Abstract
Material waste is a term from the amount of waste material percentage and is one of the serious problems in the implementation of road construction project. The research objective is to calculate the average percentage of waste material in road construction projects and obtain waste material influencing profit and make a regression model of % material waste to % profit contractors. The data obtained are 158 projects in East and North Kalimantan divided into 51 road building projects and 107 road improvement projects. The percentage of waste material on road building project is B aggregate as the largest (26%) and ready mix concrete (5.3%) as the smallest. The percentage of waste material on road improvement project is B aggregate as the largest (24.2%) and ready mix concrete (6.14%) as the smallest. The influencing waste material on the road construction project is B aggregate, lean concrete and ready mix concrete with regression equation to determine the estimated % profit contractor as a function of % material waste is Y = 7.363 -0.032 X3 - 0.078 X4 - 0.066 X6. The influenced waste material on road improvement projects are cement, B aggregate, and Land Fill with the regression equation to determine the estimated % profit of contractor as a function of % material waste is Y = 8,702- 0,037 X4- 0,054 X5- 0,044 X7.
Highlights
IntroductionWaste in the construction field can be interpreted as a loss or a loss of material resources, time (with regard to labor and equipment) and capital, which is caused by activities that cost money, directly or indirectly, but does not add value to end product for users of construction services
Waste in the construction field can be interpreted as a loss or a loss of material resources, time and capital, which is caused by activities that cost money, directly or indirectly, but does not add value to end product for users of construction services
The study was conducted from January 2015 to September 2015; (b) Recent research on road projects in the Ring Road 3 East Kalimantan shows that the largest waste is aggregate B, sand, A aggregate respectively by 20% followed by the rebars by 10% S Aggregate by 5%, ready mix concrete by 4 % and lean concrete by 1%
Summary
Waste in the construction field can be interpreted as a loss or a loss of material resources, time (with regard to labor and equipment) and capital, which is caused by activities that cost money, directly or indirectly, but does not add value to end product for users of construction services. Waste material is a term from the large percentage of waste material occurs and is one of the serious problems in the implementation of the road construction project. United States concluded that the major contributor of waste is from the construction of roads and bridges by 123 million tons. Construction materials is an important component in determining the cost of a project, more than half of the project cost is absorbed by the material used. Material waste that occurs in the execution of construction is quite high and extremely difficult to measure systematically. At the implementation phase of construction material the use of waste materials in the field is frequently large that the effort to memimize waste material is necessary to be applied. There are two types of government project: (1) Road improvement project means there has been road, but the asphalt and surface layer have been eroded; (2) The road building project is the construction of a new road [1]-[10]
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