Article
Chemistry, Physical
Supphanut Chuenjaidee, Pitthaya Jamsawang, Pornkasem Jongpradist, Xiaobin Chen
Summary: This research investigates the flexural behavior of cement-treated sand (CTS) reinforced with uniaxial geogrid (CTSG). The results show that the type of geogrid and the number of reinforcement layers affect the flexural behavior of CTSG. High-strength geogrid with a double reinforcement layer proved to be the most effective in enhancing peak strength and toughness. Single and double reinforcement layers with all geogrid types can reduce surface cracks.
Article
Construction & Building Technology
Rishi Singh Chhabra, G. D. R. N. Ransinchung, Sk Sohel Islam
Summary: This study focuses on the sustainable utilization of RAPM in the CTB layer by incorporating chemical stabilizers through the FDR method. Laboratory testing and field monitoring showed that a mix with 4.5% cement and 4% chemical stabilizer provided the best results in terms of strength and durability, with a 45% cost reduction compared to traditional methods.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Green & Sustainable Science & Technology
William Fedrigo, Lucas Fraporti Heller, Lelio Antonio Teixeira Brito, Washington Peres Nunez
Summary: This study fills the research gap on the fatigue behavior of cold recycled cement-treated mixtures (CRCTMs) by conducting long-term curing fatigue tests and comparing the results with three different design methods. The experiment and modeling showed that CRCTMs with higher reclaimed asphalt pavement (RAP) contents exhibit superior fatigue behavior, while those with lower RAP contents experience abrupt stiffness loss, requiring thicker structures. The study also found that the MeDiNa method is more conservative and highlights the importance of calibration based on long-term pavement performance data.
Article
Construction & Building Technology
Liting Yu, Xudong Li, Rui Li, Jiulong Hu, Jianzhong Pei
Summary: This paper focuses on the strength formation mechanism of emulsified-asphalt cold recycled mixtures with all old mineral in order to solve the problem of semirigid base damage in the initial period of use. The optimum moisture content and amount of emulsified asphalt in the regenerated base were determined through tests, and the performance of the mixtures was verified according to the designed optimum ratio. The gray correlation method was used to analyze the performance-influencing factors and determine the rationality of the base designs. The research results can be used for pavement base recycling, improving pavement construction efficiency and contributing to sustainable environmentally friendly road construction.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2022)
Article
Engineering, Environmental
Sara Bressi, Michele Primavera, Joao Santos
Summary: This study compares the environmental performance of sixteen Cement Treated Base (CTB) mixtures with different cement percentages, production methods, and recycling procedures. The results show that higher cement percentages allow for thinner base-course layers, offsetting the increased environmental burdens from cement production and transport. Additionally, on-site production significantly reduces environmental impacts compared to central-plant-mixed production.
RESOURCES CONSERVATION AND RECYCLING
(2022)
Article
Construction & Building Technology
Rishi Singh Chhabra, Gondaimei Ransinchung Rongmei Naga
Summary: Using RAP material with stabilizer can effectively solve new material issues, reduce haulage distance, and save fuel costs. A mixed design of the CTB layer was formulated to make maximum use of RAP material in a sustainable way, and the mechanical and durability properties were evaluated through laboratory tests. The optimal mix was determined based on the Unconfined Compressive Strength (UCS) value and flexural strength, and the durability properties were analyzed through various tests. The results showed that using 70% RAP with stabilizer leads to a strong and durable CTB mix.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Roz-Ud-Din Nassar, Parviz Soroushian, Anagi Balachandra, Shumayal Nassar, Rankothge Weerasiri, Nalin Darsanasiri, Nastran Abdol
Summary: The study compared the effects of different matrix formulations on extruded cellulose fiber cement products, it was found that most additives altered the physical properties of the products to some extent but did not significantly affect their mechanical properties. Additives increased the moisture absorption capacity of extruded fiber cement products and improved ductility after saturation.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2021)
Article
Construction & Building Technology
S. Pouget, P. Marsac, A. Pedraza, C. Sauzeat, H. Di Benedetto, V Gaudefroy, L. Boulange, A. Pevere, V Mouillet
Summary: This paper presents the main results of the French collaborative project Improvmure, which focused on the recycling of bituminous mixtures and the use of warm manufacturing process. The study showed the feasibility of multiple recycling cycles with high rates and the advantages of warm mix manufacturing process.
ROAD MATERIALS AND PAVEMENT DESIGN
(2023)
Article
Construction & Building Technology
Qinshi Hu, Jiupeng Zhang, Yinzhang He, Junbo Li, Chuangye Song, Guangcan Li
Summary: This research evaluates the mechanical properties of a cold recycled mixture using foam asphalt for waste semirigid base material, and investigates the softening mechanism of semirigid base milling material. The results show that the recycled material has sufficient mechanical strength for use in road base layers, and the cold recycling process reduces the stiffness and increases the flexibility of the mixture, thereby reducing pavement diseases.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2023)
Article
Materials Science, Characterization & Testing
William Fedrigo, Thais Raduenz Kleinert, Washington Peres Nunez, Angela Gaio Graef, Luiz Carlos Pinto Da Silva Filho, Lelio Antonio Teixeira Brito
Summary: This research focuses on the shrinkage issue of cold recycled cement-treated mixtures. The effects of cement and reclaimed asphalt pavement (RAP) contents, as well as curing time, on the shrinkage of these mixtures were evaluated. The results suggest that finer mixtures have higher shrinkage potential, while coarser mixtures tend to shrink less. Increasing RAP contents can help reduce the shrinkage of finer mixtures. Shrinkage increases with time, especially in the early stages, emphasizing the importance of moisture preservation. Cement content has a minor impact on shrinkage, contradicting the practice of using low cement contents to reduce shrinkage hazards.
