Journal of Materials in Civil Engineering最新文献

{"title":"Pretreatment of Municipal Solid Waste Incineration Bottom Ash for Utilization in Magnesium Oxysulfate Cement","authors":"S. Kevin Zhou, Na Zhang, Congcong Ma, Haixin Jin, Haojun Gao, Zhiqiang Tian, Jinghui Guo, Wenjia Feng, Mingfang Ba","doi":"10.1061/jmcee7.mteng-21445","DOIUrl":"https://doi.org/10.1061/jmcee7.mteng-21445","url":null,"abstract":"The utilization of municipal solid waste incineration bottom ash (MSW-IBA) as a resource is critical to achieving its potential social and environmental benefits. This study investigated the effects of MSW-IBA and its finely ground powder (MSW-IBAP) as fine aggregates and mineral admixtures on the mechanical strength, hydration product composition, and microstructure of magnesium oxysulfate cement (MOSc). These properties were characterized through mechanical strength testing, X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM), and mercury intrusion porosimetry (MIP). The results demonstrated that MOSc prepared with preaged MSW-IBAP (treated with 4 mol/L NaOH at 20% content as an admixture) exhibited an optimized microstructure and hydration product composition [Mg(OH)2 to 5·1·7 phase ratio], resulting in superior mechanical properties. In addition, the preaging treatment of MSW-IBAP facilitated the formation of M-S-H gel–like hydration products, significantly improving the water resistance of MOSc. The use of MSW-IBA as both a mineral admixture and fine aggregate in MOSc provides notable technical and economic advantages. Furthermore, this approach offers a novel pathway for the resource utilization of MSW-IBA, contributing to substantial social and environmental benefits.","PeriodicalId":16330,"journal":{"name":"Journal of Materials in Civil Engineering","volume":"38 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147916660","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Density Functional Theory-Based Mechanism of Antioxidant Activity of Phenols as Asphalt Antioxidants","authors":"Shinan Liu, H Wang, Jun Yang","doi":"10.1061/jmcee7.mteng-21291","DOIUrl":"https://doi.org/10.1061/jmcee7.mteng-21291","url":null,"abstract":"The antioxidant qualities of phenolic chemicals found in asphalt have drawn a lot of attention. By comparing theoretical calculations with experimental results, we evaluate the applicability of various antioxidant indices for assessing the efficacy of phenolic antiaging compounds in asphalt and unveil the antiaging mechanism of phenolic antioxidants in asphalt. By analyzing the correlation between oxygen radical absorbance capacity values and asphalt experimental results as well as the correlation between bond dissociation energy (BDE) and asphalt experimental results, it can be observed that the antioxidant mechanism of phenolic compounds in asphalt aligns with the hydrogen atom transfer (HAT) mechanism. In contrast, ferric reducing antioxidant power values, vertical ionization potential, electronegativity (χ), chemical hardness (η), and electrophilicity index (ω) show no correlation with any asphalt experimental results, indicating that the antioxidant mechanism of phenolic compounds in asphalt is not based on the single electron transfer (SET) mechanism. This suggests that the antioxidant mechanism of phenolic antioxidants for asphalt is not the HAT mechanism but rather the SET mechanism, related to the phenolic hydroxyl content, the arrangement of hydroxyls in the ortho-dihydroxy conformation and BDE values of the phenolic O─ H bond. These results indicate that enhancing the antioxidant activity of phenolic antioxidants may be achieved by reducing the BDE of the phenolic O─ H bond, modifying the arrangement of hydroxyls, and increasing the phenolic hydroxyl group content.","PeriodicalId":16330,"journal":{"name":"Journal of Materials in Civil Engineering","volume":"38 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147914589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Piezo-Phototronic Effect Enhanced Photocatalytic Coatings Containing BaTiO3/BiOCl for Cement-Based Materials","authors":"Tianlei Wang, Yao Chen, Xueping Wang, Wei Zhao, Rui Xu","doi":"10.1061/jmcee7.mteng-20636","DOIUrl":"https://doi.org/10.1061/jmcee7.mteng-20636","url":null,"abstract":"Due to its advantages of simple construction and easy combination with the substrate, photocatalytic coating technology is recognized as an effective means to reduce the surface corrosion of cement-based materials and improve environmental pollution. However, the rapid recombination of electrons and holes about the photocatalyst severely limit the photocatalytic degradation efficiency. This problem was solved by successfully preparing BaTiO3/BiOCl heterojunction to accelerate the charge transfer rate in this