scholarly journals Alternative methods of delivering concrete and mortar mixes to low-rise construction projects

2021 ◽  
Vol 258 ◽  
pp. 09002
Author(s):  
Boris Zhadanovsky ◽  
Vladimir Bazanov
Keyword(s):  
Construction Projects ◽  
General Purpose ◽  
Alternative Methods ◽  
Construction Sites ◽  
Long Distance ◽  
Road Condition ◽  
Concrete Mix ◽  
Concrete Mixer ◽  
Lifting Equipment ◽  
Cement Setting

Concrete mixes are usually delivered to construction projects with the help of special vehicles. Depending on its fluidity, cement setting rate, temperature and relative humidity of carriage conditions, as well as a distance and road condition, transportation of a concrete mix may be done in concrete mixer trucks and ready-mix delivery trucks, also in buckets and hoppers mounted on vehicles (bucket trucks). At the same time, it is necessary to reduce the number of transship operations as much as possible and, wherever practicable, unload a mix directly into the structure to be concreted. Each method of transportation has its rational areas of application. For low-rise construction characterized by small volumes, scattered construction sites, insufficient coverage by a good-quality road system, and a long distance from concrete factories, it is expedient to use alternative, non-dedicated to concrete mix transportation, types of vehicles equipped with their own lifting devices. The issues of application of drop-side lorries with crane manipulators and gantry hopper trucks for transportation of ready-mix buckets are discussed. The technical characteristics of general purpose vehicles and lifting equipment are described. Recommendations concerning fitting of various types of vehicles with portable hoppers are given.

scholarly journals Infection Prevention Time Required for Construction and Design at a Large Tertiary-Care Hospital, 2019

2020 ◽  
Vol 41 (S1) ◽  
pp. s69-s70
Author(s):  
Angie Dains ◽  
Michael Edmond ◽  
Daniel Diekema ◽  
Stephanie Holley ◽  
Oluchi Abosi ◽  
...  
Keyword(s):  
Infection Control ◽  
Patient Care ◽  
Construction Projects ◽  
Small Scale ◽  
Care Hospital ◽  
Class Iii ◽  
Construction Sites ◽  
Wide Range ◽  
Time Required ◽  
Class Iv

Background: Including infection preventionists (IPs) in hospital design, construction, and renovation projects is important. According to the Joint Commission, “Infection control oversights during building design or renovations commonly result in regulatory problems, millions lost and even patient deaths.” We evaluated the number of active major construction projects at our 800-bed hospital with 6.0 IP FTEs and the IP time required for oversight. Methods: We reviewed construction records from October 2018 through October 2019. We classified projects as active if any construction occurred during the study period. We describe the types of projects: inpatient, outpatient, non–patient care, and the potential impact to patient health through infection control risk assessments (ICRA). ICRAs were classified as class I (non–patient-care area and minimal construction activity), class II (patients are not likely to be in the area and work is small scale), class III (patient care area and work requires demolition that generates dust), and class IV (any area requiring environmental precautions). We calculated the time spent visiting construction sites and in design meetings. Results: During October 2018–October 2019, there were 51 active construction projects with an average of 15 active sites per week. These sites included a wide range of projects from a new bone marrow transplant unit, labor and delivery expansion and renovation, space conversion to an inpatient unit to a project for multiple air handler replacements. All 51 projects were classified as class III or class IV. We visited, on average, 4 construction sites each week for 30 minutes per site, leaving 11 sites unobserved due to time constraints. We spent an average of 120 minutes weekly, but 450 minutes would have been required to observe all 15 sites. Yearly, the required hours to observe these active construction sites once weekly would be 390 hours. In addition to the observational hours, 124 hours were spent in design meetings alone, not considering the preparation time and follow-up required for these meetings. Conclusions: In a large academic medical center, IPs had time available to visit only a quarter of active projects on an ongoing basis. Increasing dedicated IP time in construction projects is essential to mitigating infection control risks in large hospitals.Funding: NoneDisclosures: None

