Construction and Building Materials最新文献

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High-packing-rate assembly method for mesoscopic modeling of asphalt mixtures based on genetic algorithm 基于遗传算法的沥青混合料细观模型高填充率装配方法
IF 8 1区 工程技术
Construction and Building Materials Pub Date : 2025-10-07 DOI: 10.1016/j.conbuildmat.2025.143789
Jia Zhang, Guoqiang Liu
{"title":"High-packing-rate assembly method for mesoscopic modeling of asphalt mixtures based on genetic algorithm","authors":"Jia Zhang,&nbsp;Guoqiang Liu","doi":"10.1016/j.conbuildmat.2025.143789","DOIUrl":"10.1016/j.conbuildmat.2025.143789","url":null,"abstract":"<div><div>The mesoscopic structure of asphalt mixtures significantly influences their macro-mechanical properties. An artificial random generation technology has been extensively implemented for mesoscopic modeling of asphalt mixtures. However, during the aggregate assembly process, conventional random packing method struggles to achieve dense aggregate spatial arrangements, especially in 3D modeling. To address this limitation, a high-density packing method that optimizes the geometric centers and three-axis rotation angles of aggregates using a genetic algorithm was developed, based on rigid body motion principles. This approach was applied to construct a mesoscopic numerical model of an AC-13 asphalt mixture with an 82 % aggregate placement rate. Furthermore, uniaxial compression simulations using the generated model demonstrated strong agreement with experiments, predicting macro-dynamic modulus values within 20 % deviation from the physical test. The proposed method provides an efficient tool for generating a more reliable mesoscopic structure in asphalt mixture modeling, offering improved accuracy for numerical simulations in pavement engineering.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"497 ","pages":"Article 143789"},"PeriodicalIF":8.0,"publicationDate":"2025-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145264539","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Microwave heating characteristics of asphalt mixtures containing rejuvenator-loaded fibers for self-healing purposes 自愈用回春剂纤维沥青混合料的微波加热特性
IF 8 1区 工程技术
Construction and Building Materials Pub Date : 2025-10-07 DOI: 10.1016/j.conbuildmat.2025.143911
Yan Li , Yu Wu , Shihao Li , Yizhen Wang , Gaoang Yuan , Rongquan Li , Zhengyang Fang , Bowei Sun
{"title":"Microwave heating characteristics of asphalt mixtures containing rejuvenator-loaded fibers for self-healing purposes","authors":"Yan Li ,&nbsp;Yu Wu ,&nbsp;Shihao Li ,&nbsp;Yizhen Wang ,&nbsp;Gaoang Yuan ,&nbsp;Rongquan Li ,&nbsp;Zhengyang Fang ,&nbsp;Bowei Sun","doi":"10.1016/j.conbuildmat.2025.143911","DOIUrl":"10.1016/j.conbuildmat.2025.143911","url":null,"abstract":"<div><div>Microwave heating has emerged as an effective method to promote the self-healing process of asphalt pavements by controlling the temperature conditions required for effective repair. Nevertheless, the microwave thermal response of asphalt mixtures containing encapsulated rejuvenators has not been fully characterized. In this study, the microwave heating characteristics and their correlation with the self-healing behavior of asphalt mixtures containing rejuvenator-loaded fibers were systematically investigated. The critical self-healing temperature was determined via frequency sweep tests conducted using a dynamic shear rheometer. Infrared thermography was then employed to examine temperature distribution and evolution during microwave heating and subsequent natural cooling. Two novel indicators—healing duration and healing energy—were introduced to correlate thermal-temporal parameters with self-healing potential. Results showed that the critical self-healing temperature decreased with increasing asphalt penetration grade and was slightly lower than the corresponding softening point. The incorporation of rejuvenator-loaded fibers enhanced microwave heating rate and improved temperature uniformity. A minimum irradiation time of 40 s was required for effective self-healing. The majority of healing occurred during the cooling phase rather than during microwave irradiation. Extended microwave irradiation time was the critical factor in cold environments, while employing a high fiber content was highly advantageous in warm environments. These findings provide a theoretical foundation for designing energy-efficient microwave-responsive asphalt pavements with enhanced durability.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"497 ","pages":"Article 143911"},"PeriodicalIF":8.0,"publicationDate":"2025-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145263784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Modification of magnesium phosphate cement by lead-zinc tailings: Dual benefits in mechanical strength enhancement and leaching toxicity reduction 铅锌尾矿改性磷酸镁水泥:提高机械强度和降低浸出毒性的双重效益
