A review on pavement porous concrete using recycled waste materials

Toghroli, Ali,Shariati, Mahdi,Sajedi, Fathollah,Ibrahim, Zainah,Koting, Suhana,Mohamad, Edy Tonnizam,Khorami, Majid 국제구조공학회 2018 Smart Structures and Systems, An International Jou Vol.22 No.4

Pavements porous concrete is a noble structure design in the urban management development generally enabling water to be permeated within its structure. It has also capable in the same time to cater dynamic loading. During the technology development, the quality and quantity of waste materials have led to a waste disposal crisis. Using recycled materials (secondary) instead of virgin ones (primary) have reduced landfill pressure and extraction demanding. This study has reviewed the waste materials (Recycled crushed glass (RCG), Steel slag, Steel fiber, Tires, Plastics, Recycled asphalt) used in the pavement porous concretes and report their respective mechanical, durability and permeability functions. Waste material usage in the partial cement replacement will cause the concrete production cost to be reduced; also, the concretes' mechanical features have slightly affected to eliminate the disposal waste materials defects and to use cement in Portland cement (PC) production. While the cement has been replaced by different industrial wastes, the compressive strength, flexural strength, split tensile strength and different PC permeability mixes have depended on the waste materials' type applied in PC production.

Evaluation of the parameters affecting the Schmidt rebound hammer reading using ANFIS method

Ali Toghroli,Ehsan Darvishmoghaddam,Yousef Zandi,Mahdi Parvan,Maryam Safa,Mu’azu Mohammed Abdullahi,Abbas Heydari,Karzan Wakil,Saad A.M. Gebreel,Majid Khorami 사단법인 한국계산역학회 2018 Computers and Concrete, An International Journal Vol.21 No.5

As a nondestructive testing method, the Schmidt rebound hammer is widely used for structural health monitoring. During application, a Schmidt hammer hits the surface of a concrete mass. According to the principle of rebound, concrete strength depends on the hardness of the concrete energy surface. Study aims to identify the main variables affecting the results of Schmidt rebound hammer reading and consequently the results of structural health monitoring of concrete structures using adaptive neuro-fuzzy inference system (ANFIS). The ANFIS process for variable selection was applied for this purpose. This procedure comprises some methods that determine a subsection of the entire set of detailed factors, which present analytical capability. ANFIS was applied to complete a flexible search. Afterward, this method was applied to conclude how the five main factors (namely, age, silica fume, fine aggregate, coarse aggregate, and water) used in designing concrete mixture influence the Schmidt rebound hammer reading and consequently the structural health monitoring accuracy. Results show that water is considered the most significant parameter of the Schmidt rebound hammer reading. The details of this study are discussed thoroughly.

A review on pavement porous concrete using recycled waste materials

Ali Toghroli,Mahdi Shariati,Fathollah Sajedi,Zainah Ibrahim,Suhana Koting,Edy Tonnizam Mohamad,Majid Khorami 국제구조공학회 2018 Smart Structures and Systems, An International Jou Vol.22 No.4

Pavements porous concrete is a noble structure design in the urban management development generally enabling water to be permeated within its structure. It has also capable in the same time to cater dynamic loading. During the technology development, the quality and quantity of waste materials have led to a waste disposal crisis. Using recycled materials (secondary) instead of virgin ones (primary) have reduced landfill pressure and extraction demanding. This study has reviewed the waste materials (Recycled crushed glass (RCG), Steel slag, Steel fiber, Tires, Plastics, Recycled asphalt) used in the pavement porous concretes and report their respective mechanical, durability and permeability functions. Waste material usage in the partial cement replacement will cause the concrete production cost to be reduced; also, the concretes’ mechanical features have slightly affected to eliminate the disposal waste materials defects and to use cement in Portland cement (PC) production. While the cement has been replaced by different industrial wastes, the compressive strength, flexural strength, split tensile strength and different PC permeability mixes have depended on the waste materials’ type applied in PC production.

