Compaction

Moisture Content of Clay Soil By Rapid Moisture Meter consists of various procedures. Moisture Content By Rapid Moisture Meter is use to determine the Moisture content / water content in Clay soil sample. It is a mobile system for measuring large verities of materials like soil, aggregates,etc.

With this rapid moisture meter the Moisture content / water content determines quickly. It determines by the gas pressure of Calcium Carbide using in it. The Calcium Carbide reacts with water in the sample. And it forms Acetylene gas. This increase the pressure inside the vessel.

The Moisture content / water content percentage observes in the dial gauge. And calculations computes to determine the moisture content / water content in soil sample.

Moisture Content Of Clay Soil By Rapid Moisture Meter

Procedures for Determination of Moisture Content of Clay Soil By Rapid Moisture Meter

1. Preparations

The soil samples to determine the moisture content / water content is taken from soil collected with core cutter. No other special preparations requires for soil sample.

2. Quantity (Mass)

Take about six grams of Clay soil sample collects from the soil taken with core cutter. Take soil from the center portion of core cutter for accurate results. The mass of clay soil sample measures with a digital weighing scale or a counter balance present in rapid moisture meter kit.

3. Procedures

• Clean the hollow space of pressure vessel and sealing cup. And ensure it is empty and clean.

• Use the cleaning brush to remove residues from previous tests.
• Put three numbers of 12.5 mm diameter steel balls along with one full spoon of calcium carbide in sealing cup.
• And clay soil sample in the hollow space with 25 mm diameter steel ball in the pressure vessel.
• Seal the pressure vessel tightly with metallic sealing cup.
• Shake the Rapid Moisture Meter horizontally up and down continuously for five seconds.
• Again shake the Rapid Moisture Meter vertically forward and backward continuously for five seconds.
• After shaking horizontally & vertically hold the Rapid Moisture Meter for one minute.
• Note the dial gauge reading.
• Take three values and make an average reading.

4. Calculation

The Rapid Moisture Meter reading noted as ( M ). Using this Rapid Moisture Meter ( M ), the water content / moisture content ( W ) calculates.

The water content / moisture content W calculates using a formula,

W=[ m / (100-m)] / 100%

Where,

M = Rapid Moisture Meter reading from dial gauge.

Using this rapid moisture meter the moisture content / water content of clay soil sample computes.

Moisture Content of Wet And Dry Soil By Rapid Moisture Meter consists of various procedures. Moisture Content By Rapid Moisture Meter is use to determine the Moisture content / water content in Wet and Dry soil sample. It is a mobile system for measuring large verities of materials like soil, aggregates,etc.

With this rapid moisture meter the Moisture content / water content determines quickly. It determines by the gas pressure of Calcium Carbide using in it. The Calcium Carbide reacts with water in the sample. And it forms Acetylene gas. This increase the pressure inside the vessel.

The Moisture content / water content percentage observes in the dial gauge. And calculations computes to determine the moisture content / water content in soil sample.

Moisture Content of Wet And Dry Soil By Rapid Moisture Meter

Procedures for Determination of Moisture Content of wet and dry soil samples.

1. Preparations

The wet and dry soil samples to determine the moisture content / water content is taken from soil collected with core cutter. No other special preparations requires for soil sample.

2. Quantity (Mass)

Take about six grams of wet / dry soil sample collects from the soil taken with core cutter. Take soil from the center portion of core cutter for accurate results. The mass of soil sample measures with a digital weighing scale or a counter balance present in rapid moisture meter kit.

3. Procedures

• Clean the hollow space of pressure vessel and sealing cup. And ensure it is empty and clean.

• Use the cleaning brush to remove residues from previous tests.
• Put three numbers of 12.5 mm diameter steel balls along with one full spoon of calcium carbide in sealing cup.
• And wet / dry soil sample in the hollow space of pressure vessel.
• Seal the pressure vessel tightly with metallic sealing cup.
• Shake the Rapid Moisture Meter horizontally up and down continuously for five seconds.
• Again shake the Rapid Moisture Meter vertically forward and backward continuously for five seconds.
• After shaking horizontally & vertically hold the Rapid Moisture Meter for one minute.
• Note the dial gauge reading.

• Take three values and make an average reading.

4. Calculation

The Rapid Moisture Meter reading noted as ( M ). Using this Rapid Moisture Meter ( M ), the water content / moisture content ( W ) calculates.

The water content / moisture content W calculates using a formula,

W=[ m / (100-m)] / 100%

Where,

M = Rapid Moisture Meter reading from dial gauge.

Using this rapid moisture meter the moisture content / water content of wet and dry soil sample computes.

Moisture Content By Rapid Moisture Meter is use to determine the Moisture content / water content in soil sample. It is a mobile system for measuring large verities of materials like soil, aggregates,etc.