IF 8 1区 工程技术
Construction and Building Materials Pub Date : 2025-10-07 DOI: 10.1016/j.conbuildmat.2025.143906
Jianfeng Li , Linjie Chen , Bin Li , Bing Chen
{"title":"Modification of magnesium phosphate cement by lead-zinc tailings: Dual benefits in mechanical strength enhancement and leaching toxicity reduction","authors":"Jianfeng Li ,&nbsp;Linjie Chen ,&nbsp;Bin Li ,&nbsp;Bing Chen","doi":"10.1016/j.conbuildmat.2025.143906","DOIUrl":"10.1016/j.conbuildmat.2025.143906","url":null,"abstract":"<div><div>Lead-zinc tailings (LZTs) are industrial by-products generated during the mining and beneficiation of lead-zinc mines, which have long been unable to be effectively utilized, causing numerous adverse effects to natural environment. This study investigated effects of LZTs on the properties of magnesium phosphate cement (MPC) and explored leaching toxicity of LZTs-MPC. The results showed that LZTs improved the workability of MPC and decreased its hydration heat. LZTs could enhance the compressive strength of MPC. When LZTs replaced 20 % of MgO, the 28d compressive strength of MPC reached its maximum value of 55.1 MPa, which was 17.5 % higher than that of control group. The incorporation of LZTs into MPC did not result in the formation of new crystalline phases and LZTs primarily served as fine aggregate. An appropriate amount of LZTs improved integrity and compactness of MPC matrix, thereby enhancing the mechanical strength of MPC. High addition of LZTs further promoted formation of struvite, which compensated for the loss of mechanical strength and made it possible for the large-scale recycling and utilization of LZTs. In addition, MPC exhibited an excellent solidification/stabilization effect to harmful elements in LZTs, with solidification/stabilization efficiency all surpassing 97 % for lead, zinc and cadmium elements.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"497 ","pages":"Article 143906"},"PeriodicalIF":8.0,"publicationDate":"2025-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145264536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Shear behaviour of recycled asphalt pavement and natural aggregate: Large direct shear testing and machine learning based strength prediction 再生沥青路面和天然骨料的剪切性能:大型直剪试验和基于机器学习的强度预测
IF 8 1区 工程技术
Construction and Building Materials Pub Date : 2025-10-07 DOI: 10.1016/j.conbuildmat.2025.143931
Pravez Alam , Shailja Bawa
{"title":"Shear behaviour of recycled asphalt pavement and natural aggregate: Large direct shear testing and machine learning based strength prediction","authors":"Pravez Alam ,&nbsp;Shailja Bawa","doi":"10.1016/j.conbuildmat.2025.143931","DOIUrl":"10.1016/j.conbuildmat.2025.143931","url":null,"abstract":"<div><div>This study conducts a systematic series of large direct shear experiments to examine the effect of replacing natural aggregate (NA) with reclaimed asphalt pavement (RAP) in coarse (4.75–10 mm) blends on shear behaviour and evaluates the performance of data driven models for predicting shear strength. Eight mixtures of NA and RAP were tested in a large direct shear machine under normal stresses of 50, 100 and 150 kPa, generating 1440 records. Increasing RAP content consistently reduced peak shear stress and friction angle while raising cohesion, indicating a transition from friction dominated to binder-assisted resistance. Field emission scanning electron microscopy (FESEM) confirmed this mechanism by revealing angular, rough asperities on uncoated NA and smoother, bitumen sheathed surfaces on RAP, which diminish inter-particle interlock but add adhesive bonding. Four easily measured variables such as RAP percentage, complementary NA percentage, seating load and horizontal displacement were used to train artificial neural network (ANN), random forest (RF) and extreme gradient boosting (XGB) models on 80 % of the data while the remaining 20 % was used as an independent test set. All algorithms achieved R² &gt; 0.99 on unseen data, with ANN delivering the lowest error and the narrowest training-testing gap. In conclusion, the study not only clarifies the mechanisms by which RAP alters shear strength but also introduces a combined experimental – computational framework that links FESEM evidence with high accuracy machine learning forecasts based on four basic test parameters, supporting the sustainable incorporation of RAP in performance based earthworks and pavement applications.