Construction and Building Materials最新文献_第6页

Effects of using biochar materials obtained from cherry and sour cherry wastes on bitumen modification

IF 7.4 1区工程技术

Construction and Building Materials Pub Date : 2025-02-28 DOI: 10.1016/j.conbuildmat.2025.140609

Mahyar Yegane , Burak Yiğit Katanalp , Perviz Ahmedzade

{"title":"Effects of using biochar materials obtained from cherry and sour cherry wastes on bitumen modification","authors":"Mahyar Yegane , Burak Yiğit Katanalp , Perviz Ahmedzade","doi":"10.1016/j.conbuildmat.2025.140609","DOIUrl":"10.1016/j.conbuildmat.2025.140609","url":null,"abstract":"<div><div>This study explores the incorporation of cherry and sour cherry-based biochar into bitumen regarding the chemical, microstructural and rheological properties. Biochar was produced from industrial cherry waste (CW) and sour cherry waste (SCW) via slow pyrolysis and introduced to bitumen with 13 %, 15 %, 17 % by weight. Microstructural analysis using SEM indicated a porous, rough surface morphology, with SCW-based biochar displaying a finer particle size than CW-based biochar. Conventional tests showed that biochar addition increased bitumen stiffness in proportion to the biochar ratio. Incorporation of CW and SCW to bitumen resulted with viscosity increase (maximum 2.40 and 2.59 times, respectively) and less sensitivity to temperature variations. Increased penetration index (PI) values from −3.23 to −2.45 suggested a transition from sol to sol-gel behavior. Oscillation tests demonstrated enhanced rutting resistance (1.94- and 1.83-times greater complex modulus, G* at 64ºC for unaged CW and SCW incorporated blends). However, modified blends showed higher susceptibility to elasticity loss following aging. Creep-recovery analysis revealed improved shear resistance with 2.19- and 1.99-times reduced Jnr at 64ºC under 3.2 kPa stress, while approximately 1.15 and 1.06 times decreased elastic recovery (R%) for CW and SCW incorporated blends, respectively. Fatigue properties were enhanced, with higher A and lower B parameters yielding increased number of cycles to failure (Nf), particularly for 1.35 and 1.26 times for CW-and SCW-modified asphalt binders FTIR analysis revealed diminished CH₃ and CH₂ vibrations, along with a decreased presence of hydroxyl groups after pyrolysis.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"470 ","pages":"Article 140609"},"PeriodicalIF":7.4,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143520353","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

Novel chloride binding-based quantitative method for estimating the degree of geopolymerization in metakaolin geopolymer

IF 7.4 1区工程技术

Construction and Building Materials Pub Date : 2025-02-28 DOI: 10.1016/j.conbuildmat.2025.140528

Qiang Mao , Xi Luo , Zhongming Jiang , Bai Zhang , Hui Peng , Xudong Deng

{"title":"Novel chloride binding-based quantitative method for estimating the degree of geopolymerization in metakaolin geopolymer","authors":"Qiang Mao , Xi Luo , Zhongming Jiang , Bai Zhang , Hui Peng , Xudong Deng","doi":"10.1016/j.conbuildmat.2025.140528","DOIUrl":"10.1016/j.conbuildmat.2025.140528","url":null,"abstract":"<div><div>Geopolymer concrete is a potential partial substitute for Portland cement (PC) concrete in civil engineering. Understanding chloride-binding behavior and mechanisms in geopolymers is essential for evaluating durability of geopolymer concrete in chloride-rich environments. This study investigated the chloride-binding behavior of metakaolin (MK) geopolymers by examining the influence of chloride ion concentrations, alkali activator concentrations, and pore solution pH levels on their chloride-binding capacities. The correlation between the bound chloride ion content and the geopolymerization degree of MK was analyzed. The experimental results indicated that the binding of MK geopolymer to chloride ions is physical adsorption under the competition of hydroxide ions. Thus when the pH of pore solution decreases from 11.69 to 10.55, the amount of bound chloride increases by 1.95 times. The chloride-binding capacity of the MK geopolymer was primarily determined by the N-A-S-H gel content and the pH of pore solution. Under the same pH levels and chloride ion concentration, the chloride ion content bound per unit N-A-S-H gel remained constant, independent of N-A-S-H gel content. Based on these findings, a new method was proposed to evaluate the geopolymerization degree of MK by mearsuring the chloride-binding capacity of the N-A-S-H gel. The proposed method shows a small margin of error (<5 %) compared to selective acid dissolution analysis, providing valuable insights for research into geopolymer precursor reactions.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"470 ","pages":"Article 140528"},"PeriodicalIF":7.4,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143520350","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

