Quality

civil techniques

Testing for Burnt Clay Bricks

abbu riyaz 1 May, 2023

Testing for Burnt Clay Bricks discus in this post. Brick has certain physical and chemical properties. Bricks use in latest constructions. It make renovations right across the world. Brick is a soundproof, fire resisting material. As it posses these characteristics it uses to construct partition walls in Industries. And use for home extensions, walls of different thickness. It is cheap, hard, durable and easy to handle and to work with. These properties make brick a leading building material.

Testing for Burnt Clay Bricks

There are some important Testing for Burnt Clay Bricks. The testing’s carryout in bricks are as follows,

Compressive Strength
Water Observation
Physical Dimension and
Efflorescence

1.Compressive Strength

The brick tests for checking its load bearing capacity. This test carries with Compression testing machine. The compressive strength determines by a formula,

compressive strength = Max load at failure / Area of brick at Rectangular face

2.Water Observation

This test conducts on bricks to find its water observing percentage. Bricks lays in courses and numerous patterns known as bonds. It constructs with various kinds of mortar to hold the bricks together. And to make a durable structure. The bond in between the bricks gets week when brick consumes water from mortar. For these reason water observing percentage must be less for brick. These water observing must not be more than twenty percent of its weight. It calculates using the formula,

M = ( M2 – M1 ) / ( M1 ) X 100

Where,

M1 – Weight of dry brick

M2 – Weight of Soaked brick

3.Physical Dimension

Bricks have different sizes & Dimensions. It possess plain rectangular faces with sharp edges or corners. And it has uniform colour on all faces. There are two major types of bricks,

Modular Bricks and
Non-Modular Bricks

The main requirement of brick is that it has to free from, cracks, flaws. And free from foreign materials present inside it.

Standard Modular Bricks

The standard Modular Bricks has different dimensions compares to Non-Modular Bricks. The size of standard Modular Bricks are 190 mm length,110 mm width and 90, 40 mm height.

Standard Non-Modular Bricks

The standard Non – Modular Bricks has different dimensions compare to Modular Bricks. The size of standard Non-Modular Bricks are 230 mm length, 110 mm width and 70,30 mm height.

For making a uniform bond in-between bricks, Standard Modular Bricks and Non-Modular Bricks combines.

4. Efflorescence

It is test performs to find the presence of foreign Particles and other chemicals present in it. In this test, the brick soaks in water for one day and dry in shade. If the presence of grey or white deposits spots it indicates the presence of chemicals.

civil techniques

Requirement of Burnt Clay Bricks

abbu riyaz 1 May, 2023

Requirement of Burnt Clay Bricks discuss in this post. Bricks have different sizes & Dimensions. It possess plain rectangular faces with sharp edges or corners. And it has uniform colour on all faces.

Brick has certain physical and chemical properties. Bricks use in latest constructions. It make renovations right across the world. Brick is a soundproof, fire resisting material. As it posses these characteristics it uses to construct partition walls in Industries. And use for home extensions, walls of different thickness. It is cheap, hard, durable and easy to handle and to work with. These properties make brick a leading building material.

The main requirement of brick is that it has to free from, cracks, flaws. And free from foreign materials present inside it. The Physical dimension of brick is consider as major aspect.

Bricks possess standard dimension. There are two major types of bricks,

Modular Bricks and
Non-Modular Bricks

Standard Modular Bricks

The standard Modular Bricks has different dimensions compares to Non-Modular Bricks. The size of standard Modular Bricks are 190 mm length,110 mm width and 90, 40 mm height.

Standard Non-Modular Bricks

The standard Non – Modular Bricks has different dimensions compare to Modular Bricks. The size of standard Non-Modular Bricks are 230 mm length, 110 mm width and 70,30 mm height.

For making a uniform bond in-between bricks, Standard Modular Bricks and Non-Modular Bricks combines.

Requirement of Burnt Clay Bricks

Bricks Tests for its physical dimension. It is consider as major aspect in testing of bricks. Twenty bricks arranges in a flat level ground surface in a straight line in contact with face of bricks.

These arranged bricks measures with measuring instruments. Length, width and height of bricks measures for its physical dimension requirements. It differs for standard Modular Bricks and Non-Modular Bricks.

