1. DEEPAYAN MAZUMDER
PROFESSIONAL PRACTICE
REPORT 2016
Student Number- 42972442
Division –School of Civil Engineering
Expected Date of Graduation- Dec 2016
Period of Employment- 28/11/2015-09/02/2016
Number of day’s worked-60
FEBRUARY 25, 2016
SHANTA PROPERTIES LTD
186, Bir Uttam Mir Shawkat Sharak Tejgaon,Dhaka-1208

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1.0 INTRODUCTION
Company- Shanta Properties:
Shanta has a long track record of construction since 1991, having been involved in various
projects of its own. It has built the iconic Safura Tower-the 16 storied commercial landmark at
Banani, the 20,000 sqft multi-facility centrally air conditioned International School Dhaka (ISD)
at Bashundhara. The company was also involved in the construction of Apollo Hospital Dhaka-
the 550,000 first multidisciplinary super specialty hospital of the country.
Site- Araddho at Dhanmondi 13A
This project was commenced on 1st Jan of 2012 and it is due to finish by 29th Dec of 2016.The
total budget of this project is 220 million BDT. The total land area of this project is around
72,000 sqft(6689.0 m^2) and the total floor area of this building is around 55,000 sqft
(5109.7m^2).. Araddho is a 10 storied building, where the total number of apartments are 14
with 2 basements. This building is located on the southern side and for decoration this building
has 2 water bodies and 4 gardens (roof+ground).
For earthwork, earth cutting has taken place 20ft (6.096m) below the ground level. For drainage,
submersible pump had been used for pumping water during earth cutting. Araddho is a frame
structure building where total number of 28 columns have been used, and the maximum size of
the column is 20”*20”.For this project, tied column were used. Few shear walls were also
provided that will resist lateral loads. The strength of the column was approximately 4000 psi
and the reinforcement of this column is 60,000 psi.

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2.0 SCOPEOF EMPLOYMENT
When I did site inspection of the project along with site engineers, there are some valuable lessons
I have learned:
 Formwork.
 Casting of floor slab.
 Curing.
2.1 LESSON LEARNED
2.1.1. Formwork:
In this project steel formwork has been used. This consists of panels fabricated out of thin steel
plates stiffened along the edges by small steel angles. The panel units can be held together by two
or more clamps or bolts provided along each edge and the shuttering can be assembled and kept in
alignment by use of horizontal or vertical centering of timber or steel. The usual size for wall or
slab panel varies from 60cm*60cm to 60cm *120cm.
Steel forms are mostly used in large construction projects or in situation where large number of
re-uses of the same shuttering are possible. Steel forms are extensively used in repetitive castings
of pre-cast concrete product. Steel shuttering is also considered really suitable for circular or
curved shaped structures such as tanks, columns and retaining walls.

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Some of the advantages of using steel formwork over other formworks:
 Steel forms are stronger, more durable and have longer life span.
 They can be put to sufficiently large number of re-uses. For estimation purposes the number
of re-uses can be assumed to vary from 100 to 120.
 Steel forms can be installed and dismantled with greater ease and speed which results in
saving in labor cost for this item of work.
 The quality of exposed concrete surface obtained by use of steel forms is excellent and it
needs no further treatment.
 There is no danger of the formwork absorbing water from the concrete.
 Steel formwork are not liable to shrink or distort and hence it is possible to achieve better
workmanship and higher degree of accuracy by use of steel forms.
Method of Removing Formwork:
The formwork should be planned and constructed in such a manner that it is possible to remove
the different components in the following order of sequences.
 Shuttering forming vertical faces of walls, beams and columns sides should be removed
first.
 Shuttering forming slab should be removed then.
 Shuttering forming girders, beams or other heavily loaded shuttering should be removed in
the end.
Duration of time up to which the formwork should be kept in place depends upon many factors
such as type of cement used, shape and position of the member. In general, rapid hardening cement,
warm weather and light loading conditions allow early removal or formwork. The formwork

