The quality perspective of the ready-mixed concrete industry in Turkey

Kazaz, Aynur; Ulubeyli, Serdar; Türker, Fikret

doi:10.1016/j.buildenv.2004.03.010

Cited by 16 publications

(9 citation statements)

References 6 publications

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“…Construction firms, therefore, need to understand the quality factors for their success in order to establish quality factors for construction firms (Saeed and Hasan, 2012). Although quality has been widely implemented in the Japanese construction 922 IJQRM 33,7 industry since the 1980s and in the American construction field since the 1990s, it has not yet been implemented successfully in developing countries (Abdel-Razek, 1998;Hiyassat, 2000;Kazaz et al, 2004;Abdel-Salam and Gad, 2009). Many studies have demonstrated that project management action is a key element in achieving quality in construction.…”

Section: Quality In Constructionmentioning

confidence: 99%

Quality in construction management: an exploratory study

Jraisat

Jreisat²,

Hattar³

2016

International Journal of Quality &Amp; Reliability Management

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Purpose – The purpose of this paper is to identify the relative importance of factors affecting quality. This is important where great expenditures of time, money, and resources are wasted each year due to inefficient or non-existent quality levels. Design/methodology/approach – An exploratory approach is employed. After a literature review, six interviews are initially conducted with construction experts and then a simple survey of 328 questionnaires was administrated through structured personal interviews among contractors and architects in the Jordanian housing sector. Findings – The findings suggest that contractors and architects combined agreed that the highest important factors affecting quality are: human resource management, customer satisfaction, and construction specific factors. The findings also suggest that strategic planning, continuous improvement, resources are the lowest important factors. A conceptual framework encompassing the key quality factors is also developed. Research limitations/implications – This research has important implications for different level managers at construction companies. By understanding the quality factors, managers can focus on the highest factors and catch up with their lowest important factors in order to maintain a balanced and integrated quality approach. Originality/value – This is one of few studies that investigate the importance of quality factors. To the authors’ knowledge, this is the first paper providing empirical evidence of the quality factors in construction management in a developing country.

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Section: Quality In Constructionmentioning

confidence: 99%

Quality in construction management: an exploratory study

Jraisat

Jreisat²,

Hattar³

2016

International Journal of Quality &Amp; Reliability Management

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“…Moreover, order additional allowance of concrete due to uncertainty of material consumption within the site, excessive dimensions of concrete foundations will also cause waste of concrete (Formoso et al, 2002). Kazaz et al, (2004) stated that, concrete waste generates at the production of poor-quality concrete with the use of extravagant raw materials. Dosho (2007) documented that, concrete waste accounts roughly 35 million tons per year of the total construction waste due to the demolition and other construction related activities.…”

Section: Introductionmentioning

confidence: 99%

“…It increases the higher productivity, lower costs with higher profits, minimize wastages, increased client's satisfaction, improved competitiveness, and continuous quality development. Kazaz et al (2004) reported that, the quality production of the ready-mix concrete will solve the problems arising when deficiencies in placing, curing and formwork for the cast in-situ concrete. Ready mix concrete plants ensure the quality of the concrete due to automatic operation compared to manually undertaking.…”

Section: Introductionmentioning

confidence: 99%

Managing Concrete Wastes by Implementing Contemporary Construction Practices in Sri Lanka

Senarathna¹,

Perera²

2021

Proceedings of the 9th World Construction Symposium 2021 on Reshaping Construction: Strategic, Structural and Cultural Transfor

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Material waste is one of the main reasons for the client to suffer due to increments in unnecessary costs. Among all construction material wastes, concrete waste highly draws expenses to the project stakeholders. As a main component in construction, the volume of the concrete waste in Sri Lankan construction projects are considerably high, when comparing with the other material wastes. Currently, most of the countries are moving towards the sustainable developments while minimizing concrete waste. Therefore, applying traditional practices to minimize concrete waste have not been successful over the years. The aim of this research study is, to minimize concrete wastes by implementing contemporary practices that assists to reduce the project cost in Sri Lankan construction industry. In order to achieve the aim, comprehensive literature review, a questionnaire survey and semi-structured interviews were conducted to gather data in both qualitative and quantitative procedures. The empirical findings revealed that concrete waste has a positive relationship with the project cost. Same time, discovered the drivers and barriers that gains while implementing contemporary practices in Sri Lanka. Concrete recycling, precast elements, lean construction techniques, value engineering methods and few more other contemporary practices were identified that leads to minimize concrete waste. The results from the interviews found that many projects are willing to implement mentioned contemporary practices within their construction projects although there are few barriers. These findings deliver a valuable evidence to the practitioners with an in-depth understanding about the essential necessity of contemporary practices to construction projects.

