Article
Construction & Building Technology
Zihao Liu, Koji Takasu, Hidehiro Koyamada, Hiroki Suyama
Summary: The study found that including fly ash as part of the fine aggregate in concrete can increase strength, reduce shrinkage, and decrease creep. Introducing a parameter to capture the effect of fly ash content in the prediction model accurately predicts the creep strain of concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Ivan Gabrijel, Marijan Skazlic, Nina Stirmer
Summary: Wood biomass is widely used in the European Union, but the disposal of its ash requires proper solutions to prevent pollution. This study found that incorporating wood ash in concrete reduces compressive strength and increases capillary absorption, but has little influence on gas permeability. Wood ash with high CaO content can reduce drying shrinkage in concrete.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Chemical
Fanghui Han, Hongbo Zhang, Juanhong Liu, Shaomin Song
Summary: The study revealed that ITP had some influence on the performance of concrete, partially replacing fly ash can improve the early-age compressive strength of concrete but decrease the later-age compressive strength. Increasing ITP content can enhance carbonation resistance and frost resistance, while the best sulfate attack resistance is achieved with a 50% substitution ratio.
Article
Construction & Building Technology
Penggang Wang, Hua Fu, Tengfei Guo, Wenqiang Zuo, Haitao Zhao, Li Tian, Chunlei Chen
Summary: The study investigates the volume deformation of steam-cured concrete, showing that autogenous shrinkage occurs during the constant temperature stage of steam curing and the shrinkage after steam curing is mainly due to drying effects. The addition of fly ash can increase shrinkage during steam curing but is beneficial for shrinkage after steam curing. A micromechanical model based on capillary tension, interior humidity, and hydration degree accurately predicts the total and autogenous shrinkage of concrete specimens after steam curing.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Jnyanendra Kumar Prusty, Bulu Pradhan
Summary: The presence of chloride ions significantly affected the consistency, strength, and microstructure of geopolymer concrete (GPC). Fly ash-GGBS based geopolymer concrete (FSGC) showed higher strength, lower corrosion activity, and lower chloride content compared to fly ash based geopolymer concrete (FGC). XRD and EDS analysis confirmed the improved performance of FSGC in terms of higher peak intensity of aluminosilicate gels, presence of C-S-H gel, and higher atomic Ca/Si ratio.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Haiming Chen, Qian Chen, Yangchen Xu, Abubakar S. Lawi
Summary: Adding silica fume (SF) and fly ash (FA) into polypropylene (PP) filled mortar has shown to reduce porosity and water absorption while improving compressive and flexural strength. The combination of SF and FA also promoted strength development and reduced shrinkage, providing a new solution to the issues of low strength and large shrinkage in plastic mortar.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Se-Jin Choi, Ji-Hwan Kim, Sung-Ho Bae, Tae-Gue Oh
Summary: This study investigated the performance of ternary cement mortar including ferronickel-slag powder and fly ash, revealing that mixes with ferronickel-slag powder had higher compressive strength but larger drying shrinkage.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Chemical
Yanfeng Nie, Jinyan Shi, Zhihai He, Baifa Zhang, Yiming Peng, Jingzhou Lu
Summary: This study investigates the use of metakaolin as a modifier for high-volume fly ash (HVFA) concrete. It is found that incorporating an appropriate amount of metakaolin improves the mechanical properties and microstructure of HVFA concrete, reducing drying shrinkage and porosity. Furthermore, the inclusion of metakaolin helps reduce the carbon footprint and cost of HVFA concrete.