Video surveillance and analytics technologies in the safety management system in construction projects realization

2020 ◽  
pp. 41-51
Author(s):  
Pavel Kurochkin
Keyword(s):  
Video Surveillance ◽  
Management System ◽  
Construction Projects ◽  
Safety Management ◽  
Industrial Safety ◽  
Processing Plant ◽  
Labor Protection ◽  
Construction Sites ◽  
Gas Processing ◽  
Design And Implementation

Pavel Kurochkin, manager of labor protection, industrial safety and ecology at NIPIGAS company, talks about the realization of the NIPIGAS project for the construction of the Amur gas processing plant for LLC Gazprom pererabotka Blagoveshchensk and about the design and implementation of preparatory works for the construction of the Amur gas-chemical plant for LLC SIBUR. New approaches to labor protection and safety, which are used at NIPIGAZ construction sites, make it possible to control the safety of work at heights and in inaccessible places and to monitor construction and installation works using video surveillance technologies and video analytics.

Quantification Methods for Construction Waste Generation at Construction Sites: A Review

2010 ◽  
Vol 163-167 ◽  
pp. 4564-4569 ◽  
Author(s):  
Ahmad Firman Masudi ◽  
Che Rosmani Che Hassan ◽  
Noor Zalina Mahmood ◽  
Siti Nazziera Mokhtar ◽  
Nik Meriam Sulaiman
Keyword(s):  
Construction Projects ◽  
Software Tool ◽  
Waste Reduction ◽  
Building Construction ◽  
Civil Infrastructure ◽  
Waste Generation ◽  
Construction Sites ◽  
Construction Waste ◽  
Future Direction ◽  
User Friendly

Estimation of construction and demolition (C&D) waste amount is crucial for implementing waste minimization program. Estimation of C&D waste amount generated is a mean in assessing the potential for waste reduction. Thus, a better understanding of C&D waste generation in terms of causes and sources can be achieved. The aim of this paper is to conduct a review on available construction waste quantification methods from previous studies, which have been utilized in certain countries, while attempting to choose the most suitable and applicable method, and to direct future studies for better quantification methods. This review is applicable only for building construction projects and did not include civil/infrastructure, demolition, renovation, and excavation projects. Six quantification methods and/or waste audit tool available from literatures are discussed, which include their limitation and future direction for this study. It is believed that some combination of these quantification methods could make a good impact in accurate numerical estimation of construction waste amount generated in building construction projects. A strong and accurate database as presented by Soliz-Guzman, combined with effective, vital, and resourceful estimation suggested by Jalali’s Global Index (GI), also with the aid of user-friendly software tool like the SMARTAudit could provide an effective and reliable waste quantification.

scholarly journals Forecasting the Project Duration Average and Standard Deviation from Deterministic Schedule Information

2020 ◽  
Vol 10 (2) ◽  
pp. 654 ◽  
Author(s):  
Pablo Ballesteros-Pérez ◽  
Alberto Cerezo-Narváez ◽  
Manuel Otero-Mateo ◽  
Andrés Pastor-Fernández ◽  
Jingxiao Zhang ◽  
...  
Keyword(s):  
Standard Deviation ◽  
Network Analysis ◽  
Construction Projects ◽  
Project Evaluation ◽  
Alternative Methods ◽  
Stochastic Network ◽  
Project Duration ◽  
Deterministic Scheduling ◽  
Mathematical Expressions ◽  
Additional Calculation

Most construction managers use deterministic scheduling techniques to plan construction projects and estimate their duration. However, deterministic techniques are known to underestimate the project duration. Alternative methods, such as Stochastic Network Analysis, have rarely been adopted in practical contexts as they are commonly computer-intensive, require extensive historical information, have limited contextual/local validity and/or require skills most practitioners have not been trained for. In this paper, we propose some mathematical expressions to approximate the average and the standard deviation of a project duration from basic deterministic schedule information. The expressions’ performance is successfully tested in a 4100-network dataset with varied activity durations and activity durations variability. Calculations are quite straightforward and can be implemented manually. Furthermore, unlike the Project Evaluation and Review Technique (PERT), they allow drawing inferences about the probability of project duration in the presence of several critical and subcritical paths with minimal additional calculation.