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"497 ","pages":"Article 143931"},"PeriodicalIF":8.0,"publicationDate":"2025-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145264265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Overcoming phosphorus-induced hydration retardation in sewage sludge ash-cement systems: A comparative study of mechanical and chemical activation 克服污水污泥灰-水泥体系中磷诱导的水化迟缓:机械活化和化学活化的比较研究
IF 8 1区 工程技术
Construction and Building Materials Pub Date : 2025-10-07 DOI: 10.1016/j.conbuildmat.2025.143921
An Guo , Liheng Zhang , Yunqi Zhang , Ting Zhang , Zhenping Sun , Jingbin Yang
{"title":"Overcoming phosphorus-induced hydration retardation in sewage sludge ash-cement systems: A comparative study of mechanical and chemical activation","authors":"An Guo ,&nbsp;Liheng Zhang ,&nbsp;Yunqi Zhang ,&nbsp;Ting Zhang ,&nbsp;Zhenping Sun ,&nbsp;Jingbin Yang","doi":"10.1016/j.conbuildmat.2025.143921","DOIUrl":"10.1016/j.conbuildmat.2025.143921","url":null,"abstract":"<div><div>The utilization of sewage sludge ash (SSA) as a supplementary cementitious material (SCM) offers a significant opportunity for resource recovery; however, its high phosphorus content poses a major challenge by inhibiting cement hydration. This study systematically investigates strategies to mitigate this inhibition in SSA-Ordinary Portland Cement (OPC) systems by comparing the effects of mechanical activation versus chemical activation (using Na<sub>2</sub>SO<sub>4</sub>, CaSO<sub>4</sub>, and Triethanolamine (TEA)) on early-age hydration kinetics and mechanical properties. Results reveal that, contrary to the activation behavior of traditional SCMs, mechanical activation exacerbates phosphorus leaching from SSA, thereby retarding the early hydration process. In contrast, chemical activation can overcome this limitation via targeted regulation of the hydration of different clinker phases. Specifically, 1 % Na<sub>2</sub>SO<sub>4</sub> accelerated early hydration by promoting C<sub>3</sub>S dissolution, increasing the 3-day strength by 127 %, while simultaneously suppressing excessive U-phase formation to maintain late-age strength. 5 % CaSO<sub>4</sub> synergistically accelerated the hydration of both C<sub>3</sub>S and C<sub>3</sub>A, thereby enhancing the formation of C-S-H and AFt, which culminated in compressive strength enhancements of 190 %, 47 %, and 23 % at 3, 7, and 28 days, respectively, relative to the reference mixture. 0.01 % TEA selectively promotes C<sub>3</sub>A hydration while minimizing the inhibitory effect on C<sub>3</sub>S. This research provides effective activation strategies for incorporating phosphorus-rich SSA into cementitious materials, contributing to the development of low-carbon binders and supporting the synergistic goals of waste valorization in zero-waste city initiatives and decarbonization of the construction sector.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"497 ","pages":"Article 143921"},"PeriodicalIF":8.0,"publicationDate":"2025-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145264527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The compressive behavior of PVA fiber reinforced coral aggregate concrete under high-strain rate loading PVA纤维增强珊瑚骨料混凝土在高应变率荷载下的压缩性能
IF 8 1区 工程技术
Construction and Building Materials Pub Date : 2025-10-07 DOI: 10.1016/j.conbuildmat.2025.143843
Yang Cai , Zhi Fang , Ruiqi Guo , Dumin Kuang , Jie He
