The Raw Materials of Compressed Earth Block

What are the compressed earth blocks (CEB)?

Compressed earth blocks (CEBs) are a durable, low-cost way of building a home, office, or community. CEBs can be used to make walls, floors or even a roof. The blocks are environmentally friendly, long lasting, and able to withstand the harshest weather conditions. They also have a lower embodied energy than traditional concrete and brick.

CEB compressed earth blocks

Compressed earth blocks (CEBs) are a green, environmentally friendly construction material that can be built with local resources and provide a durable, sustainable, and affordable building solution. CEBs are made from soil, aggregate, and water which is compressed to produce blocks. These blocks can be used as a replacement for traditional materials such as cement, wood, brick or block.

What is the best soil for CEB?

The soil includes the 75% sandy soil, and 25% clay soil is perfect. You can add 4% to 8% Portland cement to ensure the strength of the compressed block.

The best ratio of CEB is: 92-96% soil and 4-8% cement.

If the soil has high clay, you need to add the more sandy soil.

If the soil has high sandy soil, you need to add some clay.

The ideal soil: sand:80%. Silt: 10%, clay: 10%

The good soil: sand:65-80%. Silt:0-20%, clay: 10-20%

The Soil Content:

Ideal Soil80%10%10%
Good Soil65-80%0-20%10-20%


How to determine if your soil is sandy soil?

Sandy soil refers to soil that contains sand gravel. Sandy soil consists of fine particles of limestone, granite, and quartz formed by erosion, weathering, and fragmentation.

You need to perform a simple squeeze test. You grab a handful of soil that is not very moist, and then squeeze it into a ball to see if the soil can completely form a block or a ball. Sandy soil will not clump, and if sand If the content is too large, the soil will run away from you.


Most soils have three parts, namely sand, silt, and clay. Sand has the largest soil particle size, silt has a soil particle size between clay and sand, and clay has the smallest particle size.

Sand refers to grains with a particle size of 0.074~2mm that are washed by rain or rolled from the rock after weathering.

The type of soil can also be distinguished. The soil with more than 85% of the size of sand is called sandy soil.


What are the advantages of compressed earth block?

Warm in winter and cool in summer

CEB is a good thermal insulator, which can store heat in cold winters to ensure that the temperature of the room will not quickly lose.

In the hot summer, it can also be kept cool well and will not let the heat from outside the room come in.

Low construction cost

The raw material soil can be taken locally. There is a lot of soil around you, only a small amount of cement is needed, and the cost is greatly reduced compared with concrete bricks. And it also reduces the transportation cost of raw materials.

Pollution-free, healthy

Earth is the oldest building material. People first used soil to build houses.

The raw materials are all natural and will not release preservatives and poisonous gases.

Environmental protection, sustainability

The production process of compressed soil bricks does not need to consume a lot of heat, because the bricks you produce do not need to be fired, and you can directly dry and cure them naturally.

When the house needs to be rebuilt in the future, these building materials can still be recycled.

How to produce compressed earth blocks?

The compressed earth block machine produced by Lontto is specially used to produce CEB. According to the difference of automation, it can be divided into manual earth block machine, semi-automatic CEB machine, and fully automatic CEB machine.

First, mix the soil in a certain proportion, 95% soil, 5% cement or lime, add an appropriate amount of water, mix in a mixer, and then transport the raw materials to the brick machine through a belt conveyor, which is hydraulically driven to press and form.

The ceb machine can produce a variety of different sizes of bricks, just need to change different molds.

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