Construction and Building Materials最新文献

{"title":"Corrigendum to “Effect of fly ash, basalt fibre and attapulgite nanoclay on the fresh properties, rheology and shrinkage behaviour of printable concrete” [Constr. Build. Mater. 508 (2026) 145123]","authors":"Sandipan Kaushik , Mohammed Sonebi , Giuseppina Amato , Arnaud Perrot","doi":"10.1016/j.conbuildmat.2026.145633","DOIUrl":"10.1016/j.conbuildmat.2026.145633","url":null,"abstract":"","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"516 ","pages":"Article 145633"},"PeriodicalIF":8.0,"publicationDate":"2026-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147387166","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":"Experimental testing and mesoscale modelling of the bond behaviour of CTRM-strengthened concrete: Effect of multi-layer textile arrangement and concrete heat damage","authors":"Xuan Wang ,&nbsp;Yiqun Yin ,&nbsp;Tianlin Zhao ,&nbsp;Shigang Luo ,&nbsp;Zihua Zhang","doi":"10.1016/j.conbuildmat.2026.145706","DOIUrl":"10.1016/j.conbuildmat.2026.145706","url":null,"abstract":"<div><div>Carbon Textile Reinforced Mortar (CTRM) is increasingly preferred for retrofitting concrete structures. However, the bond behaviour of multi-layer textiles applied to heat-damaged substrates remains unexplored. Previous studies have often overlooked the critical interaction between textile arrangement and substrate degradation caused by high temperatures. To address this gap, this study combines experimental testing with numerical modelling. Single-lap shear tests were conducted on 36 CTRM specimens and 18 Carbon Fibre Reinforced Polymer (CFRP) specimens bonded to concrete substrates exposed to ambient temperatures, 500 °C, and 700 °C. The study specifically evaluated the effectiveness of two multi-layer arrangements: overlapped (Type I) and separated (Type II). Additionally, a 2D mesoscale finite element model was developed to investigate the internal damage mechanisms. The experimental results demonstrate that the textile configuration influences the stress transfer mechanism. While Type I shows slightly higher peak loads, Type II exhibits superior ductility and energy dissipation. This advantage is attributed to the intermediate mortar layer in Type II, which effectively mitigates stress concentrations and prevents premature matrix splitting. Regarding the heat impact, a distinct transition in failure modes occurs at 700 °C: severe substrate degradation shifts the failure from interfacial debonding to deep concrete peeling. This leads to a significant increase in effective bond length. Compared to CFRP, CTRM demonstrates better physicochemical compatibility with heat-damaged substrates, providing a more resilient solution with higher fibre utilisation. Finally, the mesoscale simulation further confirmed that the separated arrangement reduces the peak shear stress at the interface.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"516 ","pages":"Article 145706"},"PeriodicalIF":8.0,"publicationDate":"2026-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147387226","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 steel fiber content and pre-setting pressure on the dynamic compressive behavior of UHPC","authors":"Yongze Li ,&nbsp;Chunxiao Zhang ,&nbsp;Aiguo Dang ,&nbsp;Jize Mao ,&nbsp;Jingbiao Liu ,&nbsp;Gang Wang ,&nbsp;Shaohua Cao ,&nbsp;Junlei Wang ,&nbsp;Jiaqi Huang","doi":"10.1016/j.conbuildmat.2026.145605","DOIUrl":"10.1016/j.conbuildmat.2026.145605","url":null,"abstract":"<div><div>Owing to the high strength, high toughness and excellent durability of ultra-high performance concrete (UHPC), it can effectively resist the structural damage caused by strong impact and avoid structural instability. The static and dynamic performance of UHPC can be effectively improved by the combination of fiber reinforcement and preloading technology during its preparation. In this paper, the static mechanical properties and dynamic compression performance of UHPC were systematically tested by setting different volume steel fiber contents and different preloading loads. The stress–strain relationship and corresponding mechanical property parameters of UHPC under impact velocities of 3.2–17.5 m/s were determined, and the damage mode and failure mechanism of the UHPC samples were analyzed. In addition, the effects of the preloading load and steel fiber content on the evolution of cracks in UHPC at a low strain rate were characterized by micro-CT three-dimensional scanning technology. Moreover, the dynamic failure of the UHPC samples was recorded in detail by a high-speed camera, and the evolution of crack initiation, propagation and final failure was clearly determined. Finally, on the basis of the experimental data and empirical model, a DIF model of UHPC dynamic compression performance suitable for axial compressive strength in the range of 105.1 MPa to 239 MPa was constructed. The results of this study provide new solutions and ideas for the development and application of UHPC.