Construction and Building Materials最新文献

{"title":"Experimental study on bond performance between corroded reinforcement and basalt-polypropylene fiber reinforced concrete after high temperature","authors":"Yanchun Liu ,&nbsp;Bensheng Chen ,&nbsp;Xinyu Liu ,&nbsp;Caiwei Liu ,&nbsp;Jijun Miao ,&nbsp;Chengliang Weng ,&nbsp;Yichun Luo","doi":"10.1016/j.conbuildmat.2025.140944","DOIUrl":"10.1016/j.conbuildmat.2025.140944","url":null,"abstract":"<div><div>High temperature damage and corrosion erosion degrade bond performance between steel reinforcement and concrete, subsequently affecting structural load-bearing capacity. Given that fiber reinforced concrete (FRC) exhibits superior mechanical properties and durability, this study experimentally evaluates the bond performance between corroded steel and basalt-polypropylene fiber (BF-PF) reinforced concrete after high-temperature exposure. Eccentrically loaded specimens with varying corrosion levels (0 %, 2 %, 5 %, and 10 %) were prepared for pull-out tests after exposure to high temperatures (20°C, 200°C, 400°C, 600°C, and 800°C). The results indicated that the incorporation of 0.1 % BF and PF improved the mechanical and bond properties of concrete, with a positive synergistic effect observed when the two types of fibers are combined. At temperatures of 200°C, 400°C, and 600°C, the average bonding strength of fiber-reinforced concrete (FRC) increased by 17.84 %, 12.68 %, and 15.93 %, respectively, with BPFRC exhibiting higher residual bonding strength at 400°C. However, As the level of damage increased, the contribution of fibers gradually diminished. At 800°C and a corrosion rate of 6.76 %, the bond strength of BPFRC increased by only 3.88 %, while that of PFRC decreased by 1.81 %. Additionally, fiber bridging effectively inhibits crack development and distributes the load, thereby positively impacting bonding stiffness and energy dissipation. A bond strength prediction model and constitutive relationship for the combined effects of corrosion and high temperature were proposed. The applicability of the model was further validated by predicting the flexural load capacity of reinforced concrete beams, considering bond slip after damage. This research provides data that support the performance evaluation of BF-PF reinforced concrete.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"474 ","pages":"Article 140944"},"PeriodicalIF":7.4,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143746295","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}

{"title":"Study on the long-term mechanical property evolution law and microscopic mechanism of bamboo fiber reinforced sea sand reactive powder concrete","authors":"Lincai Ge ,&nbsp;Haitao Li ,&nbsp;Zixian Feng ,&nbsp;Mahdi Hosseini","doi":"10.1016/j.conbuildmat.2025.141100","DOIUrl":"10.1016/j.conbuildmat.2025.141100","url":null,"abstract":"<div><div>In order to reveal the evolution of the long-term mechanical properties of bamboo fiber (BF) reinforced sea sand reactive powder concrete (SRPC), the micro morphology, chemical composition and pore structure of BF-SRPC were investigated by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), Fourier transform infrared spectroscopy (FTIR) and computed tomography (CT). The results showed that the incorporation of BF effectively optimized the pore distribution and reduced the number and volume of pores. When the optimum content was 0.75 %, the compressive strength of BF-SRPC increased by 4.17 %, 11.61 %, 12.50 % and 15.23 %, and the splitting tensile strength increased by 2.41 %, 30.68 %, 25.98 %, and 26.81 % at the ages of 7, 28, 90, and 180 days, compared with that of the plain SRPC, respectively. At 180 days, the interfacial transition zone between BF and SRPC was tightly bonded, and the mineralization damage of BF was significantly reduced. The microfibril structure was intact, and the stretching vibration peak of cellulose C-O-C and lignin C<img>C had no significant change compared with 90 days.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"474 ","pages":"Article 141100"},"PeriodicalIF":7.4,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143759129","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}

