An Applicaiton of TBEC-2018 in the Prediction of Retaining Wall Dimensions with Simple Regression Analysis

Global Virtual Conference in Civil Engineering (GVCCE) 2020

9 Pages Posted: 24 Nov 2020 Last revised: 5 Jan 2021

Z. Akbay Arama

Istanbul University-Cerrahpaşa

İlknur Dalyan

Turkish Ministry of Interior Disaster and Emergency Management Precidency

M. Selahaddin Akın

Kartal Municipality

Hazal Berrak Gençdal

Istanbul Kultur University

Date Written: November 12, 2020

Abstract

Retaining walls are common engineering structures that are built to resist the lateral earth pressures generally caused by the excavations. It has always been a suspicious subject for engineers to design the retaining walls under dynamic loads. In this context, In Turkey, the Turkish Building Earthquake Code 2018 (TBEC-2018) is developed to perform more sensitive analyses to increase the welfare and security of society, depending on structural safety. TBEC-2018 has also mentioned the design of the reinforced concrete retaining walls (RCRW) under seismic loads at the 16th section. The design of the RCRW walls is performed in this study, according to TBEC. It is considering the change of the excavation depth, the shear strength angle of the soil and the unit weight of the soil, the surcharge load. The change of the dimensions has been investigated and conducted simple regression analyses to obtain design expressions based on the change of mentioned variants.

Keywords: Turkish Earthquake Building Code, Reinforced Concrete Retaining Walls, Earthquake Resistant Design

Suggested Citation:

Akbay Arama, Zulal and Dalyan, İlknur and Akın, M. Selahaddin and Gençdal, Hazal Berrak, An Application of TBEC-2018 in the Prediction of Retaining Wall Dimensions with Simple Regression Analysis (November 12, 2020). Global Journal in Civil Engineering, Vol. 2, No. 2, 2020, Global Virtual Conference in Civil Engineering (GVCCE) 2020, Available at SSRN: https://ssrn.com/abstract=3734163

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Available at SSRN: https://ssrn.com/abstract=3734163

The Usage of Different Drying Temperatures to Determine the Organic Matter in Soils

Global Virtual Conference in Civil Engineering (GVCCE) 2020

11 Pages Posted: 24 Nov 2020

Z. Akbay Arama

Istanbul University-Cerrahpaşa

Hazal Berrak Gençdal

Istanbul Kultur University

Date Written: November 12, 2020

Abstract

The organic soils are considered to be problematic soil based on the viewpoint of geotechnical engineering discipline depending on their tendency to high compressibility. Depending on the low shear strength characteristics of organic soils, the projects that are constructed on the soil formations which include organic content greater than %20, have to be controlled in terms of long term behaviour to ensure sustainable usage. Therefore, it is a significant phenomenon to determine the organic content of the soil mass that is dominated in the construction field of the envisaged project. Within the context of the study, the instructions which are defined in “ASTM D2974-Standard Test Methods for Moisture, Ash, and Organic Matter of Peat and Other Organic Soils” is applied to the special soils which are obtained from 21 different test pits opened in Istanbul Province, Arnavutkoy district, Tayakadin localization. It is aimed to search for the effects of the usage of different drying temperatures on the determined amount of organic matter contents of soil masses. Within this purpose, the C and D subdivisions of ASTM D2974, which are suggested to apply 440 and 750°C drying temperatures, respectively, are applied to identify the organic matter content of foreseen soil types. Consequently, interpretations are made to specialize the appropriateness of the application of high drying temperatures on soils and the effective rates of drying temperatures on the determination of organic content of soils. 

Keywords: Water Content Determination, Organic Matter Content, Soil, Drying Temperature, Physical test

Suggested Citation:

Akbay Arama, Zulal and Gençdal, Hazal Berrak, The Usage of Different Drying Temperatures to Determine the Organic Matter in Soils (November 12, 2020). Global Journal in Civil Engineering, Vol. 2, No. 2, 2020, Available at SSRN: https://ssrn.com/abstract=3734200

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Available at SSRN: https://ssrn.com/abstract=3734200

Effect of Pulverized Glass Powder on Compressive Strength of Revibrated Concrete

Global Virtual Conference in Civil Engineering (GVCCE) 2020

11 Pages Posted: 18 Feb 2021 Last revised: 7 Jul 2021

Samuel Auta

Department of Civil Engineering, School of Infrastructures, Process Engineering and Technology, Federal University of Technology (FUTMinna)