Study on the arch expansion characteristics of cement-stabilized macadam under the action of temperature and salt

IF 7.4 1区工程技术

Construction and Building Materials Pub Date : 2025-02-28 DOI: 10.1016/j.conbuildmat.2025.140587

Weixing Bao , Lei Tian , Huizhou Li , Zhiming Huang , Yan Yin , Zhiyong Zhang

{"title":"Study on the arch expansion characteristics of cement-stabilized macadam under the action of temperature and salt","authors":"Weixing Bao , Lei Tian , Huizhou Li , Zhiming Huang , Yan Yin , Zhiyong Zhang","doi":"10.1016/j.conbuildmat.2025.140587","DOIUrl":"10.1016/j.conbuildmat.2025.140587","url":null,"abstract":"<div><div>Environmental conditions, including temperature variations and salt erosion in desert areas, significantly affect the strength and arch expansion properties of cement-stabilized macadam materials. To reveal the effects of temperature, salt content, and cement dosage on the arch expansion deformation of cement-stabilized macadam, this study analyzes the strength performance, arch expansion characteristics, microscopic morphology, and pore structure characteristics of cement-stabilized macadam materials under different factors through strength tests, arch expansion tests, SEM, and CT techniques. The results show that the strength of cement-stabilized macadam increases with curing temperature and cement dosage, but decreases with salt content, exhibiting a significant abrupt change in both cases. During the heating process, the expansion coefficient first decreases, then increases, and decreases again, reaching its maximum value between 40–50°C. An arch expansion strain model is developed considering sulfate content, cement dosage, and temperature variations. The effect of cement dosage on the arch expansion failure of cement-stabilized macadam is greater than that of sulfate content. It is recommended to reduce the cement dosage while maintaining the mixture's strength. The arch expansion failure of cement-stabilized macadam under temperature and salt action can be divided into four stages, which are essentially the continuous increase of material porosity and pore quantity under stress accumulation.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"470 ","pages":"Article 140587"},"PeriodicalIF":7.4,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143511571","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

Full-scale monitoring of cold mix asphalt during curing

IF 7.4 1区工程技术

Construction and Building Materials Pub Date : 2025-02-28 DOI: 10.1016/j.conbuildmat.2025.140529

Amélie Thiriet , Juliette Blanc , Mai-Lan Nguyen , Stéphane Trichet , Jean-Luc Geffard , Patrice Diez , Frédéric Delfosse , Vincent Gaudefroy

{"title":"Full-scale monitoring of cold mix asphalt during curing","authors":"Amélie Thiriet , Juliette Blanc , Mai-Lan Nguyen , Stéphane Trichet , Jean-Luc Geffard , Patrice Diez , Frédéric Delfosse , Vincent Gaudefroy","doi":"10.1016/j.conbuildmat.2025.140529","DOIUrl":"10.1016/j.conbuildmat.2025.140529","url":null,"abstract":"<div><div>Cold mix asphalts (CMA) could be an answer to the need to use road materials with a lower carbon footprint. They are implemented at room temperature without drying aggregates, allowing significant energy savings for the pavement industry. However, their behavior in road pavements is still little known. This paper investigates the structural evolution and damaging of monitored test sections containing CMAs and their link to mix and binder variations with time. The behavior of the pavement was assessed in regards to the mix composition, surface layer, number of loading cycles using accelerated pavement testing and weather conditions. Full-scale experimentations showed that structures containing CMAs as base course have a very distinctive behavior in response to loading. Firstly, they undergo high strain amplitudes, compared to structures containing hot mix asphalts (HMAs), and these amplitudes increase with the number of loading cycles without apparent structural damage. It was also demonstrated that a HMA surface layer shields the CMA course. Full-scale and in-lab tests demonstrated that CMA curing (after 36 months) is not influenced by a surface layer and that the performances of CMAs can be reduced by a lower binder content. Moreover an overloaded section displayed only transverse cracking. Permanent deformation was visible on this sacrificial section, from the CMA surface to the unbound granular material course. Generally, this work also gives more insight on structural behavior of pavements containing CMAs under loading. The testing procedures and equipment suitable for structures with HMAs are not always adapted to structures with CMAs.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"470 ","pages":"Article 140529"},"PeriodicalIF":7.4,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143511575","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

