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Structuration of lean-agile integrated factors for construction projects 建设项目精益敏捷集成要素的构建
IF 3.3 Pub Date : 2023-01-06 DOI: 10.1108/ci-05-2022-0105
Vijayeta Malla
PurposeThis study aims to analyze and understand mutual relationships between lean and agile enabling factors in the context of the construction domain and put forth the most driving and dependent enablers for a hybrid lean–agile system (HLAS).Design/methodology/approachA threefold research flow is adopted. First, the content analysis of literature stemmed from the identification of preliminary enablers (n = 26). Second, a questionnaire survey (n = 101) is administered to downsize enablers to ten using the relative importance index. Further, in the third phase, interpretive structural modeling (ISM) and the cross-impact matrix multiplication applied to classification analysis were performed amid the ten key enablers through pairwise interactions from subject matter experts (n = 19). Hierarchical representation of enablers has been presented, which facilitates a conceptual model for application in the construction industry.FindingsThe ISM model demonstrates a three leveled classification structure that showcases direct and transitive relationships among various enablers. “Use of project management tools” is the driving enabler, followed by “collaborative and common data platform working” and “institution of team training” are critical enablers to HLAS adoption.Originality/valueA structured way of identification of interdependent among lean–agile is a vital unique contribution to this study. The results serve as a knowledge base for practical adoption of HLAS and may prove to be influential in developing a framework for easier adoption in developing countries.
目的分析和理解建筑领域中精益和敏捷使能因素之间的相互关系,提出精益-敏捷混合系统(HLAS)最具驱动性和依赖性的使能因素。设计/方法/方法采用了三重研究流程。首先,文献的内容分析源于初步使能因素的识别(n = 26)。其次,通过问卷调查(n = 101),使用相对重要性指数将推动者缩减为10个。此外,在第三阶段,通过主题专家(n = 19)的成对交互,对10个关键促成因素进行了解释结构建模(ISM)和应用于分类分析的交叉影响矩阵乘法。提出了使能器的分层表示,这有助于在建筑行业中应用的概念模型。发现ISM模型展示了一个三层的分类结构,展示了各种促成因素之间的直接和传递关系。“项目管理工具的使用”是推动因素,其次是“协作和通用数据平台工作”和“团队培训制度”是HLAS采用的关键推动因素。一种结构化的方法来识别精益和敏捷之间的相互依赖关系是本研究的一个重要的独特贡献。研究结果可作为实际采用HLAS的知识库,并可能对制定一个框架以使发展中国家更容易采用HLAS产生影响。
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引用次数: 0
The link between construction apps’ acceptance and digital attributes of construction professionals: perspectives from digital competence model 建筑应用的接受度与建筑专业人员数字属性的关系——基于数字能力模型的视角
IF 3.3 Pub Date : 2022-12-23 DOI: 10.1108/ci-04-2022-0094
Oluseye Olugboyega, Kayode Emmanuel Ilesanmi, G. Oseghale, C. Aigbavboa
PurposeThe advancement of digital technological breakthroughs in the construction industry is dependent on connecting the attributes of the intended consumers to the technologies. Thus, this study aims to look at the relationship between construction app acceptance and the digital qualities of construction professionals (CPs) to determine whether understanding the connection can assist predict construction app user behaviour.Design/methodology/approachThis study’s theoretical approach was derived from the European Union digital competence model, which supports the hypothesis that the traits associated with digital competence enable digitally competent CPs to embrace construction apps. Six hypotheses were developed to investigate the theories, and multiple linear regression analysis was used to predict the acceptance of construction apps based on the CP’s attributes.FindingsThe investigation’s findings revealed that the CP’s attributes can explain at least 50% of the proportion of variance in 34 construction apps. The use of a smartphone (Mean Score = 3.30; Factor Loading = 0.609), technological orientation (Mean Score = 3.55; Factor Loading = 0.663), information technology skills (Mean Score = 3.48; Factor Loading = 0.649), information on construction innovation (Mean Score = 3.73; Factor Loading = 0.528) and interest in R&D (Mean Score = 3.48; Factor Loading = 0.531) are the digital characteristics that can essentially forecast the acceptance of construction apps. The data backs up the notion that CPs would gain digital competency before accepting construction apps. This is because a digitally savvy CP will most likely embrace construction apps.Research limitations/implicationsFrameworks for accelerating digital technologies and innovations in the construction industry have been unveiled in this study. The research also gives recommendations for the evaluation, design and implementation of a more attractive construction app. This study also has implications for investigating the impacts of risk aversion, personal connection, social influence, technological curiosity and digital nativity as predictors of construction app uptake.Practical implicationsThe findings of this study serve as an index for prioritising digital traits for CPs and characterising a digitally proficient construction professional. The findings provide recommendations for organising, training and supporting construction personnel’ digital competencies. The research is useful for developing and implementing instructional digital training programmes.Originality/valueThis study is unusual in that it provides clear insights on construction apps as well as variables for building great user-experience apps for CPs, which are both limited in the literature.
