How Sand-to-Cement Ratios Affect the Strength and Durability of Blocks
In The Gambia, it’s common to hear about “cheap blocks” on the market. What makes them cheap is usually the sand-to-cement ratio. While block makers reduce cement to cut costs, this shortcut produces weak and porous blocks that don’t stand the test of time.
The Problem with Bad Ratios
- Too Much Sand: Sand is cheaper than cement, but it dilutes the mix. Too much sand means blocks don’t bind properly.
- Too Little Cement: Cement is the glue that holds the block together. Without enough of it, blocks crumble under pressure.
- Inconsistent Mixing: Many block yards mix by eye, not by standard, leading to wildly different block strengths.
The Consequences
- Blocks that break or chip easily.
- Buildings vulnerable to cracks and collapse.
- Higher water absorption, leading to damp and mould.
- Long-term structural risks for homeowners.
The Better Alternative: Eco Interlocking Earth Blocks
CIEBs use laterite soil mixed with just 5–10% cement, carefully balanced for strength and stability. Because they are compressed under high pressure, they achieve higher density and durability with less cement — a more efficient and eco-friendly solution.
Practical Tip
If buying cement blocks, test them by dropping one from waist height. If it crumbles, the sand-to-cement ratio was likely too low. For peace of mind, Eco Bricks’ CIEBs guarantee consistent strength in every block.
Cutting corners with sand-to-cement ratios may lower the upfront cost, but it creates weak blocks and long-term expenses. Eco Interlocking Earth Blocks strike the perfect balance of strength, durability, and sustainability.
Build for the future with Eco Bricks
strong, sustainable, and designed for The Gambia’s climate.