Rheological and mechanical properties of 3D printable magnesium oxysulfate cements

IF 7.4 1区工程技术

Construction and Building Materials Pub Date : 2025-02-28 DOI: 10.1016/j.conbuildmat.2025.140618

Qiyan Li , Xiaodong Wen , Xiaojian Gao

{"title":"Rheological and mechanical properties of 3D printable magnesium oxysulfate cements","authors":"Qiyan Li , Xiaodong Wen , Xiaojian Gao","doi":"10.1016/j.conbuildmat.2025.140618","DOIUrl":"10.1016/j.conbuildmat.2025.140618","url":null,"abstract":"<div><div>Magnesium oxysulfate cement (MOS) offers a promising alternative to 3D-printed Portland cement due to its rapid hardening and high strength. The layer-to-layer interfacial bonding of the 3D printed specimen is closely related to the rheological performance of fresh mixtures. This paper investigates the influence of rheological properties on the printability and mechanical performance of 3D printable magnesium oxysulfate cement (3DP-MOS) paste. The results show that an increase in the magnesium-to-sulfur ratio reduces fluidity and lowers the minimum water content of MOS mortar, enhancing packing density, accelerating early hydration, and improving printability, extrusion stability and structural integrity. MOS mortar with a molar ratio (MgO: MgSO<sub>4</sub>·7H<sub>2</sub>O: H<sub>2</sub>O) of 15:1:12 or 21:1:15 demonstrates optimal flow performance and setting time. Dynamic yield stress values ranging from 587.9 to 888.7 Pa and a consistency factor of 2.0–36.8 in 3DP-MOS mortar ensure stable extrusion width and stacking height, closely aligning with the intended design and ensuring both precision and structural integrity in 3D-printed structures. Additionally, higher dynamic yield stress and a lower consistency factor promote uniform deposition and a denser microstructure in 3D-printed MOS materials, enhancing mechanical properties.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"470 ","pages":"Article 140618"},"PeriodicalIF":7.4,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143521272","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

Exploring aspartic acid as a chelator to regulate the performance of alkali-activated slag

IF 7.4 1区工程技术

Construction and Building Materials Pub Date : 2025-02-28 DOI: 10.1016/j.conbuildmat.2025.140577

Qingru Xu , Zeren Chen , Wenkai Cao , Shuang Wang , Yingyu Wang , Shangkun Li , Liping Wang , Peiyuan Chen

{"title":"Exploring aspartic acid as a chelator to regulate the performance of alkali-activated slag","authors":"Qingru Xu , Zeren Chen , Wenkai Cao , Shuang Wang , Yingyu Wang , Shangkun Li , Liping Wang , Peiyuan Chen","doi":"10.1016/j.conbuildmat.2025.140577","DOIUrl":"10.1016/j.conbuildmat.2025.140577","url":null,"abstract":"<div><div>This study proposes to utilize L-aspartic acid (L-Asp) as a Ca<sup>2 +</sup> chelator to regulate the performance of alkali-activated slag (AAS). The experimental results revealed that L-Asp can effectively retard the hydration of AAS through Ca<sup>2+</sup> chelation, thereby prolonging the setting time and enhancing the fluidity of AAS. Moreover, the presence of L-Asp∼Ca chelates has a nucleation effect, which can improve the hydration of AAS at later stages. Consequently, the pore structure of AAS was optimized and the compressive strength was enhanced. More importantly, the autogenous shrinkage was effectively reduced. The mixture with 0.3 % L-Asp exhibited the highest compressive strength, the largest elastic modulus of hydration products, and the greatest cumulative heat of hydration within 72 h, it enhanced the fluidity and reduced the autogenous shrinkage of AAS. Consequently, 0.3 % L-Asp was the optimal mixture based on a systematic comparison of key performance indicators of AAS. Specifically, the addition of 0.3 % L-Asp extended the setting time of AAS by 45.5 %, improved the 28d compressive strength by 6.7 %, and decreased the autogenous shrinkage by 29.7 %.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"470 ","pages":"Article 140577"},"PeriodicalIF":7.4,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143511578","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

Diagonal shear behaviour of limestone masonry walls strengthened with jute-TRM composite systems

IF 7.4 1区工程技术

Construction and Building Materials Pub Date : 2025-02-28 DOI: 10.1016/j.conbuildmat.2025.140572

