How to Build a Global Model Earthship Operation II: Concrete Work
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The tire walls are staggered like traditional brick work, and often have "concrete half blocks" every other course, to equal the length of the staggered tire below. In an effort to cut down the use of concrete even further, they also use "squishies" - tires rammed in between a tight space to even out the course or to compensate for varying tire size.
The earth-rammed tires of an Earthship are assembled by teams of two people. One person shovels dirt and places it into the tire one scoop at a time. The other person, who stands on the tire, uses a sledgehammer to pack the dirt in while moving in a circle around the tire to keep the dirt even and to avoid warping the tire. Rammed earth tires can weigh up to pounds, so they are typically filled in place. Because the tire is full of soil, it does not burn when exposed to fire.
On top of the tire walls are either "can and concrete bond beams" made of recycled cans joined by concrete, or wooden bond beams with wooden shoes. These are attached to the tire walls using concrete anchors, poured blocks of concrete inside the top tires.
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Wooden shimming blocks placed on top of the wooden bond beam make up the wooden shoes. The wooden bond beam consists of two layers of lumber bolted on to the concrete anchors. Re-bar is used to "nail" the wooden shoes to the wooden bond beam.
Internal, non-load-bearing walls are often made of a honeycomb of recycled cans joined by concrete; these are nicknamed tin can walls. These walls are usually thickly plastered with adobe , and resemble traditional adobe walls when finished. The roof is made using trusses, or wooden support beams called vigas , that rest on the wooden shoes or the tin can walls placed on the bond beams.
The roof as well as the north, east and west facing walls are heavily insulated to reduce heat loss. Earthships are designed to catch all the water they need from the local environment. Water used in an Earthship is harvested from rain, snow, and condensation. As water collects on the roof, it is channeled through a silt-catching device and into a cistern.
The cisterns are positioned to gravity-feed a water organization module WOM that filters out bacteria and contaminants, making it suitable for drinking. Water is then pushed into a conventional pressure tank to create common household water pressure. Water collected in this fashion is used for every household activity except flushing toilets. The toilets are flushed with greywater which has been used at least once already.
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Typically it is filtered waste-water from sinks and showers. Greywater , recycled water unsuitable for drinking, is used within the Earthship primarily for flushing toilets. Here the water is oxygenated and filtered using bacteria and plants to reduce the nutrient load. The reclaimed water is passed once more through a greywater board and used to flush conventional toilets.
Black water is water that has been used in a toilet. Earthships utilize anaerobic digestion in their septic tanks, which naturally separate solid waste. The black water is used in concrete cells containing plants, separate from the grey water plants in the greenhouse; it may also be used in exterior planters. Studies on the safety of growing food plants in a black water system show low levels of E. It is not recommended to plant edibles in black water; building permits may be refused for plans indicating such usage of black water. Where it is not possible to use flush-toilets operating on water, dry solar toilets are recommended.
Earthships are designed to collect and store their own energy.
The majority of electrical energy is harvested from the sun and wind. Photovoltaic panels and windturbines on or near the Earthship generate DC electricity that is stored in deep-cycle batteries. The batteries are housed in a purpose-built room on the roof. Additional energy can be obtained from gasoline-powered generators or by integrating with the city grid. The Power Organizing Module is a prefabricated system provided by Earthship Biotecture that is simply attached to a wall on the interior of the Earthship and wired in a conventional manner.
It includes the necessary equipment such as circuit breakers and converters. The energy run through the Power Organizing Module can be used to run any household appliance including washing machines, computers, kitchen appliances, print machines, and vacuums.
Ideally, none of the electrical energy in an Earthship is used for heating or cooling. Earthships rely on a balance between the solar heat gain and the ability of the tire walls and subsoil to transport and store heat. They are designed to use the properties of thermal mass and with the intent that the exterior earth-rammed tire walls provide thermal mass that will soak up heat during the day and radiate heat during the night, keeping the interior climate relatively comfortable all day.
The Global Model, which incorporates the double greenhouse, is the culmination of years of experimenting and building with recycled materials. These booklets have been put together with input from the Earthship crew, who have built hundreds of these homes around the world. Overview Music Video Charts. Opening the iTunes Store. If iTunes doesn't open, click the iTunes application icon in your Dock or on your Windows desktop.
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Continue shopping Checkout Continue shopping. Chi ama i libri sceglie Kobo e inMondadori. Concrete Work Back to Nonfiction. Concrete Work by Michael Reynolds. Buy the eBook Price: Available in Russia Shop from Russia to buy this item. Or, get it for Kobo Super Points! This installment covers the concrete and steel strength of the building, including footings, buttresses and bond beam. Photographs, diagrams and thorough explanations of procedures will guide you through the concrete work phase of the building. The Global Model, which incorporates the double greenhouse, is the culmination of years of experimenting and building with recycled materials.
These booklets have been put together with input from the Earthship crew, who have built hundreds of these homes around the world. Ratings and Reviews 0 1 star ratings 0 reviews.
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