Construction and Building Materials最新文献

{"title":"Compressive fatigue resistance and damage evolution model of foamed polyurethane grouting materials under different loading characteristics and densities","authors":"Wang Pan ,&nbsp;Yongbo Wang ,&nbsp;Weiliang Gao ,&nbsp;Chao Zhang ,&nbsp;Cuixia Wang ,&nbsp;Hongyuan Fang ,&nbsp;Pengjia Zhu ,&nbsp;Fuming Wang","doi":"10.1016/j.conbuildmat.2025.140514","DOIUrl":"10.1016/j.conbuildmat.2025.140514","url":null,"abstract":"<div><div>Foamed polyurethane grouting materials are susceptible to progressive fatigue damage under traffic loads after rehabilitation for highways and railways. This work systematically investigated compressive fatigue performance, focusing on density, stress level, and loading frequency. Additionally, a fatigue damage evolution model was developed. The test results revealed lower loading frequencies, stress levels, and densities led to higher fatigue life. Stress level and loading frequency had minimal impact on the initial dynamic stiffness, which increased following a power-law relationship with increasing density. In addition, the initial dynamic stiffness was approximately 1.58 times that of the quasi-static stiffness. Adjustment, stable change, and failure stages characterized stiffness damage evolution curves. Stress level and loading frequency had a limited impact on stiffness damage evolution compared to density. At failure, stiffness damage exceeded 0.3. The proposed compressive fatigue damage evolution model, incorporating density and loading characteristics, demonstrated strong agreement with test results, with mean constitutive curve errors below 6.61 %. This work provides a theoretical basis and scientific guidance for further numerical analyses and engineering applications.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"469 ","pages":"Article 140514"},"PeriodicalIF":7.4,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143479929","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":"Viscoelasticity stage evolution characteristics and multiphase microstructure of aged crumb rubber-modified asphalt","authors":"Ruipu Chen ,&nbsp;Long Chen ,&nbsp;Peng Hu ,&nbsp;Hongzhou Zhu ,&nbsp;Li Ou","doi":"10.1016/j.conbuildmat.2025.140531","DOIUrl":"10.1016/j.conbuildmat.2025.140531","url":null,"abstract":"<div><div>Owing to the complex composition of the internal structures of aged crumb rubber-modified asphalt (CRMA), the current understanding of its aging properties and mechanism is lacking. Therefore, this study used the Christensen–Anderson–Marasteanu model, established the master curves of the complex moduli and phase angles of aged CRMA samples, and analyzed the evolution of their viscoelastic properties. Moreover, gel permeation chromatography and scanning electron microscopy were used to characterize the microscopic characteristics of the asphalt and crumb rubber modifier (CRM) phases of the CRMA samples. In aging, the evolution process of the complex modulus and phase angles of CRMAs demonstrated three stages in the low-frequency domain. With the degradation of the CRM, the plateau in the master curves of the phase angles gradually disappeared and the slopes of the Han curves gradually increased. The plateau of phase angle and slope of the Han curve were used as indices to evaluate the degradation of the CRM in the aged CRMA. The microscopic tests demonstrated that the further degradation effect of the CRM degradation products decreased the weight-average molecular weight of the aged CRMA. In addition, the degradation of the CRM probably affected the formation of asphaltene and reduced its content. The CRM of the unaged CRMA exhibited a fluffy structure similar to that of a sponge. As the aging time increased, the surface of the CRM tended to be smooth, the pore structure disappeared, and finally, the fluffy structural form of the CRM disappeared.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"469 ","pages":"Article 140531"},"PeriodicalIF":7.4,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143480039","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":"Temperature and contact states of hot-recycled asphalt mixing at a non-thermal equilibrium condition based on discrete element method","authors":"Jiangyu Liu ,&nbsp;Quan Liu ,&nbsp;Long Yin ,&nbsp;Jiantao Wu","doi":"10.1016/j.conbuildmat.2025.140526","DOIUrl":"10.1016/j.conbuildmat.2025.140526","url":null,"abstract":"<div><div>The mixing of hot recycled asphalt mixture (HRAM) plays a critical role in its performance, particularly in non-uniform temperature environments and high RAP content scenarios. Therefore, it is imperative to investigate the mixing process of HRAM to achieve high-quality production of HRAMs. In this study, the DEM method was employed to simulate the mixing process of HRAMs with predetermined RAP temperatures of 353 K, 373 K, and 393 K, and varying RAP contents at 20 %, 40 %, and 60 %. Statistical analysis of temperature distribution was conducted. Additionally, for representation of particle contact state, contact number statistics and coordination number indicators were introduced. The study revealed that with increasing mixing time, the temperature distribution of asphalt mixture particles gradually concentrated and the average temperature decreased. In all cases examined in this study, a turning point in the temperature field distribution was observed at approximately 50 seconds. Complete thermal equilibrium was not found in a limited mixing time of 90 seconds. The interaction between particles underwent significant changes during the initial stages of mixing and stabilized in the final state, which was influenced by both the RAP content and predetermined RAP temperatures. The ANN (Average Nearest Neighbour Analysis) index introduced can serve as a crucial indicator to characterize the mixing of hot-recycled asphalt mixtures.