scholarly journals Bottom-up accountability and public service provision: Evidence from a field experiment in Brazil

2020 ◽  
Vol 7 (2) ◽  
pp. 205316802091444
Author(s):  
Danilo Freire ◽  
Manoel Galdino ◽  
Umberto Mignozzetti
Keyword(s):  
Public Service ◽  
Service Provision ◽  
Construction Projects ◽  
Service Performance ◽  
Policy Outcomes ◽  
School Construction ◽  
Construction Sites ◽  
Bottom Up ◽  
Mobile Phone Application ◽  
The Impact

Does local oversight improve public service delivery? We study the effect of a mobile phone application that allows citizens to monitor school construction projects in Brazilian municipalities. The app prompts users to submit data about construction sites, sends such crowdsourced information to independent engineers, and contacts the mayors’ offices about project delays. Our results show that the app has a null impact on school construction indicators. Additionally, we find that politicians are unresponsive to individual requests. The results question the impact of bottom-up monitoring on public service performance and suggest that interventions targeted at other groups, or focused on different issues, may produce better policy outcomes.

scholarly journals Assessment of Lean Construction Practice at Selected Construction Sites in Klang Valley

2018 ◽  
Vol 7 (4.35) ◽  
pp. 125
Author(s):  
Mohammed Elhaj Alsoufi Mohammed Ahmed ◽  
Leong Sing Wong
Keyword(s):  
Construction Projects ◽  
Management Strategies ◽  
Health And Safety ◽  
Lean Construction ◽  
Building Construction ◽  
Total Quality ◽  
Construction Sites ◽  
Construction Techniques ◽  
Comprehensive Survey ◽  
Klang Valley

Lean construction is known to reduce costs, improve profit or increase competitiveness, increase business opportunity and customer base, improve health and safety, improve quality, yield higher employee salaries, shorten production timescales and increase customer satisfaction. With little attention on research of lean construction in Malaysia, it remains a problem of non-standardization in waste elimination strategies thereby sub optimizing waste management in Malaysian construction projects. The objective of this paper is to evaluate lean construction techniques and measure the feasibility in term of their applicability for construction at selected sites in Klang Valley, Malaysia. The study is novel and significant in a sense that it can help to develop reliable management strategies for implementing lean construction technologies at the construction sites. Case studies were carried out as a strategic method and comprehensive survey that covers both questionnaire and interview were adopted as a method of data collection. Likert scale 1 to 5 was used in the written questionnaire with workers in order to assess the level of awareness and acceptance on the need of lean construction techniques for eight construction sites in various places and with various categories (infrastructure and building construction projects) in Klang Valley, Malaysia. Later, semi structural interview was conducted with expert judgment to justify the factors which affect the implementation of lean construction at the construction sites. From the study outcome, it was discovered that both Total Quality Management (TQM) and Industrialized Building System (IBS) were rated by the respondents to be highly effective in both infrastructure and building construction projects.

scholarly journals ACHIEVING SAFETY AND PRODUCTIVITY IN CONSTRUCTION PROJECTS

2015 ◽  
Vol 23 (2) ◽  
pp. 311-318 ◽  
Author(s):  
Rafiq Muhammad CHOUDHRY
Keyword(s):  
Statistical Analysis ◽  
Construction Industry ◽  
Construction Projects ◽  
Response Rate ◽  
Practical Knowledge ◽  
Project Managers ◽  
Hard Copy ◽  
Construction Sites

