Construction and Building Materials最新文献

{"title":"Analysis of the stepwise immobilization of phosphorous and fluoride in PG leachate using Fe-doped C-S-H (Fe-C-S-H) prepared with gasification slag and the application of the solidified product","authors":"Qiangwei Hu ,&nbsp;Haixiang Xu ,&nbsp;Qigui Xia ,&nbsp;Zhiqi Zhang","doi":"10.1016/j.conbuildmat.2025.141396","DOIUrl":"10.1016/j.conbuildmat.2025.141396","url":null,"abstract":"<div><div>Phosphogypsum leachate contains large amounts of phosphorus and fluoride impurities, resulting in serious pollution of soils and water bodies. This study synthesized calcium silicate hydrate (C-S-H) using SiO₂ and CaO, and Fe-doped calcium silicate hydrate (Fe-C-S-H) using fine coal gasification slag (FCGS) and CaO, both employed to immobilize phosphorus and fluoride impurities in phosphogypsum leachate. In this study, a stepwise precipitation method was applied to control the pH of the leachate system, with F^-, HPO₄^2-, and PO₄^3- in the leachate sequentially immobilized. In addition, the influences of C-S-H and Fe-C-S-H prepared with different calcium-to-silicon ratios on the immobilization efficiency of phosphorous and fluoride impurities were explored. Through XRD, FT-IR, zeta potential, SEM-EDS, and molecular dynamics, the mechanisms of phosphorus and fluoride immobilization by these materials were investigated. Furthermore, The immobilized leachate was further utilized as an admixture for phosphogypsum building materials (PBG) to produce enhanced PBG products, thus achieving the recycling utilization of phosphogypsum leachate. Results indicated that at a calcium-to-silicon ratio of 1.2, both C-S-H and Fe-C-S-H achieved optimal rates of immobilization for phosphorus and fluoride, with residual ion concentrations meeting Class V water discharge standards specified in <em>Environmental Quality Standards for Surface Water</em> (GB 3838–2002). In addition, F^-, HPO₄^2- and PO₄^3- in the phosphogypsum leachate spontaneously adsorbed onto the (001) crystal planes of C-S-H and Fe-C-S-H. PBG specimens incorporating the immobilized phosphogypsum leachate exhibited a 23.47 %–38.22 % increase in compressive strength. This study not only introduces a novel approach for FCGS utilization but also establishes an innovative method for immobilizing phosphorus and fluoride impurities in phosphogypsum leachate, thus promoting the circular utilization of phosphogypsum waste.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"481 ","pages":"Article 141396"},"PeriodicalIF":7.4,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143899464","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":"Effects of aging on the rheological and microscopic properties of partially epoxidized soybean oil rejuvenated asphalt binders","authors":"Yang Zhang,&nbsp;Junlin Li,&nbsp;Chang Ge,&nbsp;Conglin Chen,&nbsp;Tao Ma","doi":"10.1016/j.conbuildmat.2025.141527","DOIUrl":"10.1016/j.conbuildmat.2025.141527","url":null,"abstract":"<div><div>The sustainable utilization of reclaimed asphalt pavement (RAP) is crucial for conserving natural resources, preventing excessive waste, and improving cost efficiency in pavement engineering. However, subsequent aging of rejuvenated asphalt remains a critical challenge that could potentially diminish the long-term performance of the pavement. In this study, the aging behavior of partially epoxidized soybean oil (PESO) rejuvenated aged asphalt binders was investigated using PESO at different dosages and epoxy values. The secondary and severe aging of PESO rejuvenated asphalt was treated by pressure aging vessel (PAV) test. Fourier transform infrared Spectroscopy (FTIR) and atomic force microscopy (AFM) tests were used to analyze the changes in functional group composition and micro-morphology of the rejuvenated binders before and after aging. The rheological behavior of the secondary aged PESO rejuvenated asphalt was evaluated by dynamic shear rheometer (DSR) and bending beam rheometer (BBR) tests. After the severe aging process, the proportion of \"non-bee structure\" regions decreased by only 3.97 %, indicating PESO rejuvenated asphalt binder owned excellent resistance to severe aging. The three functional group indices and master curves clearly demonstrated a positive correlation between secondary aging resistance and elasticity with PESO's epoxy value, but a negative correlation with the dosage. Under identical aging conditions, the master curve of PESO rejuvenated asphalt exhibited significantly smaller variations compared to that of the base asphalt, indicating superior anti-aging performance of PESO rejuvenated binders. PAV-aged PESO rejuvenated asphalt binders with a high dosage and low epoxy value exhibited a higher λ value, resulting in enhanced low-temperature performance and cracking resistance. Overall, PESO rejuvenated asphalt binders outperformed base asphalt binders regarding the aging behaviors, which demonstrated the applicability of PESO as a sustainable rejuvenator for aged asphalt.