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"516 ","pages":"Article 145605"},"PeriodicalIF":8.0,"publicationDate":"2026-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147387172","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 binder and mixture performance in crumb rubber asphalt modified with Sasobit","authors":"Diego Caccavo ,&nbsp;Marco Iannone ,&nbsp;Isidoro Russo ,&nbsp;Anna Maria Petrucci ,&nbsp;Raffaele Petrucci ,&nbsp;Gianluca Genovese ,&nbsp;Ciro Caliendo ,&nbsp;Gaetano Lamberti","doi":"10.1016/j.conbuildmat.2026.145674","DOIUrl":"10.1016/j.conbuildmat.2026.145674","url":null,"abstract":"<div><div>The accumulation of waste tires and their environmental impact is a serious global issue. Incorporating Crumb Rubber (CR) into asphalt mixtures allows this waste to be recycled while improving pavement performance, but it also increases production temperatures, energy use, and emissions. Warm Mix Asphalt (WMA) additives can mitigate this drawback, enabling more sustainable mixtures. This study presents laboratory investigation of the rheological properties and mechanical performance of CR–modified asphalt binder and mixtures obtained by wet process and containing Sasobit as a WMA additive. The bitumen investigation employed penetration, softening point, viscosity, and dynamic shear rheometer tests. Results showed that CR increased binder stiffness, as evidenced by reduced penetration and higher softening point, while Sasobit further contributed to lowering penetration at low temperatures but also reduced viscosity at high temperatures, thus improving workability. The formulation with 15 % CR and 3 % Sasobit (15 %CR–3 %S) emerged as the optimal compromise, achieving a high-temperature Performance Grade (PG 82) without excessive stiffness. The dynamic (complex) modulus and fatigue resistance at different temperatures and load frequencies of the 15 %CR CR–3 %S modified asphalt mixture, intended for use as the wearing course of road pavements, were evaluated through 4-point bending tests. Moreover, dynamic creep tests were conducted to assess its rutting resistance. Compared with the unmodified asphalt mixture, the modified one generally exhibited a higher complex modulus, improved fatigue resistance, and enhanced rutting resistance. These results indicate that combining CR with Sasobit enhances binder rheology and asphalt mixture performance while supporting lower-temperature production, contributing to the development of more sustainable asphalt pavements.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"516 ","pages":"Article 145674"},"PeriodicalIF":8.0,"publicationDate":"2026-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147387146","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":"Stress corrosion behavior and post-corrosion mechanical properties of CM490 steel in simulated marine splash zone environment","authors":"Hongbo Liu ,&nbsp;Jiakai Xu ,&nbsp;Yuechen Xiong ,&nbsp;Longxuan Wang ,&nbsp;Jijian Lian","doi":"10.1016/j.conbuildmat.2026.145699","DOIUrl":"10.1016/j.conbuildmat.2026.145699","url":null,"abstract":"<div><div>To address the issue of substantial corrosion-stress coupling in the splash zone of marine floating photovoltaic (FPV) mooring systems, this study systematically investigates the stress-corrosion behavior of CM490 anchor chain steel and the evolution of its mechanical properties following corrosion. The investigation was conducted under simulated multi-environmental coupling conditions, including salt spray, ultraviolet (UV) radiation, and rainwater; moreover, accelerated corrosion tests with multiple stress levels were designed and performed. Through a combination of microscopic morphology analyses, three-dimensional pit scanning, mechanical property testing, and finite element simulations, the study elucidates the mechanism whereby stress significantly accelerates corrosion and its impact on material performance degradation. Under conditions of 0.3<em>σₛ</em> (yield stress) and 0.6<em>σₛ</em>, the corrosion depth of the steel after 180 d increased by 15.7 % and 23.6 %, respectively, relative to that in the stress-free state. Moreover, time-varying models for the mass reduction and bearing capacity reduction coefficients showed that the rate of bearing capacity degradation exceeded that of mass loss; additionally, the degradation was more pronounced at higher stress levels. Furthermore, a quantitative mapping relationship between the uniform corrosion depth and maximum pitting depth was constructed. Subsequently, a multi-stress, coupled residual-strength model factoring the stress-correction factor was proposed, and a time-varying expression for the bearing capacity prediction reduction coefficient was derived. Overall, this study provides theoretical basis and data support for the durability design and service life prediction of anchor chain steel utilized in marine mooring systems.