Alba Hyseni , Carmelo Caggegi , Nadege Reboul , Francesco Micelli

{"title":"Diagonal shear behaviour of limestone masonry walls strengthened with jute-TRM composite systems","authors":"Alba Hyseni , Carmelo Caggegi , Nadege Reboul , Francesco Micelli","doi":"10.1016/j.conbuildmat.2025.140572","DOIUrl":"10.1016/j.conbuildmat.2025.140572","url":null,"abstract":"<div><div>Ancient masonry buildings constitute a valuable historical and architectural heritage. Nevertheless, the vulnerability of masonry to structural and environmental actions necessitates the assessment of innovative solutions for strengthening and retrofitting, aimed at their conservation. The building materials industry is progressively intrigued by innovative and sustainable solutions, due to a rising environmental consciousness. Composite systems such as <em>Textile Reinforced Mortar</em> (TRM) incorporating natural fibers as reinforcement into an inorganic matrix, represent a possible innovative alternative to traditional composites made with industrial/synthetic fibers, to minimize the environmental impact and carbon footprint in civil engineering. Nevertheless, several unresolved matters regarding the accurate mechanical behaviour of these innovative systems remain. Multiple studies have been carried out to evaluate the bond properties between the fibers and mortar, as well as the tensile behaviour of TRMs that use natural textiles such as jute. However, there is still a lacking knowledge involving experimental tests concerning the effectiveness of TRM materials when applied to structural elements such as masonry walls. This paper provides the results of an experimental study on the diagonal compression shear capacity of limestone walls strengthened with jute TRMs, by varying the amounts of the textile reinforcement. The use of Digital Image Correlation (DIC) had permitted to deeply analyse the failure mechanisms related to each test. The outcomes revealed a good increase in terms of load carrying capacity of the walls, while the strain capacity remained very low, confirming a brittle failure mode in all cases. The results provided in this study are assumed to be strongly helpful in understanding the mechanical behaviour of such systems and calibrating future research.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"470 ","pages":"Article 140572"},"PeriodicalIF":7.4,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143511788","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

Influence of sisal fibers on mechanical properties and thermal conductivity of fully recycled aggregate concrete

IF 7.4 1区工程技术

Construction and Building Materials Pub Date : 2025-02-28 DOI: 10.1016/j.conbuildmat.2025.140478

Shaoxiong Lyu , Jianzhuang Xiao , Bo Wang , Yue Lu , Xiuqi Sun

{"title":"Influence of sisal fibers on mechanical properties and thermal conductivity of fully recycled aggregate concrete","authors":"Shaoxiong Lyu , Jianzhuang Xiao , Bo Wang , Yue Lu , Xiuqi Sun","doi":"10.1016/j.conbuildmat.2025.140478","DOIUrl":"10.1016/j.conbuildmat.2025.140478","url":null,"abstract":"<div><div>To reduce greenhouse gas emission and utilize construction solid waste, fully recycled aggregate concrete (FRAC) with plant fiber was proposed and investigated in this study. The effects of sisal fiber contents (0 %, 0.5 %, 1 %, and 2 %) and fiber lengths (5 mm, 10 mm, and 20 mm) on the mechanical properties and thermal conductivity of FRAC were intensively tested. The compressive strength, splitting tensile strength, axial tensile strength, flexural strength, thermal conductivity and porosity of concrete specimens were analyzed. The results show that with the increase of fiber contents, the mechanical strength of FRAC first increased and then decreased. The splitting tensile strength and flexural strength of FRAC have been enhanced by 33.00–37.54 % and 4.31–24.43 %, respectively. The lowest thermal conductivity of FRAC occurred at the fiber content of 0.5 %. With the variation of the fiber length, the maximum mechanical strength, flexural toughness and thermal conductivity of FRAC appeared at the length of 10 mm. The incorporation of sisal fibers at a volume fraction of 2 % or with a length of 20 mm led to a noticeable increase in porosity, both by more than 45 %. Compared to conventional concrete, FRAC has a 16.34 % reduction in carbon emission when the sisal fiber content is 2 %. Through the analysis of carbon intensity ratio, the optimal fiber content is 1 % and fiber length is 10 mm. This study shows that FRAC mixed with proper amount of sisal fibers has better mechanical properties, thermal insulation performance and lower carbon emission.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"470 ","pages":"Article 140478"},"PeriodicalIF":7.4,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143520355","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