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"481 ","pages":"Article 141527"},"PeriodicalIF":7.4,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143894283","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":"Thermal stability and mechanical behavior of cementitious composites reinforced with industrial and recycled tire steel fibers under elevated temperature conditions","authors":"Abdulaziz Alsaif,&nbsp;Yassir M. Abbas","doi":"10.1016/j.conbuildmat.2025.141580","DOIUrl":"10.1016/j.conbuildmat.2025.141580","url":null,"abstract":"<div><div>The integration of Recycled Tire Steel Fibers (RTSF) into cement-based materials offers a promising approach to enhancing sustainable construction practices; however, research on the performance of RTSF under elevated temperatures is critically limited. This study investigates the mechanical behavior of cementitious composites reinforced with RTSF at dosages of 0.75 and 1.0 (%, vol.), in comparison to composites reinforced with industrial steel fibers (ISF) and a plain control mixture. A systematic experimental methodology was employed, wherein the composites' compressive and flexural behaviors were assessed at ambient temperature (approximately 22°C) and after exposure to elevated temperatures of 300°C and 500°C for four hours. The results indicate that ISF maintained complete mass stability under these conditions, exhibiting no mass loss, whereas RTSF experienced gradual reductions of 0.71 % and 1.00 % at 300°C and 500°C, respectively. Following a four-hour exposure to 500°C, some of the tested plain and fiber-reinforced specimens were damaged. Microscopic evaluations revealed distinct thermal cracking patterns, with RTSF retaining its metallic sheen at 300°C while ISF showed degradation. The elastic modulus of the control mix decreased significantly from 25.8 GPa at 22°C to 11.9 GPa at 500°C, while RTSF demonstrated notable reductions in modulus due to microcracking. Notably, RTSF-1.0 demonstrated the highest strength gains at 22°C, with a 0.7 % increase in compressive strength and a 157.1 % increase in flexural strength compared to the control mix, and achieved the highest flexural strength of 8.3 MPa at 300°C, indicating potential benefits in crack arrest and chloride penetration reduction. These findings provide foundational insights into the viability of RTSF for applications in fire-resistant infrastructure, which highlights the importance of optimizing fiber dosage for enhanced performance.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"481 ","pages":"Article 141580"},"PeriodicalIF":7.4,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143899352","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":"Bonding behavior of GFRP bars and macro fiber reinforced concrete (MFRC): Tests and analytical modeling","authors":"Zhan Guo ,&nbsp;Quanhui Wang ,&nbsp;Yingwu Zhou ,&nbsp;Bing Fu ,&nbsp;Hong Yuan","doi":"10.1016/j.conbuildmat.2025.141477","DOIUrl":"10.1016/j.conbuildmat.2025.141477","url":null,"abstract":"<div><div>A novel environmentally friendly concrete has been recently developed in the authors’ group by incorporating macro fibers processed from waste glass fiber reinforced polymer (GFRP) composites into ordinary concrete. Owing to their superior anti-corrosion performance, the combined utilization of FRP composites and MFRC in structural construction is seen as a tremendous demand for coastal and marine construction as well as the potential for exploitation of marine resources. To ensure the compatibility between FRP bars and MFRC, superior bond performance is a prerequisite for the design and application of FRP reinforced MFRC structures. This paper has therefore conducted for studying the bond behaviors between GFRP/steel bars (specifically refers to GFRP bar or steel bar, rather than a hybrid of steel and GFRP bars) and MFRC through 72 pull-out tests with GFRP/steel bars embedded in macro fiber concrete. The effects of GFRP/steel bar diameters (8 mm, 12 mm, and 16 mm), bar embedded lengths (1<em>d</em>, 3<em>d</em>, and 