{"title":"The compressive behavior of PVA fiber reinforced coral aggregate concrete under high-strain rate loading","authors":"Yang Cai ,&nbsp;Zhi Fang ,&nbsp;Ruiqi Guo ,&nbsp;Dumin Kuang ,&nbsp;Jie He","doi":"10.1016/j.conbuildmat.2025.143843","DOIUrl":"10.1016/j.conbuildmat.2025.143843","url":null,"abstract":"<div><div>This study investigated the dynamic mechanical behavior of polyvinyl alcohol (PVA) fiber reinforced coral aggregate concrete (PVA-FRCAC) subjected to impact loads. A 100 mm diameter split Hopkinson pressure bar (SHPB) was used for impact compression tests on PVA-FRCAC specimens with 0 %, 0.5 %, 1 %, 1.5 % and 2 % PVA fiber volume fraction at strain rates ranging from 52 s<sup>−1</sup> to 204 s<sup>−1</sup>, and the dynamic stress-strain curves and damage patterns of PVA-FRCAC were obtained. The effect of PVA fiber volume fraction and loading rate on the dynamic mechanical behavior of PVA-FRCAC was discussed. The results show that the addition of PVA fibers not only increased the dynamic compressive strength of coral aggregate concrete (CAC) but also significantly improves the brittle failure characteristics of CAC under impact loads. The dynamic peak strain (<span><math><msub><mrow><mi>ε</mi></mrow><mrow><mi>d</mi><mi>p</mi></mrow></msub></math></span>) and dynamic ultimate strain (<span><math><msub><mrow><mi>ε</mi></mrow><mrow><mi>d</mi><mi>u</mi></mrow></msub></math></span>) of PVA-FRCAC increases with the increase of PVA fiber content. Moreover, the volume fraction of PVA fibers is positively correlated with dynamic compressive strength and energy absorption. At a strain rate of 122 s<sup>−1</sup>, compared with that of specimen without PVA fiber, the dynamic compressive strength of PVA fiber specimens with a volume fraction of 0.5 %, 1 %, 1.5 % and 2 % increased by 7 %, 13 %, 23 %, and 34 %, respectively; the impact absorption energy of PVA fiber specimens increased by 8 %, 26 %, 41 %, and 51 %, respectively. The dynamic compressive strength of all PVA-FRCAC specimens increases with the increase of the strain rate. Finally, based on ZWT model, a constitutive model for estimating the dynamic stress-strain curves of PVA-FRCAC is proposed.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"497 ","pages":"Article 143843"},"PeriodicalIF":8.0,"publicationDate":"2025-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145264528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mapping provenance and comprehensive characterization of Indian sandstones 印度砂岩填图物源及综合表征
IF 8 1区 工程技术
Construction and Building Materials Pub Date : 2025-10-07 DOI: 10.1016/j.conbuildmat.2025.143891
Narupa Devi Singh , Swathy Manohar , Santanu Banerjee
{"title":"Mapping provenance and comprehensive characterization of Indian sandstones","authors":"Narupa Devi Singh ,&nbsp;Swathy Manohar ,&nbsp;Santanu Banerjee","doi":"10.1016/j.conbuildmat.2025.143891","DOIUrl":"10.1016/j.conbuildmat.2025.143891","url":null,"abstract":"<div><div>This study explores the characterization of Indian sandstones to facilitate their optimal use in construction and conservation. These sandstones vary significantly in physical, mechanical, and durability properties due to geological and environmental factors. This study emphasizes the criticality of understanding these variations for practical applications such as heritage restoration, cladding, masonry, and tiles. This research specifically focuses on nine representative sandstone types: Agra Red, Jodhpur Beige, Kandla White Beige, Teak Wood, Mandana, Dhrangadhra Pink, Jodhpur Brown, Bansipaharpur and Gwalior Mint, collected from active quarries across different regions of India. Comprehensive testing protocols were employed to assess properties such as density, porosity, compressive strength, water absorption and mineralogy via XRD, SEM, EDS and petrography. Results highlight significant variability in the properties of the sandstones, reinforcing the importance of site-specific characterization. While Agra Red and Mandana sandstones displayed low porosity and high compressive strength, indicating suitability for high-stress applications, others, like Dhrangadhra Pink and Teak Wood sandstones, showed higher water permeability, necessitating careful consideration in water-prone environments. Additionally, the research evaluates compliance with various standards for properties such as water absorption and compressive strength, ensuring the usability of these materials within regulated benchmarks. The mineralogical composition of the sandstones was found to have an effect on the materials’ physical and mechanical properties. The characterization of Indian sandstones serves as a foundational resource for engineers, architects, and conservators, contributing to sustainable construction practices and preserving India’s architectural heritage.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"497 ","pages":"Article 143891"},"PeriodicalIF":8.0,"publicationDate":"2025-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145264529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Electromechanical and piezoresistive behaviour of hydraulic lime mortar incorporating carbon microfibers for self-sensing applications 用于自传感应用的含碳微纤维液压石灰砂浆的机电和压阻性能
