AIM: To determine the free water in the cement slurry.
This experiment covers the determination of free water content in cement slurry using a 45-degree wooden stand.
SIGNIFICANCE: free water content in cement slurry is essential as it serves in determining the strength of the cement bond as well as the hydration behaviour of slurry.
In cementing any water in the slurry that is in excess of what is required to fully hydrate the Portland cement and additives is referred to as free water, free water usually separates as cement sets.
This separation tendency, occurs especially in the presence of high-pressure gas-bearing formation, for that reason the Well design usually specify maximum free water content for the slurry.
1. A 45-degree wooden stand
2. Measuring cylinder
4. Cement slurry
1. Transfer the slurry into the measuring cylinder with the aid of a spatula up until 250ml
2. The top of the cylinder was covered
3. The incline the cylinder at an angle of 45degree to the wooden stand
4. Then, leave the cylinder undisturbed for 2hours
5. Readings should then be taken
PRECAUTION: ensure that all equipment is cleaned properly after use.