5<em>d</em>), concrete strength (C30 and C50), and macro fiber contents (0.0 vol%, 0.5 vol%, 1.0 vol%, and 1.5 vol%) on the failure patterns, bond mechanism, and bond-slip curves of specimens were systematically analyzed. The test results indicate that the bond stress-slip curves of GFRP bars exhibit a sinusoidal decay after reaching the peak value, in contrast to the direct decline observed in conventional steel bars. With the increased rib height and decreased bar diameter, the bond strength between MFRC and FRP bars under pull-out conditions is enhanced accordingly. Increasing bonding lengths leads to a gradual decrease in the bond strengths, while the increase in concrete strengths and macro fiber contents generally improves the bond strengths. Within a reasonable range, the improvement of bond strengths will become more pronounced when the volume contents of macro fibers exceed 1.5 vol%. Overall, the influential parameters have a more significant impact on bond strengths between steel bars and macro fiber concrete compared to GFRP bars. Subsequently, this study also evaluates the accuracy and applicability of existing analytical models in predicting bond strengths between GFRP/steel bars and ordinary concrete, and then proposes corresponding modified prediction models for quantifying the bond-slip behavior between GFRP/steel bars and MFRC, resulting in more accurate predictions based on test results.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"481 ","pages":"Article 141477"},"PeriodicalIF":7.4,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143894422","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":"Self-catalytic interior decoration materials engineered with birnessite@C-S-H heterostructures: Toward photocatalytic formaldehyde degradation","authors":"Changye Mang ,&nbsp;Jun Luo ,&nbsp;Xiduan Yang ,&nbsp;Hao Jiang ,&nbsp;Mingjun Rao ,&nbsp;Guanghui Li ,&nbsp;Tao Jiang","doi":"10.1016/j.conbuildmat.2025.141554","DOIUrl":"10.1016/j.conbuildmat.2025.141554","url":null,"abstract":"<div><div>Photocatalysts require suitable support materials for practical applications, but the high cost and poor compatibility of current carriers hinder large-scale use. Calcium silicate hydrate (CSH), a promising interior decoration material, offers ideal support for photocatalysts. In this study, a birnessite@CSH heterostructure was synthesized using a one-step hydrothermal method. The structure, physicochemical properties, and photocatalytic activity (PCA) of the heterojunction were analyzed at various reaction temperatures and birnessite doping levels. Results revealed that CSH weakened the Mn-O bonds in birnessite, lowering the conduction band position and reducing the band gap. The electrons in the Mn-O band were excited under visible light irradiation, which promoted the transformation of lattice O into active surface O. This activation created oxygen vacancies, which inhibited the recombination of photogenerated electrons and holes, leading to the formation of more active radicals and enhanced PCA. The optimized birnessite@CSH composite achieved 89.92 % degradation of HCHO under visible light, demonstrating its potential for effective indoor air pollution removal.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"481 ","pages":"Article 141554"},"PeriodicalIF":7.4,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143899430","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":"Charge-space dual effects inducing Eu2 +-Ce3 + ions occupancy luminescence in NaSiAlO4 constructed by waste glass coupled aluminum air batteries byproduct Al(OH)3","authors":"Wenjiao Deng ,&nbsp;Zhifeng Zhang ,&nbsp;Chaoyu Qin ,&nbsp;Fabin Cao ,&nbsp;Weiming Liu ,&nbsp;Xingmei Shen","doi":"10.1016/j.conbuildmat.2025.141541","DOIUrl":"10.1016/j.conbuildmat.2025.141541","url":null,"abstract":"<div><div>To explore new approaches for converting solid waste into function materialization, this study investigates that the occupational luminescent structures were constructed by waste glass slag coupled with aluminum-air batteries byproduct Al(OH)₃ through glass relaxation crystallization from molten state. Self-skeleton ion Al³ ⁺ ions and additional skeleton ion B³ ⁺ ions replacing partial Si⁴ ⁺ ions for constructing excellent luminescent structure units. The substitution of Si⁴ ⁺ ions by Al³ ⁺/B³ ⁺ ions intensifies lattice distortion and local structural charge rearrangement, triggering charge-space dual effects inducing Eu²⁺-Ce³ ⁺ ions’ selective occupation luminescence. When Al³ ⁺/B³ ⁺ ions replaced Si⁴⁺ ions, the luminescent intensity of the material increased by 30.67 %/40.83 %. By introducing waste glass slag and aluminum-air battery byproduct Al(OH)₃ as substitute, it was achieved for high-value-added materialization application. The optimal content of substitution slag is 20 %, with the target material’s ∆E = 0.378 eV, demonstrating good thermal stability.