IF 8 1区 工程技术
Construction and Building Materials Pub Date : 2025-10-07 DOI: 10.1016/j.conbuildmat.2025.143933
Ali Dalalbashi , Virginia Mendizabal , Anastasios Drougkas , Vasilis Sarhosis
{"title":"Electromechanical and piezoresistive behaviour of hydraulic lime mortar incorporating carbon microfibers for self-sensing applications","authors":"Ali Dalalbashi ,&nbsp;Virginia Mendizabal ,&nbsp;Anastasios Drougkas ,&nbsp;Vasilis Sarhosis","doi":"10.1016/j.conbuildmat.2025.143933","DOIUrl":"10.1016/j.conbuildmat.2025.143933","url":null,"abstract":"<div><div>Self-sensing mortars, a type of smart material capable of monitoring structural behaviour under mechanical loading, have recently attracted significant attention. Although most research in this area has focused on cement-based systems, lime-based mortars remain relatively underexplored despite their importance in sustainable construction and heritage preservation. This study investigates the impact of carbon microfibers (CMFs) as a functional filler on the mechanical, electrical, and piezoresistive properties of hydraulic lime-based mortars. Mortar and paste mixes were prepared with different dosages of CMF (0 %, 0.05 %, 0.1 %, and 0.2 % by weight of the binder), both with and without silica fume as a pozzolanic additive. Mechanical tests, including flexural and compressive strength, as well as electrical resistivity measurements and electromechanical (piezoresistivity) evaluations, were performed. The results show that while silica fume enhances compressive strength, it tends to lower flexural strength, likely due to increased brittleness. The addition of CMF exhibited a nonlinear influence on the mechanical properties of the mixes, with strength decreasing up to 0.1 % CMF, followed by a slight increase at 0.2 % CMF. Similarly, the electrical properties (particularly piezoresistivity) also followed a nonlinear trend, showing enhanced sensitivity up to 0.1 % CMF and a reduction beyond that point. These trends suggest the presence of a percolation threshold around 0.1 % CMF The piezoresistive performance, assessed through gauge factor and linearity, also reached its peak at this dosage. The formulation of 0.1 % conductive material mixed with silica fume achieved a gauge factor of 311, which is 34 % higher than the mix containing 0.0 % CMF. This mix also displayed a coefficient of determination (R<sup>2</sup>) of 0.97. In contrast, the mix without silica fume attained a gauge factor of 339, representing a 79 % increase compared to the mix with 0.0 % CMF, with an R<sup>2</sup> of 0.94. These results confirm that the sensing response was stable and highly reliable. Overall, 0.1 % CMF was identified as the optimal amount for improving the self-sensing behaviour of lime-based mortars. These findings confirm that CMF can effectively enhance the electromechanical response of traditional lime matrices without compromising their structural performance or their suitability for heritage materials.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"497 ","pages":"Article 143933"},"PeriodicalIF":8.0,"publicationDate":"2025-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145264413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Experimental study on shear behavior of GFRP bars and high-strength thermal insulation mortar strengthened brick masonry walls GFRP筋与高强保温砂浆加筋砖砌体墙体抗剪性能试验研究
IF 8 1区 工程技术
Construction and Building Materials Pub Date : 2025-10-07 DOI: 10.1016/j.conbuildmat.2025.143835
Shengwei Liu , Kuangmin Zheng , Pao Huang , Jiawei Zhang , Cheng Yang , Li an Wang