Article
Green & Sustainable Science & Technology
Vivek Gupta, Salman Siddique, Sandeep Chaudhary
Summary: The study shows that using hydrated lime instead of slaked lime and employing a two-stage mixing sequence to produce fly ash bricks with 15% moisture content can enhance mechanical and durability performance. Furthermore, economic and environmental comparisons indicate that hydrated lime fly ash bricks are more beneficial than fired clay bricks.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Construction & Building Technology
Yu Sun, Lihan Li, Jian Liao, Chongwei Huang
Summary: An experimental study compared the compaction and dry shrinkage properties of cement-stabilized reclaimed lime-fly ash macadam (CSR) with cement-stabilized macadam (CSM). The results showed that CSR had a higher optimum moisture content and lower maximum dry density compared to CSM. The smaller the size of the reclaimed particles, the higher the optimum moisture content and lower the maximum dry density. Additionally, CSR had higher dry shrinkage properties, with increasing substitution rate and cement content.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Engineering, Civil
Mavoori Hitesh Kumar, Nihar Ranjan Mohanta, Niharika Patel, Sandeep Samantaray, S. V. Bhargava Reddy
Summary: Drying shrinkage is an important durability property of concrete that directly affects other properties. This study compared the effects of replacing cement with fly ash (FA) and metakaoline (MK) on drying shrinkage and strength. The results showed that a combination of 25% FA and 13.5% MK significantly improved the strength, drying shrinkage, and resistance to crack width formation in concrete.
IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY-TRANSACTIONS OF CIVIL ENGINEERING
(2022)
Article
Construction & Building Technology
Xiao Chen, Jiachen Zhang, Mingyu Lu, Bowen Chen, Shuaiqi Gao, Jiawei Bai, Haoyu Zhang, Yin Yang
Summary: The study showed that the mechanical properties of fly ash based geopolymers initially increase and then decrease with the increase of CaO and SO3 content. The addition of CaO and SO3 promoted the geopolymer reaction, increased the gel products and generated ettringite, enhancing the strength of the matrix and compensating the shrinkage of geopolymer.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Engineering, Civil
Hba Xalid Mohammed, Ahmed Salih Mohammed, A. M. T. Hassan
Summary: This study predicts the ultimate compression stress of concrete incorporated with Fly Ash and Ground Granulated Blast Furnace (GGBS). The study examines the impact of different parameters on the compressive strength of the concrete and uses various models to predict the strength, with the Artificial Neural Network model demonstrating the highest accuracy.
Article
Construction & Building Technology
Ghasan Fahim Huseien, Abdul Rahman Mohd Sam, Rayed Alyousef
Summary: The study found that adding an appropriate amount of fly ash can improve the workability of self-compacting alkali-activated concrete, but it may also reduce the compressive strength and flexural strength of the concrete. Therefore, adding fly ash in concrete mixtures is a promising approach for promoting sustainable development in the construction industry.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Sirin Kurbetci, Memduh Nas, Mustafa Sahin
Summary: The rapid development of the construction industry has led to increased consumption of aggregate resources, resulting in depletion of existing reserves. Using recycled aggregate in mortar production can reduce the use of natural materials and minimize demolition waste. The study found that increasing the use of recycled aggregate reduces the strength of mortar, but improves its abrasion resistance.
ADVANCES IN CONCRETE CONSTRUCTION
(2022)
Proceedings Paper
Materials Science, Multidisciplinary
Nikhil Kumar Degloorkar, Rathish Kumar Pancharathi
Summary: This study investigates the use of pozzolanic materials and particle packing theory to enhance the strength of non-hydraulic lime-based mortars. The results show that using MTM particle packing theory for sand can achieve the lowest minimum void ratio and highest compressive strength.
MATERIALS TODAY-PROCEEDINGS
(2022)
Article
Construction & Building Technology
Degloorkar Nikhil Kumar, Rathish Kumar Pancharathi
Summary: The characterization of ancient materials and development of alternative materials with similar properties is crucial for preserving cultural and heritage sites. A study on floating bricks at an Indian heritage site revealed that the bricks were made of clay fired at low temperatures, explaining their lightweight and ability to float due to non-interconnected porosity. Advanced analytical techniques such as SEM-EDS, XRD, and FTIR were used to confirm the material composition and characteristics.
CEMENT WAPNO BETON
(2021)
Article
Archaeology
Nikhil Kumar Degloorkar, Rathish Kumar Pancharathi
JOURNAL OF ARCHAEOLOGICAL SCIENCE-REPORTS
(2020)
Proceedings Paper
Materials Science, Multidisciplinary
Nikhil Kumar Degloorkar, Rathish Kumar Pancharathi
MATERIALS TODAY-PROCEEDINGS
(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)