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"481 ","pages":"Article 141541"},"PeriodicalIF":7.4,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143899432","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":"Binocular stereo vision-based analysis of skid resistance in asphalt mixtures: A study of AC-13, SMA-13, and OGFC-13","authors":"Yuhong Luo ,&nbsp;Peng Guo ,&nbsp;Chenguang Shi ,&nbsp;Junfeng Gao ,&nbsp;Chenghui Lu ,&nbsp;Shengjie Cheng ,&nbsp;Yixue Shang","doi":"10.1016/j.conbuildmat.2025.141522","DOIUrl":"10.1016/j.conbuildmat.2025.141522","url":null,"abstract":"<div><div>Evaluating the skid resistance of asphalt mixtures is crucial for enhancing road safety. This study investigates the skid resistance and surface texture characteristics of three types of asphalt mixtures-asphalt concrete (AC-13), stone matrix asphalt (SMA-13), and open graded function course (OGFC-13)-under varying wear durations. Using binocular stereo vision, surface texture information was captured to calculate both macro- and micro-texture parameters. Skid resistance was assessed through the sand patch and British Pendulum tests. A regression model was developed to relate texture parameters to skid resistance, revealing a segmented decline in skid resistance through three distinct phases: growth, attenuation, and stability. The results indicate significant correlations between macro-texture parameters (e.g., mean texture depth, arithmetic mean, peak spacing) and texture depth (<em>TD</em>), with correlation coefficients ranging from 0.45 to 0.80. The regression model, based on the logarithmic transformation of the power function, demonstrated superior accuracy in predicting the relationship between macro-texture parameters and <em>TD</em> compared to multiple linear regression. Furthermore, the fractal dimension and British Pendulum number (<em>BPN</em>) were best fitted using a Gaussian nonlinear function. This study highlights the effectiveness of binocular stereo vision in analyzing skid resistance changes over time; however, additional texture parameters are required for a more comprehensive analysis.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"481 ","pages":"Article 141522"},"PeriodicalIF":7.4,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143899424","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":"Influence of CFRP jackets stiffness on the performance of coal cylinders: 3D PFC- FLAC coupled numerical investigation","authors":"Qingwen Li,&nbsp;Wenxia Li,&nbsp;Chuangchuang Pan,&nbsp;Mengjiao Xu,&nbsp;Shuhan Gu,&nbsp;Shuaishuai Zhang,&nbsp;Zhenglin Tan","doi":"10.1016/j.conbuildmat.2025.141538","DOIUrl":"10.1016/j.conbuildmat.2025.141538","url":null,"abstract":"<div><div>Carbon fiber reinforced polymer (CFRP) jacketed coal cylinders represent a potential new material-based method for enhancing the stability of coal pillars in goaf, and CFRP jackets stiffness is the most critical parameter. However, traditional continuum-based numerical models cannot model the meso-mechanics of coal cylinders due to its discrete nature. In this paper, a three-dimensional discrete element method (DEM) and the finite difference method (FDM) coupled numerical modeling scheme was proposed. CFRP jackets is modeled by the continuum method using FLAC^3D and the coal cylinders is modeled by the discrete element method using PFC^3D. The proposed numerical models are validated using laboratory observations. The influence of CFRP jacket stiffness on the contact force fabric, crack propagation, and characteristic stress of axially compressed coal cylinders were investigated. Numerical results demonstrate that the anisotropy of the normal contact force fabric gradually decreases with the increase in CFRP jacket stiffness. The characteristic stresses (cracking, yielding, and peak) increase significantly as CFRP jacket stiffness enhances, following a positive exponential decay function relationship. The cumulative number of cracks grows in an \"S-shaped\" Bidoseresp function pattern with increasing axial strain. These findings provide critical references for the application of CFRP jackets in the reinforcement of residual coal pillars in goaf areas.