目的建筑行业数字技术突破的进展取决于将目标消费者的属性与技术联系起来。因此,本研究旨在研究建筑应用程序接受度与建筑专业人员(CP)数字素质之间的关系,以确定理解这种联系是否有助于预测建筑应用程序用户行为。设计/方法论/方法本研究的理论方法来源于欧盟数字能力模型,该模型支持与数字能力相关的特征使具有数字能力的CP能够接受建筑应用程序的假设。提出了六个假设来研究这些理论,并使用多元线性回归分析来预测基于CP属性的建筑应用程序的接受度。调查结果显示,CP的属性可以解释34个建筑应用程序中至少50%的差异比例。智能手机的使用(平均得分=3.30;因素负荷=0.609)、技术导向(平均得分3.55;因素负荷0.663)、信息技术技能(平均得分3.48;因素负荷0.659),关于建筑创新的信息(平均得分=3.73;因子负载=0.528)和对研发的兴趣(平均得分=3.48;因子负载=0.531)是基本上可以预测建筑应用程序接受度的数字特征。这些数据支持了这样一种观点,即CP在接受建筑应用程序之前会获得数字能力。这是因为精通数字的CP很可能会接受建筑应用程序。研究局限性/含义本研究揭示了加快建筑业数字技术和创新的框架。该研究还为更具吸引力的建筑应用程序的评估、设计和实施提供了建议。这项研究也有助于调查风险厌恶、个人关系、社会影响、技术好奇心和数字原生性对建筑应用吸收的影响。实践意义本研究的结果可作为优先考虑CP的数字特征和描述精通数字的建筑专业人员的指标。研究结果为组织、培训和支持施工人员的数字能力提供了建议。该研究有助于制定和实施数字化教学培训计划。独创性/价值这项研究不同寻常,因为它提供了关于建筑应用程序的清晰见解,以及为CP构建卓越用户体验应用程序的变量,而这两个变量在文献中都是有限的。
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引用次数: 0
Success factors of digital technologies (DT) tools adoption for sustainable construction in a developing economy 发展中经济体采用数字技术(DT)工具进行可持续建设的成功因素
IF 3.3 Pub Date : 2022-12-22 DOI: 10.1108/ci-08-2022-0207
Ayodeji Emmanuel Oke, John Aliu, Solomon A. Onajite, M. Siméon
PurposeAs the construction sector constantly seeks ways to address ever-growing societal demands, the need to embrace innovation and digital technologies (DTs) cannot be overstated. Therefore, the purpose of this study is to assess the success factors influencing the adoption of DTs to achieve sustainable construction in a developing economy such as Nigeria.Design/methodology/approachA quantitative research approach was conducted with close-ended questionnaires developed and administered to construction professionals based in Lagos State, Nigeria. Data obtained was analyzed using percentages, frequency, mean item score and exploratory factor analysis.FindingsThe findings from the mean scores revealed the leading influential success factors which were education and training, methodology of model constructions, organization development, customer satisfaction and profitability and new revenue. Factor analysis revealed three clusters of success factors which were management needs, construction methodology and effective communication.Practical implicationsTo adequately integrate DTs into construction industry activities and processes, awareness about the technologies must be created and enhanced if already in play. This study posits that the construction sector must accept and implement this new paradigm of innovation to benefit from this disruptive era.Originality/valueThis study serves as a foundation for other related studies that are aimed at advocating the efficacy of DTs in the effective and efficient execution of construction activities. The assessment of the success factors influencing the adoption of DTs would help construction organizations and stakeholders to understand the need to embrace and implement smart technologies into the activities, operations and processes of the construction industry.
