Construction and Building Materials最新文献

{"title":"Evaluation of electrical resistivity, hydration, and durability against sulfate attack of limestone calcined clay cement (LC3) with various kaolinite content at high-replacement levels","authors":"Fatemeh Arbab ,&nbsp;Amir Tarighat ,&nbsp;Mohsen Ali Shayanfar","doi":"10.1016/j.conbuildmat.2025.140505","DOIUrl":"10.1016/j.conbuildmat.2025.140505","url":null,"abstract":"<div><div>Cement and concrete play a crucial role in modern global infrastructure. The broad availability and low cost of cement production are the primary reasons for its widespread use in construction, contributing to approximately 5–8 % of CO₂ emissions. Using supplementary cementitious materials (SCMs) to substitute a portion of the clinker in cement has proven to be the most effective method for curbing CO₂ emissions in the international cement industry. Limestone calcined clay cement (LC³) permits the substitution of cement with calcined clay and limestone. This study compares the properties of LC³ samples at varying levels of clinker substitution using 11 different kaolinite clays with Portland cement. The results showed that the LC³ samples with high pozzolanic reaction, even with a kaolinite content of 14.96 %, reached a better strength than Portland cement from 7 days onwards. The electrical resistivity of LC³ samples increased with the increase of clinker replacement. At 60 % clinker replacement, the electrical resistivity of LC³ samples at 28 days was between 4.1 and 20 times that of the PC sample. The expansion rate of LC³ mortar samples under sulfate attack was significantly lower than that of the PC sample. These findings suggest that increasing clinker replacement in LC³ samples leads to refined pores, enhanced electrical resistivity, and improved durability against sulfate attack.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"469 ","pages":"Article 140505"},"PeriodicalIF":7.4,"publicationDate":"2025-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143471268","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 thermal and moisture damage mechanism of aerogel slurry reinforced gypsum board under typical climatic conditions in plateau","authors":"Wen Yang ,&nbsp;Chengyan Zhou ,&nbsp;Guanjie Zhang ,&nbsp;Guowei Xu ,&nbsp;Jiaping Liu","doi":"10.1016/j.conbuildmat.2025.140469","DOIUrl":"10.1016/j.conbuildmat.2025.140469","url":null,"abstract":"<div><div>The Qinghai-Tibet Plateau faces challenges in creating a comfortable indoor environment due to its harsh climate. To reduce energy consumption, enhancing the insulation performance of gypsum interiors is crucial. Meanwhile understanding the damage mechanisms of severe weather on building materials is essential. Aerogel particles, known for their excellent thermal properties, are often used as modifiers. However, their high cost and incompatibility with cement-based materials forced this paper to select aerogel slurry as a modified material and prepare a new type of aerogel slurry reinforced gypsum board (ASRGB) and obtain basic thermal and wet physical parameters. It has been demonstrated that increasing the content of aerogel can significantly reduce the thermophysical parameters (up to 63 %), but increase the water absorption and diffusion coefficient (up to 2115 %). ASRGB with high aerogel content has better anti-aging performance than that with low aerogel content. Polystyrene foam (EPS) and Exturded polystyrene foam (XPS) have higher anti-aging performance than rock wool, and foamed cement has the worst anti-aging performance. The impact of ultraviolet radiation on thermal performance is greater than that of freeze-thaw cycles, and both have a greater effect on wet performance than on thermal performance. In general, the recommended content of aerogel in ASRGB is 30 %.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"469 ","pages":"Article 140469"},"PeriodicalIF":7.4,"publicationDate":"2025-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143471267","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":"CSH/PCE nanoparticle as a novel foam stabilizer: Highly efficient interfacial adsorption and enhanced performance in foam concrete","authors":"Zhenxing Du ,&nbsp;Peiyan Liu ,&nbsp;Penggang Wang ,&nbsp;Shuo Jiang ,&nbsp;Yunqiang Shi ,&nbsp;Mengzhuo Sun ,&nbsp;Mingyue Gao ,&nbsp;Hua Fu","doi":"10.1016/j.conbuildmat.2025.140509","DOIUrl":"10.1016/j.conbuildmat.2025.140509","url":null,"abstract":"<div><div>Foam concrete is widely recognized for its lightweight properties, but the inherent instability of foams often leads to structural degradation and collapse. This study introduces calcium-silicate-hydrate (CSH) nanoparticles grafted with polycarboxylate ether (PCE) as a novel foam stabilizer. CSH/PCE nanoparticles enhance interfacial adsorption at the gas-liquid interface, resulting in optimized pore size distribution, reinforced air-void walls, and significantly improved foam stability in foam concrete. Compared to normal foam concrete, the inclusion of CSH/PCE nanoparticles led to a 27 % reduction in water absorption, a 23.1 % increase in thermal insulation performance, and a 38.6 % improvement in mechanical strength. These results demonstrate that CSH/PCE offers an effective solution to the limitations of conventional foam stabilization methods, with significant implications for the development of sustainable, high-performance building materials.