Article
Green & Sustainable Science & Technology
Lander Frederickx, Thi Nhan Nguyen, Quoc Tri Phung
Summary: Geopolymers and other alkali-activated materials have been investigated as alternatives to Portland cement due to their reduced CO2 emissions, high binding capacities, and low permeabilities. This study aimed to develop geopolymers with high water-to-binder ratios and good mechanical strengths, while identifying the parameters that influence strength. The results showed that acceptable mechanical strengths can be achieved at higher water-to-binder ratios, and the dilution of the activating solution and the microstructure ratio were identified as important factors.
Article
Construction & Building Technology
Vivek Pratap Wagh, Mayank Sukhija, Ankit Gupta
Summary: Increased moisture susceptibility is a potential failure for warm-mix asphalt (WMA). Evaluating the bond strength between aggregate and asphalt binder is crucial to understanding the moisture damage mechanism. This study used the Pneumatic Adhesion Test (PAT) to assess the bond between various aggregates and warm mix (WM) modified asphalt binders. The results showed that the bonding relies on factors such as the aggregate type, base binder, and WM additives. The conditioning state (wet or dry) also affects the interfacial bonding.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Abdeldjalil Khelafi, Nouria Kaid, Rabah Soltani, Djamel Elddine Kerdal, Hamid Khelafi
Summary: This research work focused on the viability and valuation of recycled concrete sand aggregates (RCSAs) in the preparation of mortars. An alternative recycling process was proposed to improve the physical and mechanical properties of RCSAs-based mortars and promote efficient use of demolition concrete waste. The experimental results showed improvement and good interaction between the cement matrix and sand in RCSAs-based mortars, highlighting the effectiveness of the alternative recycling method in enhancing composition quality and mechanical performance.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Jnyanendra Kumar Prusty, Bulu Pradhan
Summary: The study evaluated the influence of sand-to-binder ratio and fly ash/GGBS blends on the durability performance and microstructural evolution of geopolymer mortar (GPM), presenting significant effects on flowability, strength, water absorption, permeable voids, acid resistance, and microstructural changes.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Magdalena Rajczakowska, Ilda Tole, Hans Hedlund, Karin Habermehl-Cwirzen, Andrzej Cwirzen
Summary: This research aims to verify the self-healing behavior of environmentally friendly multi-component binders. An experimental study is conducted to test the effect of binder composition and crack geometry on the self-healing efficiency of the green mortars. The results indicate that green binder composition affects the self-healing mechanism leading to different levels of performance recovery.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Jiashun Shi, Qing Chun, Shihu Feng, Cheng Liu, Zhiyong Liu, Dafu Wang, Yunsheng Zhang
Summary: Comprehensive quantitative characterization of ancient city wall bricks' pore structures is crucial for predicting the durability of historical masonry buildings. Previous studies have only utilized one or two methods to analyze the pore structures, while this study employed mercury intrusion porosimetry (MIP), low-temperature nitrogen adsorption (LTNA), and low-field nuclear magnetic resonance (LF-NMR) to assess nine different ancient city wall bricks. The results demonstrate that LF-NMR measured the surface relaxivity of ancient bricks ranging from 1.55 to 1.75 μm/s. Additionally, LF-NMR-derived porosity of blue bricks was significantly lower than the gravimetric method due to an increased presence of paramagnetic iron mineral phases. LTNA was found to be inappropriate for describing pore size distribution as the pore diameters primarily concentrated in the 100-1000 nm range. Moreover, the pore structures of ancient bricks in dried and water-saturated states were observed to differ, with the LF-NMR-derived pore size of white bricks being approximately half of the MIP-derived pore-throat size.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Biochemistry & Molecular Biology
Mohammad R. Irshidat, Nasser Al-Nuaimi, Mohamed Rabie
Summary: This study investigates the influence of carbon nanotubes (CNTs) on cementitious composites exposed to elevated temperatures, showing that CNTs can improve the residual mechanical strengths of cement mortar at high temperatures.
