Did you know that there are 2 different ways to test your soil?
Before any block making starts, the soil used must be tested to determine its sustainability and the amount of stabilizer to be used.
The 2 basic field tests that must be carried out on every soil are:
- Bottle Test
- Box Test (Linear Shrinkage Test)
The Bottle Test
Ever had a hard time differentiating between silt and clay? You are not alone!
Through this test, you will be able to determine the amount of clay, silt, sand and gravel in the soil you are testing.
The Box Test (Linear Shrinking Test)
This test is used to determine the amount of cement or lime stabilizer to be used in a particular soil. To perform the test, you will need a box with internal dimensions of 600m*40mm*40mm.
- First oil the inside of the themould box.
- Some sieved soil is mixed with water until it cannot hold more. i.e it gets saturated
- The box is now filled with wet soil. The excess soil is removed by leveling the top. The box is then left in a protected area where the soil will be left to dry.
- After drying, the soil will have shrunk and probably cracked as well. It should now be pushed to the end of the box, leaving a gap on the other end. The gap left should be measured. This indicates the overall shrinkage of the soil.
To determine the cement soil ratio to be used, use a 15-litre bucket as a measuring/batching unit as follows:
|No. of Blocks Straight & Curved Interlocking Per Bag of Cement
|No. of Blocks wide interlock & standard blocks Per Bag of Cement
|Less than 12mm