{"title":"Experimental study on shear behavior of GFRP bars and high-strength thermal insulation mortar strengthened brick masonry walls","authors":"Shengwei Liu ,&nbsp;Kuangmin Zheng ,&nbsp;Pao Huang ,&nbsp;Jiawei Zhang ,&nbsp;Cheng Yang ,&nbsp;Li an Wang","doi":"10.1016/j.conbuildmat.2025.143835","DOIUrl":"10.1016/j.conbuildmat.2025.143835","url":null,"abstract":"<div><div>The shear behavior of brick masonry walls reinforced with Glass Fiber Reinforced Plastic bars and high-strength thermal insulation mortar (GHM) is crucial to determining whether this technique can be applied to integrated thermal insulation and strengthening retrofit projects of masonry structures. Through diagonal compression test, this study investigated the shear behavior of GHM reinforced brick masonry walls, specifically analyzing the effects of masonry mortar strength, volume volume replacement percentage of insulation materials, glass fiber reinforced plastic (GFRP) bar diameter, and GHM-strengthened layer thickness on the shear strength enhancement. Research results indicate that GHM-strengthened brick masonry walls show improved integrity and ductility compared to unreinforced masonry (URM) wall. The bearing capacity, shear strength, and post-cracking displacement of the strengthened specimens were significantly enhanced. Additionally, the load-displacement curves of the strengthened specimens exhibited improved post-peak behavior. After GHM strengthening, the peak load and its corresponding displacement of the specimens increased by 14.02 times and 4.09 times, respectively. The shear strength, ductility factors and energy dissipations increased by 2.42–7.62 times, 2.14–4.68 times, and 21.47–29.10 times, respectively. Based on the analysis of experimental results, a modification factor for shear capacity was introduced into the existing shear capacity prediction model of strengthened brick masonry walls. The modified model exhibited good agreement with the experimental values.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"497 ","pages":"Article 143835"},"PeriodicalIF":8.0,"publicationDate":"2025-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145264535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Interfacial tensile strength of arch dam transverse joints with casting intervals, concrete ages, and curing temperatures 拱坝横向缝界面抗拉强度随浇筑间隔、混凝土龄期、养护温度的变化
IF 8 1区 工程技术
Construction and Building Materials Pub Date : 2025-10-07 DOI: 10.1016/j.conbuildmat.2025.143925
Haoxin Li, Yu Hu, Fengqiang Zhang, Rui Ma, Zhaolin Liu, Qingbin Li
{"title":"Interfacial tensile strength of arch dam transverse joints with casting intervals, concrete ages, and curing temperatures","authors":"Haoxin Li,&nbsp;Yu Hu,&nbsp;Fengqiang Zhang,&nbsp;Rui Ma,&nbsp;Zhaolin Liu,&nbsp;Qingbin Li","doi":"10.1016/j.conbuildmat.2025.143925","DOIUrl":"10.1016/j.conbuildmat.2025.143925","url":null,"abstract":"<div><div>In arch dam engineering, transverse joint apertures often fail to meet grouting requirements due to limited understanding and consideration of joint interfacial tensile strength. Before opening, the transverse joint is essentially the interface between new and old concrete. This study experimentally investigated the effects of four key factors—curing temperature of the old concrete, casting interval, age of the new concrete, and curing temperature of the composite specimen—on the interfacial splitting and direct tensile strengths of new-to-old low-heat Portland cement concrete (LHPC-C) composite specimens using an orthogonal design, followed by analysis of variance (ANOVA). The results show that the curing temperature of the composite specimen and the age of the new concrete have highly significant influence (P &lt; 0.001), whereas the casting interval and the curing temperature of the old concrete have no significant influence. Maturity-based predictive models for estimating the development of interfacial splitting and direct tensile strengths were developed with coefficients of determination (R²) of 0.96 for both, and validated, achieving mean absolute percentage errors (MAPEs) of 4.15 % for splitting tensile strength and 1.02 % for direct tensile strength. To assess engineering applicability, the models were applied to predict interfacial splitting tensile strength under time-varying curing temperature histories and the opening temperatures of transverse joints in a certain arch dam, with relative errors below 5 % and 7 %, respectively. These results demonstrate that the proposed models accurately describe interfacial tensile strength development in response to variations in key influencing factors, and are applicable to engineering practice.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"497 ","pages":"Article 143925"},"PeriodicalIF":8.0,"publicationDate":"2025-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145264537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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