Article
Engineering, Multidisciplinary
Ola A. Mayhoub, El-Sayed A. R. Nasr, Yehia Ali, Mohamed Kohail
Summary: RPC is a high strength concrete that requires the use of environmentally friendly materials to replace cement, with geopolymer concrete being a viable alternative. It was found in the study that thermal curing has a positive impact on the performance of RPC mixes.
AIN SHAMS ENGINEERING JOURNAL
(2021)
Article
Construction & Building Technology
Yunshi Pan, Yaowen Zhang, Shuangxin Li
Summary: The study explores the combined application of microwaving curing and RPC, finding that isothermal microwave curing can effectively improve the mechanical properties of concrete and is more energy efficient and easier to control compared to nonisothermal curing.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Mohammad Zaheer Rahimi, Rongguo Zhao, Shafiullah Sadozai, Feng Zhu, Nan Ji, Lingpeng Xu
Summary: Modernizations in the chemical and construction industries have allowed for the development of innovative curing techniques. Numerous studies have been conducted to evaluate the effectiveness of curing and its impact on concrete properties. This paper examines the use of a compound curing agent (CCA) and water-based curing (WBC) on concrete specimens made with Ordinary Portland Cement. The results indicate that water-cured specimens have slightly higher compressive strength than those cured with a compound, but the reliability of the compound-cured specimens' compressive strength data is better than that of the water-cured ones.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Chemistry, Physical
Sergey A. Stel'makh, Alexey N. Beskopylny, Evgenii M. Shcherban, Levon R. Mailyan, Besarion Meskhi, Alexandr A. Shilov, Diana El'shaeva, Andrei Chernil'nik, Svetlana Kurilova
Summary: The aim of this study was to substantiate the feasibility of replacing non-renewable components of concrete with renewable plant counterparts, such as coconut shells. The research found that utilizing crushed coconut shells as aggregate in concrete can improve its strength and quality indicators.
Article
Construction & Building Technology
Mei-Yu Xuan, Run-Sheng Lin, Tae-Beom Min, Xiao-Yong Wang
Summary: A large amount of eggshell waste is produced annually worldwide, and proper disposal is crucial for environmental pollution reduction and sustainable development. In this study, eggshell powder was added to cement, and its properties were evaluated under sealed and carbonation-curing conditions. The addition of eggshell powder had a dilution effect under sealed-curing conditions, causing a decrease in several properties. However, under carbonation-curing conditions, the addition of eggshell powder improved carbon capture capacity, increased compressive strength, and reduced strength loss.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Chemistry, Physical
Efe Ewaen Ikponmwosa, Samuel Ehikhuenmen, Joseph Emeshie, Adeyemi Adesina
Summary: This study investigates the performance of concrete made with coconut shell ash as partial replacement of Portland cement through experimental and statistical methods. Experimental results show an increase in compressive strength and split tensile strength with an increase in sodium hydroxide concentration. Statistical models developed demonstrate good agreement with the experimental results.
Review
Polymer Science
Fatheali A. Shilar, Sharanabasava V. Ganachari, Veerabhadragouda B. Patil, T. M. Yunus Khan, Naif Mana Almakayeel, Saleh Alghamdi
Summary: This paper investigates the impact of important nanomaterials on the performance of geopolymer concrete. The study reveals that increasing the alkaline to binder and sodium silicate to sodium hydroxide ratios can enhance the strength development of geopolymer concrete. The addition of small quantities of nanomaterials further improves the strength and structural stability of the concrete, enhancing its durability.
Review
Construction & Building Technology
Senthil Kumar Kaliyavaradhan, P. S. Ambily, Prabhat Ranjan Prem, Swapnil Balasaheb Ghodke
Summary: This paper provides a comprehensive review of the test methods used to characterize the fresh and hardened properties of 3DPC and discusses the factors influencing test techniques and future research directions for standardizing the test methods. The extensive information provided in this review will assist the engineering community and 3DPC manufacturers in selecting suitable methods or standards to test 3DPC.