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should under no circumstances be removed until the concrete reaches a strength of at least twice
the stress to which the concrete may be subjected to at the time of removal of formwork.
2.1.2 CASTING ON FLOOR SLAB
A slab is a large, flat piece of stone or concrete and typically rectangular in size. In Bangladesh,
for most construction purpose we use concrete floor slab. It is most common structural element of
modern domestic buildings, which is a horizontal slab of steel reinforced concrete. Standard
concrete floor thickness in residential construction is 4 inches. Five to six inches is recommended
if the concrete receive occasional heavy loads.
CONSTRUCTION PROCEDURE
 In the beginning of the construction procedure, shuttering was done by using both bamboo
and props. It is then leveled by a thin water pipe.
 Then plane sheet of tin plate is placed on the leveled surface. Then damp proof members
are laid after the leveled surface. Formwork for the slab is also constructed at the edge.
 According to the design of the slab, beam is constructed.
 Two layers of reinforcement is provided. At first bottom layer rod is placed and then top
layer of rod is placed. Then extra top is placed between two layers. We have to maintain
clear cover at least 1’’ to 1.5’’ (2.54 cm to 3.81cm) between the base and reinforcement by
a cement block.
 After settling the reinforcement, electrical wires are placed in between two layers according
to the design.
 The concrete is then mixed and poured on top. Mixing is done by one part cement, two
parts sand and four parts ballast (1:2:4=cement: sand: ballast).

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 A vibrator machine is used to set the mixture of cement, sand and ballast poured in the
slab.
 Place a curing compound (water) over the surface. Leave the curing compound place until
the concrete achieves strength of at least 5000 psi. They usually occurs within few days( at
least 21 to 28 days)

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LIMITATIONS:
 The dimensions of the slab should be at least 3m x 2m and the longer dimension should be
less than 1.5 times the shorter dimension. Internal stiffening beams, similar to the internal
edge beam may be required.
 Most new concrete floors are laid well, but even the best builders tend to forget to seal the
floor to wall joint properly. The small gap between wall face and the plastic sheet that rises
up the wall from under the new concrete is a high pressure area for water vapor. If this gap
is not prepared and sealed properly damp is drawn up the wall and, even if a damp proof
course has been correctly fitted, the vapor alone can cause rot in the skirting boards and
‘salting’ in the plaster above.
 Proper curing conditions are critical and the curing methods must be put in place as soon
as the finished surface can resist damage.
 Cracks a symptom of rapid drying when laid or subsidence. The concrete must not be
allowed to freeze or dry out. Place a curing compound over the surface, or provide
appropriate moist curing. If there is a risk of freezing, cover the slab with an insulator, such
as insulating blankets or a 4-inch-thick layer of straw that is weighted down to prevent it
from blowing away.
 Concrete can't be installed everywhere. Before considering a concrete floor, consult an
experienced concrete contractor who has installed similar floors. In some cases, the

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engineering needed to create the correct solution can be more expensive than many other
materials. That said, the limitations on where you can install concrete are not as restrictive
as you would think. With proper preparation to the subsurface and structural support, it can
even be installed in upstairs bedrooms.
 Concrete is expensive, especially in any installation that requires substantial floor
preparation.
 Framework with panel is expensive.
2.1.3 Curing:
Curing is the process in which the concrete is protected from loss of moisture and kept within a
reasonable temperature range. This process results in concrete with increased strength and
decreased permeability. Curing is also a key player in mitigating cracks, which can severely affect
durability. When cement is mixed with water, a chemical reaction called hydration takes place.
The extent to which this reaction is completed influences the strength and durability of the
concrete. Freshly mixed concrete normally contains more water than is required for hydration of
the cement; however, excessive loss of water by evaporation can delay or prevent adequate
hydration. Curing methods that have been used throughout this project are:
 Ponding and Immersion-On flat surfaces, such as pavements and floors, concrete can be
cured by ponding. Ponding is an ideal method for preventing loss of moisture from the
concrete; it is also effective for maintaining a uniform temperature in the concrete. The
curing water should not be more than about 11°C (20°F) cooler than the concrete to prevent
thermal stresses that could result in cracking. The most thorough method of curing with
water consists of total immersion of the finished concrete element.
 Fogging- A fine fog mist is frequently applied through a system of nozzles or sprayers to
raise the relative humidity of the air over flatwork, thus slowing evaporation from the
surface. Fogging is applied to minimize plastic shrinkage cracking until finishing
operations are complete. Once the concrete has set sufficiently to prevent water erosion,
ordinary lawn sprinklers are effective if good coverage is provided and water runoff is of
no concern.
 Plastic Sheets- Plastic sheet materials, such as polyethylene film, can be used to cure
concrete Polyethylene film is a lightweight, effective moisture retarder and is easily applied
to complex as well as simple shapes. Curing with polyethylene film can cause patchy
discoloration, especially if the concrete contains calcium chloride and has been finished by
hard steel troweling. This discoloration is more pronounced when the film becomes
wrinkled, but it is difficult and time consuming on a large project to place sheet materials
without wrinkles. Polyethylene film may also be placed over wet burlap or other wet
covering materials to retain the water in the wet covering material. This procedure
eliminates the labor-intensive need for continuous watering of wet covering materials.

