Construction and Building Materials最新文献

{"title":"Temperature kinetics of calcium-activated burnt coal cinder-based geopolymer: Reaction medium and curing temperature","authors":"Muyang Huang ,&nbsp;Shenxu Bao ,&nbsp;Yimin Zhang ,&nbsp;Mengke Li ,&nbsp;Xuan Ke ,&nbsp;Hailin Zhou","doi":"10.1016/j.conbuildmat.2025.141322","DOIUrl":"10.1016/j.conbuildmat.2025.141322","url":null,"abstract":"<div><div>In various regions and seasons, the impact of environment temperature on the reaction medium must be considered in industrial applications and how to determine the optimal curing system to ensure product performance. Within this context, this study focused on the temperature kinetics of calcium-activated low-activity solid waste-based geopolymers and assessed the impact of reaction medium temperature (RMT) and curing temperature (CRT). The influence of RMT during preparation was determined by the hydration heat and slurry fluidity. Moreover, a prediction-judgment model for geopolymer properties, using water absorption as an indicator, was developed to inform CRT system selection. Techniques like XRD, TA, and BJH analysis verified the model's judgment on geopolymer phase and structural changes at various CRT. Results showed the optimal RMT was about 20℃, with deviations reducing slurry workability. During curing, higher CRT accelerated chemical reactions and microstructure evolution. Nevertheless, the prediction-judgment model suggests that there exists a curing time threshold under specific CRT. Curing time beyond this threshold may even have detrimental effects. Given the continuity of temperature, it is essential that changes in threshold values are also continuous. To depict this continuous change, extended mathematical thought is used to map the values on the number line onto the \"loop\". Changes in CRT cause negatively correlated changes in the threshold within this loop. When CRT is below the critical level, the threshold crosses the top of the loop to become negative, signaling geopolymer structural degradation. Meanwhile, the micro-mechanism analysis shows that proper increase in CRT boosts the geopolymerization rate, promoting rapid and extensive formation of gel and yielding denser surfaces with more developed microstructures, thereby enhancing geopolymer properties. In contrast, lower temperatures lead to looser structures and many unreacted particles, showing slower microstructural development.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"478 ","pages":"Article 141322"},"PeriodicalIF":7.4,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143864501","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 investigation on the influence of rice straw characteristics on the hygric, thermal and mechanical properties of straw-lime concretes","authors":"Youssef El Moussi ,&nbsp;Laurent Clerc ,&nbsp;Jean-Charles Benezet","doi":"10.1016/j.conbuildmat.2025.141379","DOIUrl":"10.1016/j.conbuildmat.2025.141379","url":null,"abstract":"<div><div>The utilization of agricultural wastes in the construction sector has experienced impressive expansion due to the growing awareness of climate change. These materials provide a fascinating solution to reduce the energy demand and consequential carbon emissions, thanks to their attractive thermal, hygroscopic and environmental properties. In this context, the present study examines the impact of the characteristics of rice straw particles on the mechanical, hygric and thermal properties of straw concretes. The characterization of the concretes is mainly based on measurements of thermal conductivity, water vapor permeability, moisture buffering capacity, and mechanical properties. Several formulations are defined and tested by varying the type of straw particles and their sampling area on the stem. First, the impact of grinding process of rice straw on concretes incorporating these particles was evaluated. A comparison was made between concretes containing cut particles in the longitudinal direction with a tubular shape with concretes containing milled particles (flatter shape) of similar length. Then, the dependence of the physical and chemical properties of straw particles on their shape and sampling area on the stem is identified. The results showed that the properties of concretes are highly dependent on the shape and sampling area of straw particles. The dependence of the mechanical, thermal and hygric performances of concretes on the particles shape appears to be the most relevant parameter, while the variation in concrete performances based on sampling area is limited. Additionally, the results show that cut particles induce lighter and porous concretes compared to milled particles, leading to an attractive thermal conductivity, moisture buffering capacity and water vapor permeability, while decreasing the mechanical properties of concretes. It is also highlighted that particles extracted from the bottom of the stem exhibit excellent hygric properties, higher deformation capacity and lower thermal conductivity than particles from the top of the stem.