Compressed Earth Blocks: A Step-by-Step Guide to Make Eco-Friendly Soil Bricks

If you’ve ever considered an eco-friendly construction method, compressed earth blocks (CEBs) should definitely be on your radar. The use of this ancient yet versatile building material, made from locally sourced soil, has gained renewed interest over the years for its low cost, sustainability, and energy efficiency.

In this step-by-step guide, we’ll thoroughly explain the process of producing compressed earth blocks. You’ll learn how this fascinating technique can significantly reduce your environmental footprint while providing durable, resilient structures that stand the test of time.

From sourcing materials to proper block-making techniques, this comprehensive guide aims to give you insights and confidence to embark on your next building project using the power of the earth itself. Get ready to discover a world of possibilities with compressed earth blocks!

Materials and Tools

Soil Selection

Choosing the right soil is crucial for producing strong and durable compressed earth blocks. Look for a soil with a balanced composition of clay, silt, and sand. Here are some guidelines for suitable soil types:

  • Clay content: 15-30%
  • Silt content: 10-25%
  • Sand content: 40-70%

To test the soil’s composition, try the “thread test.” Moisten a small amount of soil, and roll it into a thread. If it holds together well without breaking easily, the soil is a good candidate for compressed earth blocks.

soil for earth blocks

Required Tools

The essential tools for making compressed earth blocks are:

  1. Compressed Earth Block Press: This machine applies pressure to mold the soil into blocks. Manual and hydraulic presses are available.
  2. Shovels and Wheelbarrows: For collecting and transporting the soil.
  3. Screens and Sieves: To refine the soil by removing rocks, roots, and other debris.
  4. Measuring Tools: A ruler, a scale, and a moisture meter to ensure the consistency and proper size of the blocks.

With the right soil mixture and essential tools in hand, you can successfully create your own compressed earth blocks following the step-by-step guide!

Soil Preparation

Before we begin creating compressed earth blocks, it’s essential to prepare the soil. Proper soil preparation will ensure a strong and durable block.

Testing Soil Composition

To make high-quality blocks, we must first determine the soil composition. It’s essential to have the right balance of clay, silt, and sand. Here’s a simple test you can do at home:

  1. Fill a clear jar with 1/3 soil and 2/3 water.
  2. Shake the jar vigorously and let it settle for a few hours.
  3. Observe the layers of soil: sand at the bottom, silt in the middle, and clay at the top.

The ideal composition for compressed earth blocks is 10-30% clay, 30-50% silt, and 40-60% sand. If your soil differs from these proportions, you may need to mix in other materials to achieve the desired balance.

Moisture Content

Next, let’s check the moisture content of the soil. Proper moisture is critical for the strength of your earth blocks. Here’s a quick test to find out if your soil has the right moisture level:

  1. Tightly squeeze a handful of soil in your hand.
  2. Open your hand and observe the soil.

If the soil holds its shape, without being too wet or crumbly, the moisture content is suitable for making blocks. If it’s too wet, allow it to dry in the sun before using it. If it’s too dry, mix in small amounts of water until the correct consistency is achieved.

With proper soil composition and moisture content, we’re now ready to move on to the next step: mixing and molding the blocks.

Mixing and Stabilizing

Section 4 of our guide covers the crucial part of producing compressed earth blocks: mixing and stabilizing the soil. Proper mixing ensures that the blocks will have the optimal strength and durability.

Adding Stabilizers

First, let’s talk about adding stabilizers. Stabilizers are materials that help to make the earth blocks stronger and more resistant to weather conditions. Some common stabilizers include:

  • Cement
  • Lime
  • Bitumen

To add a stabilizer, measure the required quantity based on your soil type and block dimensions. Next, add the stabilizer to the soil gradually, making sure to mix it in thoroughly.

Mixing Techniques

Good mixing techniques help create uniform and strong blocks. Here are a few hints to make your mixing process better:

  1. Use the right mixing equipment, like a cement mixer, a manual drum mixer, or a shovel and a wheelbarrow.
  2. Wet the soil gradually – start with a small amount of water and add more as needed. The soil should be wet enough to create a moldable mix, but not too watery.
  3. Mix the soil and stabilizer well to make sure there are no air pockets or lumps of dry soil.

By using these simple techniques in this section, you will achieve well-mixed and stabilized soil ready for the next steps in producing compressed earth blocks.

Compression and Block Formation

Compressed Earth Blocks (CEBs) are created by compressing a combination of soil, clay, and water. In this section, we will discuss the two methods of compressing and forming blocks using manual and automatic presses.

