ESTIMATION OF BUILDING WASTE FROM THE CONSTRUCTION - LCETED - LCETED Institute for Civil Engineers

Sep 11, 2020

ESTIMATION OF BUILDING WASTE FROM THE CONSTRUCTION

In this article, you can learn how to calculate the amount of construction waste that will be generated from construction projects. Based on this information, the direct cost of material waste and the consequent cost of waste disposal and treatment, for example, sorting can be calculated in order to control costs.

1. CONCRETE WASTE

The amount of concrete residue, for example, can be estimated by knowing the level of material waste from the concrete. Recent research indicates that the average level of waste is approximately 4%, which is considered the norm for the concrete trade in this guide. However, it could be reduced to 3% if careful ordering and handling of the material are applied. The amount of waste can be estimated according to:

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2. WASTE FROM BLOCKWORK AND BRICKWORK

The granular waste generated by block and brickwork is 10% of the quantity of the work required in the construction project. The estimate can be calculated as follows:

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3. WASTE FROM SCREEDING AND PLASTERING

A higher wastage of 15% is given as the norm since these trades are difficult to control. The estimate can be calculated according to:

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4. WASTE FROM TIMBER FORMWORK

The Timber formwork is assumed to have been used at least 12 times before being discarded. Wood residues can be estimated according to:

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5. PACKAGING WASTE

Construction contractors have little control over the amount of packaging waste produced, which is estimated at 5% of the volume of materials requiring packaging, therefore

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The percentage wastage by different trades for public housing projects and private residential buildings are shown in Tables 1 and 2 for reference.
Tables 1
 TABLE 1
Tables 2