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"478 ","pages":"Article 141379"},"PeriodicalIF":7.4,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143864494","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 foaming gas on the physical and mechanical properties of foamed concrete","authors":"Dong Wu ,&nbsp;Yuan Zhang ,&nbsp;Shubin Qin ,&nbsp;Rongqin Deng","doi":"10.1016/j.conbuildmat.2025.141465","DOIUrl":"10.1016/j.conbuildmat.2025.141465","url":null,"abstract":"<div><div>Foamed concrete has been widely applied in the construction field due to its excellent thermal insulation performance. Different foaming gases have an impact on the physical and mechanical properties of foamed concrete. Most of the existing research focuses on the regulation of the thermal insulation performance of foamed concrete by foaming gases, but there is still a lack of systematic understanding of the influence mechanism on key physical properties such as its mechanical strength. This study has been carried out to investigate the effect of foaming gas on the physical properties of foamed concrete. Using the physical foaming method, sulfoaluminate cementitious foamed concrete was produced with carbon dioxide (CO₂), nitrogen (N₂), and Air as foaming agents. The resulting foamed concrete samples were tested and analyzed for various physical properties, including water absorption, softening coefficient, compressive strength, tensile strength, thermal conductivity, and porosity characteristics. The results demonstrate that CO₂ foamed concrete (CFC) exhibits superior water resistance, characterized by a lower water absorption rate and a softening coefficient that displays an inverse dependence. Regarding mechanical properties, while CFC possesses enhanced mechanical capabilities, its peak strength is reached later compared to N₂ foamed concrete (NFC) and Air foamed concrete (AFC). In terms of thermal insulation performance, CFC offers improved thermal insulation, and its incorporation of a lower thermal conductivity gas allows for the production of foam concrete with reduced thermal conductivity. Analysis of the stomatal structure and the composition of hydration products indicated a relative scarcity of tandem and deformed pores in CFC, highlighting a finer stomatal structure and an increased presence of calcium carbonate within the hydration products. At an equivalent density level, foamed concrete produced using CO₂ as the foaming agent demonstrates superior water resistance, mechanical properties, and thermal insulation, with the mechanical and thermal insulation properties showing an inverse dependence relationship. Given its advantageous physical properties, along with its potential for carbon sequestration and emissions reduction, CFC presents promising prospects for practical applications.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"478 ","pages":"Article 141465"},"PeriodicalIF":7.4,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143864500","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":"Recycled concrete paving block waste as a selected sustainable substitute for natural aggregate in cement composites","authors":"Jan Pizoń ,&nbsp;Kateřina Matýsková ,&nbsp;Marie Horňáková ,&nbsp;Małgorzata Gołaszewska ,&nbsp;Gabriela Kratošová","doi":"10.1016/j.conbuildmat.2025.141356","DOIUrl":"10.1016/j.conbuildmat.2025.141356","url":null,"abstract":"<div><div>This study examines the impact of replacing natural aggregates with second-quality sorted concrete paving block (CPB) aggregates in mortars and concretes. Substitution levels varied from 0 % to 100 % for fine aggregates in mortars and 50 % for fine and/or coarse aggregates in concretes. The research analysed the properties of the waste material, including particle size distribution, porosity, water absorption, and density. For mortars and concretes, the evaluated parameters encompassed workability, consistency, density, compressive strength, electrical resistivity, and microstructure. The findings indicate that mortars incorporating CPB aggregates necessitate higher dosages of superplasticizers to achieve desired workability. This requirement is attributed to the increased cement content per unit volume and the finer particle size of the recycled aggregates. Early compressive strength of mortars peaks at a 50 % recycled aggregate content due to a reduced effective water-to-cement ratio, while 100 % substitution of fine aggregate leads to a significant decrease in compressive strength. Concretes with recycled aggregates exhibit comparable or superior early compressive strength relative to reference concrete, but after 28 days, all concretes with recycled aggregates display lower strength. The 28-day compressive strengths are 65.9 MPa, 64.8 MPa, and 62.3 MPa for 50 % replacement by fine, coarse, and a combination of both aggregates, respectively. These results surpass those achieved in similar studies. Durability assessments suggest that concrete mixtures with CPB exhibit trends comparable to reference concrete, indicating moderate resistance to chloride penetration. Overall, the findings suggest that utilizing sorted CPB aggregates is a viable approach to replacing natural aggregates in mortars and concretes.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"478 ","pages":"Article 141356"},"PeriodicalIF":7.4,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143864602","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":"Degradation mechanism of cast-in-situ concrete under long-term sulfate saline soil attack","authors":"Bo Yang ,&nbsp;Xiaopeng Hu ,&nbsp;Aoyang Li ,&nbsp;Tiansong Zhao ,&nbsp;YuanQing Sun ,&nbsp;Hao Fu","doi":"10.1016/j.conbuildmat.2025.141401","DOIUrl":"10.1016/j.conbuildmat.2025.141401","url":null,"abstract":"<div><div>This study investigates the degradation mechanism of cast-in-situ concrete under long-term exposure to sulfate saline soil environments. By designing influencing factors of different salt concentrations (5 %, 10 %, and 15 %), water-to-cement ratios (0.3, 0.4, and 0.5), and cement types (OPC, MSRC, and HSRC), the study examines the appearance deterioration, macroscopic performance degradation, phase composition, microstructural features, and pore structure changes of cast-in-situ concrete under long-term saline soil attack. The results reveal that sulfate attack and the dissolution-leaching of calcium-rich phases are the primary mechanisms driving concrete degradation in saline soils. Notably, higher salt concentrations accelerate degradation processes, making them faster and more localized. Long-term exposure to saline soils causes the porosity of concrete to first decrease and then increase, with significant changes in pore distribution characteristics, and the gel pore growth rate reaching 195.31 %-865.45 %. Microstructural observations further reveal the formation of stratified zones in the concrete, progressing inward from the surface. These zones include a calcite crust, a porous layer, a corrosion product enrichment layer, and a complete area.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"478 ","pages":"Article 141401"},"PeriodicalIF":7.4,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143864502","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":"Augmented photocatalytic efficiency stemming from porous core-shell structure: A synergistic manifestation of nano-TiO2 and Fe2O3-enriched recycled clay brick aggregates as hosting matrix","authors":"Xue-Fei Chen ,&nbsp;Xiangping Xian ,&nbsp;Wei-Zhi Chen ,&nbsp;Binmeng Chen","doi":"10.1016/j.conbuildmat.2025.141395","DOIUrl":"10.1016/j.conbuildmat.2025.141395","url":null,"abstract":"<div><div>In this study, a pioneering methodology is delineated, wherein Fe₂O₃-enriched recycled red brick aggregates are harnessed as avant-garde carrier substrates, resulting in a profound enhancement of the intrinsic self-cleansing capabilities of TiO₂. The innate porous core-shell architecture of these recycled aggregates engenders a notable synergistic interaction between nano-TiO₂ and Fe₂O₃, culminating in a marked escalation of photocatalytic efficiency. An exhaustive examination of the degradation proficiency across a spectrum of samples against methyl blue, conducted over a gradient of temporal intervals, has been executed. The findings indicate that the rates of degradation for all samples increase progressively with the prolongation of exposure to UV irradiation. The control group, consisting exclusively of white cement, demonstrated the most diminutive degradation rate, achieving merely a 4 % reduction in methyl blue concentration through UV irradiation alone. Conversely, the nano-TiO2-modified recycled grey brick aggregate (NT-RGBA) and recycled red brick aggregate (NT-RRBA) samples showcased substantially elevated degradation rates, a phenomenon attributable to the incorporation of photocatalytic agents capable of capitalizing on UV energy to expedite the degradation process of methyl blue. The NT-RRBA composite, an amalgamation of the photocatalytic attributes of TiO₂, the synergistic interplay between Fe₂O₃ and TiO₂, and the intricate three-dimensional pore framework of