目的随着建筑业不断寻求解决日益增长的社会需求的方法,拥抱创新和数字技术(DT)的必要性怎么强调都不为过。因此,本研究的目的是评估在尼日利亚等发展中经济体中影响采用DTs实现可持续建筑的成功因素。设计/方法/方法采用定量研究方法,对尼日利亚拉各斯州的建筑专业人员进行了封闭式问卷调查。使用百分比、频率、平均项目得分和探索性因素分析对获得的数据进行分析。结果平均得分的结果揭示了影响成功的主要因素,即教育和培训、模型构建方法、组织发展、客户满意度和盈利能力以及新收入。因子分析揭示了三类成功因素,即管理需求、施工方法和有效沟通。实际意义为了将DTs充分融入建筑行业的活动和流程,必须建立并提高对技术的认识(如果已经在发挥作用的话)。这项研究认为,建筑业必须接受并实施这种新的创新模式,才能从这个颠覆性的时代中受益。原创性/价值本研究为其他相关研究奠定了基础,这些研究旨在倡导DTs在有效执行施工活动中的功效。评估影响DTs采用的成功因素将有助于建筑组织和利益相关者理解将智能技术纳入建筑业活动、运营和流程的必要性。
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引用次数: 2
A deep learning-based approach to facilitate the as-built state recognition of indoor construction works 一种基于深度学习的方法,用于促进室内建筑工程的竣工状态识别
IF 3.3 Pub Date : 2022-12-20 DOI: 10.1108/ci-05-2022-0121
B. Ekanayake, Alireza Ahmadian Fard Fini, Johnny Kwok-Wai Wong, Peter Smith
PurposeRecognising the as-built state of construction elements is crucial for construction progress monitoring. Construction scholars have used computer vision-based algorithms to automate this process. Robust object recognition from indoor site images has been inhibited by technical challenges related to indoor objects, lighting conditions and camera positioning. Compared with traditional machine learning algorithms, one-stage detector deep learning (DL) algorithms can prioritise the inference speed, enable real-time accurate object detection and classification. This study aims to present a DL-based approach to facilitate the as-built state recognition of indoor construction works.Design/methodology/approachThe one-stage DL-based approach was built upon YOLO version 4 (YOLOv4) algorithm using transfer learning with few hyperparameters customised and trained in the Google Colab virtual machine. The process of framing, insulation and drywall installation of indoor partitions was selected as the as-built scenario. For training, images were captured from two indoor sites with publicly available online images.FindingsThe DL model reported a best-trained weight with a mean average precision of 92% and an average loss of 0.83. Compared to previous studies, the automation level of this study is high due to the use of fixed time-lapse cameras for data collection and zero manual intervention from the pre-processing algorithms to enhance visual quality of indoor images.Originality/valueThis study extends the application of DL models for recognising as-built state of indoor construction works upon providing training images. Presenting a workflow on training DL models in a virtual machine platform by reducing the computational complexities associated with DL models is also materialised.
