Article
Construction & Building Technology
Ahmed M. Tahwia, Ashraf M. Heniegal, Mohamed Abdellatief, Bassam A. Tayeh, Mohamed Abd Elrahman
Summary: This paper investigates the effects of waste glass on ultra-high performance geopolymer concrete (UHPGC). The study finds that the addition of waste glass improves the flowability but reduces the compressive strength of the concrete. Waste glass also contributes to the durability and thermal stability of the concrete after high temperature exposure.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Green & Sustainable Science & Technology
Sarah A. Khattab, Mohamed M. Yousry Elshikh, Walid E. Elemam, Ahmed A. Elshami, Osama Youssf
Summary: This study investigates the effect of using magnetized water as an alkaline activator on the mechanical properties and durability of geopolymer concrete. The results show that under specific conditions, using magnetized water can significantly improve the slump and compressive strength of geopolymer concrete, as well as enhance its surface morphology.
Article
Polymer Science
Leong Sing Wong
Summary: Geopolymer concrete, produced through an eco-friendly process, has shown high durability and resistance to chemical aggressions, making it a viable alternative to Ordinary Portland Cement (OPC) concrete in construction.
Article
Polymer Science
Mohamed Abdellatief, Hani Alanazi, Mohammed K. H. Radwan, Ahmed M. Tahwia
Summary: The main obstacle of using geopolymer as a construction repair material is its slow strength development rate. This study investigates the feasibility of developing an ultra-high performance geopolymer concrete (UHPGC) with high early-age strength. Experimental results reveal the optimal mix design and curing conditions for UHPGC, which exhibit superior early strength and microstructural characteristics. The findings emphasize the feasibility of using UHPGC as an eco-friendly quick repair material for improving the structural capacity and durability.
Review
Construction & Building Technology
Choi Lin Chan, Mingzhong Zhang
Summary: Alkali-activated concrete (AAC) is a sustainable alternative to cementitious materials, and its engineering properties can be influenced by the presence of limestone. This review examines the effects of limestone on AAC synthesized from various precursors, and discusses the underlying mechanisms and environmental impact. The findings provide insights for future research and development in this field.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Engineering, Civil
B. Swathi, R. Vidjeapriya
Summary: As urbanization continues to grow globally, the adverse effects on the environment also increase significantly. This has led to the evolution of construction materials, such as geopolymer concrete, to meet the requirements of eco-friendly construction without compromising performance. This study focuses on producing high-strength geopolymer concrete using ground granulated blast furnace slag, metakaolin, and nano-silica, and evaluates the influence of nano-silica on various properties and microstructure of the concrete.
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
(2023)
Article
Construction & Building Technology
Xinyan Wu, Yanghai Shen, Liang Hu
Summary: This study examined the properties of geopolymer concrete activated by sodium silicate and silica fume activator. It found that silica fume can improve the workability and strength of the concrete, and has less influence on the slump. Compared with sodium silicate activator, geopolymer concrete activated by silica fume has less cracks and porosities on the surface, and shows good early strength.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Review
Construction & Building Technology
Hemn Unis A. Ahmed, Azad S. Mohammed, Ahmed Mohammed
Summary: Geopolymers are innovative cementitious materials that can potentially replace traditional Portland cement. The addition of nanoparticles enhances the properties of geopolymer composites, improving strength, durability, and microstructure.
JOURNAL OF BUILDING ENGINEERING
(2022)
Review
Construction & Building Technology
Furqan Farooq, Jin Xin, Muhammad Faisal Javed, Arslan Akbar, Muhammad Izhar Shah, Fahid Aslam, Rayed Alyousef
Summary: The rise in population and improvement in lifestyle have led to a rapid increase in energy demand for buildings, prompting the development of sustainable infrastructure due to the lack of fossil fuels and environmental issues. Geopolymer composites are becoming popular for their sustainability and reduced greenhouse gas emissions compared to ordinary Portland cement.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Hadi Bahmani, Davood Mostofinejad
Summary: A high-performance concrete based on calcium oxide-activated materials (HPC-CAM) was developed and studied. The addition of calcium chloride and calcium nitrate improved the microstructure of the concrete, while different fibers were used to enhance flexibility. Tests showed that calcium chloride increased compressive strength by 69% and flexural strength by 20% compared to calcium nitrate. Recycled PET and modified synthetic macro fibers significantly increased flexural toughness compared to steel fibers.