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"469 ","pages":"Article 140526"},"PeriodicalIF":7.4,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143474809","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":"Investigation of performance evolution in recycled asphalt mixtures: The impact of virgin and RAP binder blending","authors":"Mingchen Li ,&nbsp;Jiang Yuan ,&nbsp;Tian Jin ,&nbsp;Weiying Wang ,&nbsp;Yiren Sun ,&nbsp;Huailei Cheng","doi":"10.1016/j.conbuildmat.2025.140519","DOIUrl":"10.1016/j.conbuildmat.2025.140519","url":null,"abstract":"<div><div>Hot recycled asphalt mixtures not only effectively repurpose reclaimed asphalt pavement (RAP) but also deliver performance that rivals conventional hot-mixed asphalt mixture. This remarkable capability has facilitated their widespread application in practical engineering projects. The design process for hot recycled asphalt mixtures is referenced to hot-mixed asphalt mixtures. When evaluating the performance of hot recycled asphalt mixtures, it is generally required to refer to the test protocols for conventional hot-mixed asphalt mixtures, including the conditioning time prior to performance testing. However, the phenomenon of diffusion and blending between virgin and RAP binders in the recycled mixtures introduces a level of instability in performance following the mixing and compaction processes. This instability can result in significant inaccuracies in performance evaluation results. Therefore, it is essential to clarify the impact of the degree of blending(DOB) between virgin and RAP asphalt on the performance of recycled mixtures to prevent misestimation of their performance. For this purpose, the present study selected three different sources of RAP to prepare nine groups of recycled mixtures with varying RAP content, and analyzed the variation of the DOB between virgin and RAP asphalt, as well as the performance of the recycled mixtures after different conditioning times. Results indicated that the degree of blending between virgin and RAP asphalt in the recycled mixtures continued to increase after the forming process until full blending was achieved. The time required for full blending is influenced by the RAP content, the aging level of RAP binders, and the gradation variability of the mixture. The DOB between virgin and RAP asphalt significantly influences the high-temperature performance, low-temperature performance, and water stability of the mixtures.This variation can cause the properties of the designed recycled mixtures to deviate from expectations. Therefore, it is advisable to conduct performance testing of the recycled mixtures only after achieving full blending between the virgin and RAP asphalt, ensuring more accurate evaluations. Finally, to facilitate this process, a predictive model has been established to estimate the time required for the full blending of virgin and RAP asphalt in recycled mixtures.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"469 ","pages":"Article 140519"},"PeriodicalIF":7.4,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143474810","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":"Enhanced BiVO4 photocatalyst anchored on construction waste bricks powder for efficient formaldehyde and methylene blue degradation","authors":"Liguang Xiao,&nbsp;Yiming Wang,&nbsp;Junlin Yan,&nbsp;Zhenqiang Duan,&nbsp;He Han,&nbsp;Dawei Jiang","doi":"10.1016/j.conbuildmat.2025.140536","DOIUrl":"10.1016/j.conbuildmat.2025.140536","url":null,"abstract":"<div><div>With the increasing accumulation of construction waste and organic pollutants, efficient treatment methods are urgently needed. This study reports the hybridisation of construction waste bricks (CWB) with BiVO₄ (BVO) using a hydrothermal method to synthesise a novel photocatalytic material. Significant improvements in photocatalytic performance of the BVO/CWB-11 composite are seen to address charge carrier recombination in BVO. With a lower <em>E</em>_<em>g</em> of 2.18 eV and an absorption edge extending to 577 nm, this composite can enhance visible light absorption and suppress electron hole recombination. The evidence for this includes reduced photoluminescence intensity showing the longer carrier lifetime and also the enhanced transient photocurrent response. Under simulated visible light, BVO/CWB-11 gives degradation efficiencies for methylene blue (MB) and formaldehyde (CH₂O) of 95.66 and 77.85 %, respectively, which are 1.8 and 1.37 times that of pure BVO. The incorporation of CWB not only provides a low-cost recycling option for construction waste but also offers an alternative approach to the treatment of MB and CH₂O removal. This work provides a stepping stone towards the application of BVO-based photocatalysts in environmental remediation.