RRBA, manifested the most pronounced degradation rate. To delve deeper into the determinants influencing the efficacy of photocatalytic degradation, a fuzzy inference system has been deployed to construct a mathematical model that scrutinizes the effects of variables such as the initial concentration of pollutants and the flow rate. This quantitative methodology affords to establish a functional relationship that encapsulates the underlying dynamics of the photocatalytic degradation phenomenon. Deploying this functional material, a derivative of construction detritus, paves the way for an innovative strategy of closed-loop resource utilization, marking a significant milestone towards sustainable development within the construction sector.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"478 ","pages":"Article 141395"},"PeriodicalIF":7.4,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143864504","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":"Contributions of aggregate mineralogical and morphological parameters to aggregate frictional performance","authors":"G. Sandeep Reddy,&nbsp;Imad N. Abdallah,&nbsp;Soheil Nazarian","doi":"10.1016/j.conbuildmat.2025.141413","DOIUrl":"10.1016/j.conbuildmat.2025.141413","url":null,"abstract":"<div><div>The frictional performance of aggregates is crucial in the skid resistance of asphalt mixtures. Conventional methods for quantifying aggregate frictional resistance by the process of sample preparation and polishing are time-consuming. This study investigates the potential of aggregate mineralogical (e.g., average hardness value (AHV) and contrast of hardness (COH)) and morphological parameters (e.g., angularity and texture) in estimating aggregate frictional performance. A total of twenty-eight aggregate sources from quarries in different locations within Texas were sampled and subjected to mineralogical and morphological evaluation using powder X-ray diffraction (XRD) and aggregate image measurement system (AIMS), respectively. The frictional performance was evaluated after polishing using a three-wheel polishing device with a dynamic friction tester device. The contributions of mineralogical and morphological parameters on aggregate frictional performance were assessed based on pairwise correlation and multiple linear regression analysis. The results indicate that aggregate frictional performance is controlled by AHV and COH and, to a lesser extent, by the angularity and texture of aggregates. The study suggests that powder XRD can be used as a faster alternative to conventional test methods for assessing aggregate frictional resistance.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"478 ","pages":"Article 141413"},"PeriodicalIF":7.4,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143859656","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":"Producing synchronous grouting material from shield muck with the use of ground granulated blast-furnace slag and carbide sludge","authors":"Yujun Du ,&nbsp;Xinlei Sun ,&nbsp;Wei Liu ,&nbsp;Peixin Shi ,&nbsp;Wentao Li","doi":"10.1016/j.conbuildmat.2025.141428","DOIUrl":"10.1016/j.conbuildmat.2025.141428","url":null,"abstract":"<div><div>Shield tunneling generates a significant amount of shield muck, which is commonly treated as waste and requires long-distance transport and extensive land occupation for disposal. One potential solution is to utilize shield muck to produce synchronous grouting material, which is required in shield tunnel construction. This study explores the use of industry byproducts, namely ground granulated blast-furnace slag (GGBS) and carbide sludge (CS), in the treatment of shield muck to produce synchronous grout, aiming to enhance treatment efficiency and reduce cost. The strength, consistency, flowability, setting time, and microstructure characteristics of GGBS-CS treated shield muck were examined and compared with those of corresponding ordinary Portland cement (OPC) specimens. Results showed that the optimum strength of GGBS-CS-treated shield muck was 0.86 MPa at 3 days and 3.20 MPa at 28 days, which were 2.5 and 3.2 times higher than that of OPC specimens at these two ages, respectively. In addition, other engineering properties, including consistency, flowability, bleeding rate, and setting time of GGBS-CS-treated shield muck met the standard requirements for synchronous grouting. Microscopic analyses identified the presence of calcium-silicate-hydrate (C-S-H) and ettringite in both GGBS-CS- and OPC-treated shield muck, which were generated through binder hydration and pozzolanic reactions of shield muck minerals. Cost analysis indicated that this technique could reduce the construction cost by 279 CNY per cubic meter in the production of synchronous grout. The findings of this research support the reutilization of shield muck in practical shield tunnel projects.