{"title":"Impact response of self-compacting concrete incorporating asphalt emulsion and fiber","authors":"Hussaini Abdullahi Umar ,&nbsp;Xiaohui Zeng ,&nbsp;Xiang Hu ,&nbsp;Mustapha Jamaa Garba ,&nbsp;Guangcheng Long ,&nbsp;Caijun Shi","doi":"10.1016/j.conbuildmat.2025.141036","DOIUrl":"10.1016/j.conbuildmat.2025.141036","url":null,"abstract":"<div><div>Due to its excellent workability, self-compacting concrete (SCC) has been increasingly utilized in various concrete structures, including transportation infrastructures like highways, tunnels, slab tracks of high-speed rail, and bridges. However, the frequent and occasional impact loads significantly threaten the serviceability of concrete structures. This work evaluates the dynamic mechanical performance of SCC prepared with asphalt emulsion (AE), polypropylene fiber (PPF), and basalt fiber (BF) using the split Hopkinson pressure bar (SHPB) test. To further understand the combined impacts of AE and fiber on SCC, damping capacity was also experimentally evaluated. Results demonstrate that the dynamic increase factor (<em>DIF</em>) rises with the decimal logarithm of strain rate, demonstrating an excellent strain rate effect, and SCC with AE and fiber achieved a 20 – 60 % increase in <em>DIF</em>. The impact toughness index was greatly enhanced, with an enhancement of 10.8 % achieved by adding AE alone. When AE was combined with PPF and BF, the improvements were 10.2 % and 11.6 %, respectively, representing a significant increase in the impact resistance. Specimens containing AE and fibers also demonstrated an enhanced damping ratio and loss factor; AE alone increased the damping ratio by about 21 %, while the incorporation of AE together with PPF, BF, and the hybrid fiber enhanced the damping ratio by 8 %, 13 %, and 16 %, respectively; the loss factor increase within the range of 8 – 21 %, indicating an excellent improvement in energy absorption and vibration reduction performance of SCC. Besides, the SCC matrix was refined by the synergistic network structure created by AE, fibers, and cement hydrates, providing excellent bridging and toughening effects; consequently, the overall impact resistance, damping capacity, and vibration reduction performance of SCC were successfully optimized.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"474 ","pages":"Article 141036"},"PeriodicalIF":7.4,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143746360","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}

{"title":"In-fire material properties of wire-arc additively manufactured 3D-printed structural aluminum alloys","authors":"Yao Sun","doi":"10.1016/j.conbuildmat.2025.140946","DOIUrl":"10.1016/j.conbuildmat.2025.140946","url":null,"abstract":"<div><div>Additive manufacturing, often known as 3D printing, is being increasingly used in the construction sector. This paper reports an experimental investigation on the in-fire material properties of 3D-printed structural aluminum alloys at elevated temperatures. The testing program mainly encompasses 30 in-fire material tests and 6 ambient-temperature material tests on grade 6063 aluminum alloy, which was 3D-printed by means of wire-arc additive manufacturing. Two material thicknesses including 3 mm and 5 mm, and three printing orientations including 0°, 45° and 90°, were considered in the testing program. Six different temperature levels varying from 20 °C to 500 °C were adopted in the material testing, to derive the corresponding material stress–strain responses and key material property retention factors. The retention factors were adopted to analyze the thermal effect on the residual strength and stiffness of wire-arc additively manufactured aluminum alloys at elevated temperatures. The retention factors given in the aluminum fire-design standards in Europe and America were also assessed based on the test data, with design inaccuracy revealed. To overcome this limitation, retention factor predictive models were proposed to accurately predict the in-fire properties of wire-arc additively manufactured aluminum alloys. Then, a new Ramberg–Osgood material constitutive model was proposed, demonstrating a high level of accuracy in predicting the stress–strain behavior of wire-arc additively manufactured aluminum alloys at elevated temperatures.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"474 ","pages":"Article 140946"},"PeriodicalIF":7.4,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143746929","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}