paper. At the same time, through an external mechanical action, the piezoelectric-photon effect of the material is used to further enhance its degradation ability. Due to the piezo-phototronic effect, the degradation efficiency is 1.33 times higher than the photocatalytic degradation efficiency of BaTiO3/BiOCl-1∶6, which confirmed the effectiveness of the piezo-phototronic effect in enhancing photocatalytic performance. Subsequently, BaTiO3/BiOCl was coated on the cement-based surface with polydimethylsiloxane as the matrix. The hydrophobic properties of the coating are also improved after the incorporation of nanomaterials; however, the bond strengths decrease slightly. More importantly, the coating based on BaTiO3/BiOCl nanomaterials can only degrade 50% of methylene blue in 5 h under light conditions, whereas 98.4% can be degraded in 100 min under ultrasonic and light conditions. Therefore, the piezoelectric enhanced photocatalytic coating based on BaTiO3/BiOCl can improve the degradation efficiency of pollutants on the surface of cement-based materials, which provides an effective method and new protection for the corrosion of cement-based materials.","PeriodicalId":16330,"journal":{"name":"Journal of Materials in Civil Engineering","volume":"38 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147880940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploring Early Carbonation Properties of Sr4Al6O12SO4 Compound for a Sustainable Alternative to Cement Clinker","authors":"Jaures Syntyche Ndzila, Zhengxian Yang, Jiankun Xu","doi":"10.1061/jmcee7.mteng-20803","DOIUrl":"https://doi.org/10.1061/jmcee7.mteng-20803","url":null,"abstract":"Sr4Al6O12SO4 is a compound that can be used as a sustainable alternative to cement clinker for producing low-carbon precast concrete products. In this study, we examine the impact of CO2 curing on early carbonation properties of Sr4Al6O12SO4. The findings indicate that the carbonation potential of Sr4Al6O12SO4 is substantial for use in CO2 sequestration within the construction sector. The carbonation strength and CO2 uptake of the concrete blocks exhibit a positive correlation with extended carbonation duration, achieving a maximum compressive strength of 63 MPa after 48 h of carbonation. Compared with 2 h, the beneficial strength gain at 24 and 48 h is 39.57% and 70.73%, respectively. This strength gain is mainly due to the formation of rich carbonation products and the reduction of porosity and average pore size within the paste matrix. Furthermore, due to its high degree of crystallinity, SrCO3 is identified as the primary crystalline carbonation product, characterized by large micrometer-sized subrounded grain aggregates. The continued formation of SrCO3 encapsulates unreacted species covered by wet gel layers, leading to a thick microstructure that significantly enhances mechanical strength. This study presents a promising way for employing CO2 curing to produce eco-friendly Sr4Al6O12SO4-based construction materials.","PeriodicalId":16330,"journal":{"name":"Journal of Materials in Civil Engineering","volume":"38 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147903511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis of Shrinkage-Reducing Admixture with Different Branch Chain Structures and Its Effect on the Drying Shrinkage of Cement-Based Materials","authors":"Wenyan Zhang, Wenjing Kang, Seunghyun Na, Surendra P. Shah, Mengfen Xue, Faqiang Su, Jianping Zhu","doi":"10.1061/jmcee7.mteng-20557","DOIUrl":"https://doi.org/10.1061/jmcee7.mteng-20557","url":null,"abstract":"Shrinkage-reducing admixtures (SRAs) can effectively mitigate the drying shrinkage of cement-based materials, but the influence of SRA structures with varying configurations on drying shrinkage remains unclear. This study mainly synthesized two types of SRA by using different shrinkage-reducing monomers and investigated the impact of SRA with distinct branch chain structures on the surface tension, contact angle, and viscosity of solution. Then, the drying shrinkage, mechanical properties, and microstructure of cement-based materials with SRA were further discussed. The findings indicated that Type II SRA with a complex branched-chain structure presents a greater steric hindrance effect, leading to a more significant decrease of surface tension and increase of solution viscosity and contact angle than that of Type I SRA. Meanwhile, samples with Type I SRA presented a smaller drying shrinkage, whereas Type II SRA showed a stronger reduction in surface tension, indicating the mechanism of SRA inhibiting the drying shrinkage is not limited to the reduction of surface tension. Pores below 50 nm are conducive to reducing drying shrinkage, and the pore volume of sample with Type I SRA was significantly