目的识别施工构件的竣工状态对于施工进度监控至关重要。建筑学者已经使用基于计算机视觉的算法来自动化这一过程。由于室内物体、照明条件和摄像机定位方面的技术挑战,室内场地图像的鲁棒物体识别受到了阻碍。与传统的机器学习算法相比,一阶段检测器深度学习(DL)算法可以优先考虑推理速度,实现实时准确的目标检测和分类。本研究旨在提出一种基于DL的方法,以促进室内建筑工程的竣工状态识别。设计/方法论/方法基于DL的一阶段方法建立在YOLO版本4(YOLOv4)算法的基础上,使用迁移学习,在Google Colab虚拟机中定制和训练很少的超参数。室内隔墙的框架、隔热和干墙安装过程被选为竣工场景。为了训练,从两个室内网站拍摄了图像,并公开了在线图像。发现DL模型报告了最佳训练重量,平均精度为92%,平均损失为0.83。与以往的研究相比,本研究的自动化水平较高,因为使用了固定的延时相机进行数据收集,预处理算法零人工干预,以提高室内图像的视觉质量。独创性/价值本研究扩展了DL模型在提供训练图像后识别室内建筑工程竣工状态的应用。还实现了通过降低与DL模型相关联的计算复杂性来在虚拟机平台中呈现关于训练DL模型的工作流程。
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引用次数: 1
Evaluation of success factors to implement digitalization in the construction industry 建筑业实施数字化的成功因素评估
IF 3.3 Pub Date : 2022-12-19 DOI: 10.1108/ci-02-2022-0042
Avirag Bajpai, S. Misra
PurposeThis study aims to identify and rank the key success factors linked with digitalization in the Indian construction sector. Because the construction firms in India are in the early stages of implementing digitalization in their operations, it provides a framework from which they may focus on the effectiveness of digitalization.Design/methodology/approachThis research study examines 12 success factors related to digitalization in construction, which are derived from various sectors. Furthermore, experts from the construction industry and academia have validated these factors with respect to the Indian construction sector. The multi-criteria decision-making techniques are further used to examine the interrelationship, ranking and weightage of digitalization success. Finally, the success factors are validated through a questionnaire-based empirical study followed by ranking using a t-test. The results from both approaches (company-specific and generalized) are compared and discussed.FindingsThis research identifies that selecting appropriate digital methods and techniques is a critical success factor as far as digitalization in the Indian construction scenario is concerned. Besides that, continuous monitoring and control in digital implementation significantly impact other factors.Research limitations/implicationsWhile similar results are obtained from approaches adopted in the study, a few success factors appear to differ in terms of their ranking position. Further studies can explore the finer details that can explain the behavior pattern. This study can also be extended by assessing the structural relationship among the identified factors that can throw more light on the dynamics of the continuation of digitalization in construction which can further help in formulating policies or digitalization rollout.Practical implicationsThe outcome of this study sheds light on construction business knowledge by stressing key success elements connected to digitalization in construction processes in the Indian construction sector. Moreover, this study shows that the success of digitalization in construction is similar to that of transformation in the information technology industry, where adopting suitable digital methods and techniques plays a vital role in the transformation process.Originality/valueDespite the multiple benefits of construction digitalization, limited research focuses on digitalization success factors, making this study unique. Furthermore, this study demonstrates that integrating Fuzzy decision-making trial and evaluation laboratory and maximum mean de-entropy approaches may be used to successfully prioritize success factors in the nascent stage of construction digitalization.