Improvement of safety and productivity are major concerns throughout the construction industry. There is a dearth of efforts that document the need for simultaneous achievement of safety and productivity on construction sites. The objective of this research is to investigate productivity and safety simultaneously on construction projects by con­ducting a survey. In total, 1,800 hard-copy questionnaires were distributed and the response rate was 81%, resulting in 1,454 valid questionnaires for analysis. Safety and productivity were investigated on 25 construction projects by means of statistical analysis. The results indicated that eleven of the fifteen significant findings pertained to safety and the rest to productivity. The results confirmed that it is possible to improve productivity and safety simultaneously on construc­tion projects. All measures were found to be correlated with both safety and productivity. The findings of this research provide practical knowledge to project managers and safety practitioners on construction projects to achieve safety and productivity simultaneously. The methodology of research might be useful for research at other construction projects in other regions and cultures.

scholarly journals BIM-Based Construction Information Management Framework for Site Information Management

2018 ◽  
Vol 2018 ◽  
pp. 1-14 ◽  
Author(s):  
Dong-Gun Lee ◽  
Ji-Young Park ◽  
Sang-Hoon Song
Keyword(s):  
Information Management ◽  
Construction Projects ◽  
Database System ◽  
Construction Sites ◽  
Comprehensive Management ◽  
Different Types ◽  
Structured Information ◽  
Categorization System ◽  
The Individual ◽  
Types Of Information

Projects in the construction industry are becoming increasingly large and complex, with construction technologies, methods, and the like developing rapidly. Various different types of information are generated by construction projects. Especially, a construction phase requires the input of many resources and generates a diverse set of information. While a variety of IT techniques are being deployed for information management during the construction phase, measures to create databases of such information and to link these various different types of information together are still insufficient. As such, this study aims to suggest a construction information database system based on BIM technology to enable the comprehensive management of site information generated during the construction phase. This study analyzed the information generated from construction sites and proposed a categorization system for structuring the generated information, along with a database model for storing such structured information. Through such efforts, it was confirmed that such a database system can be used for accumulating and using construction information; it is believed that, in the future, the continual accumulation and management of construction information will allow for corporate-level accumulation of knowledge as opposed to the individual accumulation of know-how.

scholarly journals Achieving Sustainable Procurement in Construction Projects: The Pivotal Role of a Project Management Office

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Mahmoud Ershadi ◽  
Marcus Jefferies ◽  
Peter Davis ◽  
Mohammad Mojtahedi
Keyword(s):  
Project Management ◽  
Literature Review ◽  
Construction Projects ◽  
Ecological Impacts ◽  
Construction Sites ◽  
Theoretical Understanding ◽  
Sustainable Practices ◽  
Sustainable Procurement ◽  
Project Procurement

Environmental and ecological impacts associated with construction activities have become an ever-increasing concern, especially the considerable amount of waste generated on construction sites. Regulations and growing client pressure on meeting environmental standards have led contractors to adopt sustainable practices and try to embed this concept in their processes. Sustainable procurement management (SPM) as a potential solution takes the environmental consequences of procurement decisions into account and integrates sustainable practices into project procurement to bring positive environmental outcomes. Previous research has mainly focused on the public sector in achieving green procurement, yet this study attempts to highlight internal capacities that help private organisations manage the requirements associated with practicing sustainability. It is theorised that robust management structures, specifically project management offices (PMOs), would enhance the oversight capabilities of contractors in implementing the SPM process. The objectives of the current study are to (1) identify the requirements of a sustainable project procurement process in construction sites based on a literature review, and (2) explore the facilitative role of PMO units in achieving these requirements in the private sector. A literature review was conducted followed by a qualitative survey to solicit the viewpoints of construction professionals in principle contracting firms. As a result of the study, we identified 17 sustainability requirements and found that PMOs boost collaboration and improve the quality of decision making towards sustainable procurement. The findings (1) explain how PMOs support sustainability, (2) provide insights on implementing sustainable practices in project purchases, and (3) improve theoretical understanding of the SPM principles. 

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