Abdulrahman Abdullahi

Department of Civil Engineering, School of Infrastructures, Process Engineering and Technology, Federal University of Technology (FUTMinna)

Date Written: November 13, 2020

Abstract

Experimental study on the Effect of pulverized glass powder (PGP) on the compressive strength of revibrated concrete is presented. A concrete mix of 1:2:4 was used to prepare a total of forty-eight fresh concrete cubes specimen: sixteen for control with 0% PGP; thirty-two cubes for the different percentages of OPC replacements (10%, 20%, 30%, and 40% PGP). Each set of fresh concrete cubes were subjected to initial vibration and then re-vibrated at an interval of 10 minutes successions up to 1 hour. The compressive strength was determined at 7 and 28-day curing age for each concrete cube. The results show that maximum compressive strength were best achieved in three categories: 21.39 N/mm2 for nonrevibrated; 23.64 N/mm2 and 18.34N/mm2 for 0% and 20% PGP revibrated concrete respectively. It is concluded that pulverized glass can be blended with cement up to 20% PGP to achieve a substantial compressive strength of revibrated concrete. 

Keywords: Pulverised glass powder, revibrated concrete, compressive strength, cement, percentage replacements

Suggested Citation:

Auta, Samuel and Abdullahi, Abdulrahman, Effect of Pulverized Glass Powder on the Compressive Strength of Revibrated Concrete (November 13, 2020). Global Journal in Civil Engineering, Vol. 2, No. 2, 2020, Available at SSRN: https://ssrn.com/abstract=3759494

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Available at SSRN: https://ssrn.com/abstract=3759494

Properties of Plain Cement Concrete by Incorporating Multi-Walled Carbon Nanotubes (MWCNTs) and Marble Powder

Global Virtual Conference in Civil Engineering (GVCCE) 2020

8 Pages Posted: 24 Nov 2020 Last revised: 5 Jan 2021

Abdul Jalil Khan

affiliation not provided to SSRN

Liaqat Ali Qureshi

University of Engineering & Technology (Taxila)

Muhammad Nasir Ayaz Khan

affiliation not provided to SSRN

Yasir Rasheed

affiliation not provided to SSRN

Luqman Ali

National University of Science & Technology

Sardar Faisal Abbas

HITEC University Taxila Cantt

Date Written: November 11, 2020

Abstract

This research aims to enhance the properties of concrete by incorporating innovative material and locally available cementitious waste materials. In this study, innovative material Multi-Walled Carbon Nanotubes (MWCNTs) @ 0.025% as well 5% marble powder by weight of cement has been incorporated in concrete to study its fresh properties, compressive strength and microstructural properties. A total of 42 specimens for 7 numbers of different proportions were cast. The water-cement ratio of 0.45 was kept constant throughout the research. Compressive strength was noted at 7 days and 28 days curing through the compression testing machine. It was observed that the highest strength was noted for mix having 0.20% of MWCNTs and lowest was noted for control specimen having no MWCNTs and marble powder. The flow of concrete tends to increase by incorporating MWCNTs. The Scanning Electron Microscope (SEM) analysis confirms the formation of C-S-H gel in mixes having MWCNTs. The formation of bridge layers was also visible in mixes having MWCNTs and marble powder. This study recommends using 0.20% of MWCNTs and 5% marble powder to achieve superior properties of concrete.

Keywords: Concrete, multiwalled carbon nanotubes (MWCNTs), Cement, scanning electron microscope (SEM), Compressive strength

Suggested Citation:

Khan, Abdul Jalil and Qureshi, Liaqat Ali and Ayaz Khan, Muhammad Nasir and Rasheed, Yasir and Ali, Luqman and Abbas, Sardar Faisal, Properties of Plain Cement Concrete by Incorporating Multi-Walled Carbon Nanotubes (MWCNTs) and Marble Powder (November 11, 2020). Global Journal in Civil Engineering, Vol. 2, No. 2, 2020, Global Virtual Conference in Civil Engineering (GVCCE) 2020, Available at SSRN: https://ssrn.com/abstract=3734250

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Available at SSRN: https://ssrn.com/abstract=3734250