本研究旨在确定与印度建筑行业数字化相关的关键成功因素并对其进行排名。由于印度的建筑公司正处于在其运营中实施数字化的早期阶段,因此它提供了一个框架,可以让他们专注于数字化的有效性。设计/方法/方法本研究考察了12个与建筑数字化相关的成功因素,这些因素来自不同的部门。此外,来自建筑行业和学术界的专家已经就印度建筑部门验证了这些因素。采用多准则决策技术进一步考察数字化成功的相互关系、排名和权重。最后,通过基于问卷的实证研究验证成功因素,然后使用t检验进行排名。比较和讨论了两种方法(特定于公司和一般方法)的结果。本研究发现,选择适当的数字化方法和技术是印度建筑数字化的关键成功因素。除此之外,数字化实施过程中的持续监控对其他因素的影响也很大。虽然研究中采用的方法获得了类似的结果,但一些成功因素的排名似乎有所不同。进一步的研究可以探索更精细的细节来解释这种行为模式。本研究还可以通过评估所识别因素之间的结构关系来扩展,这些因素可以更清楚地了解建筑业数字化持续发展的动态,从而进一步帮助制定政策或数字化推广。实际意义本研究的结果通过强调与印度建筑部门建设过程中数字化相关的关键成功因素,揭示了建筑业务知识。此外,本研究表明,建筑业数字化的成功与信息技术行业的转型相似,采用合适的数字化方法和技术在转型过程中起着至关重要的作用。独创性/价值尽管建筑数字化带来了诸多好处,但对数字化成功因素的研究有限,这使得本研究具有独特性。此外,本研究还表明,将模糊决策试验和评价实验室与最大平均去熵方法相结合,可以成功地在建筑数字化初期确定成功因素的优先级。
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引用次数: 1
Impacts of institutional isomorphism on the adoption of social procurement in the Chinese construction industry 制度同构对中国建筑业采用社会采购的影响
IF 3.3 Pub Date : 2022-12-14 DOI: 10.1108/ci-02-2022-0035
A. Nawaz, Francis Lanme Guribie
PurposeSocial procurement (SP) is a complicated and risky innovation, the adoption of which needs to be accompanied by complementary process and organizational change. To date, however, there has been little empirical evidence explaining whether and how different sorts of external pressures affect the level of SP adoption in the construction sector. Drawing on institutional theory, this study aims to analyze how three types of isomorphic pressures (i.e. coercive, mimetic and normative pressures) influence the adoption of SP in the construction sector.Design/methodology/approachThe impacts of these pressures are empirically tested with survey data collected from 134 construction firms in the Chinese construction industry.FindingsThe findings show that both coercive and mimetic pressures have a considerable impact on the adoption of SP. However, there is little evidence in this study that normative demands had a major impact on SP.Practical implicationsThis research is a useful instrument for promoting a favorable social attitude regarding construction procurement. Through socioeconomic regeneration and development, procurement can be considered as a significant route for social transformation, economic development and poverty reduction.Originality/valueThis study addresses the paucity of research into SP in the construction industry by establishing the institutional drivers to procuring services and products from a social enterprise perspective. Findings from this study extend the frontiers of existing knowledge on SP in the construction industry.
目的社会采购是一项复杂而有风险的创新,其采用需要伴随着互补的过程和组织变革。然而,到目前为止,几乎没有实证证据解释不同类型的外部压力是否以及如何影响建筑业采用SP的水平。基于制度理论,本研究旨在分析三种类型的同构压力(即强制性压力、模仿性压力和规范性压力)如何影响建筑业采用SP。设计/方法论/方法利用从中国建筑业134家建筑公司收集的调查数据,对这些压力的影响进行了实证检验。研究结果表明,强制压力和模仿压力对SP的采用都有相当大的影响。然而,本研究中几乎没有证据表明规范性要求对SP有重大影响。实际含义本研究是促进对建筑采购的良好社会态度的有用工具。通过社会经济再生和发展,采购可以被视为社会转型、经济发展和减贫的重要途径。独创性/价值本研究通过从社会企业的角度建立采购服务和产品的制度驱动因素,解决了建筑业SP研究的匮乏问题。这项研究的结果扩展了建筑业SP现有知识的前沿。
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引用次数: 5
The usability of a novel mobile augmented reality application for excavation process considering safety and productivity in construction 考虑施工安全和生产力的新型移动增强现实应用程序在挖掘过程中的可用性
IF 3.3 Pub Date : 2022-12-09 DOI: 10.1108/ci-07-2022-0168
F. Abdeen, Randima Nirmal Gunatilaka, S. Sepasgozar, David Edwards