AUTOMATION IN CONSTRUCTION
(2022)
Article
Construction & Building Technology
Yousef R. Alharbi, Aref A. Abadel, Abdulrahman A. Salah, Ola A. Mayhoub, Mohamed Kohail
Summary: The study aimed to evaluate the performance of RPC developed by AAM under different curing conditions, with findings showing that microwave curing has a good impact on AAM mixes with total cement replacement, while steam curing enhances the behaviour of RPC based cement. Additionally, when MK was used in RPC based AAM, a 30% loss in strength was observed compared to slag, and microwave curing led to a reduction in capillary pores. Moreover, the addition of extra water to improve workability weakened the geopolymerization process and increased microstructure porosity.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Xin Lyu, Neil Robinson, Mohamed Elchalakani, Michael L. Johns, Minhao Dong, Shidong Nie
Summary: This study investigates the mechanical properties of geopolymer mixes with varying designs, as well as the influence of unwashed sea sand, seawater, binders, activators, and curing conditions. The results show that geopolymer mixes activated by sodium hydroxide can achieve high compressive strength when cured in seawater.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Construction & Building Technology
Rahnum T. Nazmul, Estela O. Garcez, Safat Al-Deen, Mahmud Ashraf, Bre-Anne Sainsbury
Summary: The effectiveness of hemp shives for internal curing of concrete was experimentally investigated in this study. It was found that the compressive strength of the hemp-concrete composite increased with the reduction of particle size and dosage of hemp shives. The mix that included 1% shives in the size range 1 to 2 mm achieved the highest strength. Microstructural analysis confirmed that continued hydration took place due to the presence of internal water supplied by the hemp shives.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Mohammad J. Uddin, Kelly J. Smith, Craig W. Hargis
Summary: This study developed a more durable and sustainable cementitious composite substrate for oyster reef restoration using recycled oyster shells and low cement content. By increasing the water, sand, cement, and high-range water reducing admixture content, the physical properties of the concrete were improved, enhancing both compressive and flexural strength. The proposed material for reef restoration is superior in terms of cost, durability, environmental benefits, and carbon footprint.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Alireza Javadi Pordesari, Payam Shafigh, Zainah Ibrahim, Muhammad Aslam
Summary: The large-scale consumption of natural resources due to industrialization and urbanization suggests the need for using industrial and agricultural wastes as aggregate in concrete to promote sustainability. While using agricultural wastes affects the performance of concrete, coconut shell concrete showed better performance compared to oil palm shell lightweight concrete.
ADVANCES IN CONCRETE CONSTRUCTION
(2021)
Review
Construction & Building Technology
Balamurali Kanagaraj, Eva Lubloy, N. Anand, Viktor Hlavicka, Tattukolla Kiran
Summary: Geo-polymer concrete (GPC) is produced through chemical reactions between industrial products and naturally occurring alumino silicate sources. However, there is a lack of standardized guidelines for mix production, limiting the acceptance of geo-polymer in the industry. Unlike cement concrete, GPC's properties are influenced by various factors such as the ratio of alkaline liquid to cementitious material, alkaline activator ratio, binder type, and curing type. This paper provides an overview of the chemistry behind GPC, alumino-silicate sources, and the microstructural analysis of binders under different curing conditions.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Bin Yao, Guosheng Ren, Jiangbo Huang, Xiaojian Gao
Summary: This study investigated the influence of coal gangue on foam concrete with steam curing, showing that the addition of coal gangue can improve compressive strength, decrease drying shrinkage, adjust air void structure, accelerate the hydration of cement and pozzolanic reaction of coal gangue. Therefore, the utilization of coal gangue in foam concrete is beneficial for environmental protection and construction.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Engineering, Civil
K. Gunasekaran, T. S. Lakshmi, K. S. Satyanarayanan
EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING
(2019)
Article
Engineering, Civil
S. Prakash Chandar, K. Gunasekaran, K. S. Satyanarayanan, R. Annadurai
EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING
(2020)
Article
Engineering, Civil
K. Gunasekaran, G. Pennarasi, V. Deeptha Thattai, T. N. Brinda
Summary: Using coconut shell as coarse aggregate in producing hollow blocks can reduce shrinkage cracks in concrete, improve durability, and meet strength requirements. Mixes developed in laboratory show better performance compared to those used in field.
EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING
(2021)
Article
Construction & Building Technology
V. R. Prasath Kumar, K. Gunasekaran, T. Shyamala
JOURNAL OF BUILDING ENGINEERING
(2019)
Article
Chemistry, Physical
Lakshmi Thangasamy, Gunasekaran Kandasamy
Article
Green & Sustainable Science & Technology
R. Ramasubramani, K. Gunasekaran
Summary: This study focuses on finding sustainable replacement materials for river sand and stone aggregate, choosing manufactured sand and coconut shell as suitable alternatives. The use of manufactured sand and coconut shell as substitutes for conventional materials in concrete production not only maintains but also improves the strength of the concrete, making them sustainable choices for preserving natural resources.
Article
Construction & Building Technology
S. Nithya, K. Gunasekaran, G. Sankar
Summary: The study investigated the flexural behavior of concrete containing GGBS, M-sand, coconut shell, and crushed stone aggregate. Results showed that coconut shell has the potential to be used as a coarse aggregate in producing structural grade geopolymer lightweight coconut shell concrete.
ADVANCES IN CIVIL ENGINEERING
(2021)
Article
Engineering, Civil
K. Kalaivani, K. Gunasekaran, R. Annadurai
Summary: This study explores the use of coconut husk as a sustainable alternative to river sand in the production of mortar for ferrocement applications. The aim is to achieve a minimum compressive strength of 35 N/mm² using coconut husk as a fine aggregate. Through experimental mixes and different combinations of admixtures, the target strength was successfully achieved. Additionally, samples of ferrocement panels were produced to demonstrate the feasibility of this innovative sustainable solution in practice.
INNOVATIVE INFRASTRUCTURE SOLUTIONS
(2022)
Article
Engineering, Civil
R. Ramasubramani, K. Gunasekaran
Summary: This study aimed to investigate the plastic shrinkage characteristics of CSC produced with M-sand as a replacement for river sand. The experimental results showed that the compressive strength increased and plastic shrinkage crack area decreased as the percentage of M-sand replacement increased in both CC and CSC.
INNOVATIVE INFRASTRUCTURE SOLUTIONS
(2022)
Article
Green & Sustainable Science & Technology
Kalaivani Kumarasamy, Gunasekaran Kandasamy, Annadurai Ramasamy
Summary: The study aims to produce mortar for ferrocement using coconut husk. Four types of mortars were used in the study, and the microstructural analysis of mortar constituents and mixes was conducted. Hardened mortar tests were performed to evaluate the strength properties of the mortars. The results showed that coconut husk can be used as an alternative fine aggregate for mortar production, and its lower density makes it suitable for lightweight ferrocement applications.
Article
Construction & Building Technology
M. G. Soundarya Priya, K. S. Anandh, K. Prasanna, K. Gunasekaran, Emmanuel Itodo Daniel, Mariusz Szostak, Della Sunny
Summary: The objective of this paper is to explore the dynamic factors and develop a model of the work-family interface (WFI) of construction professionals in South India. Data were collected using questionnaires distributed among the professionals, and SPSS was used for data analysis. The study identified personal satisfaction, work-family balance, stress, and work culture as significant factors influencing the WFI. The findings provide important insights for improving the work environment and work-life balance of construction professionals in India.
Article
Engineering, Civil
T. Thilagashanthi, K. Gunasekaran, K. S. Satyanarayanan
Summary: Coconut shell aggregates have a high absorption capacity of 20-25% due to their inherent porosity. However, treating the coconut shell aggregates can reduce their porosity and improve durability performance in concrete production. This study examined the effects of six different treatments on the durability performance of concrete using treated coconut shell aggregates. The treated coconut shell concrete (TCSC) showed better durability properties compared to untreated coconut shell concrete (CSC), with TCSCT5 exhibiting the best performance. Treatments of coconut shell aggregates can significantly reduce water absorption and encourage the production of durable concrete.