{"title":"Improving expansion and mechanical properties of sustainable high-strength lightweight concrete incorporating cold-bonded lightweight core-shell aggregates","authors":"Qiao Liao ,&nbsp;Shen-Yi Lu ,&nbsp;Chun-Peng Zhang ,&nbsp;Jian-Xin Lu ,&nbsp;Bi-Xiong Li ,&nbsp;Zhen-Hua Duan ,&nbsp;Chao-Ming Pang ,&nbsp;Chi Sun Poon","doi":"10.1016/j.conbuildmat.2025.141095","DOIUrl":"10.1016/j.conbuildmat.2025.141095","url":null,"abstract":"<div><div>This research developed sustainable high-strength lightweight concrete (HS-LWC) with low-shrinkage characteristics by combining cold-bonded lightweight core-shell aggregates and expansion agent for concrete-filled steel tubes (CFSTs) and modular integrated construction (MiC) applications. The autogenous shrinkage of HS-LWC with diverse expansion agent contents (0–8%) was investigated, and its internal relative humidity was monitored. The expansive deformation of CFSTs filled with HS-LWC was explored. The mechanical properties and micro characteristics of HS-LWC were investigated. Moreover, a pilot-scale experiment was implemented in MiC factory to verify the reliability of HS-LWC in large-scale production. The potential energy savings of high-rise HS-LWC MiC buildings were analyzed by EnergyPlus software. The results demonstrated that with the increment of expansion agent content, the mechanical strength of HS-LWC increased significantly and then decreased due to the evolution of pore structures. The HS-LWC incorporating expansion agent exhibited higher mechanical strength than normal concrete, resulting from high-strength lightweight aggregates (LWAs), dense pore structures in mortar and good interfacial transition zone between LWAs and matrix. The circumferential expansion for CFSTs at an early age was beneficial for preventing the debonding between steel tubes and HS-LWC. The early micro-expansion behaviors of HS-LWC were mainly due to the synergistic effects of expansion agent and internal curing from LWAs. A content of 4% was recommended to acquire low-shrinkage HS-LWC with high compressive strength (&gt; 70 MPa) and low density (∼1800 kg/m³). Furthermore, a mock-up concrete module demonstrated that the developed HS-LWC could be successfully adopted in constructing structures in MiC applications. The energy conservation of high-rise HS-LWC MiC buildings was obvious, saving 2–51% in cooling energy consumption and 26–55% in heating energy consumption.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"474 ","pages":"Article 141095"},"PeriodicalIF":7.4,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143746981","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}

{"title":"Evaluation of orientation factors influencing the shear and flexural behavior of elements in steel fiber reinforced concrete","authors":"Bruno Leporace-Guimil ,&nbsp;Antonio Conforti ,&nbsp;Giovanni A. Plizzari","doi":"10.1016/j.conbuildmat.2025.141054","DOIUrl":"10.1016/j.conbuildmat.2025.141054","url":null,"abstract":"<div><div>The structural design of Fiber Reinforced Concrete (FRC) elements should take into consideration fiber orientation since the residual properties of FRC strongly depend on the inclination between fibers and the crack plane. Designers must be aware of the possible negative influence of fiber orientation, but they may also take advantage of its positive effect. Current standards, such as the <em>fib</em> Model Code 2010, the German Committee for Structural Concrete DAfStb, and Annex L of the new Eurocode 2, introduce an orientation factor that should transform the mechanical properties determined from standard beams (EN 14651, ASTM 1609) into mechanical properties representative of the real structure. Unfortunately, there is still a lack of studies for a proper determination of the orientation factors for different structural elements. In this context, the present paper reports the results of an experimental program aimed at evaluating the influence of fiber orientation on the shear and flexural behavior of beams in steel fiber reinforced concrete (SFRC). Nine full-scale beams (410 cm long, 70 cm high and 15 cm wide) were cast using vibrated and self-compacting concrete, following the most common casting procedure adopted in practice. Thirty-six small specimens were extracted and tested from three full-scale beams to evaluate the local residual properties of SFRC, while the remaining six full-scale beams were tested under shear loading. Fiber density, orientation number at the cracking surface (assessed through image analysis), and tomography analysis were also evaluated. Based on the findings, orientation factors to be adopted in the structural design of SFRC elements are proposed for both shear and flexural design.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"474 ","pages":"Article 141054"},"PeriodicalIF":7.4,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143746786","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}