PurposeThis study aims to assess the usability of augmented reality (AR) based mobile app for excavation and earthmoving processes using a novel tool entitled Excavator Augmented Reality (EAR).Design/methodology/approachA mixed-methods research approach was used through conducting experimentation to collect qualitative and quantitative data collected from the Sri Lankan construction sector. EAR app was used for experimentation in outdoor areas examining how a 360° tracked hydraulic excavator can be navigated in different physical environments similar to the real prospected job.FindingsThe findings reveal that EAR could make a considerable impact on enhancing productivity, safety and training processes. However, the developed EAR App subjected to assessment demonstrated the highest satisfaction gap for the auditory aspects. Among the remaining criterion, the satisfaction met user expectations for comfortability and no-risk practice. An analysis of strengths, weaknesses, opportunities and threats (SWOT analysis) conducted revealed that visualising the excavator activities and the requirements of improved features were the highest agreed strengths and weaknesses of the EAR. Among the opportunities for improvement, the necessity of improving emergency and safety reached the highest agreement. Moreover, the study presented the challenges in introducing mobile augmented reality (MAR) to the construction sector under the political, economic, sociocultural, technological, environmental and legal (PESTEL) model along with solutions to be taken.Originality/valueThis study provides a novel approach to addressing the safety, productivity and training concerns in heavy mobile plants and machinery on construction sites which remains to be unexplored to this end.
本研究旨在评估基于增强现实(AR)的移动应用程序在挖掘和土方过程中的可用性,该应用程序使用一种名为挖掘机增强现实(EAR)的新工具。设计/方法/方法采用混合方法研究方法,通过进行实验收集从斯里兰卡建筑部门收集的定性和定量数据。EAR应用程序用于户外区域的实验,研究如何在与实际工作相似的不同物理环境中导航360°履带式液压挖掘机。调查结果调查结果显示,EAR可以对提高生产力、安全和培训过程产生相当大的影响。然而,经过评估的开发的EAR应用程序在听觉方面表现出最高的满意度差距。在其余标准中,满意度满足用户对舒适和无风险实践的期望。对优势、劣势、机会和威胁的分析(SWOT分析)表明,可视化挖掘机活动和改进功能的要求是EAR的最高商定优势和劣势。在改进的机会中,提高应急和安全的必要性得到了最高的认可。此外,该研究还提出了在政治、经济、社会文化、技术、环境和法律(PESTEL)模式下将移动增强现实(MAR)引入建筑行业所面临的挑战,以及需要采取的解决方案。独创性/价值本研究为解决建筑工地重型移动设备和机械的安全、生产力和培训问题提供了一种新方法,这些问题仍有待探索。
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引用次数: 1
Influence of Internal Curing with Lightweight Pumice Fine Aggregate on the Mechanical Properties of Cement Mortars 轻质浮石细骨料内养护对水泥砂浆力学性能的影响
IF 3.3 Pub Date : 2022-12-07 DOI: 10.15282/construction.v2i2.8744
Dr. Ferhad Rahim Karim
The cement mortar in the building encounters a problem of curing due to covering mortar under finishing materials such as tiles, stones, and marble. Internal curing is one of the methods for solving this problem. This investigation highlights the impact of internal curing with lightweight pumice fine aggregate on cement mortar's mechanical properties, such as compressive and tensile strengths, and performance, such as density. Thus, the internal cured water-to-cement ratio was studied, which varied from 0 to 21.5%, and the partial replacement of natural sand with lightweight pumice fine aggregate varied from 0% to 16.63%. The results showed the mechanical properties improved with the increased internal water-to-cement ratio. Increasing the internal cured water-to-cement ratio up to 21.52% improves the compressive, split tensile, and flexural strengths of cement mortar up to 77.3%, 56.42%, and 28.71%, respectively. In addition, the partial replacement of natural sand with lightweight pumice aggregate up to 10.9% enhances the compressive, split tensile, and flexural strengths of cement mortar up to 24.2%, 6.1%, and 28.7%, respectively, due to a reduction in drying and autogenous shrinkage.
