One of the new directions in self-compacting concrete (SCC) research is the modification of its composition with the addition of nanoparticles, which due to their unique properties are believed to improve the mechanical properties of cementitious composites. An important issue concerning the mechanical behavior of concrete under compression load is the failure process. At the moment, however, there is no knowledge of the effect of nanoparticles on the failure process of compressed SCC. The aim of the work is to investigate the failure process of compressed self-compacting concrete based on coarse and fine granite aggregate made both without and with SiO 2 nanoparticles in the amount of 2.0% and 4.0% of the cement weight. The research includes the determination of the levels of the initial cracking stresses σ i and the critical stresses σ cr that delimit individual stages of the studied process. Investigations were carried out using the acoustic emission (AE) method, and during the tests the recorded descriptors were the sum of counts (N c ) and the average effective value of the acoustic emission signal (RMS). The paper shows that the addition of SiO 2 nanoparticles has a positive effect on the failure process of compressed SCC. Moreover, the practical aspect of the obtained results for engineering purposes is provided.
{"title":"Assessment of the Failure Process of Self-Compacting Concrete Modified With SIO2 Nanoparticles by Acoustic Emission Method","authors":"Paweł Niewiadomskia, J. Hola","doi":"10.3311/ccc2019-014","DOIUrl":"https://doi.org/10.3311/ccc2019-014","url":null,"abstract":"One of the new directions in self-compacting concrete (SCC) research is the modification of its composition with the addition of nanoparticles, which due to their unique properties are believed to improve the mechanical properties of cementitious composites. An important issue concerning the mechanical behavior of concrete under compression load is the failure process. At the moment, however, there is no knowledge of the effect of nanoparticles on the failure process of compressed SCC. The aim of the work is to investigate the failure process of compressed self-compacting concrete based on coarse and fine granite aggregate made both without and with SiO 2 nanoparticles in the amount of 2.0% and 4.0% of the cement weight. The research includes the determination of the levels of the initial cracking stresses σ i and the critical stresses σ cr that delimit individual stages of the studied process. Investigations were carried out using the acoustic emission (AE) method, and during the tests the recorded descriptors were the sum of counts (N c ) and the average effective value of the acoustic emission signal (RMS). The paper shows that the addition of SiO 2 nanoparticles has a positive effect on the failure process of compressed SCC. Moreover, the practical aspect of the obtained results for engineering purposes is provided.","PeriodicalId":231420,"journal":{"name":"Proceedings of the Creative Construction Conference 2019","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114559307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The construction industry is facing a gradual but important transformation towards more productivity and collaboration. In this framework, two major approaches are often cited in the literature as having the potential to improve the practices in the industry: Building Information Modeling (BIM) and Lean Construction. Several scientific studies have demonstrated the synergy of these two approaches and very recent research has reported positive results from the use of software applications as support for their implementation on construction sites. However, the stakes of such integration have been very little studied. This article presents the results of a research project conducted within a general contractor firm that decided to implement BIM and Last Planner System (LPS) on its construction sites. The research uses a four-stage action research approach, including the characterization of the research issue, the establishment of an action plan, its implementation and its evaluation. Compared to recent related studies, the research is less enthusiastic. While it highlights the need for new tools to improve production planning and control, it also points to a strong resistance to change by practitioners at the site. They emphasize the necessity for adequate pre-service training and the need for new resources that can work full-time on the ongoing training of site teams. In addition, some limitations of the tool lead workers to believe that it can quickly become a factor that slows down their daily work rather than improving it.