The length of twenty bricks is 3.8 m and 1.8 m width, 1.8 m height For standard Modular Bricks

The length of twenty bricks is 4.6 m ,2.1 m width and 1.4 m height for standard Non-Modular Bricks

civil techniques

Procedure of Soil Compaction using Core Cutter

abbu riyaz 1 May, 2023

Procedure of Soil Compaction using Core Cutter 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.

Soil Compaction using Core Cutter Method

Core Cutter Method is use to find some important properties of soil. Some of the main properties of soil which are necessary to examine the compaction factors are as follows,

Bulk density
Dry density
Moisture Content / Water Content

Equipment for Core Cutter Method

Cylindrical core cutter
Steel ramer
Steel dolly
Weighing balance
Palette knife
steel rule.

Procedure of Soil Compaction using Core Cutter

1. Level the top soil surface area properly.

2. Compact the earth layer by means of mechanical compactors.

3. Note down the weight of core-cutter.

4. Calculate the Volume of core-cutter.

5. Place the core cutter on the top surface of soil layer.

6. Keep the steel dolly on top of the core cutter.

7. Drive the core cutter vertically into the soil layer with the help of a steel rammer.

8. Make sure only about 15 mm of the dolly seen above the surface of soil layer.

9. Dug the sides of core cutter carefully without disturbing the cylindrical core cutter.

10. Take out the core cutter with soil present inside it.

11. Trim the bottom of core cutter with a straightedge carefully.

12. Remove the soil core from the core cutter.

13. Note down the weight of soil core taken from core cutter.

14. Save samples in a airtight container for calculations and observations.

The Field Dry Density (FDD), Bulk Density and compaction percentages derives from the soil core sample taken by core cutter. The moisture content of the soil sample is derives from Rapid Moisture Meter. With all this parameters the calculations computes. And the compaction percentage of earth layer determines.

civil techniques

STEPS FOR DPT TEST IN PEB MEMBERS

abbu riyaz 1 May, 2023

The STEPS FOR DPT TEST IN PEB MEMBERS are discuss in this post. The Pre Engineered Building (PEB) System is growing rapidly in almost all parts of the world. These are the steel buildings in which excess steel avoids. This complete building system is Pre Engineered. And to make the easy production. And easy assembly on the site.

The use of PEB is highly economical and Eco friendly. By the application of this we can save the natural resources. It has numerous advantages.

It reduces the Construction cost and time of Mass buildings and Heavy structures.

The Welding is the major connection of members. The welding makes to connect the member strongly. It should be free from all the Defects.

Dye Penetration Testing (DPT) is a test uses to identify the discontinuities in welding joints in PEB members. And uses to detect the cracks, fractures, pinholes, porosity, potholes, in the PEB members.

Dye Penetration Testing has many names like,

The Liquid Penetrate Inspection
The Penetration Testing

It is a simple test. And a easy test to identify the discontinuities in welding joints. And to detect the cracks, fractures, pinholes, porosity, potholes, in the PEB members. Using this method all the surface defects and the flaws are easily identify and rectify. This test carries out without difficulties. This is one of the oldest test for identification of the cracks, fractures, pinholes, porosity, potholes, in PEB members.

STEPS FOR DPT TEST IN PEB MEMBERS

The STEPS FOR DPT TEST IN PEB MEMBERS are as follows,

1. Pre Cleaning

The Surface to examine (PEB Member) cleans fully. All the adjacent sides of welding joints cleans properly up to minimum of twenty centimeter. The joints coats with primer and paint removes with wire brush for testing and to obtain accurate results.

It must be free from dirt, dust, paint, oil, grease, rust, and other foreign materials.

2. Drying After Cleaning

After cleaning, the member allows to dry. This makes to form a dry and clean surface for testing. This takes three to five minutes depending on the condition of site. And size of the material to test. This cleaning makes, if any residue of liquid presents on the member, it blocks the passing of the penetrant. This drying process carries with the help of hot air driers, air blowers, etc.

3. Penetrant Application

Now, the penetrant applies to the dry surface of the PEB Member. This carries with brush or spray. For better, accurate and quick results spraying carries out.

It sprays exactly on the surface of members in which the defects to identify. And sprays exactly on the welding connections for examining of flaws.

4. Removal of Excess Penetrant

After sufficient penetration, the excess penetrant all around the surface of material wipes off.

And cleans in all the welding joints. This cleaning carries out with dry and clean wipers.

5. Drying

After removal of excess penetrant it allows to dry in normal tempreture. No other drying methods like, drying with hot air driers, air blowers, etc requires.