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"469 ","pages":"Article 140509"},"PeriodicalIF":7.4,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143465218","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":"Cyclicity estimation of superabsorbent polymer in concretes based on similarity principles","authors":"Chao Yao ,&nbsp;Yinchuan Guo ,&nbsp;Aiqin Shen ,&nbsp;Zhenghua Lyu ,&nbsp;Hansong Wu ,&nbsp;Jinhua Wu","doi":"10.1016/j.conbuildmat.2025.140489","DOIUrl":"10.1016/j.conbuildmat.2025.140489","url":null,"abstract":"<div><div>The cyclicity of superabsorbent polymers (SAP) significantly impact the efficiency and sustainability of crack self-healing for concretes. This study proposed a method to assess the cyclic absorption-release ability of SAP in concretes based on the similarity principles of materials and geometry. The evolution of its properties during cycling was characterized using the tea-bag method. Microstructure, elemental composition, content, and functional groups were analyzed through field emission scanning electron microscope, energy dispersive spectrometry, and Fourier transform infrared spectroscopy. Results demonstrate that the absorption capacity of SAP with different particle sizes showed a rapid then a slow decrease with the increasing wet/dry cycles. The increased swellable volume accelerated the attenuation process, exacerbating ion complexation, and ageing. Despite these changes, SAP exhibited excellent cyclicity owing to its high molecular stability with minor changes in functional groups. It is necessary to consider the matrix space limitation in the estimation process, which can enhance the reliability and availability of SAP durability tests in concretes.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"469 ","pages":"Article 140489"},"PeriodicalIF":7.4,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143465212","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":"Microspheres as a stabilizing element in polyurethane-cork composites","authors":"Monika Kuźnia ,&nbsp;Patrycja Zakrzewska ,&nbsp;Artur Szajding ,&nbsp;Beata Zygmunt-Kowalska ,&nbsp;Agnė Kairytė ,&nbsp;Jurga Šeputytė-Jucikė ,&nbsp;Renata Boris ,&nbsp;Giedrius Balčiūnas","doi":"10.1016/j.conbuildmat.2025.140491","DOIUrl":"10.1016/j.conbuildmat.2025.140491","url":null,"abstract":"<div><div>Rigid polyurethane foam (RPUF) is a commonly used material for thermal insulation in buildings. Recent literature suggests a trend towards incorporating renewable additives in the synthesis of RPUF. For example, cork is a filler that can significantly improve polyurethane foam characteristics, particularly mechanical, thermal and acoustic properties. Conversely, the addition of cork to the polyurethane matrix results in material deformation. This article presents the innovative effect of microspheres as a stabilizing agent for size changes in polyurethane cork composites. Furthermore, the paper aims to describe the synthesis of RPUFs containing cork and microspheres – inorganic spherical beads with high thermal resistance. Unfortunately, the addition of filler can cause deterioration in other parameters, such as dimensional stability. An extensive analysis of the resulting composite is presented, including studies of the foaming process, morphology, physical properties, mechanical properties, and flammability. The incorporation of 10 wt% aluminosilicate microspheres resulted in 24 % higher compressive and tensile strengths, while the same amount of cork reduced the parameters by 52 % and 17 %, respectively. The greatest positive impact on thermal conductivity value was achieved by incorporating 10 wt% aluminosilicate microspheres, i.e. a reduction of 2.5 % compared to the control polyurethane foam. The addition of cork and microspheres increased the early-stage thermal stability by a maximum of 23 ºC and 5 ºC, respectively, while in conjunction with both fillers this was increased by a maximum of 3 ºC when 7.5 wt% cork and 2.5 wt% microspheres were used.