{"title":"Combining BIM and Last Planner on Construction Sites: an Investigation of the Related Challenges","authors":"Yaya Pitti, Conrad Boton, D. Forgues","doi":"10.3311/CCC2019-113","DOIUrl":"https://doi.org/10.3311/CCC2019-113","url":null,"abstract":"The construction industry is facing a gradual but important transformation towards more productivity and collaboration. In this \u0000framework, two major approaches are often cited in the literature as having the potential to improve the practices in the industry: \u0000Building Information Modeling (BIM) and Lean Construction. Several scientific studies have demonstrated the synergy of these \u0000two approaches and very recent research has reported positive results from the use of software applications as support for their \u0000implementation on construction sites. However, the stakes of such integration have been very little studied. This article presents \u0000the results of a research project conducted within a general contractor firm that decided to implement BIM and Last Planner \u0000System (LPS) on its construction sites. The research uses a four-stage action research approach, including the characterization of \u0000the research issue, the establishment of an action plan, its implementation and its evaluation. \u0000Compared to recent related studies, the research is less enthusiastic. While it highlights the need for new tools to improve \u0000production planning and control, it also points to a strong resistance to change by practitioners at the site. They emphasize the \u0000necessity for adequate pre-service training and the need for new resources that can work full-time on the ongoing training of site \u0000teams. In addition, some limitations of the tool lead workers to believe that it can quickly become a factor that slows down their \u0000daily work rather than improving it.","PeriodicalId":231420,"journal":{"name":"Proceedings of the Creative Construction Conference 2019","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121967326","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Okakpu, A. Ghaffarianhoseini, J. Tookey, J. Haar, Amirhosein Ghaffarianhoseini, A. Rehman, Tongrui Zhang, Dat Tien Doa
Uptake of Building Information Modelling (BIM) for complex refurbishment projects is foreseen as an essential resolution which will possibly increase the BIM adoption rate and eventually play a major role in transforming the construction industry. This anticipation is primarily based on the success of BIM with regards to complex construction operations, management, performance and productivity improvement. Various architecture, engineering and construction (AEC) key players have promoted the adoption of BIM and highlighted its significance in enhancing project delivery. Despite the envisaged benefits and feasibility of BIM adoption for complex refurbishment projects, many small and medium enterprises (SME) are still reluctant towards BIM. Though the incorporation of BIM in the New Zealand context is also similarly expected to move the construction industry forward, little has been reported in the literature to address the impact of refurbishment project attributes towards BIM adoption. A case study of tertiary education multipurpose facility project is adopted. Semi-structured interviews were conducted with informed project stakeholders and BIM experts outside the project based in New Zealand with the aim to identify refurbishment projects attribute and how it contributes to BIM adoption barriers for refurbishment project stakeholders in the construction industry in New Zealand. The benefit of this study is that it leverages the traditional refurbishment practice towards being BIM capable, and thus enable BIM uptake for refurbishment project stakeholders at the pre-maturity stage in New Zealand tertiary institutions.
{"title":"Rethinking the Complex Refurbishment Project Attributes for Building Information Modelling (BIM) Adoption","authors":"A. Okakpu, A. Ghaffarianhoseini, J. Tookey, J. Haar, Amirhosein Ghaffarianhoseini, A. Rehman, Tongrui Zhang, Dat Tien Doa","doi":"10.3311/ccc2019-123","DOIUrl":"https://doi.org/10.3311/ccc2019-123","url":null,"abstract":"Uptake of Building Information Modelling (BIM) for complex refurbishment projects is foreseen as an essential resolution which will possibly increase the BIM adoption rate and eventually play a major role in transforming the construction industry. This anticipation is primarily based on the success of BIM with regards to complex construction operations, management, performance and productivity improvement. Various architecture, engineering and construction (AEC) key players have promoted the adoption of BIM and highlighted its significance in enhancing project delivery. Despite the envisaged benefits and feasibility of BIM adoption for complex refurbishment projects, many small and medium enterprises (SME) are still reluctant towards BIM. Though the incorporation of BIM in the New Zealand context is also similarly expected to move the construction industry forward, little has been reported in the literature to address the impact of refurbishment project attributes towards BIM adoption. A case study of tertiary education multipurpose facility project is adopted. Semi-structured interviews were conducted with informed project stakeholders and BIM experts outside the project based in New Zealand with the aim to identify refurbishment projects attribute and how it contributes to BIM adoption barriers for refurbishment project stakeholders in the construction industry in New Zealand. The benefit of this study is that it leverages the traditional refurbishment practice towards being BIM capable, and thus enable BIM uptake for refurbishment project stakeholders at the pre-maturity stage in New Zealand tertiary institutions.","PeriodicalId":231420,"journal":{"name":"Proceedings of the Creative Construction Conference 2019","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130906924","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This article presents the mind mapping technique which, despite many potential benefits, is still infrequently used in project management. The case study provides practical examples for use of the mind mapping technique when implemented in construction projects. The results of this study showed that the mind mapping technique helps project managers solve problems, define the scope of a project, schedule packages, and manage teams more effectively. Further, mind maps are useful for creating project plans, and for analysing existing plans so that they are easily understandable. This study concludes that the mind mapping technique is a creative and useful tool for project managers. The mind mapping technique enables the project manager to gather, manage, share, and communicate information quickly and easily.