{"title":"Investigating the modifying mechanism of polyphosphoric acid on asphalt: From the colloidal component perspective","authors":"Guiyong Liu ,&nbsp;Weizheng Liu ,&nbsp;Xiaolong Yang ,&nbsp;Hongliu Rong","doi":"10.1016/j.conbuildmat.2025.141010","DOIUrl":"10.1016/j.conbuildmat.2025.141010","url":null,"abstract":"<div><div>This study separated four colloidal components of polyphosphoric acid (PPA) modified asphalts, which were made with three base asphalts from different oil sources and two grades of PPA. Frequency sweep tests were conducted on 27 of these oily components to obtain viscoelastic parameters according to the Williams-Landel-Ferry (WLF), Arrhenius, and standard logistic models. Infrared spectroscopy was used to gather molecular structural information of all components, and a semi-quantitative analysis method was applied to assess the molecular structural changes of each component. The results show that the rheological properties of the same components from different base asphalts vary to some extent, indicating differences in molecular structure. This leads to differential effects of the two grades of PPA on each oily component. Specifically, PPA significantly increases the complex modulus (G*) of the resins. Moreover, PPA with longer molecular chains shows a greater increase in the G* for the resins with lower aromaticity. Meanwhile, the G* of the aromatics and saturates exhibits distinct trends after PPA modification. First, this result indicates that PPA can indeed react with each asphalt oily component to some extent, causing changes in the rheological properties of the lighter components. Second, the significance of this reaction is determined by the aromaticity of the asphalt molecular structure and the polarity of the PPA molecules. The infrared spectroscopy results show that PPA significantly increases the polarizability of asphaltenes and resins. Furthermore, the functional groups of PPA mainly precipitate in the asphaltenes. This indicates that there is a substance transfer occurring within the asphalt during PPA modification. The study results point out that after PPA modification, the mechanical properties of the lighter components (serve as the dispersed phase) will change to varying degrees, which is also one of the important factors leading to the changes in asphalt performance. The oil-source-induced variability of PPA-modified asphalt is affected by the molecular weight and aromaticity of the asphalt molecules.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"474 ","pages":"Article 141010"},"PeriodicalIF":7.4,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143746932","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}