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"478 ","pages":"Article 141428"},"PeriodicalIF":7.4,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143864495","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":"Lithium slag-ground granulated blast furnace slag based geopolymer: Efflorescence mechanism analysis","authors":"Cai Wu ,&nbsp;Yuanyi Wang ,&nbsp;Yan Shi ,&nbsp;Yali Hu ,&nbsp;Daopei Zhu ,&nbsp;Li Ai ,&nbsp;Zhijiang Li ,&nbsp;Yani Lu","doi":"10.1016/j.conbuildmat.2025.141418","DOIUrl":"10.1016/j.conbuildmat.2025.141418","url":null,"abstract":"<div><div>This study explores the efflorescence mechanism of lithium slag-ground granulated blast furnace slag-based geopolymer (LGB), focusing on the influence of alkali concentrations (3 %, 5 %, and 7 %), types of chemical activators (NaOH and Na₂SiO₃), exposure environments (ambient air, nitrogen, and carbon dioxide), and varying levels of relative humidity (40–80 %) on the efflorescence behavior of the samples. Leaching experiments using paste samples of varying particle sizes were carried out to examine how efflorescence impacts LGB samples across different heights. The results indicate that under lower relative humidity conditions, the efflorescence process is faster and more significant. The location of the efflorescence products is closely related to the porosity of the matrix, with higher porosity in LGB samples showing a larger efflorescence front. Additionally, NS paste is more susceptible to cracking during water exposure than NH paste, with the accumulation of efflorescence products further intensifying this issue. This study also proposes a new method for quantifying efflorescence, which is highly consistent with efflorescence observations and leaching experiment results. Furthermore, the study found that under the influence of carbonate ions, a competitive reaction occurs between Ca and Na, with CaCO₃ primarily found in the natural carbonation region and CaCO₃ being less common in the efflorescence product region. Overall, this study provides a theoretical basis for understanding the efflorescence mechanism of LGB samples and their durability, offering helpful guidance for optimizing the long-term performance of LGB materials.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"478 ","pages":"Article 141418"},"PeriodicalIF":7.4,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143860053","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":"XGBoost assisted in identifying the structural damage behavior of fiber-reinforced concrete during the soundless demolition process through electrical resistance changes","authors":"Weichen Tian ,&nbsp;Ruipeng Qiu ,&nbsp;Zhen Tang ,&nbsp;Yiwei Zhong ,&nbsp;Xianglong Liu ,&nbsp;Xingang Wang ,&nbsp;Fubing Zou ,&nbsp;Ruisen Li","doi":"10.1016/j.conbuildmat.2025.141376","DOIUrl":"10.1016/j.conbuildmat.2025.141376","url":null,"abstract":"<div><div>Real-time and accurate feedback of structural state during concrete demolition period is significant to promise the safe and controllable construction process. In this work, soundless demolition technology (SDT) was used to demolish carbon fibers reinforced concrete (CFRC). The electrical resistance and crack widths of SDT processed CFRC were recorded with varying water to agent ratios (w/a) and fiber fractions. Results demonstrated that the carbon fibers (CFs) contents showed insignificant influence on the compressive strength at 240 days, while exhibited remarkable advantage on reducing the electrical resistance and resisting the cracking induced by the internal expansion force. Collectively, the competition between the material’s resistance and expansion force determines the demolition process, and the increase in CFs contributes to improving the material’s resistance, while higher w/a weakened the expansion force. Moreover, the electrical resistance exhibited a specific decrease-then-increase trend during the demolition process, which was related to the “squeeze effect” induced by the expansion force. A strong relationship was observed between electrical resistance and crack width, and the XGBoost model was established to elucidate the effects of different variables on the crack width with high accuracy (<em>R</em>²=0.994), the hyperparameters were determined based on the grid search and 10-fold cross-validation method, and the model was further verified by the SHAP indicators.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"478 ","pages":"Article 141376"},"PeriodicalIF":7.4,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143860057","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}