JOURNAL OF TESTING AND EVALUATION
(2023)
Article
Chemistry, Physical
Jerzy Kukielka, Wojciech Bankowski, Krzysztof Mirski
Summary: The study described the properties of asphalt-cement concrete (ACC) with reclaimed asphalt pavement (RAP), Portland cement, sand, and rubber powder as a material for road pavements, and analyzed the laboratory test results.
Article
Engineering, Mechanical
Sajjad Noura, Ehsan Yaghoubi, Sam Fragomeni, P. L. P. Wasantha, Rudi Van Staden
Summary: This research focuses on the stiffness characteristics and fatigue life of asphalt mixtures made of recycled materials. The experiments were conducted under various conditions, and the results showed that some mixtures made of recycled materials exhibited better stiffness and fatigue performance compared to control mixtures. The study also optimized existing fatigue life prediction models and developed a new prediction model based on aggregate size and percentages of recycled materials. The developed model showed improved accuracy in predicting fatigue life.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Green & Sustainable Science & Technology
Abdulaziz Alsaif, Mohammad Alshannag
Summary: Laboratory tests were conducted to evaluate the flexural performance of Portland cement mortars reinforced with recycled fibers. The results showed that a blend of 0.5% RTSF and 0.5% RPF exhibited superior flexural characteristics and toughness compared to mixes containing only manufactured steel fibers. The positive synergistic effect of the fiber blends on post-cracking strength and flexural toughness was particularly pronounced at this dosage.
Article
Construction & Building Technology
Adeyemi Adesina, Sreekanta Das
Summary: This study investigates the feasibility of using recycled asphalt as aggregates in ECC, finding that it may compromise the performance of traditional ECC but offset the loss through benefits in carbon footprint and cost reduction. Despite the compromised performance, all ECC mixtures developed in the study are found suitable for structural applications.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Muhammad Suleman, Naveed Ahmad, Sibghat Ullah Khan, Tufail Ahmad
Summary: The study aimed to investigate the impact of Waste Steel Fibers (WSF) on the flexural performance of cement-treated base (CTB) mixtures, with a focus on flexural fatigue and flexural strength. Results showed that WSF reinforcement significantly enhanced the strength and fatigue life of the mixtures.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Sridhar Reddy Kasu, Sutapa Deb, Nilanjan Mitra, Amarnatha Reddy Muppireddy, Sudhakar Reddy Kusam
CONSTRUCTION AND BUILDING MATERIALS
(2019)
Article
Construction & Building Technology
Sridhar Reddy Kasu, Nilanjan Mitra, Amarnatha Reddy Muppireddy
Summary: The study investigates the fatigue performance of concrete with polyester microfiber under dynamic loading, finding that a fiber dosage of 0.9 kg/m³ significantly affects fatigue lives. S-N curves were formulated to analyze the relationship between fatigue performance and fiber dosage. Covariance analysis showed that initial stiffness and stress levels significantly affect fatigue lives.
ROAD MATERIALS AND PAVEMENT DESIGN
(2021)
Article
Construction & Building Technology
Sridhar Reddy Kasu, Sandesh Patel, Amaranatha Reddy Muppireddy
Summary: Research on the behavior and structural integrity of square-shaped short slabs in highway pavement has attracted significant interest, but studies on curling deformations and performance are limited. This study focused on measuring curling displacements of cast-in-situ short paneled concrete pavements on a lean concrete base in NH-18 test sections. The results show that slab length has a more significant impact on curling compared to thickness and interface conditions, and there is a time lag between maximum temperature gradient and slab response.
INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING
(2022)
Article
Construction & Building Technology
Sridhar Reddy Kasu, Jagadeesh Tangudu, Anush K. Chandrappa, Muppireddy Amaranatha Reddy
Summary: This study investigates the influence of dry lean concrete (DLC) stiffness on the tensile stresses in plain cement concrete (PCC) slabs using Finite Element (FE) analysis. Improved DLC base stiffness reduces stresses in PCC slabs, with varying effects depending on the bonded or un-bonded base and positive or negative temperature differentials in the concrete pavement.
ROAD MATERIALS AND PAVEMENT DESIGN
(2022)
Article
Engineering, Civil
Sridhar Reddy Kasu, Sandesh Patel, Anush K. Chandrappa, Amaranatha Reddy Muppireddy
Summary: This study investigates the curling behavior of cast-in-situ short paneled concrete pavements (CiSPCP) through field observations and theoretical analysis. The findings show that the occurrence of maximum slab curl does not align with the maximum temperature gradient, indicating a lag in stress development. This observation is important for the design and construction of concrete pavements.
TRANSPORTATION RESEARCH RECORD
(2022)
Article
Materials Science, Multidisciplinary
S. T. Swarna, K. S. Reddy, M. A. Reddy, B. B. Pandey
ADVANCES IN CIVIL ENGINEERING MATERIALS
(2018)
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)