{"title":"Development of self-sensing asphalt cementitious composites using conductive carbon fibre and recycled copper tailing","authors":"Yipu Guo ,&nbsp;Fulin Qu ,&nbsp;Rohit Tiwari ,&nbsp;Doo-Yeol Yoo ,&nbsp;Kejin Wang ,&nbsp;Yizhe Wang ,&nbsp;Wengui Li","doi":"10.1016/j.conbuildmat.2025.140965","DOIUrl":"10.1016/j.conbuildmat.2025.140965","url":null,"abstract":"<div><div>Disposal of the highly hazardous and large scale solid wastes such as tailings is a global challenge. To mitigate the heavy burden of tailings management while promoting the circular economy, this study combines smart material with tailings recycling, presenting a pioneering investigation into the reutilizing copper tailings (CT) as an alternative to limestone filler (LF) for the development of sustainable carbon fibre (CF)-based self-sensing asphalt concrete. The conductivity, percolation zone, impedance spectroscopy, self-sensing performance, porosity distribution, immobilization of toxic metals, road performance, and cost-benefit analysis were comprehensively examined. The results indicate the incorporating CT enhances high-temperature resistance but reduces low-temperature cracking resistance and increases moisture susceptibility of asphalt concrete when CT substation exceeds 50 %. However, substituting up to 50 % LF with CT meets the road performance criteria. Percolation is observed at approximately 0.1 % – 0.3 % CF for CT/CF asphalt concrete. A novel conductive path-based equivalent circuit model is established based on impedance spectra by separately allocating circuit elements to conductive phases, which is validated by the correlative analysis of variations in equivalent circuit elements and their alignments to percolation theory and the results of conductivity and piezoresistivity. This contributes to the understanding of conductive and sensing mechanisms of CF-based self-sensing asphalt concrete. The findings will advance smart road technology while promote mine waste reutilization for enhanced traffic detection and structural health monitoring.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"474 ","pages":"Article 140965"},"PeriodicalIF":7.4,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143746285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Strengthening fire-damaged concrete with jute fiber-reinforced biopolymer: Experimental investigation and sustainability assessment","authors":"Atichon Kunawisarut ,&nbsp;Pitcha Jongvivatsakul ,&nbsp;Tidarut Jirawattanasomkul ,&nbsp;Sirichai Pethrung ,&nbsp;Thanyawat Pothisiri ,&nbsp;Dawei Zhang ,&nbsp;Suched Likitlersuang","doi":"10.1016/j.conbuildmat.2025.141081","DOIUrl":"10.1016/j.conbuildmat.2025.141081","url":null,"abstract":"<div><div>Fire-induced damage significantly compromises the structural integrity of concrete, necessitating effective and sustainable repair solutions. This study investigates the effectiveness of jute fiber-reinforced biopolymer (JFRB) composites in restoring the compressive strength of fire-damaged concrete, with a focus on strength performance, predictive modeling, and sustainability. Concrete cylinders with compressive strengths of 35 MPa (S1) and 46 MPa (S2) were exposed to standard fire conditions for 30, 45, and 60 min. Subsequently, the fire-damaged specimens were strengthened with either 1–3 layers of jute fiber-reinforced biopolymer (JFRB) composites or a single layer of carbon fiber-reinforced biopolymer (CFRB) composites. Compression tests were conducted to evaluate the capacity of JFRB and CFRB in restoring the compressive strength of the damaged concrete. The results revealed that JFRB confinement significantly improved residual strength, particularly after 60 min of fire exposure. Strengthening with JFRB composites resulted in compressive strength gains of 2.02–3.69 times for S1 and 1.86–3.67 times for S2, depending on the number of layers applied. Notably, specimens wrapped with three layers of JFRB achieved strength recovery comparable to those reinforced with a single layer of CFRB, highlighting their potential for practical structural rehabilitation applications. Furthermore, an empirical model was developed to predict the compressive strength of both undamaged and fire-damaged concrete confined with JFRB. The model demonstrated superior accuracy compared to existing models, with prediction closely aligning with experimental results (R²=0.83), in estimating the compressive strength of JFRB-confined, fire-damaged concrete. These findings offer a strong experimental foundation and theoretical framework for the integration of JFRB composites into structural engineering practices. A sustainability assessment further highlighted the cost-effectiveness and environmental benefits of JFRB, demonstrating its potential as a practical and eco-friendly material for structural rehabilitation. Therefore, these findings emphasize the dual benefits of using JFRB composites to address both performance recovery and sustainability challenges in fire-damaged structures.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"474 ","pages":"Article 141081"},"PeriodicalIF":7.4,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143746361","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}

{"title":"Acid corrosion deterioration of carbonaceous shale: Mechanism revealed from shear properties and macro-micro structure","authors":"Xiangyu Zhang ,&nbsp;Bin Hu ,&nbsp;Jing Li ,&nbsp;Lei Huang ,&nbsp;Zhen Zhang ,&nbsp;Bingyan Li ,&nbsp;Zhuoxi Zhong ,&nbsp;Congcong Wan","doi":"10.1016/j.conbuildmat.2025.141062","DOIUrl":"10.1016/j.conbuildmat.2025.141062","url":null,"abstract":"<div><div>Aiming to investigate the deterioration mechanism of carbonaceous shale in acidic environment, direct shear tests were carried out on samples soaked in oxalic acid solution, and the macro-micro structure were scanned and analyzed. The results show that the plasticity of rock was enhanced significantly under acidic conditions. Carbonaceous shale can chemically react with oxalic acid, the fundamental mechanism of acid corrosion was the loss of mineral components and the irreversible damage of macro-micro structure. The increase of acidity and soaking time both aggravate the chemical damage, the shear properties gradually deteriorated, and eventually led to the serious deterioration of rock.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"474 ","pages":"Article 141062"},"PeriodicalIF":7.4,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143746294","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}