DEVELOPMENTS IN THE BUILT ENVIRONMENT
(2023)
Review
Construction & Building Technology
Hadi Bahmani, Davood Mostofinejad
Summary: This article comprehensively examines the mechanical properties, durability, and microstructure of ultra-high-performance geopolymer concrete (UHPGC) in comparison with ultra-high-performance concrete (UHPC), as well as scrutinizes the mechanical properties and microstructure of UHPGC exposed to high temperatures. Different tests and measurements were conducted to evaluate these aspects, and the results showed that UHPGC can meet the ideal specifications of UHPC in terms of its mechanical properties. Furthermore, the optimal percentage of silica fume as a slag substitute and the best combination of activators for UHPGC at temperatures above 600 degrees C were identified.
DEVELOPMENTS IN THE BUILT ENVIRONMENT
(2023)
Article
Construction & Building Technology
Osama Youssf, Mohamed Elchalakani, Reza Hassanli, Rajeev Roychand, Yan Zhuge, Rebecca J. Gravina, Julie E. Mills
Summary: This study investigated lightweight geopolymer Rubcrete as a viable alternative to lightweight conventional concrete, showing comparable or improved durability properties. The use of rubber and LECA increased workability but decreased compressive strength. Additionally, variations were observed in the effectiveness of heat + water curing among different mix designs.
JOURNAL OF BUILDING ENGINEERING
(2022)
Review
Materials Science, Ceramics
Qiang Fu, Wenrui Xu, Xu Zhao, MengXin Bu, Qiang Yuan, Ditao Niu
Summary: The study summarizes the microstructure and durability of fly ash-based geopolymer concrete (FABGC), finding that the aluminosilicate gel produced during the alkali activation process optimizes the pore structure and interface characteristics, enhancing the material's durability. However, there is still no consensus on the research conclusions regarding the microstructure and durability of FABGC, necessitating further research.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Hadi Bahmani, Davood Mostofinejad
Summary: This study introduces new mixing ingredients and techniques for high-performance concrete based on activated slag, and explores the use of alkaline earth activators for the first time. It also evaluates the use of limestone powder as a fine ingredient in high-performance concrete. The experimental results show that the use of 10% calcium oxide as an activator can provide the desired characteristics for compressive and flexural strength, as well as dynamic and static moduli of elasticity.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Construction & Building Technology
K. K. Yaswanth, J. Revathy, P. Gajalakshmi
Summary: This research focuses on the development of eco-friendly AA-EGC by utilizing high-volume industrial slag wastes and agro waste. Experimental tests were conducted to evaluate the strength and durability performances of the composite. The results showed that the volume of copper slag as fine aggregate could be limited to 60% to avoid segregation and bleeding issues.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Green & Sustainable Science & Technology
Moumita Maiti, Manas Sarkar, Shilang Xu, Sukhen Das, Dibyendu Adak, Soumen Maiti
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
(2019)
Article
Construction & Building Technology
S. Jeeva Chithambaram, Sanjay Kumar, Madan M. Prasad, Dibyendu Adak
STRUCTURAL CONCRETE
(2018)
Article
Engineering, Civil
Sandeep Das, Subhrajit Dutta, Chandrasekhar Putcha, Shubhankar Majumdar, Dibyendu Adak
ASCE-ASME JOURNAL OF RISK AND UNCERTAINTY IN ENGINEERING SYSTEMS PART A-CIVIL ENGINEERING
(2020)
Article
Engineering, Civil
Gosala Sai Ram Reddy, Madhusudhan Bolla, M. Longshithung Patton, Dibyendu Adak
Summary: The study focused on comparing the structural behaviors of CFST and RCC stub columns of different concrete grades through experimental and numerical analysis, showing that the axial capacity of CFST columns is on average 50% to 55% higher than that of RCC columns. Various parameters like D/t ratios, steel percentage, and concrete cube strengths were investigated for both CFST and RCC columns.
Article
Engineering, Civil
Sandeep Das, Subhrajit Dutta, Dibyendu Adak, Shubhankar Majumdar
Summary: This study focused on the experimental and numerical investigation of flexural crack behavior in reinforced concrete beam members, with a specific emphasis on the impact of varying tensile steel percentage on crack formation. By developing a data-driven numerical tool based on computer vision, structural designers and practitioners can utilize it for robust serviceability-based design of reinforced concrete members and systems.