INNOVATIVE INFRASTRUCTURE SOLUTIONS
(2023)
Article
Engineering, Multidisciplinary
R. Ramasubramani, K. Gunasekaran
INTERNATIONAL JOURNAL OF INTEGRATED ENGINEERING
(2020)
Article
Engineering, Multidisciplinary
Lakshmi Thangasamy, Gunasekaran Kandasamy
INTERNATIONAL JOURNAL OF INTEGRATED ENGINEERING
(2020)
Article
Engineering, Multidisciplinary
K. S. Anandh, K. Gunasekaran, M. A. Mannan
INTERNATIONAL JOURNAL OF INTEGRATED ENGINEERING
(2020)
Article
Construction & Building Technology
Qi Jiang, Wei Liu, Shaopeng Wu, Xuanwen Gou
Summary: This study analyzes the erosion mechanisms of NaCl solution on asphalt concrete and finds that NaCl solution softens asphalt and promotes the intrusion of crystalline salt into it. Salt crystallization alters the surface roughness of aggregates, resulting in a decrease in skid resistance but an improvement in compressive strength. Additionally, the concentration of NaCl solution initially has no significant impact on the mechanical performance of asphalt concrete, but its domination gradually increases with the intensification of cyclic effects.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Lili Kan, Lan-qing Dai, Ning Kong, Bin Peng, Fei Wang
Summary: This paper investigates the effect of freezing and thawing cycles on the tensile behavior of cracked ultra-high performance concrete (UHPC). The results show that long-term freezing and thawing action deteriorates the cracking strength, tensile strength, tensile strain, and strain energy of cracked UHPC. On the other hand, the action of water generally favors the development of tensile properties of UHPC. The crack distribution tends to be unsaturated under freezing and thawing environment, and the re-hydration reaction is hindered. The pore structure near the crack varies under different environments.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Xin Xiao, Jingwei Li, Qingke Meng, Xiangshan Hou, Yanhui Liu, Xujiang Wang, Wenlong Wang, Shengtao Lu, Yuzhong Li, Yanpeng Mao, Tong Li
Summary: Preparing gypsum-based self-leveling mortar (GSLM) using beta-hemihydrate gypsum and solid wastes-derived sulfoaluminate cement (WSAC) can improve the mechanical performance of the mortar, but phosphorus impurities can weaken the hydration speed and degree.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Sihang Bao, Junzhen Di, Yanrong Dong, Ziqing Gao, Qing Gu, Yuanfang Zhao, Hongyu Zhai
Summary: Tailings dam break and leakage accidents pose a threat to the safety of people in mining areas and cause severe environmental pollution. This study focuses on solidifying tailing sand using microbial induced calcite precipitation (MICP) to improve strength and fix heavy metals. The curing time of MICP bio-cemented tailings is found to significantly impact the strength of tailings, while its effect on heavy metal fixation is minimal. The optimized MICP curing time is 10 days, resulting in improved strength and cementation of tailings particles.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Ferhat Benmahiddine, Fares Bennai, Achraf Charaka, Ameur El Amine Hamami, Abdelkader Tahakourt, Rafik Belarbi
Summary: This paper studied the effects of hysteresis on the hygrothermal behavior at the building scale. Through laboratory validation and numerical simulations, it was found that hysteresis has a significant impact on the relative humidity and total heat fluxes in buildings, while it does not have a noticeable effect on temperature variations.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
You Gao, Wei He, Xiayang Zhang, De'an Sun, Pei Li
Summary: This study determined the boundary line between the swelling and compression deformation zone in lateritic clay through wetting tests, and proposed a simple bimodal SWRC model. It also found that the existing strength model underestimated the tested values in the medium to high suction range, therefore a segmented strength equation was introduced for enhanced predictions of the strength properties of lateritic clay.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Prabhath Ranjan Kumar Soda, Asheer Mogal, Kalyan Chakravarthy, Nikhil Thota, Nimish Bandaru, Sanjay Kumar Shukla, K. M. Mini
Summary: This study investigates the use of encapsulated bacteria to improve the self-healing ability of concrete. Through various tests, it is found that using 20% cement-coated alginate beads (CCAB) and 5% nanosilica (NS) can achieve optimal strength and healing. This research is significant for enhancing the durability of concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Shizhe Wang, Haiping Wu, Wen Yang, Wei Wang, Zhibo Zhu, Kun Nie, Luoxin Wang, Hua Wang, Jing Wu