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"516 ","pages":"Article 145699"},"PeriodicalIF":8.0,"publicationDate":"2026-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147387092","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":"Contrasting mechanisms of dodecyltrimethylammonium chloride versus tetramethylammonium chloride in the crystallization of calcium sulfate hemihydrate whiskers from titanium gypsum","authors":"Zuolin Wang ,&nbsp;Jianping Zhu ,&nbsp;Qixiang Wu ,&nbsp;Yuhan Wang ,&nbsp;Songhui Liu ,&nbsp;Xuemao Guan ,&nbsp;Jiayuan Ye","doi":"10.1016/j.conbuildmat.2026.145723","DOIUrl":"10.1016/j.conbuildmat.2026.145723","url":null,"abstract":"<div><div>The substantial accumulation of industrial by-product gypsum, primarily from China's power generation, phosphate fertilizer, and fluorine chemistry sectors, poses a significant environmental challenge. To address this issue and valorize the waste, this study provides, to the best of our knowledge, the first systematic mechanistic comparison of successfully synthesized high-aspect-ratio calcium sulfate hemihydrate whiskers (CSHW) from titanium gypsum (TMG) via a hydrothermal method, using dodecyltrimethylammonium chloride (DTAC) or tetramethylammonium chloride (TMAC) as crystal modifiers. The adsorption behaviors and underlying growth mechanisms were systematically investigated through integrated experimental and theoretical approaches. Optimal aspect ratios were achieved at 0.50 wt% DTAC and 0.75 wt% TMAC, corresponding to significant enhancements of 107.2 % (reaching 71.24) and 48.9 % (reaching 51.19), respectively. Mechanistic analyses revealed that the (CH₃)₃N⁺ groups of both surfactants chemically adsorb onto the side facets, inhibiting radial growth and promoting axial elongation. Crucially, DTAC, with its dodecyl chain, forms hemi-micellar or bilayer adsorption structures—a capability lacking in TMAC—which endows the CSHW with markedly enhanced hydrophobicity and a higher surface potential, both of which are crucial for improving interfacial compatibility and reinforcement efficiency in composite materials.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"516 ","pages":"Article 145723"},"PeriodicalIF":8.0,"publicationDate":"2026-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147387148","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 enhanced arsenic removal from arsenic-containing desulfurization gypsum coupled with preparation of α-hemihydrate gypsum","authors":"Wang Du ,&nbsp;Bo Hu ,&nbsp;Liping Ma ,&nbsp;Quxiu Dai ,&nbsp;Binbin He ,&nbsp;Jie Yang ,&nbsp;Xia Yin ,&nbsp;Jingxian Yang ,&nbsp;Kai Huang","doi":"10.1016/j.conbuildmat.2026.145702","DOIUrl":"10.1016/j.conbuildmat.2026.145702","url":null,"abstract":"<div><div>Arsenic-containing desulfurization gypsum (ADG) is a typical solid waste in the metallurgical industry, and its resource utilization is restricted by the high toxicity and difficulty in removal of arsenic. In this work, using ADG as the raw material, the effects of pressurized hydrothermal conditions on the conversion of α-hemihydrate gypsum (α-HH) and simultaneous arsenic removal were systematically investigated. The results showed that hydrothermal temperature, reaction time, sulfuric acid concentration, and liquid-solid ratio (L/S) all had significant impacts on the crystal form of the product and arsenic removal efficiency. Under the conditions of 140 °C, 5 % H₂SO₄, reaction duration of 120 min, and L/S of 7:1, gypsum could be completely converted into dense columnar α-HH, and the arsenic removal rate reached 95.7 %. H⁺ could directionally destroy the lattice of Ca-As compounds, enabling arsenic to migrate to the liquid phase in a dissolved state; meanwhile, the phase transformation from calcium sulfate dihydrate (DH) to α-HH was completed simultaneously during the dissolution-recrystallization process. The arsenic removal process was controlled by chemical reaction in the initial stage and then turned into diffusion control. The arsenic removal process conformed to the Avrami model (<span><math><mrow><mo>−</mo><mi>ln</mi><mo>(</mo><mn>1</mn><mo>−</mo><mi>c</mi><mo>)</mo><mo>=</mo><mn>8.47</mn><mi>exp</mi><mrow><mfenced><mrow><mo>−</mo><mn>21080</mn><mo>/</mo><mi>RT</mi></mrow></mfenced></mrow><msup><mrow><mi>t</mi></mrow><mrow><mn>0.47</mn></mrow></msup></mrow></math></span>), with an activation energy of 21.1 kJ/mol. Aluminum sulfate crystal modifier could effectively regulate the crystal form of α-HH and improve arsenic removal efficiency. This study reveals the action law of pressurized hydrothermal conditions on α-HH conversion and simultaneous arsenic removal as well as the characteristics of mass transfer control, providing a theoretical basis for the synergistic high-value and harmless utilization of ADG.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"516 ","pages":"Article 145702"},"PeriodicalIF":8.0,"publicationDate":"2026-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147387222","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":"Gradient organic–inorganic interfacial engineering for durable marine concrete repair under coupled effects of loading and wet-dry cycling","authors":"Hao Liu ,&nbsp;Jun Ni ,&nbsp;Haifeng Li ,&nbsp;Haoliang Huang ,&nbsp;Duojiong Sun ,&nbsp;Jie Hu ,&nbsp;Jiangxiong Wei ,&nbsp;Qijun Yu","doi":"10.1016/j.conbuildmat.2026.145681","DOIUrl":"10.1016/j.conbuildmat.2026.145681","url":null,"abstract":"<div><div>Concrete repairs in tidal-zone structures suffer rapid degradation due to the coupled effects of compressive loading and seawater wet–dry cycling, leading to interfacial debonding and accelerated