How to Make Concrete without Cement: A Step by Step Guide

Introduction

Concrete is a widely used construction material, known for its durability and strength. Most commonly, cement is used as a binding material in concrete. However, cement production is unsustainable and contributes significantly to greenhouse gas emissions.

There are several eco-friendly alternatives to cement for making concrete. In this article, we will guide you on how to make concrete without cement.

Step by Step Guide

Step 1: Prepare the materials

You will need:

• Gravel or crushed stone
• Sand
• Water
• Binder material (choose one or a combination of the following):

• Geopolymer
• Rice husk ash
• Fly ash
• Slag cement
• Ceramic waste powder
• Lime
• Gypsum

Step 2: Mix the materials

Use a mixing machine or a wheelbarrow to mix the materials. The ideal ratio of materials is:

• 1 part gravel or crushed stone
• 2 parts sand
• 1 part binder material
• Water as needed

Step 3: Add water

Add water to the mixture gradually while mixing. The mixture should be wet enough to make a solid block, but not too watery.

Step 4: Pour the mixture into the mold

Pour the mixture into the desired mold or container, and level the top with a trowel. Use a vibrator to remove any air bubbles and to ensure that the mixture settles evenly. Let the mixture dry for at least 24-48 hours.

Step 5: Demold the concrete

Once the concrete has dried, remove it from the mold or container. If there are any rough edges or surfaces, use a sander to smooth them out.

Conclusion

Making concrete without cement is not only eco-friendly but also cost-effective. By using eco-friendly binder materials, you can significantly reduce the carbon footprint of your construction projects. The steps outlined in this article are simple and easy to follow, and will help you make concrete without cement.