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"469 ","pages":"Article 140536"},"PeriodicalIF":7.4,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143474915","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":"Effect of boron doping and cooling condition on polymorph and early strength of dicalcium silicate","authors":"Xiaofei Wang ,&nbsp;Zhenbin Xie ,&nbsp;Zhen Huo ,&nbsp;Qiao Shi ,&nbsp;Hongjie Luo ,&nbsp;Shidong Ji","doi":"10.1016/j.conbuildmat.2025.140508","DOIUrl":"10.1016/j.conbuildmat.2025.140508","url":null,"abstract":"<div><div>In order to prepare dicalcium silicate (Ca₂SiO₄, C₂S) with high hydration activity, the effects of boron doping and cooling condition on the early hydration performance of synthesized dicalcium silicate were investigated. The results showed that approximately 20 % of the α′_H-C₂S with high hydration activity existed in clinkers sintered with the addition of boric acid, which was negligibly affected by cooling conditions. In this study, even in the clinker prepared by the slow cooling method and without boron-doping, no water-nonreaction γ-phase was detected, which was mainly attributed to its smaller particle size. Clinkers prepared by the rapid cooling method exhibited smaller particle size and larger specific surface area compared with those prepared by natural cooling process. It was noteworthy that among the two controlled parameters, boron doping was the primary factor influencing the hydration process and mechanical strength. During the initial 28-day hydration process, the microscopic morphology of the hydration product underwent a sequential evolution, starting as a flocculent thin film, then transforming into a needle-like structure, and finally evolving into a short rod shape morphology. After 28 days of hydration, samples doped with boric acid or prepared by fast cooling underwent silicate chains polymerization due to the increase in hydrogen alkali concentration, leading to the formation of hydration products rich in Q²-type silicate chains. The compressive strength after curing for 28 days for samples doped with boric acid was more than twice that of the samples without boric acid doping. Clinker doped with boric acid and prepared by fast cooling method exhibited ultra-high compressive strength after 28 days of hydration, surpassing 50 MPa.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"469 ","pages":"Article 140508"},"PeriodicalIF":7.4,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143474807","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 toughening of calcium aluminate cement-based grouting materials by in-situ polymerization of acrylamide and the mechanism of toughness change","authors":"Zhiying Guo ,&nbsp;Chunwei Wang ,&nbsp;Liya Zhao ,&nbsp;Hucheng Chai ,&nbsp;Haibo Zhang","doi":"10.1016/j.conbuildmat.2025.140524","DOIUrl":"10.1016/j.conbuildmat.2025.140524","url":null,"abstract":"<div><div>In order to address the high brittleness and cracking risk of calcium aluminate cement-based grouting materials (GM), the study introduced the in-situ polymerization of acrylamide (AM) to toughen GM (P-GM). A comprehensive evaluation was conducted on the mechanical deformation, strength, reaction products, microstructure, and pore structure of samples with AM monomer contents from 0 to 40 wt%. The results indicated that the AM monomer reduced the hydration rate and extent of GM, leading to an increased polymerization degree of AM in the P-GM specimens. Additionally, the bonding between AM and cement particles, coupled with the flocculation and adsorption effects of polyacrylamide (PAM), effectively improved the weak interfacial bonding between different phases. The P-GM specimens exhibited significantly increased deformation capacity, with deflection increasing by 9172.60 % and tensile strain by 1027.69 %. However, the deformation ability of the samples decreased at later stages. Based on these findings, the study proposed a mechanism for the toughening of P-GM and the subsequent reduction in toughness, providing insights into the hydration mechanisms of organic/inorganic composite.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"469 ","pages":"Article 140524"},"PeriodicalIF":7.4,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143474808","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":"Assessment of bond durability between GFRP bars and concrete produced with seawater under seawater exposure at different temperatures","authors":"Eduarda Nepomuceno ,&nbsp;José Sena-Cruz ,&nbsp;Lúcio Lourenço ,&nbsp;Eduardo Pereira","doi":"10.1016/j.conbuildmat.2025.140479","DOIUrl":"10.1016/j.conbuildmat.2025.140479","url":null,"abstract":"<div><div>The growing interest in the use of Glass Fiber Reinforced Polymer (GFRP) bars to reinforce concrete structures, mainly due to their non-corrosion characteristics, allows for the development of more sustainable solutions in the production of reinforced concrete structures, such as using seawater instead of freshwater directly in the concrete composition. Through direct pullout tests (DPT), this work evaluated the bond durability of GFRP bars