chloride ingress. A gradient organic–inorganic interfacial strategy was developed by incorporating low-viscosity waterborne epoxy resin (WER) into a cement-based repair mortar. NMR results confirmed that WER (200 mPa·s) penetrated up to 9.4 mm into the substrate-nearly 50 % deeper than higher-viscosity systems-forming a continuous hybrid interface. This gradient interface markedly improved durability after 180 days of exposure, the WER-modified specimens retained 70 % of the initial tensile bond strength, whereas the reference specimens exhibited reductions up to 50 % under a stress level of 0.5 of the ultimate compressive strength of the specimens. Chloride penetration depth was reduced by 2–5 mm, and nanoindentation revealed a 62 % vs. 27 % reduction in interfacial modulus for the control and WER systems, respectively. These results demonstrate that constructing a gradient interface using low-viscosity WER effectively suppresses stress-assisted ion migration and delays interfacial deterioration, offering a promising approach for durable marine concrete repair.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"516 ","pages":"Article 145681"},"PeriodicalIF":8.0,"publicationDate":"2026-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147387224","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":"Efflorescence and strength effects of different ambient regimes of curing fly ash – based geopolymer concrete","authors":"A. Naghizadeh ,&nbsp;L. Tchadjie ,&nbsp;F. Solomon ,&nbsp;S.O. Ekolu ,&nbsp;C. Wu ,&nbsp;M. Welman-Purchase","doi":"10.1016/j.conbuildmat.2026.145722","DOIUrl":"10.1016/j.conbuildmat.2026.145722","url":null,"abstract":"<div><div>This study investigated the effects of different ambient curing regimes, alkali activator composition, and ground granulated blast – furnace slag (GGBS) incorporation, upon the efflorescence deterioration of ambient – cured fly ash – based geopolymer concrete. Two blends of the binary activator comprising sodium silicate and sodium hydroxide solutions, made at different silicate moduli of SiO₂/Na₂O = 1.31 and 1.43, were used to prepare fly ash and fly ash – GGBS geopolymer concretes. The curing conditions employed comprised air – tight sealing, water – immersion, and open – air exposure of samples. Efflorescence deterioration was evaluated along with mechanical properties consisting of workability and compressive strength. The occurrence of efflorescence was assessed by conducting qualitative surface observations and quantitative mass measurements, along with analytical characterization of both the effloresced geopolymer concrete and the efflorescence salt that formed. Results showed that mixtures cured under sealed conditions consistently achieved higher compressive strengths and exhibited reduced salt crystallization, whereas air curing led to severe efflorescence deterioration. The lower silicate activator and/or higher GGBS content enhanced strength development, reduced efflorescence severity, and improved microstructural densification. Incorporation of 30–40 % GGBS effectively mitigated efflorescence formation under water – curing of geopolymer concretes.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"516 ","pages":"Article 145722"},"PeriodicalIF":8.0,"publicationDate":"2026-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147387228","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":"Mechanical properties of vertically and horizontally cored clay bricks and masonry ties used in double brick walls","authors":"Sarkar Noor-E-Khuda ,&nbsp;Stefan Brestovac","doi":"10.1016/j.conbuildmat.2026.145696","DOIUrl":"10.1016/j.conbuildmat.2026.145696","url":null,"abstract":"<div><div>Post-COVID-19, Western Australia (WA) has recorded an increased demand for single and double-story residential homes due to record-high migration and mining activities in the state. The majority of these homes are constructed using the double brick (DB) construction technique, where a combination of vertically cored (VCore) and horizontally cored (HCore) clay bricks is used. A review of the literature reveals that no research data is available on the material properties of the VCore and HCore bricks, mortar, masonry and masonry wall ties, which are extensively used in WA. A systematic material-level experimental investigation is thus carried out to determine their material properties. A total of ten different material properties tests were conducted, including mortar compressive and flexural strength, dimensional tolerance, compressive strength and modulus of rupture of masonry unit, compressive and flexural tensile strength of masonry piers, tensile and compressive strength of wire ties, and masonry tie pull-out bond strength using two test methods. All tests were performed according to relevant Australian and international standards. It is found that the performance of the bricks and masonry varied with changes in the arrangement of cores.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"516 ","pages":"Article 145696"},"PeriodicalIF":8.0,"publicationDate":"2026-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147387088","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}