Summary: In this study, photothermal-heat storage concrete (PHSC) was developed with excellent photothermal conversion performance and heat storage capacity. By absorbing and storing solar energy during the day and releasing it at night, PHSC can effectively reduce energy consumption in buildings.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Robin Deb, Jialuo He, Geetika Mishra, Yaghoob (Amir) Farnam
Summary: Incorporation techniques of phase change materials in cementitious composites have a significant influence on thermal properties. This study investigated the thermal behavior of low-temperature PCM when subjected to varying temperature change rates and pore confinement inside the porous network of lightweight aggregates. The results showed that ramp rates affect the nucleation and crystallization growth process during the phase transition, and the pore structure of the aggregates affects the supercooling phenomenon and confinement pressure of the PCM.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Eduardo Ferreira, Payam Sotoudeh, Dagmar Svecova
Summary: This study investigates the fatigue behavior of concrete under different stress reversal conditions. The results indicate that stress reversal generally causes more severe damage and reduces the cycles to failure compared to tensile fatigue. Additionally, adding some level of compression contributes to the energy required for failure under stress reversal fatigue. Specimens with higher concentration of fractured aggregates achieve longer fatigue lives.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Mag Raj Gehlot, Sandeep Shrivastava
Summary: This study evaluates the compatibility relationship between plaster bonds and the substrate under an accelerated aging environment, and finds that incorporating an appropriate amount of granite cutting waste can improve the strength parameters and adhesion of the cement mortar.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Min Zhang, Qirui Luo, Mingke Deng, Shixing Zhao
Summary: This study investigated the bond behavior between carbon FRCM composites with added short fibers and concrete substrates. The effects of different factors were considered and 36 specimens were tested and discussed. The experimental results were analyzed in terms of failure mode, load-slip curve, and characteristic parameters, and the contribution of weft yarns was taken into account in the developed bondslip model.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Dengkai Liu, Hongniao Chen, Ray Kai Leung Su
Summary: The susceptibility of building stones to fire and high temperature was investigated in this study by examining their physical and mechanical properties. The results show that both compressive and tensile properties of stones are affected by temperature changes. The tensile strength is particularly sensitive to temperature changes, requiring special attention to the components subjected to tensile stress in stone buildings. Principal component analysis was used to predict the mechanical properties of stones, providing a new method for calculating the residual mechanical properties after high temperature or fire.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Joso Maria Raposo, Eduardo Cavaco, Luis Costa Neves, Eduardo Julio
Summary: This paper investigates the correlation between the friction coefficient and the surface roughness of concrete-to-concrete interfaces. Experimental tests were performed on specimens with different surface treatments, and the surface roughness parameters were analyzed and correlated with the shear strength and friction coefficient. The results showed that certain roughness parameters had a strong positive correlation with the friction coefficient, while others had little or no correlation. A novel combined roughness parameter with optimized correlation was proposed.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Chiara Riccardi, Massimo Losa
Summary: The interest in using bio materials in asphalt pavements is growing due to economic reasons and environmental benefits. This study aimed to review the use of bio extenders as additives in binders, with a focus on replacements greater than 20% of fossil binder. The properties of bio-extended binders were found to vary substantially depending on the biomass source and production process.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
