Rammed earth construction process

How is rammed earth walls constructed?

As the name implies, rammed earth construction involves the use of compressed earth . A mixture of earth consisting of the right amount of sand, gravel and clay is poured into a mould or formwork. This earth mixture is rammed until it becomes rock solid.

What makes rammed earth construction different than normal adobe construction?

There are several ways to build a home out of earth , including adobe . Adobe , which is also a mixture of dirt and clay, requires more moisture in the mix than rammed earth . Rammed earth walls harden in the form, so that when the form is removed, the wall is already standing in place.

How long does it take to build a rammed earth house?

How long did it take to build the walls? There were about 28 walls in the house – this included short walls, window walls and non structural walls. In terms of ramming days it took about 25 days as we were able to build two walls in one day on several occasions.

Is rammed earth strong?

Is rammed earth stronger or more durable than concrete? Rammed earth has an inherent beauty that transmits a warmth and natural character very different from concrete. Rammed earth walls are typically much thicker than a concrete wall, which makes them much more effective at controlling indoor temperature fluctuations.

How long do rammed earth walls last?

A Rammed earth house can easily sustain its integrity for 1000+ years. Primary factors affecting the cost of any project are design and site characteristics.

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Is Rammed Earth cheap?

Both traditional rammed earth and CSRE have several characteristics that make them an attractive choice of building material. The main ingredient is soil, which is cheap (if not free). And finally, the final texture of rammed earth walls is unique and beautiful, so they typically do not need any plaster or render.

What is rammed earth used for?

Rammed earth , building material made by compacting certain soils, used by many civilizations. The most durable of the earth -building forms, rammed earth may be used for making building blocks or for constructing whole walls in place, layer by layer. In making building blocks, the soil is rammed into a box-shaped mold.

Is rammed earth fire resistant?

Rammed earth walls require no ongoing maintenance and are practically permanent due to their strength and durability. Its strength is proven by its incredibly fireproof nature, making it a recommended building material for fire prone areas by the Building Code of Australia. As well as its termite resistant qualities.

What is the R value of rammed earth?

Rammed Earth Stabilized Rammed Earth
Compressive Strength 1mPa – 3mPa 145psi – 435psi 3mPa – 7mPa 435psi – 1,015psi
R – value (static) R6 R6
R – value (dynamic) R9 – R13.5 R9 – R13.5
Erosion Resistance A garden hose erodes this Garden hose resistant

How much does it cost to build a rammed earth home?

Cost per m2 for a rammed earth home The price range for the full build (to completion) on average can fall between $2,200 per m2 to $3,000 per m2. The final cost per m2 for a high quality fit-and-finish custom rammed earth home can vary greatly. Depending on size, design, finishes etc.

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Does rammed earth need rebar?

Rammed earth walls are reinforced with rebars in areas of high seismic activity. Adding cement to soil mixtures low in clay can also increase the load-bearing capacity of rammed – earth edifices.

Does rammed earth need insulation?

In climates with long periods of consistent cold or consistent heat, insulation is necessary even in thick exterior earthen walls. The effect of adding insulation to a Watershed Block wall or a rammed earth wall is highly debated, especially in environments most appropriate to thermal flywheel heating and cooling.

Can you paint rammed earth?

Rammed earth walls are extremely low maintenance. However, if you do want a different finish, rammed earth walls can be treated in the same way as other masonry walls. You can cover them by applying plaster or render, or paint directly onto the surface.

Can rammed earth be recycled?

A sustainable and renewable solution As the main ingredient in both traditional rammed earth and CSRE is soil , it is easily obtainable and can be reused, or recycled once the structure has reached the end of its life (which can often span hundreds of years depending on the structure).

How thick is a rammed earth wall?

300mm