Article
Thermodynamics
Renwang Nie, Qingyong Wu, Zhuqing Yu, Aiguo Wang, Xiaodong Shen
Summary: This study investigated a new method of utilizing coral waste in concrete, and found that GGBFS can enhance the hydration of CP in cement, improving the mechanical properties of the concrete structures.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Green & Sustainable Science & Technology
Tohid Yahyaee Nojoukambari, Ali Sadrmomtazi, Reza Kohani Khoshkbijari
Summary: This study investigates the use of Feldspar as a replacement for cement and the addition of GGBS to improve the mechanical properties and durability of mortars while reducing their environmental impacts. The results show that the substitution of additives significantly increases the heat stability of mortars and reduces their total CO2 emissions.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Green & Sustainable Science & Technology
Lei Zhang, Yang Jia, Hao Shu, Lei Zhang, Xi Lu, Fang Bai, Qianyu Zhao, De Tian
Summary: This study focused on preparing blast furnace slag (BFS) as a denitration catalyst, and investigated the effect of alkalinity on denitrification performance after modifying BFS with different alkaline and acidic oxides. The results showed that alkaline oxides modification improved denitration performance by generating -OH, while acidic oxides modification absorbed f-CaO in the slag and did not enhance denitrification. Increasing alkalinity of modified GGBS led to improved denitration performance.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Construction & Building Technology
Yasong Zhao, Jianming Gao, Zhenhai Xu, Shujun Li, Xu Luo, Gaofeng Chen
Summary: The study focuses on the interaction between ground granulated blast furnace slag (GGBFS) and waste clay brick powder (CBP) in blended cement containing 30% and 50% Portland cement. Both GGBFS and CBP decrease the hydration heat of blended cement, but GGBFS accelerates C3A hydration more significantly. GGBFS mainly improves compressive strength before 90 days, while CBP continues to enhance strength after an initial reduction.
CEMENT & CONCRETE COMPOSITES
(2021)
Article
Construction & Building Technology
Markssuel Teixeira Marvila, Afonso Rangel Garcez de Azevedo, Leandro Barbosa de Oliveira, Gustavo de Castro Xavier, Carlos Mauricio Fontes Vieira
Summary: The use of activated alkali cements (AAC) as a replacement for Ordinary Portland cement (OPC) is a viable alternative due to its advantages in utilizing waste materials and industrial by-products, as well as superior mechanical properties. AAC based on blast furnace slag showed excellent performance in various tests compared to OPC.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2021)
Article
Construction & Building Technology
H. N. Yoon, Joonho Seo, Seonhyeok Kim, H. K. Lee, Solmoi Park
Summary: The study reveals that the compressive strength of BFS-blended CSA cement with 30% BFS is comparable to that of pure CSA cement, and the main hydration products of BFS-blended CSA cement are identified as ettringite, monosulfate, Al(OH)(3), and stratlingite.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Environmental Sciences
Qiusong Chen, Shiyuan Sun, Yunmin Wang, Qinli Zhang, Liming Zhu, Yikai Liu
Summary: In this study, a combination of NaOH pretreatment and ground-granulated blast furnace slag (GGBFS) additives was used to solidify phosphogypsum (PG) for cemented paste backfill (CPB) with a lower carbon footprint. The NaOH pretreatment effectively removed approximately 95% of F within the PG, resulting in more hydration products and effective F and P retention candidates. The addition of GGBFS promoted the generation of additional cement hydrates. The macro mechanical performance analysis showed that the mixtures of pretreated-PG-GGBFS exhibited excellent mechanical performance. Elemental mapping and toxicity characteristic leaching procedures demonstrated competitive F and P immobilization ability compared to typical OPC binder and individual GGBFS addition. This study opens up new perspectives for synergistic recycling of PG and GGBFS in a profitable and low carbon footprint way.
Article
Construction & Building Technology
Min Jae Kim, Tetsuya Ishida, Won Jung Cho
Summary: This study aimed to improve the performance of FNS and GGBS incorporated in cement with an alkali activator. It was found that FNS adversely affected the physical properties of the mixed cement due to its low alkalinity, but a proper alkalinity and excellent physical properties were obtained when FNS was used with GGBS. In addition, the activation effect of the alkali activator was further enhanced in the ternary blended cement.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Yingbin Wang, Li Xu, Xingyang He, Ying Su, Wenjuan Miao, Bohumir Strnadel, Xiaoping Huang
Summary: This study systematically investigated the hydration and rheological behavior of ultra-fine ground granulated blast furnace slag (activated-BFS) with carbide slag and anhydrous phosphogypsum (AG) as combined activators. The results showed that the type of BFS played a limiting role in setting time, and their rheological behavior fitted with H-B model.
CEMENT & CONCRETE COMPOSITES
(2022)
Article
Construction & Building Technology
Adeolu Adediran, Juho Yliniemi, Patrick N. Lemougna, Priyadharshini Perumal, Mirja Illikainen
Summary: The use of waste-based reactive co-binders improves the properties of alkali-activated materials, making them suitable for construction applications.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Markssuel Teixeira Marvila, Afonso Rangel Garcez de Azevedo, Jose Alexandre Tostes Linhares Junior, Carlos Mauricio Fontes Vieira
Summary: Recent studies have shown that activated alkali cement (AAC) can be used as a substitute for Portland cement. This article evaluates the influence of different curing methods on the mechanical properties of AAC based on blast furnace slag. The results indicate that thermal curing and sodium solution curing are the most advantageous, promoting greater thermal energy and preventing the loss of alkaline ions from AAC.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Construction & Building Technology
Xiaohang Zhang, Xinchun Guan, Chongzhi Ma
Summary: The hydration depth, reflecting the thickness of hydrated cement particles, varies with particle sizes and plays a crucial role in improving the quality and economy of cement-based materials. A method combining backscattered electron images and stereological method is proposed to characterize hydration depths of cement particles in hardened cement-based materials. The accuracy of this method is demonstrated for cement particles below 16 μm.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Cheah Chee Ban, Liew Jia Jia, Kevin Khaw Le Ping, Rafat Siddique, Weerachart Tangchirapat
Summary: This study evaluated the physical and mechanical properties of cement containing ground granulated blast furnace slag (GGBS) and ground coal bottom ash (GCBA) at various cement replacement ratios. The optimum cement replacement level with GCBA was found to be 10%. Additionally, the appropriate binder combination ratio and dosage of superplasticizer were crucial for ternary blended paste. In conclusion, the incorporation of GCBA in combination with GGBS enhanced both the mechanical and physical properties compared to GGBS binary blended cement mortar.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Kaishi Kojima, Jihoon Kim, Ryoma Kitagaki, Yukio Hama
Summary: This study analyzed the microstructural changes in ordinary cement and hardened blast-furnace cement caused by repeated dry and wet cycles at high temperatures using solid-state nuclear magnetic resonance (NMR), time domain NMR, and mercury intrusion porosimetry. The results showed that the degree of coarsening of capillary porosity was lower in blast-furnace cement compared to ordinary cement, possibly due to the aluminum in the blast furnace slag improving the resistance of the C-S-H layer to compaction.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Engineering, Civil
Taeyeon Kim, Bongjik Lee, Seongwon Hong
Summary: The effect of curing temperature on the engineering properties of GGBS-CB slurry was investigated. The results showed that in the early stage of curing, the properties of the slurry were mainly affected by the curing temperature. However, as the curing time increased, the replacement ratio of GGBS became the main factor determining the properties of the slurry.
GEOMECHANICS AND ENGINEERING
(2022)
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)