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Construction wastes have become a pressing issue in many developing countries and have adverse effects on environment, economy and social aspects. Illegal dumping is a common issue created from the physical construction waste and besides that non physical waste like cost and time overruns are not properly addressed among the construction players. This paper explores the impacts of construction on sustainable construction and contributing causes which will help the practitioners to formulate ways in avoiding or reducing the waste. It also highlights the sustainable approach in managing the construction waste as practice.

Delays that occur on a construction projects can cause project performance inefficiencies and can even add to the project cost. Factors due to project delays consist of many things that can cause project delays. This study aims to find a top ten similarity factor that causes delays in a construction projects based on the results of research in Jakarta construction projects against previous studies in other countries. From a total of 100 distributed questionnaires, 88 (88%) were filled in correctly and returned as data analysis material. The Data from the survey results were analyzed using Statistical Software Package (SPSS) to produce a ranking for Project Delay Factor. The ranking of the study was then re-analyzed based on the similarity of the previous research so that the similar Project Delay Factor Ranking was obtained.

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The dynamic response of pavement plates to a localized Friedlander load based on the threeparameter foundation model with the account of soil inertia is analyzed. The pavement plate is represented by a thin orthotropic plate of finite dimensions, which can rotate and transfer deformation along the contour. The subgrade is simulated with the Pasternak foundation model, including the inertia soil factor, the localized dynamic load is simulated with the Friedlander decay function allowing for the positive and negative phases; with the time distribution described by the Dirac function. The governing equation of the problem is solved with the modified Bolotin method for determining the natural frequencies and mode numbers of the system. The Mathematica program is used to define the natural frequencies of the system from the transcendental equations. Analysis results for several parameters related to the dynamic response of plates to a localized dynamic load, which includes both positive and negative phases, are presented. The impact of the Friedlander load with the negative phase added on the response of the pavement plate is numerically simulated.

A numerical simulation of a moving vehicle on the rigid roadway pavement with discontinuities is presented in this paper by using the data from one of the toll road segments in Indonesia. The analysis procedure considers the dynamic interaction between the vehicle and the rigid pavement. The rigid roadway pavement is modeled using the Kirchhoff theory of thin slab on elastic foundations. The aim of the numerical analysis is to obtain the vertical deflection in the middle of the slab, to obtain the time history of the slab deflection; and to identify the parameters of the sub-grade that has a significant effect on the dynamic response of the rigid roadway pavement. The equations of motion are derived in the form of partial differential equations of the fourth order. The mode shapes of the slab deflection are determined from the method of first and the second auxiliary equations of Levy-type in the-and-directions, which is also known as the Modified Bolotin Method (MBM). The equations of motion are solved numerically by using Mathematica. The influence of various parameters including the peak vertical velocity due to the moving vehicle, the stiffness of subgrade, the slab thickness and the road profile to the dynamic behavior of the rigid roadway pavement are studied in detail. The results obtained from the plate computing model in this paper are then compared and analyzed with the results computed using the finite element method by Strand 7 to show that the solution obtained using the MBM method is accurate. In addition, the paper aims to show that the thickness of the plate plays a significant role in the distribution of the bending stresses in plate discontinuities and is necessary for engineers to design rigid roadway pavements.

Construction consulting companies of today are a part of what has been called the knowledge society. The reason behind this name is the increasing importance of intangible assets as the major source of wealth creation in construction industry. As such, Knowledge Management (KM) has become a critical concern for construction consulting companies to improve project performance. The purpose of this paper is to analyse Malaysian practitioner's perception on KM in the construction consulting companies. The finding of this study was based on an analysis of transcribed data from semi-structured interviews conducted on Malaysian practitioners in the construction consulting companies to identify pattern and themes accordingly. The findings of the study indicate that all participants have expressed the significant contributions of KM to their success as a professional construction consultant in Malaysia. These participants shared a common characteristic of being professional in construction industry such as they agreed that manage database (data record) and filing system is perceived as important and also the professionals must build extensive social and business networks both locally and overseas that were relevant and have impact on their business success. The professionals have a personal desire to learn and they preferred to learn informally from a variety of people that they can access usually through discussion, seminar/conference and media. Learning from personal experience and experiences from others through learn on job and mentoring were a common characteristics among all the professionals and all of them strongly prescribed that such transfer of learning's will enable one to shortcut learning and improve their knowledge. However, both internal and external environmental factors have equal impact on the transfer of knowledge in construction consulting companies. Internally, personal interest has the biggest impact followed by culture, commitment from management, incentive or reward for the staff and openness or willingness (more on trust) to share and listen. Vol. 3, No. 7 Modern Applied Science 104 Externally, business factor/competition has the biggest impact on transfer of knowledge in construction consulting companies.