Prediction of shear capacity of channel shear connectors using the ANFIS model

Ali Toghroli,Mohammad Mohammadhassani,Meldi Suhatril,Mahdi shariati,Zainah Ibrahim 국제구조공학회 2014 Steel and Composite Structures, An International J Vol.17 No.5

Due to recent advancements in the area of Artificial Intelligence (AI) and computational intelligence, the application of these technologies in the construction industry and structural analysis has been made feasible. With the use of the Adaptive-Network-based Fuzzy Inference System (ANFIS) as a modelling tool, this study aims at predicting the shear strength of channel shear connectors in steel concrete composite beam. A total of 1200 experimental data was collected, with the input data being achieved based on the results of the push-out test and the output data being the corresponding shear strength which were recorded at all loading stages. The results derived from the use of ANFIS and the classical linear regressions (LR) were then compared. The outcome shows that the use of ANFIS produces highly accurate, precise and satisfactory results as opposed to the LR.

Analysis of extended end plate connection equipped with SMA bolts using component method

Ali Toghroli,Mohammad Sadegh Nasirianfar,Ali Shariati,Majid Khorami,Masoud Paknahad,Masoud Ahmadi,Behnam Gharehaghaj,Yousef Zandi 국제구조공학회 2020 Steel and Composite Structures, An International J Vol.36 No.2

Shape Memory Alloys (SMAs) are new materials used in various fields of science and engineering, one of which is civil engineering. Owing to their distinguished capabilities such as super elasticity, energy dissipation, and tolerating cyclic deformations, these materials have been of interest to engineers. On the other hand, the connections of a steel structure are of paramount importance because of their vulnerabilities during an earthquake. Therefore, it is indispensable to find approaches to augment the efficiency and safety of the connection. This research investigates the behavior of steel connections with extended end plates equipped hybridly with 8 rows of high strength bolts as well as Nitinol superelastic SMA bolts. The connections are studied using component method in dual form. In this method, the components affecting the connections behavior, such as beam flange, beam web, column web, extended end plate, and bolts are considered as parallel and series springs according to the Euro-Code3. Then, the nonlinear force- displacement response of the connection is presented in the form of moment-rotation curve. The results obtained from this survey demonstrate that the connection has ductility, in addition to its high strength, due to high ductility of SMA bolts.

Effect of mixing Nano-silica and Perlite with pervious concrete for nitrate removal from the contaminated water

Hosseini, Seyed Azim,Toghroli, Ali Techno-Press 2021 Advances in concrete construction Vol.11 No.6

Nitrogen and phosphorus contained in storm water runoff contaminate both surface and ground waters, causing problems for natural aquatic systems and human health. Pervious concrete particularly developed for pollutant removal might be a novel notion to remove nitrate from runoff. In this research, three aggregates were used in pervious concrete as Nano silica, perlite (Pe) and zeolite (Z) which are able to adsorb pollutants. The water absorption, compressive strength, porosity, permeability of aggregate and nitrate removal of concrete samples were evaluated in tests. While adding Nano silica, perlite and zeolite, experiments have shown that addition of fine grains enhances runoff efficiency and compressive strength, but reduces permeability and porosity. Both adsorbents improved the runoff quality while increasing the additives' ratio. The mechanical properties were density of 879 (Kg/m³), permeability of 1.06 (cm/s), the void rate of 19.7(%), compressive strength of 3.6 (MPa), and nitrate removal of about 75%. While adding perlite with the highest (40%) water absorption, the results showed no reactivity of aggregates in terms of alkali-silica reaction. Considering the Permeability tests, perlite has the minimum (1.4 cm/s) permeability, and then adding perlite to previous concrete brought the nitrate absorption capacity about 70 ml/g (60%). The best results belonged to samples containing zeolite treatments (with 15% adsorbent and 0, 10, 20% fine-grains) with a maximum pollution decline and improved Chemical Oxygen Demand (COD) (87.1, 82.6 and 89.3%), Biochemical oxygen demand (BOD) (88.1, 87.3 and 90.7%) and Total suspended solids (TSS) (75.8, 79.1 and 84.6%). Thus, zeolite has shown effective mechanical characteristics and runoff quality, while perlite and Nano silica has shown a poor and moderate performance among the adsorbents in all tests, respectively.

