HALMSTAD UNIVERSITY School of Business and Engineering Course : Construction management

1. HALMSTAD UNIVERSITY School of Business and EngineeringCourse: Construction management Adam Osiński Łukasz Piecyk Piotr Stolarski Material and Waste

2. Materials Management Planning of material use, material reuse, material reduction and recycling begins in the first stage of a project. Material cost control and profitability starts with a plan. Implementing it can save significant costs in materials. Successful plan relies on the skills of many professionals, from the architect and designers through project management to the trade contractors.

3. Materials management Pre-construction people involved • Architect (design for best use of standard sizes, for multiple applications and their recyclability) • Engineer (ensures appropriate structural component dimensions, quality and spacing for standard fastener and materials) • Estimator (uses latest materials takeoff technologies and exercises accuracy in estimates) • Purchaser (plan purchases and deliveries to reduce surplus and to balance materials maintenance during on-site storage versus transportation costs)

4. Materials Management Plan In this process we decide: • How building is designed and how materials are estimated • How materials are acquired, packed and transported on construction site • How the delivery schedule is designed • How contractors plan materials use and how they manage previously used materials and cuts • How waste is managed for use elsewhere or recycling rather then being discarded in a landfill

5. Material Management plan Plan consists of proceduresguidingall the professionals and tradesinvolving in the entireprocess of the construction. It istwo-phase plan : - design phase - constructionphase With foursections : • Review • Reduce • Reuse • Recycle

6. Material Management plan

7. Material Management plan • Review Reconsider design philosophies and practices. Review company’s policies regarding estimating and purchasing, and the construction site practices. Are they valid in today’s economy or procedures ? • Reduce Reduce quantities purchased as well as waste. More care taken on the jobsite and different cleanup practices could dramatically reduce waste. Create list of waste-reducing practices • Reuse • Recycle

8. Material and Waste Construction Waste - Waste materials generated by construction activities, such as scrap, damaged or spoiled materials, temporary and expendable construction materials, and aids that are not included in the finished project, packaging materials, and waste generated by the workforce.

9. Construction Waste Division by types of work: • Construction: 9% • Renovation: 38% • Demolition: 53%

10. Construction Waste Division by materials: • Concrete and rubble: 40% to 50% • Wood: 20% to 30% • Drywall: 5% to 15% • Asphalt roofing: 1% to 10% • Metals, Bricks and Plastics: 1% to 5%

11. How to reduce quantity of wastes? • Be efficient in area and volume. Try to use only that much material what is needed to accomplish project • Where possible, select construction systems that do not require temporary support, or other materials that will be disposed of as debris during the project. • Where possible, select materials that do not rely on adhesives, which create packaging waste. Furthermore, adhesives inhibit salvage and recycling at the end of the component's or building's life. • Try to avoid materials which are sensitive to damage

12. How to reduce quantity of wastes? • Perform multiple functions with one material rather than requiring multiple materials to perform one function • Try to use standard material and product dimensions, without cutting, where it is not necessary • Where possible, reduce requirements for applied finishes, laminates, coatings, adhesives, and the associated scrap, packaging, and waste

13. Steps to control quality and minimize the losses in materials • General description of the site: included the name of the company, the name of the site manager, gross floor area, construction schedule, list of documents provided by the company • Measurement of work completed • Control of material deliveries and withdrawals before transporting: included the specifications and quantities of materials, based on documents provided by the company • Measurement of inventories

14. Steps to control quality and minimize the losses in materials • Control of material deliveries and withdrawals after transporting: included the date, specifications, and actual quantities of materials delivered or withdrawn • Observation of material unloading, transportation, and storage conditions • Observation of the production processes: included the preparation and use of materials • Measurement of final dimensions of building components

15. Material and Waste

16. Material and Waste

17. Cost of Waste Original cost of material + Delivery cost + Handling cost + Management cost + Cleanup cost + Waste hauling cost + Tipping fee --------------------------------------------------------- = Total cost of construction waste

18. References • http://www.wbdg.org/resources/cwmgmt.php • http://mlsoc.editme.com/files/hutchpubstoreview/Material%20Waste%20in%20Building%20Industry_Main%20Causes%20and%20Prevention.pdf • http://doc.utwente.nl/20835/1/Journal20.pdf • http://www.aiahouston.org/cote/AIA%20COTE%20CMMG.pdf