建筑中的水泥砂浆由于在瓷砖、石材、大理石等饰面材料下覆盖砂浆而出现固化问题。内固化是解决这一问题的方法之一。本研究强调了轻质浮石细骨料内部养护对水泥砂浆力学性能(如抗压和抗拉强度)和性能(如密度)的影响。因此,研究了内固化水灰比范围为0 ~ 21.5%,轻质浮石细骨料部分替代天然砂范围为0% ~ 16.63%。结果表明,随着内部水灰比的增大,材料的力学性能得到改善。将内固化水灰比提高至21.52%,水泥砂浆的抗压强度、劈裂抗拉强度和抗弯强度分别提高77.3%、56.42%和28.71%。此外,轻质浮石骨料部分替代天然砂达到10.9%,水泥砂浆的抗压、劈裂拉伸和抗弯强度分别提高了24.2%、6.1%和28.7%,这是由于干燥和自收缩的减少。
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引用次数: 0
Asset management-based resilience index formulation for pavements via principal components analysis 基于资产管理的路面弹性指标主成分分析
IF 3.3 Pub Date : 2022-12-07 DOI: 10.1108/ci-04-2022-0083
Ahmed Mohammed, T. Zayed, F. Nasiri, A. Bagchi
PurposeThis paper extends the authors’ previous research work investigating resilience for municipal infrastructure from an asset management perspective. Therefore, this paper aims to formulate a pavement resilience index while incorporating asset management and the associated resilience indicators from the authors’ previous research work.Design/methodology/approachThis paper introduces a set of holistic-based key indicators that reflect municipal infrastructure resiliency. Thenceforth, the indicators were integrated using the weighted sum mean method to form the proposed resilience index. Resilience indicators weights were determined using principal components analysis (PCA) via IBM SPSS®. The developed framework for the PCA was built based on an optimization model output to generate the required weights for the desired resilience index. The output optimization data were adjusted using the standardization method before performing PCA.FindingsThis paper offers a mathematical approach to generating a resilience index for municipal infrastructure. The statistical tests conducted throughout the study showed a high significance level. Therefore, using PCA was proper for the resilience indicators data. The proposed framework is beneficial for asset management experts, where introducing the proposed index will provide ease of use to decision-makers regarding pavement network maintenance planning.Research limitations/implicationsThe resilience indicators used need to be updated beyond what is mentioned in this paper to include asset redundancy and structural asset capacity. Using clustering as a validation tool is an excellent opportunity for other researchers to examine the resilience index for each pavement corridor individually pertaining to the resulting clusters.Originality/valueThis paper provides a unique example of integrating resilience and asset management concepts and serves as a vital step toward a comprehensive integration approach between the two concepts. The used PCA framework offers dynamic resilience indicators weights and, therefore, a dynamic resilience index. Resiliency is a dynamic feature for infrastructure systems. It differs during their life cycle with the change in maintenance and rehabilitation plans, systems retrofit and the occurring disruptive events throughout their life cycle. Therefore, the PCA technique was the preferred method used where it is data-based oriented and eliminates the subjectivity while driving indicators weights.