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"481 ","pages":"Article 141538"},"PeriodicalIF":7.4,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143894424","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 low-carbon cement utilizing waste incineration ash: Mechanical properties, hydration behavior, and environmental impact","authors":"Jie Chen ,&nbsp;Yizhe Shen ,&nbsp;Zhiliang Chen ,&nbsp;Peng Zhang ,&nbsp;Xiaoqing Lin ,&nbsp;Masaki Takaoka ,&nbsp;Xiaodong Li ,&nbsp;Jianhua Yan","doi":"10.1016/j.conbuildmat.2025.141584","DOIUrl":"10.1016/j.conbuildmat.2025.141584","url":null,"abstract":"<div><div>Developing low-carbon cement from municipal solid waste incineration ash (fly ash (FA) and bottom ash (BA)) is vital for solid waste management and reducing carbon emission. Raw FA was pretreated by ultrasonic accelerated carbonation and ultrasound-assisted carbonated fly ash (UFA) was introduced to create a novel UFA-BA-cement (UBC). The UBC paste demonstrated excellent compressive strength (33.2 MPa) and resistance to chloride penetration due to its refined pore structure. Both UFA and BA exhibited dilution and filling effects, with UFA notably enhancing the early hydration reaction (0–1 hour) of UBC. This significantly increased the polymerization degree of the early curing UBC paste, resulting in a dense microstructure. The addition of gypsum or CaO (2.5 % and 5 %) has a negative effect on the UBC cement system. Reducing the cement clinker ratio from 50 % to 40 % significantly weakened the paste strength. Additionally, the chloride salts in BA reacted with CaCO₃, forming insoluble chloride salt Tunisite (NaCa₂Al₄(CO₃)₄(OH)₈Cl), which further strengthened cement structure. The leaching concentrations of As, Ba, Cr, Cu, Ni, Pb, Se, and Zn are all lower than the Chinese groundwater grade IV standard. According to life cycle assessment, the UBC scenario emits the least CO₂ (322 kg-CO₂ eq.), which is 53.6 % lower than that of plain cement. Therefore, although the compressive strength of UBC is lower than that of plain cement (PC), its significant advantages in carbon emission reduction, environmental performance, and resource recovery make it a promising low-carbon alternative for non-structural and semi-structural applications, supporting the sustainable utilization of FA.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"481 ","pages":"Article 141584"},"PeriodicalIF":7.4,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143894418","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-situ generation of silicon carbide whisker to enhance service performance of silicon carbide reticulated porous filter using a replica template method and novel carbon-silicon microspheres","authors":"Ruoyu Chen ,&nbsp;Jiaxuan Xin ,&nbsp;Gang Qi ,&nbsp;Yi Ding ,&nbsp;Minghui Li ,&nbsp;Saisai Li ,&nbsp;Haijun Zhang","doi":"10.1016/j.conbuildmat.2025.141504","DOIUrl":"10.1016/j.conbuildmat.2025.141504","url":null,"abstract":"<div><div>Silicon carbide reticulated porous filters are widely used in steel and alloy smelting industries. However, the hollow voids and microcracks in the ceramic skeletons, caused by the burnout of polymer templates, negatively impact the strength, thermal shock resistance, and corrosion resistance of the filters. In this study, the replica template method was employed with slurries containing novel carbon-silicon microspheres to reconstruct the microstructure of the silicon carbide skeleton and enhance the performance of the filters. The incorporation of carbon-silicon microspheres significantly improved the flowability and structural reconstruction ability of the slurry, resulting in a more homogeneous coating layer within the template. After sintering at 1550°C, silicon carbide whiskers were in-situ generated within the hollow voids, microcracks, and on the surface of the silicon carbide skeleton, thereby improving compressive strength and thermal shock resistance. Additionally, the poor wettability between the sample and molten copper enhances the fluidity of the copper solution within the filter, effectively preventing it from adhering to the ceramic filter. This reduces the risk of blockage and minimizes the potential for corrosion of the ceramic filter by the molten copper.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"481 ","pages":"Article 141504"},"PeriodicalIF":7.4,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143894425","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}