Article
Construction & Building Technology
Xiaohui Zeng, Huasheng Zhu, Xuli Lan, H. A. Umar, Youjun Xie, Guangcheng Long
Summary: The mechanical properties of CA mortar are closely related to its composition, with the volume fraction of cement hydrates being a key parameter affecting the elastic modulus and compressive strength. When asphalt is considered a pore or low modulus phase, there is a power function relationship between mechanical properties and composition parameters, and cement hydrates still play a significant role in contributing to the strength and elastic modulus of CA mortar.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Yonghui Li, Changchang Xia, Ruobin Wu, Yan Ma, Baogang Mu, Tianwen Wang, Evangelos Petropoulos, Shuichi Hokoi
Summary: Cultural heritage sites are constantly exposed to deterioration due to urban environmental phenomena, but plant landscaping can act as a potential regulator of the microenvironment, mitigating the adverse effects of the local climate. Through field measurements and numerical modeling, it was found that evergreen trees can effectively reduce the risk of deterioration on wall surfaces caused by freeze-thaw cycles, efflorescence, and subflorescence, providing a theoretical basis for sustainable preservation of cultural heritage sites.
BUILDING AND ENVIRONMENT
(2021)
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
Environmental Sciences
Zhi-Hai He, Xu-Dong Han, Jia-xu Jin, Jiang-shan Li, Wei Tang, Jin-yan Shi
Summary: For eutrophic water bodies, potassium permanganate is an effective pre-oxidant to remove algae and its residue in water treatment sludge. Recycling water treatment sludge in concrete is an environmentally friendly and high-value utilization measure. However, little research has been done on the effect of manganese-rich drinking water sludge ash (DWSA) on concrete. The effect of water-binder ratio (w/b) on strength, shrinkage and microstructural characteristics of concrete containing DWSA was investigated, and the structural behavior was explained from a nanoscale perspective. The results show that recycling 10 % DWSA in concrete improved the strength and shrinkage resistance of the samples. Reducing the w/b effectively increased the strength of DWSA-modified concrete and reduced the shrinkage deformation. Meanwhile, reducing the w/b also reduced the interfacial transition zone width of DWSA-modified concrete. Recycling DWSA in concrete effectively reduced the total carbon footprint and cost of the mixture. The combined application of reducing the w/ b and incorporating DWSA effectively improved the economic and environmental benefits of concrete material. For the concrete modified with 10 % DWSA (w/b = 0.3), its cost and carbon emissions are reduced by 14 %-21 % and 19 %-25 % compared with the reference sample, respectively. Overall, this study reveals the action mechanism of DWSA in cement system at different w/b from nanoscale perspective, and gives a new insight on determining the optimal w/b in full-scale application of DWSA concrete.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Archaeology
Changqing Li, Chun Wu, Heng Gao, Su Wang, Yanli Guo, Yu Chen, Pujun Jin
Summary: The Xi'an City Wall is a huge building with historical and modern significance, and its brick-soil composite structure contains mineral particles mainly composed of alumosilicates-mixture and quartz.
JOURNAL OF CULTURAL HERITAGE
(2023)
Article
Construction & Building Technology
Sumin Im, Junxing Liu, Seongmin Cho, Jaegeun Moon, Jaeyeon Park, Kwangwoo Wi, Seungwook Seok, Seungmin Lim, Sungchul Bae
Summary: This study systematically investigated the effect of different water desorption behaviors of lightweight aggregates (LWAs) in cement mortars for various water-to-binder ratios on the mechanical properties of cement mortars. The results showed an improvement in the morphology of the interfacial transition zone (ITZ) around the LWAs but also a significant increase in porosity. Nanoindentation tests revealed a deterioration of the elastic moduli and hardness of mortars containing LWAs at all investigated water-to-binder ratios.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Green & Sustainable Science & Technology
Wu-Jian Long, Zhuorui Wu, Kamal H. Khayat, Jingjie Wei, Biqin Dong, Feng Xing, Jinrui Zhang
Summary: This study compared the dynamic mechanical properties, ecological and economic efficiency of fiber-reinforced mortars (FRMs) made with different binder systems. The results showed that FRMs made with limestone calcined clay cement (LC3) exhibited higher loss factors, appropriate pore size distributions, and good fiber-matrix interfacial properties. Additionally, FRMs made with LC3 showed lower energy consumption and cost compared to other types of mortars.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Chemistry, Physical
Yifan Jiang, Guifeng Liu, Zhengfa Chen, Qifeng Lyu
Summary: Applying multiwalled carbon nanotubes (MWCNTs) in recycled fine aggregates (RFA) mortars has been found to enhance their mechanical characteristics. The quality of RFA is correlated with the initial compressive strength, and an appropriate amount of MWCNTs can improve the mechanical properties of the mortar.
FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES
(2023)
Article
Chemistry, Multidisciplinary
Y. K. Kong, Y. Song, K. Kurumisawa, T. Wang, D. Yan, Q. Zeng, X. Zhou, S. Ruan
Summary: The study investigated the feasibility of using hydrated cement paste (HCP) as a CO2 sponge by carbonating, calcining, and re-carbonating the HCP. Through microstructural analysis, the study examined the capacity of CO2 sequestration and release via HCP, as well as the carbonation phases formed within the cement paste. Initial results showed that HCP could effectively sequester CO2 and release it during the re-carbonation process, with moisture playing a significant role in the efficiency of the process.
JOURNAL OF CO2 UTILIZATION
(2022)
Article
Construction & Building Technology
Yidong Xu, Yufeng Song
Summary: A computational framework was proposed to study the corrosion resistance of concrete structures by transforming the chemical action of nonuniform steel corrosion into mechanical action. A prediction model of cover cracking was proposed and validated through experiments.
CEMENT & CONCRETE COMPOSITES
(2022)
Article
Engineering, Environmental
Liang Chen, Yuying Zhang, Lei Wang, Shaoqin Ruan, Junfeng Chen, Huanyu Li, Jian Yang, Viktor Mechtcherine, Daniel C. W. Tsang
Summary: This study introduces a new design of biochar-augmented concrete, which promotes cement hydration and enhances the strength of concrete by incorporating biochar as aggregate and supplementary cementitious materials. Life cycle assessment and cost-benefit analysis demonstrate that biochar-augmented concrete can significantly reduce CO2 emissions and generate economic profit.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Materials Science, Ceramics
Yufeng Song, Xiaoqian Qian, Dongming Yan, Cise Unluer, Yu Peng, Deyu Kong, Chuanlin Hu, Su Wang, Shaoqin Ruan
Summary: In this study, different types and contents of seeds were introduced in reactive magnesia cement (RMC) systems. The results showed that seeded RMC samples exhibited accelerated hydration/carbonation, resulting in faster strength development. Among the seeds, magnesite performed the best due to its more homogenous microstructures. Further experiments confirmed the nucleation effects of seeds in RMC formulations, and it was found that seeds had a higher affinity for Mg2+ ions, making them effective accelerators for curing RMC-based concrete products on a large scale.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Construction & Building Technology
Yufeng Song, Yi Zhang, Siyi Shen, Chenyu Pan, Dongming Yan, Zhiguang Wang, Su Wang, Shaoqin Ruan
Summary: This study aims to investigate the effects of different Ca(OH)(2) contents on the mechanical performance and corrosion behaviors of steel in Calcium sulfoaluminate (CSA) cement. The results showed that appropriate addition of Ca(OH)(2) (approximately 6%) in CSA mortar had positive effects on strength, while excessive addition delayed the hydration reaction of CSA. Furthermore, the quantity of certain hydration phases such as Al(OH)(3) reduced with increased Ca(OH)(2) content, resulting from their reaction with Ca(OH)(2). The study also provided insights into the relationship between corrosion current density and mortar resistivity in the CSA/Ca(OH)(2) system.
