sustainable use of materials in past and future: the...
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Sustainable use of materials in past and future: the example of Curaçao Rob van Hees
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Durability & sustainability
Durable stands for able to exist for a long time without significant deterioration
Giza pyramids
Service life
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Durability & sustainability
Sustainable means relating to, or being a method of harvesting or using a resource so that the resource is not depleted or permanently damaged
Vernacular architecture: Source of inspiration
Sustainable is more than energy: also, -materials & technology -culture & history -design
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Curaçao: some data • Climate
• Average T: 27.5 °C • Average RH: 77% • Rain: 600 mm/yr in Oct. – Dec. • Tradewind: average 7 m/s
• Ca. 150.000 inhabitants
• Size ca. 450 km2
• Dutch colony 1634 – 1954
• Plantations • Salt trade • Slave trade • Natural harbour: merchant ships
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Salt production (salt pans)
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http://curacao.memento-vivi.com/images/curacao-zoutpannen.jpg
Salt water ponds bad for irrigation (plantations) Valuable for salt trade
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Architecture and construction technology
• Monuments in Dutch style from 17th, 18th, 19th century, local influences (climate and material)
• Materials used: • Coral stone • Lime mortar • Brick (very limited) • Cliff stone (limited) • Plaster and paint
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Architectural style
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Adaptation to local resources and climate: planters’ mansions (Landhuizen’)
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High position (wind) Optimal ventilation Veranda’s
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Construction technology and materials
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Construction technology and materials
Local resources
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Aquaduct and cistern (‘waterbak’): dealing with local climate (lack of water) – nb use of materials
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Damage
Cement plasters
Latex paint
From1900: durable materials …..
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1990 - 2000: better salt resistant plasters
brick
render
location of salt crystallization
salt accumulating salt transporting
transport of salt and moisture
paint
paint
finish coat(water repellent)
base coat(open porous)
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Example project: Curaçao Synagogue
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Synagogue
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Restoration works Synagogue
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After restoration
Is restoration plaster a miracle?
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19 Scharlooweg 105: Within one year…..
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Towards a Curaçao plaster?
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Local product development: use of sand from mining company (avoid transatlantic transport)
Selection sand
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Tests in lab
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Test panels on site: Scharlooweg 51
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‘Better’ sand
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Execution in practice
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Execution – good workability is essential !
Mortar based on lime
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Local product development
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Future: better sustainability of materials and monuments through: • Use of local materials • Adapted design & • Innovation
28 Crystallisation pattern changes drastically when inhibitor is used (R)
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Vernacular and traditional architecture and construction technology of Curacao Strongly connected to landscape and available materials Very functional and sustainable Inspiration for sustainable and durable interventions Can go together with innovative materials and techniques
Conclusions
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Conclusions
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