of break-off test method on concrete. Construction and Building Materials 2017, 151, 487 -493.

AMA Style

Rahmat Madandoust, Mostafa Kazemi. Numerical analysis of break-off test method on concrete. Construction and Building Materials. 2017; 151 ():487-493.

Chicago/Turabian Style

Rahmat Madandoust; Mostafa Kazemi. 2017. "Numerical analysis of break-off test method on concrete." Construction and Building Materials 151, no. : 487-493.