Water Replacement Method PDF

Preview

Summary

The water displacement test method is utilized to determine the dry density of soil. It’s suitable for evaluating the in-place dry density of cohesive soil because of the nature of the specimen required....

Description

Water Replacement MethodThe water displacement test method is utilized to determine the dry density of soil. It’s suitable for evaluating the in-place dry density of cohesive soil because of the nature of the specimen required.

The soil sample ought to be trimmed to obtain a regular shape and then coated to make it impervious to water. After that, the total volume of this waxed specimen is found by determining the volume of water displaced from the specimen.

Apparatus of Water Replacement Method:  Water displacement apparatus  Weighing balance, accuracy 1g.

 Paraffin wax (density of paraffin (Pp)= 0.91 g/ml).  Cutting knife  Brush  Water content container  Heater  Oven  Measuring jar Also, read: What Is Slump Cone Test | Principle of Slump Test | Types of Concrete Slump

The procedure of Water Replacement Method of Field Density Test 1. Take the soil specimen. 2. Trim it to a regular shape. Avoid re-entrant corners. Weigh the specimen. 3. Take a paraffin wax and melt it onto a heater. Apply a coating of melted paraffin wax into the specimen with a brush. When it’s hardened, apply another coat. Take the mass of this waxed specimen (Mt). 4. Fill the water displacement apparatus with water. After the flow occurs, close the valve. 5. Place a measuring jar below the overflow tube of the apparatus. Open valve. 6. Immerse the waxed specimen slowly into the water from the apparatus. Water overflows. Collect the overflowed water from the jar. Determine the volume of the water collected (Vt). 7. Take out the waxed specimen from the apparatus. Dry it from outside. 8. Remove the paraffin wax by peeling off it. 9. Cut the specimen into two pieces. Take a representative sample to the water content determination.

Also, read: Heartwood Vs Sapwood | What Is Sapwood | What Is Heartwood

Calculations Sheet of Water Replacement Method: Observations and Sr.No.

Determination No. Calculations Sample-

Sample-

Sample-

1

2

3

Observation 1

Mass of specimen (M) Mass of waxed specimen

2 (Mt) The volume of a waxed 3

specimen by weight displacement (Vt) Calculations

4

Mass of wax = Mt – M Volume of wax (Vp) = (Mt

5 – M)/ Pp The volume of the 6 specimen (V) = Vt – Vp 7

Water content

8

Dry density =(M/V)/(1+w)...