目的本文从资产管理的角度扩展了作者先前对市政基础设施弹性的研究工作。因此,本文旨在制定路面弹性指数,同时结合资产管理和作者先前研究工作中的相关弹性指标。设计/方法论/方法本文介绍了一套基于整体的关键指标,这些指标反映了市政基础设施的弹性。然后,采用加权和均值法对指标进行综合,形成所提出的弹性指数。通过IBM SPSS®使用主成分分析(PCA)确定弹性指标权重。所开发的主成分分析框架是基于优化模型输出构建的,以生成所需弹性指数的所需权重。在执行PCA.Findings之前,使用标准化方法对输出优化数据进行了调整。本文提供了一种生成市政基础设施弹性指数的数学方法。在整个研究过程中进行的统计测试显示出高度显著性水平。因此,对复原力指标数据使用主成分分析是恰当的。所提出的框架有利于资产管理专家,在资产管理专家中,引入所提出的指数将使决策者在路面网络维护规划方面易于使用。研究局限性/含义所使用的弹性指标需要更新,以包括资产冗余和结构性资产能力。使用聚类作为验证工具,对于其他研究人员来说是一个很好的机会,可以单独检查与所产生的聚类相关的每条路面走廊的弹性指数。独创性/价值本文提供了一个整合弹性和资产管理概念的独特例子,是实现这两个概念全面整合的重要一步。所使用的主成分分析框架提供了动态弹性指标权重,因此提供了动态韧性指数。弹性是基础设施系统的一个动态特性。在其生命周期中,随着维护和修复计划的变化、系统改造以及整个生命周期中发生的破坏性事件,情况有所不同。因此,主成分分析技术是首选方法,因为它以数据为导向,在驱动指标权重时消除了主观性。
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引用次数: 1
Green Concrete: An Eco-Friendly Alternative to the OPC Concrete 绿色混凝土:OPC混凝土的环保替代品
IF 3.3 Pub Date : 2022-12-07 DOI: 10.15282/construction.v2i2.8710
Dr. Ahmad Fuzail Hashmi, M.S. Khan, M. Bilal, M. Shariq, A. Baqi
The popularity of concrete has resulted in the considerable consumption of natural resources and significant emission of CO2 gas into the atmosphere. The key constituents of the concrete are the cement and the natural aggregates. These major concrete elements are recommended to be replaced with other materials to solve sustainability issues. Hence, by-products like pulverized granular blast-furnace slag, fly ash, rice husk ash, silica fume, recycled coarse aggregates etc., are added to the concrete to utilize the waste products and produce sustainable concrete. Cement manufacturing accounts for 8 to 10% of total global CO2 emissions. The construction industry is progressively adopting green concrete use in buildings because of its inherent benefits and limitations of traditional concrete. Green concrete is available in a variety of forms such as high-volume fly ash concrete, alkali-activated concrete, recycled aggregate concrete, ultra-high performance concrete, geopolymer concrete etc. Green concrete has various environmental, technical, and economic advantages i.e.,  greater durability, enhanced workability, and pumpability, decreased permeability, controlled bleeding, higher acid resistance, and decreased plastic shrinkage cracking. These properties encourage faster concrete production, shorter curing times, lower construction costs, earlier project completion, lower maintenance costs, and longer service life of construction projects. This review article aims to comprehensively explain the fresh, hardened, and durability properties of green concrete and knowledge gaps in green concrete. The literature revealed that further research is needed to accurately assess the long-term properties, notably creep and shrinkage behaviour of structural or reinforced elements of green concrete.
混凝土的普及导致了大量的自然资源消耗和大量的二氧化碳气体排放到大气中。混凝土的主要成分是水泥和天然骨料。建议用其他材料代替这些主要的混凝土元素,以解决可持续性问题。因此,在混凝土中加入颗粒状高炉渣粉、粉煤灰、稻壳灰、硅灰、再生粗骨料等副产品,利用废料生产可持续混凝土。水泥制造业占全球二氧化碳排放总量的8%到10%。由于传统混凝土固有的优点和局限性,建筑行业正在逐步采用绿色混凝土在建筑中的应用。绿色混凝土有多种形式,如大体积粉煤灰混凝土、碱活性混凝土、再生骨料混凝土、超高性能混凝土、地聚合物混凝土等。绿色混凝土具有各种环境,技术和经济优势,即更大的耐久性,增强的和易性和泵送性,降低渗透性,控制出血,更高的耐酸性和减少塑性收缩开裂。这些特性促使混凝土生产速度更快,养护时间更短,施工成本更低,工程完工时间更早,维护成本更低,建筑工程使用寿命更长。这篇综述文章旨在全面解释绿色混凝土的新鲜,硬化和耐久性性能以及绿色混凝土的知识空白。文献表明,需要进一步的研究来准确地评估绿色混凝土的长期性能,特别是结构或增强构件的徐变和收缩行为。
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引用次数: 8
期刊
Construction Innovation-England
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