After doing compaction test on fibre reinforced soil, how can we measure water content in the soil samples we take out each time. What are the various methods for this?
Nowadays, you can find interesting tools (computed tomography, tdr, neutron gauge) to evaluate soil water content direct in the field. These tools can be used to measure the water content several times at the same place without disturbe the soil structure. Traditional techniques such as the gravimetric method is other possibility. You can use both disturbed and undisturbed samples.
For laboratory experimentation, You should by what Said Amrani and Bakhtyar K. Aziz pointed out. Those are the simple laboratory procedure s and processes you can followed. But for field water content determination, you can use speedy moisture tester or tdr and neutron gauge for more accuracy.
The simple way is to measure conductivity/ resistivity of the soil sample. If moisture is present in the soil its conductivity will be more/ resistance will be less. For comparative measurements it is the simple way. It can be compared with that of the dry soil.
Otherwise dielectric measurements, gravimetric measurements and many other methods are there.