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“…From a global perspective, it is estimated that over 125 million tons of the returned concrete or 0.5% of the total concrete production are generated as waste every year, confirming that it is a relevant part of the construction waste issue and represents a heavy burden for RMC plants (CSI, 2009). Reasons behind the formation of the fresh concrete waste can be listed as follows, wide-margin orders of contractors' planning engineers for RMC -the amount allowed by quantity surveyors is generally about 10% more than that in project drawings (Cooke & Williams, 2004; because (i) the additional concrete may not be immediately produced especially in busy periods of a batching plant and thus some structurally undesired joints may be formed if the ordered concrete is insufficient and cannot be delivered in time and (ii) estimators find it easier to over specify rather than calculate quantities accurately (Sealey, Phillips & Hill, 2001), the incorrect calculation of quantity, which is usually based on orders given by workers instead of civil engineers (Kazaz, Ulubeyli & Turker, 2004), the poor workmanship during the concrete-pouring activity, and the residual or adhesive concrete in truckmixers (Bossink & Brouwers, 1996;Shen & Tam, 2002;Poon, Yu, Wong & Cheung, 2004).All these reasons and their numerical contributions to fresh RMC waste amounts are also being investigated under the on-going research project. This will clearly reveal the formation process of such wastes.…”

mentioning

confidence: 99%

“…This is because, in a reinforced-concrete building project, concrete can have a big share of about 10% of the total project budget (Kazaz, Ulubeyli & Turker, 2004). Of course, these amounts can be single numbers or interval-based values.…”

Section: Introductionmentioning

confidence: 99%

Fresh Ready-Mixed Concrete Waste in Construction Projects: A Planning Approach

Kazaz

Ulubeyli

et al. 2015

OTMCJ

Self Cite

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1280In the current study, how planning and truck-mixer based waste amounts per 1 m 3 fresh ready-mixed concrete (RMC) can be determined was presented. Toward this aim, the formation process of the fresh RMC waste in construction projects was first introduced in a detailed manner, together with an in-depth literature review in this specific domain of the construction engineering and management. Then, the measurement procedure of the waste amount or coefficient of the fresh RMC was revealed and discussed as a practical and creative planning knowledge. Hence, a useful and realistic waste management perspective about the cost and potential environmental savings of the RMC waste was drawn. Fresh Ready-Mixed Concrete Waste in Construction Projects IntroductionConstruction wastes not only affect the economy of a country, but also consume natural resources and pollute the environment for a very long term. According to Garvin (2004), 40-50% of the energy produced in the world and 16% of available water resources are consumed to produce construction materials defined as waste. CO2 that appears in the production process of such materials makes up 50% of the total CO2 emission in construction. Given the transportation of these material wastes, this share of 50% likely reaches up to 75%. In this environmental pollution and resource consumption, it should be noted that the cement manufacture plays an important role. In addition, construction wastes occupy large areas by volume. They have a share of approximately 20-40% of the total area occupied by wastes in the US, Canada, Hong Kong, Australia, Japan, and European Union countries (Stokoe, Kwong & Lau, 1999;Kibert, 2000;Poon, 2007). This share can likely increase further if wastes are measured in weight (Mulheron, 1988;Hendriks & Pietersen, 2000). Today, the construction industry tries to deal with enormous amounts of wastes as they are very damaging to the environment. However, it is very hard to assert that the construction industry has generally constituted and improved its waste-based business culture so far. In order to reveal the current position of the construction industry as a whole in terms of types and amounts of construction wastes, it is inevitable that various types of estimates and plans on sub-sectors of the construction industry should be carried out.In this context, how planning and truck-mixer based waste amounts per 1 m 3 fresh ready-mixed concrete (RMC) can be determined was presented in the current paper as a part of an on-going research project. This is because, in a reinforced-concrete building project, concrete can have a big share of about 10% of the total project budget (Kazaz, Ulubeyli & Turker, 2004). Of course, these amounts can be single numbers or interval-based values. This decision can be based on a statistical analysis of the real world data. Thus, while preparing their proposals, construction contractors in general and quantity surveyors and cost managers in particular can better estimate the amount and cost of RMC by means of these numeri...

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The quality perspective of the ready-mixed concrete industry in Turkey

Cited by 16 publications

References 6 publications

Quality in construction management: an exploratory study

Quality in construction management: an exploratory study

Managing Concrete Wastes by Implementing Contemporary Construction Practices in Sri Lanka

Fresh Ready-Mixed Concrete Waste in Construction Projects: A Planning Approach

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