Article
Construction & Building Technology
Dodda Srinivas, Kruthi Kiran Ramagiri, Arkamitra Kar, Dibyendu Adak, Ehsan Noroozinejad Farsangi, Subhrajit Dutta
Summary: The study investigates the strength, durability, and corrosion resistance of quaternary blended mortar made with PPC, GGBS, and RHA in a marine environment. The optimized quaternary blended mortar exhibits improved mechanical strengths and enhanced resistance to chloride penetration, corrosion, and water absorption compared to the control mix after exposure to marine environment. Mineralogical and chemical analyses are conducted to determine the effects of marine environment exposure on the different mixes.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Engineering, Multidisciplinary
Dibyendu Adak, Donkupar Francis Marbaniang, Subhrajit Dutta
Summary: This study investigates the development of self-healing cementitious matrix using waste straw pipes encapsulated with sodium hydroxide, sodium silicate, and colloidal nano-silica. Mechanical strength and durability tests show that mortar mix with 10% slag content has the best self-healing potential, attributed to hydration of anhydrous slag and transformation to crystalline phase in the presence of encapsulated fluid.
INTERNATIONAL JOURNAL OF STRUCTURAL INTEGRITY
(2021)
Article
Engineering, Civil
M. Longshithung Patton, Syed Bustan Fatima Warsi, Dibyendu Adak
Summary: This study compares the performance of hollow steel tubes (HST), concrete-filled steel tubes (CFST), and reinforced cement concrete (RCC) stub columns. The results show that filling CFST enhances its strength, while HST has approximately half the strength of RCC. CFST has a 1.3 times higher strength than RCC for slender sections and a 2.8 times higher strength for stocky sections. This study has significant implications for the field of concrete structures.
INNOVATIVE INFRASTRUCTURE SOLUTIONS
(2023)
Article
Engineering, Civil
Dibyendu Adak, Abhishek Chand, M. Longshithung Patton, Subhrajit Dutta, Himanshu Bisht
Summary: This study focuses on the structural behavior of concrete-filled steel tubular (CFST) stub columns with different levels of nano-silica blended concrete core infill. The results show that adding nano-silica significantly increases the strength and deformation capacities of the CFST columns. The increase in strength is about 1.6 and 1.5 times for square and circular sections, respectively, when the optimum replacement of cement with nano-silica is used.
PRACTICE PERIODICAL ON STRUCTURAL DESIGN AND CONSTRUCTION
(2023)
Article
Construction & Building Technology
D. F. Marbaniang, A. Kar, D. Adak, K. K. Ramagiri, D. Srinivas, I. Ray
Summary: This study investigates the development of ambient-cured alkali-activated binders (AABs) by adding graphene oxide (GO) nanoparticles. The optimal mechanical and durability characteristics are observed in the AAB specimens containing 0.06% GO and 4M sodium hydroxide activator. The addition of GO accelerates the rate of hydration and promotes the formation of a greater number of nucleation sites.
ACI MATERIALS JOURNAL
(2023)
Article
Engineering, Civil
Kruthi Kiran Ramagiri, Darshan Rajesh Chauhan, Shashank Gupta, Arkamitra Kar, Dibyendu Adak, Abhijit Mukherjee
Summary: This study investigates the high-temperature performance of alkali-activated binders (AAB) concrete with different ratios of fly ash and slag, finding that the 70:30 ratio exhibits the best mechanical performance after exposure to elevated temperatures. Moreover, the study reveals that there is an optimum proportion of slag content beyond which the mechanical performance of AAB concrete significantly deteriorates when exposed to high temperatures.
INNOVATIVE INFRASTRUCTURE SOLUTIONS
(2021)
Proceedings Paper
Construction & Building Technology
Kruthi Kiran Ramagiri, Darshan Chauhan, Shashank Gupta, Arkamitra Kar, Dibyendu Adak
PROCEEDINGS OF STRUCTURAL ENGINEERING AND CONSTRUCTION MANAGEMENT, SECON'19
(2020)
Correction
Construction & Building Technology
Dibyendu Adak, Manas Sarkar, Saroj Mandal
CONSTRUCTION AND BUILDING MATERIALS
(2017)
Article
Construction & Building Technology
Dibyendu Adak, Manas Sarkar, Saroj Mandal
CONSTRUCTION AND BUILDING MATERIALS
(2017)
