Demolition of Structures containing Asbestos Rak Repair Methods of Structures, exercise (4 cr) Esko Sistonen

dust asbestos creosote PCB lead noise shake chemicals low Light biological Factors risk of falling tip-over Hazard hoisting demolition work tamping work risk of fire danger of explosion Safety risk factors at repair of construction

Asbestos The most common old harmful substance found in the building materials (in 1920 to 1990) Improve the strength of the material, wear resistance, thermal insulation, fire resistance and acoustic properties Banned the use of asbestos in Finland 1994 Asbestos fibers are harmful if migrated into the airways and lungs Is not removed from organs Asbestos-related diseases: lung cancer and asbestosis

Demolition work preliminary examinations asbestos hazardous waste frame demolition work plan demolition order supports and bindings loading of structures Protection against falling waste treatment dust and noise pollution prevention check out the repaired building, you should not rely solely on research studies and plans

Asbestos Statement: -asbestos and asbestos-containing materials inventory documents examinations -inventory of asbestos-containing materials, their quantity and toxicity findings Space inventory mapping systems Structural shell mapping -Floor coverings, plasters -Heating-ventilation- system coatings mapping -Facade materials and coatings, asbestos cement roofing Structural mapping Asbestos Survey- report -Further research

Demolition process selection -dry method compartments and vacuum demolition-bag method structures, a complete demolition A wet method -water jetting method -encapsulation and coating -asbestos waste stays to its location, but it is marked as -broken lines are filled surface fixed Fig. TaATTL

Harmful substances encapsulation, or leave them to structures In some cases, harmful substances can not be removed from structures, or it is not technically and economically rational Harmful substances may then be left into structures, but it requires special technical measures for the structure, the design of which differs from the usual structural design and requires special expertise Encapsulation materials used are various types of water insulation products, polyamide film and, to some extent, the conventional building products, such as water shut-off mortars

Hazardous waste survey (creosote, PCBs, lead, etc.): -It is natural to do the same kind of inventory as in the case of the survey of asbestos -careless handling of hazardous waste and the demolition work is harmful to the environment -building materials are rarely in themselves hazardous waste (except asbestos, creosote, PCBs, lead containing especially when the products break) -hazardous waste are generally derived from the use of the building: fluorescent tubes, adhesives, intensity discharge lamps, solvents, thermometers, CFC (refrigerators), heavy-metal batteries, polyurethane insulation, batteries, paint waste, washings, oils

Creosote or coal tar -A common water-insulating 1800 – early 1900 PAH (Polycyclic aromatic hydrocarbon) -usually found in basements (walls and floor tiles), creosote is not visible -black or dark brown goo -a bad odour, pungent (smell of crosstie or water transport channel) PCB and lead -facades sealants Keep in mind that the soil is potentially contaminated with hazardous waste!

Demolition work plan documents -demolition plan -demolition drawings -specification of demolition work -demolition work, safety notes Asbestos in the old pipe installations. -Only authorized companies are allowed to do asbestos removal work

Typical asbestos enclosure for the removal of asbestos sprayed coating from beams. tituotteet/Documents/asbesti_rakennustyossa.pdf