{"title":"The Mind Mapping Technique in Project Management","authors":"M. Bochenek","doi":"10.3311/ccc2019-064","DOIUrl":"https://doi.org/10.3311/ccc2019-064","url":null,"abstract":"This article presents the mind mapping technique which, despite many potential benefits, is still infrequently used in project management. The case study provides practical examples for use of the mind mapping technique when implemented in construction projects. The results of this study showed that the mind mapping technique helps project managers solve problems, define the scope of a project, schedule packages, and manage teams more effectively. Further, mind maps are useful for creating project plans, and for analysing existing plans so that they are easily understandable. This study concludes that the mind mapping technique is a creative and useful tool for project managers. The mind mapping technique enables the project manager to gather, manage, share, and communicate information quickly and easily.","PeriodicalId":231420,"journal":{"name":"Proceedings of the Creative Construction Conference 2019","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132181328","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sequencing construction activities in highway projects is a complex planning process which requires not only considerable knowledge and practical experience of the planner/scheduler about various relevant aspects, such as the activities themselves, construction and procurement processes, and construction methods, but also input from other key members of the project regarding specific constraints and requirements. Moreover, sequencing is an iterative process; the sequence developed in the planning phase is likely to change in the construction phase. Therefore, learning from as-built schedules of past completed projects is needed to improve the planning and scheduling processes for future projects. In current practices, most state Departments of Transportation (DOTs) still mainly rely on schedulers’ experience for schedule development. A data-driven systematic approach is still lacking, although the highway agencies have been spending a significant amount of money, time, and effort to collect various digital data during the construction process. This study aims to leverage historical digital daily work report data available in the DOTs’ database to detect patterns of construction sequences in highway projects. Daily work report data collected from a state DOT were used to conduct a case study that developed a Sequential Pattern Mining algorithm to extract frequent sequential relationships among the activities for one major type of highway projects. Peer-review under responsibility of the scientific committee of the Creative Construction Conference 2019.
{"title":"Mining Daily Work Report Data for Detecting Patterns of Construction Sequences","authors":"K. Shrestha, Chau Le, H. D. Jeong, Tuyen Le","doi":"10.3311/ccc2019-079","DOIUrl":"https://doi.org/10.3311/ccc2019-079","url":null,"abstract":"Sequencing construction activities in highway projects is a complex planning process which requires not only considerable knowledge and practical experience of the planner/scheduler about various relevant aspects, such as the activities themselves, construction and procurement processes, and construction methods, but also input from other key members of the project regarding specific constraints and requirements. Moreover, sequencing is an iterative process; the sequence developed in the planning phase is likely to change in the construction phase. Therefore, learning from as-built schedules of past completed projects is needed to improve the planning and scheduling processes for future projects. In current practices, most state Departments of Transportation (DOTs) still mainly rely on schedulers’ experience for schedule development. A data-driven systematic approach is still lacking, although the highway agencies have been spending a significant amount of money, time, and effort to collect various digital data during the construction process. This study aims to leverage historical digital daily work report data available in the DOTs’ database to detect patterns of construction sequences in highway projects. Daily work report data collected from a state DOT were used to conduct a case study that developed a Sequential Pattern Mining algorithm to extract frequent sequential relationships among the activities for one major type of highway projects. Peer-review under responsibility of the scientific committee of the Creative Construction Conference 2019.","PeriodicalId":231420,"journal":{"name":"Proceedings of the Creative Construction Conference 2019","volume":"491 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133769849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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