MATERIALS AND STRUCTURES
(2023)
Article
Green & Sustainable Science & Technology
Rui Ma, Lifeng Zhang, Yufeng Song, Gaohang Lin, Xiaoqian Qian, Kuangliang Qian, Shaoqin Ruan
Summary: With the depletion of river sand and rising costs of quartz sand, researchers are exploring the use of manufactured sand for ultra-high performance concrete (UHPC). However, challenges arise due to the fine particles and high water demand. This study aims to overcome these challenges by using recycled manufactured sands to prepare UHPC while maximizing their original gradation.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Construction & Building Technology
Tao Meng, Haiying Yu, Yuxi Zhao, Shaoqin Ruan
Summary: Based on Zhejiang Province, this study evaluates the CO2 emissions, environmental impacts, and energy consumption associated with the production of natural concrete, recycled concrete, and nano-SiO2 intensified recycled concrete. The results show that using concrete in a marine environment and using recycled aggregates can shorten the service life of concrete structures, but the addition of nano-SiO2 can extend it. The environmental impacts and carbon footprint of recycled concrete and nano-SiO2 intensified recycled concrete were significantly lower than those of natural concrete. Therefore, this pioneer study's strength and service life-oriented environmental assessment can promote the upcycling of construction waste in the concrete production field.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Construction & Building Technology
Chenyu Pan, Yufeng Song, Yuxi Zhao, Tao Meng, Yanlin Zhang, Ruohong Chen, Xiangming Zhou, Shaoqin Ruan
Summary: This study investigates the impact of recycled concrete aggregates (RCA) on the performances of reactive magnesia cement (RMC) formulations. The results suggest that RMC samples with carbonated RCA show the best 28-day strength and a faster strength gain, which is attributed to the refined microstructure.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Engineering, Civil
Songsong Lian, Tao Meng, Yuxi Zhao, Zhicheng Liu, Xiangming Zhou, Shaoqin Ruan
Summary: The diffusion behavior of chloride in recycled concrete was found to be different from that in normal concrete due to the high porosity of recycled aggregates. The maximum chloride concentration in the drying-wetting environment increased rapidly, but the decrease in the chloride diffusion coefficient was slower. The relationship between several parameters related to chloride diffusion was established, and a more sophisticated model considering key indexes was proposed.
Article
Construction & Building Technology
Liyun Pu, Shaoqin Ruan, Chenyu Pan, Yufeng Song, Fangjun Zhou, Junying Lai, Kuangliang Qian, Qiang Li
Summary: This study investigates the impact of carbonation degree on the strength and pore structures of reactive magnesia cement (RMC) concrete by pretreating recycled aggregates using the carbonation technique. The results show that a higher carbonation degree contributes to strength improvement by forming well-developed carbonates and reducing porosity. However, a lower water-to-cement ratio improves mechanical performance by refining pore structures. The correlation between carbonation degree and strength is weaker due to different types of hydrated magnesium carbonates formed. The study also demonstrates that CO2 diffusion in RMC samples occurs through interfacial transition zones (ITZs) rather than capillary pores.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Guangcheng Sun, Zhiguang Wang, Chengkun Yu, Xiaoqian Qian, Ruohong Chen, Xiangming Zhou, Yiwei Weng, Yufeng Song, Shaoqin Ruan
Summary: The producibility of calcium sulphoaluminate cement-based foam concrete (CSA-FC) with nano-clay and industrial by-products through concrete extrusion was confirmed. The use of appropriate amounts of nano-clay and desulfurized gypsum improved the hydration acceleration and extrudability of samples. A suitable mix design of CSA-FC with satisfactory performance, low carbon footprint, and cost was proposed through the extrusion technology.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Construction & Building Technology
Zhiguang Wang, Liyun Pu, Yuchen Yao, Jie Yang, Liping Li, Jinrong Luo, Shengquan Zhu, Qiang Zeng, Shaoqin Ruan
Summary: This study investigated the use of hydrated magnesia carbonates as the binding material for the production of aerated concrete, and studied the impacts of material design on the properties of aerated concrete. The results showed that the selection of Ca/Mg ratio and water/binder ratio in raw materials directly determined the properties of the aerated concrete.
JOURNAL OF BUILDING ENGINEERING
(2023)
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)