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"469 ","pages":"Article 140491"},"PeriodicalIF":7.4,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143465215","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":"Effect of inorganic coating-modified steel reinforcement on properties of sulfoaluminate cement-based non-autoclaved aerated concrete slabs subjected to sodium chloride attack, sodium sulfate attack, and freeze-thaw cycles","authors":"Bao Xu ,&nbsp;Chang Chen ,&nbsp;Shaowu Jiu ,&nbsp;Yanxin Chen ,&nbsp;Yan Liu","doi":"10.1016/j.conbuildmat.2025.140484","DOIUrl":"10.1016/j.conbuildmat.2025.140484","url":null,"abstract":"<div><div>To address the corrosion challenges associated with steel reinforcement in non-autoclaved aerated concrete slabs (NAACSs), zinc silicate-potassium silicate modified with aluminum powder and muscovite-potassium silicate modified with zinc powder were employed to modify steel reinforcement, while novel NAACSs based on sulfoaluminate cement were fabricated. The degradation trends in physical characteristics, mechanical properties, and morphological changes of the NAACSs were investigated under the erosion effects of Cl^<img>, SO₄^2<img>, and freeze-thaw cycles. The results demonstrated that the mass loss and relative dynamic modulus of elasticity reduction of the NAACS containing muscovite-potassium silicate modified with zinc powder were reduced by up to 42.8 % and 26.3 %, respectively. Moreover, the bond strengths of the NAACSs were 48.1 %-92.3 % higher prior to erosion and 12.5 %-32.1 % higher post-erosion, respectively. The effects of various erosion conditions on bond strength were ranked as follows: SO₄^2<img> &gt; freeze-thaw cycles &gt; Cl^<img>. Both inorganic coatings effectively inhibited the corrosion of steel reinforcement by erosion media, thereby enhancing the durability of the NAACSs.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"469 ","pages":"Article 140484"},"PeriodicalIF":7.4,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143465214","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":"Mechanistic study of the effect of aggregate surface wettability on mortar performance and interfacial strength","authors":"Chengyan Hou ,&nbsp;Haibo Zhang ,&nbsp;Hucheng Chai ,&nbsp;Chunwei Wang ,&nbsp;Xu Yang","doi":"10.1016/j.conbuildmat.2025.140498","DOIUrl":"10.1016/j.conbuildmat.2025.140498","url":null,"abstract":"<div><div>Aggregates account for approximately 65–75 % of the concrete volume, significantly influencing its performance. However, the effect of aggregate surface wettability on concrete performance is frequently neglected. In this study, 12 types of aggregates were prepared with surface contact angles ranging from 34.0° to 77.9°, using a silane coupling agent (SCA) to modify quartz sand. The effects of contact angle on the fluidity and mechanical performance of mortar, as well as the performance of the interface transition zone (ITZ), were investigated. Further analysis explored the mechanism by which the contact angle affects mortar performance. The results showed that the optimal performance of mortar was achieved at a contact angle of 60.8°, resulting in flexural and compressive strengths of 8.8 MPa and 59.1 MPa, respectively-representing increases of 9 % and 19.5 % compared to unmodified aggregates. Additionally, microscopic tests confirmed that the mechanical performance of the ITZ improved by 53.2 %, while its porosity decreased by 19.2 %, leading to enhanced interfacial bonding performance. However, when the contact angle exceeds 60.8°, the mortar performance gradually decreases. Based on these findings, this study proposed a mechanism for the influence of aggregate surface contact angle on mortar performance, providing a new way to improve the quality of cement concrete and offering important theoretical significance and practical value.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"469 ","pages":"Article 140498"},"PeriodicalIF":7.4,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143465217","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":"Enhancing the strength of carbonated γ-dicalcium silicate by internal carbonation curing","authors":"Kaiwei Ye ,&nbsp;Longxiang Yang ,&nbsp;Jinyan Zeng ,&nbsp;Jiajia Tian ,&nbsp;Fengjuan Zeng ,&nbsp;Guotian Ye ,&nbsp;Yuandong Mu","doi":"10.1016/j.conbuildmat.2025.140512","DOIUrl":"10.1016/j.conbuildmat.2025.140512","url":null,"abstract":"<div><div>Carbonation curing imparts high early strength and substantial CO₂ sequestration to carbonatable calcium silicate cement. However, the insufficient carbonation in the interior of the carbonated cement paste negatively impacts its mechanical properties. This study presents a novel method of internal carbonation curing for γ-dicalcium silicate (C₂S(γ)) using porous lightweight zeolite aggregate saturated with ammonium bicarbonate (NH₄HCO₃) solution. The findings show that NH₄HCO₃ rapidly reacts with C₂S(γ) to produce calcium carbonates, confirming the viability of NH₄HCO₃ as an internal curing agent. Mechanical property tests demonstrated that specimens containing zeolite pre-soaked in 1.5 mol/L NH₄HCO₃ solution achieved the highest compressive strength after carbonation and extended curing, with a 33.36 MPa increase over the control. Microstructural analysis revealed that internal curing with NH₄HCO₃ solution enhanced carbonation extent around zeolite. The secondary calcium carbonate (CaCO₃ (II)) formed by internal curing strengthens the framework established by primary calcium carbonate (CaCO₃ (I)) from external carbonation, thus bolstering the overall strength.