With this rapid moisture meter the Moisture content / water content determines quickly. It determines by the gas pressure of Calcium Carbide using in it. The Calcium Carbide reacts with water in the sample. And it forms Acetylene gas. This increase the pressure inside the vessel.

The Moisture content / water content percentage observes in the dial gauge. And calculations computes to determine the moisture content / water content in soil sample.

Moisture Content By Rapid Moisture Meter

The Rapid Moisture Meter consists of various tools in it. The main components of a Rapid Moisture Meter are given as follows,

1. A Pressure Vessel made of steel with a Dial gauge at top of it.
2. Metallic sealing cup
3. Digital weighing machine (or) Counter Balance
4. Steel balls of two different sizes
5. Calcium Carbide
6. Standard Scoop
7. Spoon
8. Cleaning Brush

1. Pressure Vessel

Rapid Moisture Meter consists of a pressure vessel made of metallic body. It is built with a metallic body to withstand the high pressure obtains inside it. And it consists of a dial gauge at one end of the pressure vessel. The moisture content / water content determines with the reading observes in the dial gauge.

2. Metallic sealing cup

The other end of the pressure vessel contains a hollow space. This space seals with a metallic sealing cup. This sealing cup is built up of metal to withstand the pressures obtains inside it. The entire reactions of the chemical and soil samples takes place inside the hollow space in pressure vessel.

3. Digital weighing machine (or) Counter Balance

The Rapid Moisture Meter consists of a digital weighing scale or a counter balance. This use to measure the mass of soil sample.

4. Steel balls

It consists of two different sizes of steel balls in it.

• 12.5 mm
• 25 mm

It has three 12.5 mm diameter Balls and one 25 mm diameter ball.

5. Calcium Carbide

The main element in the rapid moisture meter is Calcium Carbide. It acts as an Absorbent. It is mix with the soil sample along with steel balls inside the pressure vessel.

The Calcium Carbide reacts with water in the sample. And it forms Acetylene gas. This increase the pressure inside the vessel.

6. Standard Scoop

A Standard scoop use as a balancing tray to hold the soil samples in counter balance.

7. Spoon

A small Spoon use to take calcium carbide from container and to fill the hollow space of the pressure vessel.

8. Cleaning Brush

A Cleaning brush uses to clean the hollow space in the pressure vessel. It removes the dirt and remaining particles of calcium carbide and soil sample present inside the pressure vessel.

Calculation of  Soil Compaction using Core Cutter Method is discussed in this post. Soil Compaction using Core Cutter Method is use in construction field to determine the Field dry Density, Bulk Density and compaction of soil. It is use to identify the dry density of the compacted or dry fine grain soil which is free from the aggregates.

Calculation of Soil Compaction using Core Cutter Method

For Calculation of Soil Compaction using Core Cutter Method some important parameters has to be derived. That important parameters are as follows,

• Volume of Core Cutter
• Weight of Core Cutter
• Weight of Core Cutter + Weight of Soil
• Soil Weight
• Bulk Density
• Moisture content or Water Content
• dry Density and
• Maximum dry Density

1. Volume of Core Cutter (Vc)

The Volume of Core Cutter refers  to the volume of cylinder.

           Volume of Core Cutter = Volume of cylinder.

Vc =π r² x h

(or)

Vc = πd²/4 x h

2. Weight of Core Cutter (Wc)

Measure the weight of Core Cutter from a calibrated Weighing balance machine and note as Wc. And it is taken in grams.

3. Weight of Core Cutter + Weight of Soil (Ws)

The weight of Core Cutter + weight of soil measures from Weighing balance machine and noted as Ws. And it is taken in grams.

4. Soil Weight (Wa)

The weight of soil (Wa) derives from ( Ws – Wc )

(Wa) = ( Ws – Wc )

5. Bulk Density (Yb)

Bulk Density derives from the formula,

(Yb)=(Ws-Wc / Vc)

where,

Wc = weight of Core Cutter,

Ws = weight of Core Cutter + weight of soil

Vc = Volume of Core Cutter

6. Moisture Content / Water Content (W) %

The Moisture Content / Water Content of the wet soil determines from Rapid Moisture Meter. The moisture/water content of wet soil derives from the formula,

W= (M/100-M) x 100

The moisture/water content is taken in Percentage.

7. Dry Density (Yd)

(Yd)= (100 x Yb / 100 + w)

where,

Yb = Bulk Density,

W = Moisture Content / Water Content

8. Maximum Dry Density

The maximum value of Dry Density is taken and it is noted in grams.

9. Compaction Percentage

Compaction Percentage calculates by dividing the dry density by maximum dry density.

Cp % = Dry Density / Maximum Dry Density

Table for Calculation of Soil Compaction using Core Cutter

Method