Using a Manual Press

A manual press is a simple, hand-operated device that compresses the soil mixture into blocks. This is an affordable and accessible option for many people. To use a manual press, follow these steps:

  1. Prepare the soil mixture with the appropriate ratio of soil, clay, and water.
  2. Fill the press mold with the prepared mixture.
  3. Press the handle of the manual press to compact the mixture into a block.
  4. Release the newly-formed block from the mold and set it aside to dry.

Manual presses may require more labor than automatic presses but are more cost-effective and widely available.

Using an Automatic Press

An automatic press is a machine powered by a motor, making the compression process faster and more consistent. Here is how to use an automatic press:

  1. Load the soil mixture into the machine’s hopper.
  2. Activate the machine, which will compact and form the mixture into blocks automatically.
  3. Collect the finished blocks as they exit the machine and let them dry.

Automatic presses are more expensive than manual presses, but they save time and produce uniform blocks with consistent quality.

Curing and Storage CEB

Proper Drying Time

After making the compressed earth blocks, it’s essential to give them enough time to dry before using them. Typically, it takes about two weeks for the blocks to dry properly.

Factors that can affect drying time include:

  • Climate
  • Block size
  • Block composition

In areas with high humidity, the drying process may take longer. To ensure the blocks are ready for use, regularly check their progress by pressing on them. If they feel firm and dry, they’re good to go.


Storage Conditions

Proper storage is crucial to maintain the quality of the blocks. Choose a storage area that is:

  • Level
  • Protected from the elements
  • Free from excessive moisture

When stacking the blocks, leave enough space between layers to allow for proper air circulation. This helps prevent mold and mildew from forming.

By ensuring the proper drying and storage of your compressed earth blocks, you’ll have a strong and eco-friendly building material for your projects.

Using Compressed Earth Blocks in Construction

Compressed earth blocks (CEBs) are a sustainable and affordable material for constructing various structures. In this section, we’ll discuss the advantages and disadvantages of using CEBs in construction and some common building techniques.


Using compressed earth blocks in construction offers multiple advantages:

  • CEBs are eco-friendly and sustainable, as they do not require harmful chemicals or deforestation.
  • They are cost-effective, since they use locally available materials like soil and water.
  • CEBs have excellent thermal properties, which helps in maintaining indoor temperatures and reducing energy consumption.


Despite the numerous benefits, there are some potential drawbacks to using CEBs in construction:

  • CEBs may not be suitable for all climates, as they are more vulnerable to moisture damage compared to conventional building materials.
  • They may require additional labor for construction, as building with CEBs is a specialized skill.

Building Techniques

There are different methods to use CEBs in construction, such as:

  1. Stacked Block Technique: This involves stacking blocks directly on top of each other without mortar, also known as dry-stacking. Holes can be left for windows and doors.;
  2. Mortared Block Technique: This technique uses mortar between the blocks to create a more rigid and solid structure.

In both methods, it is essential to ensure that the blocks are well-aligned and level to maintain the structural integrity of the building. Once the walls are complete, a roof and finishing touches can be added to complete the structure.

LONTTO Compressed Earth Block Machine for CEBS

Have you ever heard of the LONTTO compressed earth block machine? LONTTO is a popular brand that manufactures high-quality compressed earth block (CEB) machines. In this section, we’ll discuss some features of their machines and how they can help you produce CEBs.

Why choose a LONTTO machine? LONTTO’s CEB machines are designed to be:

  • Easy to operate
  • Efficient, making blocks quickly
  • Durable, lasting for a long time

Now, let’s look at the process of using a LONTTO machine to make CEBs.

  1. Gather soil and mix it with water and a stabilizer like cement
  2. Load the soil mixture into the machine’s hopper
  3. Press the start button, and the machine will compress the soil into a block shape
  4. Remove the finished block and let it dry

How many blocks can a LONTTO machine make in a day? It depends on the specific model, but some machines can produce up to 5,000 blocks daily!

Where can you buy a LONTTO compressed earth block machine? You can find these machines online, and LONTTO has a variety of models to fit different needs and budgets.


In this step-by-step guide, we learned how to produce compressed earth blocks. These blocks are eco-friendly, affordable, and durable, making them a great choice for building materials.


  • Properly prepare the soil by testing it and identifying its composition.
  • Mix sand and clay for a strong and stable block.
  • Moisten and compress the mixture to form the block.
  • Cure the blocks to ensure maximum strength.

By following these steps, you can create high-quality compressed earth blocks for your next building project. With practice and patience, you’ll soon become an expert in producing these sustainable building materials.

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