reduced by 20.3%, which showed an excellent drying shrinkage inhibition effect.","PeriodicalId":16330,"journal":{"name":"Journal of Materials in Civil Engineering","volume":"37 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147917411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Freeze–Thaw Performance of Cement and Fly Ash–Stabilized Molybdenum Tailings Sand","authors":"Zhimin Li, Qin Xu, Minghui Sun, Pan Zhang, Hongbo Liu, Futong Wang","doi":"10.1061/jmcee7.mteng-20592","DOIUrl":"https://doi.org/10.1061/jmcee7.mteng-20592","url":null,"abstract":"","PeriodicalId":16330,"journal":{"name":"Journal of Materials in Civil Engineering","volume":"37 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147906782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preparation and Properties of Highly Flexible Acrylic–Epoxy Resin with Self-Stratification Waterproof Material for Steel Bridge Decks","authors":"Huiyun Xia, Yong Yue, Xu Li, Lifang Song, Changjie Lu, Liying Cui, Yanhui Niu","doi":"10.1061/jmcee7.mteng-20293","DOIUrl":"https://doi.org/10.1061/jmcee7.mteng-20293","url":null,"abstract":"Due to the complex construction processes, long construction cycles, poor deformation coordination, and lack of flexibility in the existing waterproof adhesive layer (WAL) for steel bridge decks, a new type of high-flexibility WAL with a self-stratifying effect was proposed. In this paper, firstly, four different low glass transition temperatures (−20°C, −15°C, −10°C, −5°C) of poly (2-ethylhexyl acrylate-co-butyl acrylate-co-methyl methacrylate-co-styrene) (EBMS) were synthesized by free radical solution polymerization. The chemical composition, glass transition temperature and molecular weight of EBMS were characterized by Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry, and gel permeation chromatography. Secondly, the EBMS was physically blended with epoxy resin (E51) in different mass ratios to prepare E51/EBMS self-stratifying WAL. During the mixing process, a polyamide curing agent matching the epoxy equivalent of E51 was added. The self-stratifying behavior of WAL was studied by measurements of FTIR, scanning electron microscopy, water contact angle, and shore A hardness. At the same time, the feasibility of self-stratification was verified by surface energy theory. Thirdly, according to relevant standards, the conventional performance and road performance of WAL were measured. It was found that when E51 was mixed with –15°C EBMS, the WAL exhibited optimal comprehensive performance. Finally, the mass ratio of E51/−15°C EBMS effect on the performance of self-stratifying coatings is discussed. With an optimum mass ratio of E51/−15°C EBMS of 6∶4, the elongation at break and adhesive strength of this WAL reached 140% and 7.9 MPa, respectively, fully meeting the requirements of WAL on the steel bridge deck. Compared with commercially available WAL, EBMS/E51 WAL significantly improves low-temperature performance and elongation at break. This research is anticipated to serve as a valuable reference for the design and production of WAL for steel bridge decks.","PeriodicalId":16330,"journal":{"name":"Journal of Materials in Civil Engineering","volume":"37 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147910409","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Different Superplasticizers on Carbonation Behavior of C2S and C4A3S¯ in Calcium Sulfoaluminate Cement","authors":"Fengming Yang, Jiateng Xie, Ning Tan, Zengmei Wang, Zengmei Wang","doi":"10.1061/jmcee7.mteng-19084","DOIUrl":"https://doi.org/10.1061/jmcee7.mteng-19084","url":null,"abstract":"The demand for the development of low-carbon and energy-saving technologies in the cement industry is extremely urgent, and calcium sulfoaluminate (CSA) cement has attracted much attention because of the low-carbon and energy-saving advantages for cement production. However, the disadvantage of CSA cement is that the hydration products are susceptible to carbonization, which may cause a decrease in the mechanical properties and durability of the cement matrix. To address this issue, this work focused on the primary minerals of CSA cement, and explored the effects of different superplasticizers on C2S and C4A3S¯. The study employed three types of superplasticizers: sodium lignosulfonate superplasticizer (CMN), naphthalene series superplasticizer (FDN), and polycarboxylate superplasticizer (PCE). The adsorption degree of these superplasticizers on C2S and C4A3S¯ was analyzed using ultraviolet spectroscopy (UV-Vis). Zeta potential measurements were conducted to assess the effect of superplasticizers on the surface potential of C2S and C4A3S¯, thereby studying their dispersion properties. Furthermore, the study examined the phase, composition, and morphology