This penetrant allows to remain on the member for five to ten minutes depending on the size of materials, length of welding joints.

This makes to get the penetrant sink into the cracks,pores,holes,etc. This depends on the size of the PEB members to test. And the length of welding joints.

6. Developer Application

The Developer is white in color. The developer applies quickly on to the surface of area. And welding joints to examine on the member. This carries out with spraying. The complete area of penetrant covers with spraying the white Developer. This application of developer carries out within one to two minutes after drying of penetrant.

7. Evaluation

Evaluate after a minimum time period of ten minutes. This evaluation carries out in a dark environment. It is clearly visible on to the surface of PEB Members. Now the discontinuities in welding joints identifies. And the cracks, fractures, pinholes, porosity, potholes, in the PEB members evaluates.

These are the main STEPS FOR DPT TEST IN PEB MEMBERS follows for testing of materials.

civil techniques

RECTIFICATION OF FLAWS IN PEB USING DPT TEST

abbu riyaz 1 May, 2023

The RECTIFICATION OF FLAWS IN PEB USING DPT TEST are discuss in this post. The use of PEB is highly economical and Eco friendly. By the application of this we can save the natural resources. It has numerous advantages.

The joining and fixing of I-shape members makes as I-beams and columns. These forms by welding the steel plates together. And connects through bolts. And forms an entire frame of the Pre-engineered building. It reduces the Construction cost and time of Mass buildings. And the Heavy structures. The Welding is the major connection of all the members. This welding makes to connect the member strongly. It should be free from all the Defects.

To confirm the proper welding connections in the members to form a strong Connection many tests performs like, DPT,etc.

The Dye Penetration Testing (DPT) is a test uses to identify the discontinuities in welding joints in PEB members.

Dye Penetration Testing has many names like,

The Liquid Penetrate Inspection
The Penetration Testing

It is a simple test. And a easy test to identify the discontinuities in welding joints. Using this method all the surface defects and the flaws are easily identify and rectify. This test carries out without difficulties. This is one of the oldest test for identification of the defects in PEB members.

RECTIFICATION OF FLAWS IN PEB USING DPT TEST

The rectification methods for improper welding are as follows.

The imperfections fix by welding, chipping and grinding.
The minor imperfections grinds and finishes.
Only major imperfections welds and repairs.
The affected areas chips(Excavates) up to a minimum depth.
Removing all sharp notches, hollow gaps, holes,etc,.
The affected and repaired areas welds again properly.
And after welding it grinds to obtain a complete and proper connections without sharp notches, holes etc,.

These are some of the methods and process for fixing of imperfections in the welding joints.

civil techniques

MATERIALS FOR DPT TESTING IN PEB

abbu riyaz 1 May, 2023

The MATERIALS FOR DPT TESTING IN PEB is discuss in this post. Dye Penetration Testing (DPT) is a test uses to identify the discontinuities in welding joints in PEB members. And uses to detect the cracks, fractures, pinholes, porosity, potholes, in PEB members.

The Dye Penetration Testing has many names like,

The Liquid Penetrate Inspection
The Penetration Testing

MATERIALS FOR DPT TESTING IN PEB

The MATERIALS FOR DPT TESTING IN PEB are as follows,

Cleaner
Penetrant
Developer

The Cleaner, Penetrant and Developer are the three main materials for this DPT testing. These are all Non toxic chemicals. And Eco friendly materials. Using these Cleaner, Penetrant and Developer DPT testing carries out.

1. Cleaner

The Cleaner is uses to clean the surface and connections of member. The specimen to test (PEB Member) cleans for applying of the Penetrant in welding joints. It must be free from dirt, dust, paint, oil, grease and other foreign materials. For this cleaning a organic chemical like acetone uses. It is a colorless and Non toxic chemical. And a portable material comes in spray cans and in tins.

2. Penetrant

The Penetrant is on of the main element in DPT testing. Penetrant is a Dye. Its a coloring agent. It is of a high contrast color. Penetrants are red in color. So that the indications seen clearly above the white developer.

It is a water washable type. And easily cleans after testing on the materials. Penetrant sprays on the welding joints and other connections of PEB members.

It allows to remains for three to five minutes on the member. This makes to get the penetrant sink into the cracks,pores,etc. This depends on the size of the PEB members to test.

3. Developer

The excess penetrant removes from the welding joints and other connections of PEB members. And Developer applies on the welding joints and other connections of PEB members.