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"469 ","pages":"Article 140512"},"PeriodicalIF":7.4,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143471266","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 solidification/stabilization of Cu(II) and Cd(II)-contaminated soil by fly ash-red mud based geopolymer","authors":"Haojie Hao ,&nbsp;Xiaofeng Liu ,&nbsp;Xiaoqiang Dong ,&nbsp;Yufeng Liu ,&nbsp;Jiangshan Li ,&nbsp;Jiashi Li ,&nbsp;Xin Xu ,&nbsp;Shiqi Chang","doi":"10.1016/j.conbuildmat.2025.140515","DOIUrl":"10.1016/j.conbuildmat.2025.140515","url":null,"abstract":"<div><div>The preparation of geopolymer for solidification/stabilization of heavy metal contaminated soils using industrial solid waste was a sustainable method. In this study, a binary geopolymer curing agent was synthesized from red mud and fly ash for the treatment of copper- and cadmium- contaminated soils. The changes in the properties of the cured soil were investigated by analyzing compressive strength, permeability coefficient, pH value, toxicity leaching, and the chemical forms of heavy metals. These parameters were examined under varying amounts of curing agent and curing time. The solidification mechanism of contaminated soil was revealed by microscopic experiments such as X-ray diffraction (XRD), infrared spectroscopy (FTIR), scanning electron microscope with energy dispersive X-ray spectroscopy (SEM-EDS). The results showed that geopolymer could significantly improved the mechanical properties and environmental safety of contaminated soil. Compressive strengths of Cu and Cd contaminated soils after 28d of curing with 30 % geopolymer were 1.27 and 1.44 MPa, the permeability coefficients were 4.2 and 3.8⁻⁶cm/s, and toxic leaching amounts of Cu²⁺ and Cd²⁺ were 4.8 and 0.21 mg/L, and pH values were 10.9 and 10.6, respectively. Geopolymer gel structures not only filled the voids between soil particles but also physically encapsulated, chemically bonded, precipitated and ion-exchanged to achieve solidification/stabilization of contaminated soils. This research provided a new technology for the management of heavy metal contaminated soil and promoted the sustainable use of industrial solid waste.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"469 ","pages":"Article 140515"},"PeriodicalIF":7.4,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143465213","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":"Flexural property of eco-friendly timber beams strengthened with ECC layer","authors":"Songqiang Wan ,&nbsp;Hongbo Xiao ,&nbsp;Zhenliang Liu ,&nbsp;Jingli Yang ,&nbsp;Chunling Yan ,&nbsp;Long Liu ,&nbsp;Xianchao Zheng ,&nbsp;Tengfei Xie ,&nbsp;Chenjie Hao ,&nbsp;Han Song ,&nbsp;Junhua Guo ,&nbsp;Xingyao Wang","doi":"10.1016/j.conbuildmat.2025.140468","DOIUrl":"10.1016/j.conbuildmat.2025.140468","url":null,"abstract":"<div><div>This research presents a new engineering cement-based composite (ECC) reinforced timber beam structure to enhance the flexural bearing capacity and deformation capacity of eco-friendly timber beams. Nine test beams were tested under static load, and the test variables included steel plate setting, ECC reinforcement position and ECC layer thickness. The effects of test variables on the flexural property of ECC-reinforced timber beams were evaluated from the failure mode, load-deflection curve, ultimate load, stiffness, ductility and load-strain curve, indicating that the employment of ECC on strengthening timber beams is an effective reinforcement method for significantly improving the flexural bearing capacity and deformation capacity of timber beams. Compared with other reinforcement methods, the configuration of ECC layers at the top and bottom has a more notable effect on enhancing the flexural properties of timber beams. Compared with WB-1, the ultimate load, stiffness and displacement ductility coefficient of EWB-B10-T10 increased by 47.29 %, 92.17 % and 98.66 %, respectively. When the thickness of the ECC layer is the same, it is more effective to configure the ECC layer at the bottom than at the top; when the reinforcement position is the same, increasing the thickness of the ECC layer has a positive effect on the flexural performance of the beam. At the same time, a calculation model for the flexural bearing capacity of ECC-reinforced beams was proposed based on the hypothesis, and the flexural bearing capacity predicted by the calculation model is in good agreement with the test results. Finally, the CO₂ emissions of the structure were calculated using the life cycle assessment method (LCA) and compared with other composite structures. This comprehensive evaluation highlights the environmental advantages of ECC-reinforced beams, and lays a solid foundation for future research and application in sustainable buildings.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"469 ","pages":"Article 140468"},"PeriodicalIF":7.4,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143465216","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}