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3.0 EVALUATION OF EMPLOYMENT
Name Deepayan Mazumder ___________ Date of Review
08/02/2016
Job Title Internship Department___Project
Operation_______________________
Date Appointed to this Position___28/11/2015 Review Period_ 60 days_______________
Manager’s Name and Title__
_Engr. Md. Amimul Ehsan, Assistant Project Manager, Shanta Holdings Limited,
Bangladesh.___________________________________________________________
SECTION I—MAJOR AREAS OF RESPONSIBILITY
Performance Ratings:
Meets Expectations - Consistently meets and occasionally exceeds expectations.
Primary Performance
Expectations:
Responsibilities/Goals
Notes/Comments on Achievements &
Areas for Improvement
Outstanding
Above
Expectations
Meets
Expectations
Below
Expectations

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Needs
Improvement
To Maintain Work schedule
He followed the schedule and tried his best
for achieving goals.
Meets
Expectations
Taking actions when needed. He informed when decision needed from
managerial body and when needs support
from other workers.
Meets
Expectations
Drawing study and trying to
understand WBS.
He tried to follow the ongoing works and
studied the work methods and analyzed the
drawing.
Meets
Expectations
SectionII—Performance Competencies(Skills and behaviors)
Competency Area
Notes/Comments on Competency Areas
and Suggestions for Improvement
Outstanding
Above
Expectations
Meets
Expectations
Below
Expectations

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Needs
Improvement
Taking Responsibility:
Completes assignments in a
thorough, accurate, and timely
manner that achieves expected
outcomes; exhibits concern for
the goals and needs of the
department and others that
depend on services or work
products; handles multiple
responsibilities in an effective
manner; uses work time
productively.
He is capable of taking responsibility and
will improve more if he tries.
Meets
Expectations
Problem Solving/Creativity:
Identifies and analyzes
problems; formulates alternative
solutions; takes or recommends
appropriate actions; follows up
to ensure problems are resolved.
More concentration will make him capable
of solving construction related problems
easily.
Meets
Expectations
Collaboration/Teamwork:
Uses diplomacy and tact to
maintain harmonious and
effective work relationships with
co-workers and constituents;
adapts to changing priorities and
demands; shares information
and resources with others to
promote positive and
collaborative work relationships;
supports diversity initiatives by
demonstrating respect for all
individuals.
He is a good team worker and humble to all
other workers.
Meets
Expectations

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Communication/Interpersonal
Skills: Is able to effectively
communicate and to influence
others in order to meet
organizational goals; shares
information openly; relates well
to all kinds of people; is able to
speak well and write effectively.
Communication skill is very good. Above
Expectations
Section III—OVERALL ASSESSMENT
Summary Comments: He is an honest and hardworking person. I
wish his successful career.
Overall Rating:
___ Meets
Expectations
Staff Signature Deepayan Mazumder Date
08/2/2016
I have read this appraisal and it has been discussed with me. I understand that signing this
appraisal does not necessarily mean that I agree with all of the information in it.
Manager’s Signature ______ Date
8/2/2016

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4.0 CONCLUSION
Working with professional engineers for 60 days really enhanced my knowledge on curing, casting
on floor slab and formwork. I came to realize why steel formwork is more preferable than plywood
or timber formwork and how it should be removed, how casting on floor is done and what are the
challenges we face while casting and also the importance of curing and what methods can be used
to optimize the result. The knowledge that I have achieved during my internship will surely help
me in the future when I will work in a much bigger project.