Application of polymer, silica-fume and crushed rubber in the production of Pervious concrete

Diyuan Li,Ali Toghroli,Mahdi Shariati,Fathollah Sajedi,Dieu Tien Bui,Peiman Kianmehr,Edy Tonnizam Mohamad,Majid Khorami 국제구조공학회 2019 Smart Structures and Systems, An International Jou Vol.23 No.2

chieving a pervious concrete (PC) with appropriate physical and mechanical properties used in pavement have been strongly investigated through the use of different materials specifically from the global waste materials of the populated areas. Discarded tires and the rubber tire particles have been currently manufactured as the recycled waste materials. In the current study, the combination of polymer, silica fume and rubber aggregates from rubber tire particles have been used to obtain an optimized PC resulting that the PC with silica fume, polymer and rubber aggregate replacement to mineral aggregate has greater compressive and flexural strength. The related flexural and compressive strength of the produced PC has been increased 31% and 18% compared to the mineral PC concrete, also, the impact resistance has been progressed 8% compared to the mineral aggregate PC and the permeability with Open Graded Fraction Course standard (OGFC). While the manufactured PC has significantly reduced the elasticity modulus of usual pervious concrete, the impact resistance has been remarkably improved.

Investigation of microstructure and surface effects on vibrational characteristics of nanobeams based on nonlocal couple stress theory

Shariati, Ali,Barati, Mohammad Reza,Ebrahimi, Farzad,Toghroli, Ali Techno-Press 2020 Advances in nano research Vol.8 No.3

The article brings the study of nonlocal, surface and the couple stress together to apparent the frequency retaliation of FG nanobeams (Functionally graded). For the examination of frequency retaliation, the article considers the accurate spot of neutral axis. This article aims to enhance the coherence of proposed model to accurately encapsulate the significant effects of the nonlocal stress field, size effects together with material length scale parameters. These considered parameters are assimilated through what are referred to as modified couple stress as well as nonlocal elasticity theories, which encompasses the stiffness-hardening and softening influence on the nanobeams frequency characteristics. Power-law distribution is followed by the functional gradation of the material across the beam width in the considered structure of the article. Following the well-known Hamilton's principle, fundamental basic equations alongside their correlated boundary conditions are solved analytically. Validation of the study is also done with published result. Distinct parameters (such as surface energy, slenderness ratio, as nonlocal material length scale and power-law exponent) influence is depicted graphically following the boundary conditions on non-dimensional FG nanobeams frequency.

Numerical study on the axial compressive behavior of built-up CFT columns considering different welding lines

Mahdi Shariati,Morteza Naghipour,Ghazaleh Yousofizinsaz,Ali Toghroli,Nima Pahlavannejad Tabarestani 국제구조공학회 2020 Steel and Composite Structures, An International J Vol.34 No.3

A concrete filled steel tube (CFT) column with stiffeners has preferable behavior subjected to axial loading condition due to delay local buckling of the steel wall than traditional CFT columns without stiffeners. Welding lines in welded built-up steel box columns is expected to behave as longitudinal stiffeners. This study has presented a numerical investigation into the behavior of built-up concrete filled steel tube columns under axial pressure. At first stage, a finite element model (FE) has been built to simulate the behavior of built-up CFT columns. Comparing the results of FE and test has shown that numerical model passes the desired conditions and could accurately predict the axial performance of CFT column. Also, by the raise of steel tube thickness, the load bearing capacity of columns has been increased due to higher confinement effect. Also, the raise of concrete strength with greater cross section is led to a higher load bearing capacity compared to the steel tube thickness increment. In CFT columns with greater cross section, concrete strength has a higher influence on load bearing capacity which is noticeable in columns with more welding lines.

Behavior of steel storage pallet racking connection - A review

Chulin Chen,Lei Shi,Mahdi Shariati,Ali Toghroli,Edy Tonnizam Mohamad,Dieu Tien Bui,Majid Khorami 국제구조공학회 2019 Steel and Composite Structures, An International J Vol.30 No.5

Steel pallet racking industry has globally used from the industrial revolution and has deeply evolved from hot-rolled profile into cold-formed profile to raise the optimization in engineering field. Nowadays, some studies regarding cold-formed steel profile have been performed, but fewer studies in terms of cold-formed pallet racking specifically in connection due to the semi-rigid behavior by lug-hooked into the upright have been conducted. The objective of this study is to review the related literature on steel storage racking connection behavior.