to concrete produced with seawater (SW) and freshwater (FW) after being subjected to seawater exposure at different temperatures, namely 20 °C, 40 °C and 60 °C, over two years. Unconditioned (reference) air-cured specimens were also tested for comparison. The mechanical properties of the constituent materials in the study, i.e., concrete and GFRP bars, and their influence on bond strength were also analyzed. Finally, the accuracy of existing formulations to predict the bond strength was assessed. The use of SW instead of FW resulted in a reduction in bond strength of approximately 43 % in unconditioned specimens, whereas only a 13 % reduction was observed in specimens conditioned for two years (SW <em>versus</em> FW). Additionally, exposure conditions did not cause significant changes in the failure modes nor with increasing temperature or time. Furthermore, the ACI provisions accurately predicted the bond strength of the two compositions studied.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"469 ","pages":"Article 140479"},"PeriodicalIF":7.4,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143474917","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":"Evaluation and application of basalt fiber reinforcement mesh for improving pavement interlayer bonding property via a new approach of interlayer shear test of composite plate","authors":"Chenzhong Wei ,&nbsp;Man Zhang ,&nbsp;Geng Li ,&nbsp;Yingjun Jiang ,&nbsp;Jiaolong Ren","doi":"10.1016/j.conbuildmat.2025.140518","DOIUrl":"10.1016/j.conbuildmat.2025.140518","url":null,"abstract":"<div><div>Basalt fiber reinforcement mesh (BFRM) demonstrates exceptional compatibility with asphalt mixtures. The BFRM is positioned between the layers of asphalt pavement to create a mosaic occlusion, which theoretically reduces shear stress on the pavement and enhances rutting resistance. To elucidate and quantify the effects of BFRM characteristics and anchorage modes on asphalt pavement performance, the interlayer bonding performance of asphalt pavement utilizing BFRM with varying mesh diameters and mesh grid spacings is investigated through a novel interlayer shear test of composite plates. Additionally, based on the construction of actual engineering test sections, the construction process and quality control measures for basalt fiber-reinforced asphalt pavement are proposed. The results indicate that when the diameter of the BFRM is 4 mm or 6 mm, and the grid spacing is either 60 × 60 mm or 80 × 80 mm, the interlayer bonding properties of asphalt pavement with basalt fiber reinforcement were significantly enhanced compared to asphalt pavement without such reinforcement. Specifically, the shear strength increased by an average of 15 %, and the interlayer bonding coefficient rose by an average of 42 %. Furthermore, when mechanical anchoring is employed with an anchoring depth of 40 mm and an anchoring spacing of 240 × 240 mm, the high-temperature stability, crack resistance, and interlayer bonding performance improve by 14 %, 8 %, and 16 %, respectively.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"469 ","pages":"Article 140518"},"PeriodicalIF":7.4,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143474867","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":"Nondestructive and destructive tests for damage quantification of deteriorated structural timber","authors":"Yail J. Kim,&nbsp;Thi Ha","doi":"10.1016/j.conbuildmat.2025.140542","DOIUrl":"10.1016/j.conbuildmat.2025.140542","url":null,"abstract":"<div><div>This paper presents the degradation processes and resulting outcomes of structural timber, Douglas Fir (Pseudotsuga menziesii), that is broadly used for bridge construction. In accordance with the standard protocol of ASTM D1037, specimens are conditioned and their physical and mechanical properties are measured using nondestructive test methods: moisture metering, stress wave timing, and microdrilling. Furthermore, rebound hammering and digital microscopy characterize the influence of progressive deterioration. After completing planned exposure cycles, all specimens are loaded until failure takes place and the consequences from the nondestructive and destructive tests are appraised comparatively. The accelerated aging causes anisotropic damage with longitudinal checks alongside a change in surface color from light brown to reddish brown. Within a fiber saturation point of 30 %, moisture absorption gives rise to local swelling, raises splitting stresses, and enlarges cellular cavities. With an increase in the internal damage level, stress wave timing ascends by 63.5 % and travel velocities declines by 38.8 %. The resistance of microdrilling also alters from stable to multipeak patterns, representing hardened cell walls and collapsed lumens. A link is established for converting nondestructive metrics to deterioration ratios. Computational algorithms based on machine learning technologies predict the level of deterioration and are employed to formulate performance classifications for practical application.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"469 ","pages":"Article 140542"},"PeriodicalIF":7.4,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143474916","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}