of different carbonation products under the action of superplasticizer by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, asynchronous thermal analyzer thermogravimetry coupled with differential scanning calorimeter (TG-DSC), and scanning electron microscopy (SEM), and then their carbonation activity was analyzed. The results indicated that the adsorption capacity of C4A3S¯ was higher for CMN and FDN compared to C2S, while C2S showed a higher adsorption capacity for PCE than C4A3S¯. This difference in adsorption was attributed to the distinct charging properties and main functional groups of the superplasticizers. Specifically, FDN formed a robust electrostatic repulsion layer when adsorbed on the surface of hydration particles, while PCE exhibited steric hindrance during adsorption. These actions affect the carbonation process of the minerals, resulting in the compressive strength and durability of CSA cement being affected as well.","PeriodicalId":16330,"journal":{"name":"Journal of Materials in Civil Engineering","volume":"37 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147895178","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Acid on the Crystal Phase and Water Resistance Properties of Magnesium Oxysulfate Cement","authors":"Haosheng Jiang, Jing Zhang, Bei Huang, Zebo Dong, Qiang Wang","doi":"10.1061/jmcee7.mteng-20196","DOIUrl":"https://doi.org/10.1061/jmcee7.mteng-20196","url":null,"abstract":"In this paper, the effects of eight different types of acids (oxalic, silicic, acetic, salicylic, citric, phosphoric, tartaric, and malonic acids) on the mechanical properties, water resistance, physical phase composition, and microstructure of magnesium oxysulfate cement (MOS) were investigated. The properties of the samples were characterized by compressive strength tests, X-ray diffraction (XRD) and scanning electron microscope (SEM), and the reasons for acid modification of MOS were analyzed. The results show that the addition of oxalic, silicic, acetic, and salicylic acid does not significantly improve the mechanical and water resistance properties of MOS, and the addition of citric, phosphoric, tartaric, and malonic acid promotes the generation of 5Mg(OH)2·MgSO4·7H2O (5·1·7 phase), which substantially improves the mechanical and water resistance properties of MOS. The mechanism of these four acid modifications is that the corresponding acid radical ions combine with the hydration shell [Mg(OH)(H2O)x]+ generated by the reaction of MgO in water, preventing the [Mg(OH)(H2O)x]+ from combining with OH− to form Mg(OH)2. At the same time, the composite complexes act as nuclei to adsorb the nearby SO42− and Mg2+ to induce the generation of the 5·1·7 phase.","PeriodicalId":16330,"journal":{"name":"Journal of Materials in Civil Engineering","volume":"37 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147893129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"New Insights into the Effect of Calcium Formate on the Hydration Process of Tricalcium Silicate","authors":"Yimu Wang, Jinqing Jia, Dingming Zhang, Xing Gao","doi":"10.1061/jmcee7.mteng-19409","DOIUrl":"https://doi.org/10.1061/jmcee7.mteng-19409","url":null,"abstract":"In this research, the impact of calcium formate (CF) on the hydration process of tricalcium silicate (C3S, the most abundant component in portland cement) was investigated by setting time test, compressive strength test, isothermal calorimetry, X-ray diffraction (XRD), thermogravimetric analysis (TGA), and scanning electron microscopy energy-dispersive spectroscopy (SEM-EDS). The incorporation of CF led to a decrease in setting times and enhanced early strength of the C3S specimen. Furthermore, the heat release of the C3S sample was increased by the addition of CF. Results from XRD and TGA indicated that the hastening of solidification and the rapid development of initial strength in C3S pastes by CF was not due to its promotion of C3S hydration level. On the contrary, CF impeded the initial hydration process of C3S. However, the study of the hydration level of C3S revealed that the incorporation of CF led to a noticeably greater water-to-silica ratio (H/S) in the calcium silicate hydrate (C─ S─ H) phase, primarily as a result of water molecules infiltrating the C─ S─ H. This elevated H/S ratio in C─ S─ H contributed to a rise in the volume of water utilized throughout the hydration process of C3S for each unit, which stands as the principal factor behind the hastened setting and the initial strength increase observed in C3S paste due to the presence of CF.","PeriodicalId":16330,"journal":{"name":"Journal of Materials in Civil Engineering","volume":"37 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147886304","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}