Study on snow melting performance evaluation and optimization design of conductive rubber electric heating pavement

IF 7.4 1区工程技术

Construction and Building Materials Pub Date : 2025-02-28 DOI: 10.1016/j.conbuildmat.2025.140556

Zipeng Ma, Haibin Wei, Dongsheng Wei, Boyu Jiang, Xiaofan Wang

{"title":"Study on snow melting performance evaluation and optimization design of conductive rubber electric heating pavement","authors":"Zipeng Ma, Haibin Wei, Dongsheng Wei, Boyu Jiang, Xiaofan Wang","doi":"10.1016/j.conbuildmat.2025.140556","DOIUrl":"10.1016/j.conbuildmat.2025.140556","url":null,"abstract":"<div><div>Conductive rubber electric heating technology is an innovative deicing technology, which provides a safe and environmentally friendly long-term solution. In the process of snow melting, the wavy temperature distribution generated by the conductive rubber heating system leads to discontinuous snow melting, which makes the existing snow melting performance indicators insufficient to accurately evaluate its performance. Therefore, this study introduced two new snow melting performance indicators (temperature non-uniformity coefficient, C<sub>T</sub> and temperature range, R<sub>T</sub>), and proposed a multi-dimensional comprehensive quantitative evaluation method for road snowmelt performance. Firstly, a two-dimensional finite element snow melting model of bridge deck pavement structure with conductive rubber heating system (BDPS-CRHS) was established and verified by outdoor snow melting test. The effects of design parameters such as laying width, laying spacing, buried depth and input power on snow melting performance indicators were analyzed by thermal simulation. Subsequently, the prediction models of snow melting performance indicators were established using response surface method. A new comprehensive evaluation indicator (snow melting performance coefficient, SMPC) was proposed and its calculation method was provided. Finally, the SMPC was used as the fitness function, and the design parameters of conductive rubber snow-melting bridge deck were optimized by the I-PSO algorithm. The results showed that the optimal design scheme was conductive rubber width of 0.55 m, laying spacing of 0.15 m, buried depth of 0.05 m, input power of 587 W/m<sup>2</sup>. This study provides a scientific basis for the quantitative evaluation and design parameters optimization of snow melting performance of electric heating pavement, and ensures the efficiency and reliability of snow melting effect.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"470 ","pages":"Article 140556"},"PeriodicalIF":7.4,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143520361","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

Synergistic effect of expansive agent and steel fiber on interfacial performance and axial compression behavior of UHPC-filled steel tube columns

IF 7.4 1区工程技术

Construction and Building Materials Pub Date : 2025-02-28 DOI: 10.1016/j.conbuildmat.2025.140543

Mohammed A.A.M. Abbas , Xinyi Ran , Adel A. Musleh , Peipeng Li

{"title":"Synergistic effect of expansive agent and steel fiber on interfacial performance and axial compression behavior of UHPC-filled steel tube columns","authors":"Mohammed A.A.M. Abbas , Xinyi Ran , Adel A. Musleh , Peipeng Li","doi":"10.1016/j.conbuildmat.2025.140543","DOIUrl":"10.1016/j.conbuildmat.2025.140543","url":null,"abstract":"<div><div>This research investigates the interfacial bonding performance and axial compression behavior of ultra-high performance concrete (UHPC)-filled steel tube (UHPCFST) columns. The synergistic effect of varying dosages of expansive agent (EA) and steel fibers (SF) on bond strength and bearing capacity were explored through push-out and axial compression tests. The mechanical strength, autogenous shrinkage, microstructure and hydration at UHPC material level were tested, and failure modes, the load-slip, load-displacement and strain curves of UHPCFST were measured. Results indicate that the inclusion of EA and SF significantly reduced shrinkage and enhanced bond strength between UHPC and steel tubes. Specimens with higher EA and SF contents showed improved interfacial bonding, with sustained strength even after initial bond failure. At 15 % EA, shrinkage transitioned into expansion, greatly enhancing bond strength. The combined influence of EA and SF resulted in optimal outcomes when their contents were 15 % and 2 %, respectively. At these levels, the UHPC and UHPCFST short columns exhibited the most significant improvements in shrinkage and bond strength, as well as the compressive strength and ultimate bearing capacity.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"470 ","pages":"Article 140543"},"PeriodicalIF":7.4,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143521267","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