Search This Blog
Archive for December 2014
[Pdf] [Ebook] RRB (Railway Recruitment Board) Civil Engineering SSE EXAM Model Paper
INCOMING SEARCHES
rrb sse
rrb sse books
rrb sse exam pattern
rrb sse exam books
rrb je sse
rrb sse 2014
rrb sse book
rrb sse je
rrb je and sse
rrb sse study material
rrb sse apply online
rrb sse and je
rrb sse online application
sse rrb
sse in rrb
rrb sse syllabus
rrb sse exam syllabus
syllabus for rrb sse exam
rrb sse syllabus 2014
railway sse exam syllabus
rrb je sse syllabus
sse syllabus
sse railway syllabus
railway sse syllabus
syllabus for sse in railway
rrb sse previous papers
rrb sse exam papers
rrb sse previous year paper
rrb sse paper
rrb sse papers
rrb sse previous question papers
sse exam
rrb sse recruitment 2014
rrb sse recruitment
railway sse exam
sse railway exam
sse exam 2014
sse recruitment 2014
sse railway recruitment 2014
railway sse recruitment 2014
sse recruitment
sse in railway
sse recruitment in railway
railway sse recruitment
rrb exam syllabus
syllabus for rrb exam
rrb exams syllabus
syllabus of rrb exam
rrb secunderabad exam syllabus
rrb exam pattern and syllabus
rrb exam syllabus and pattern
rrb written exam syllabus
rrb recruitment 2014
rrb 2014 recruitment
rrb engineer recruitment 2014
rrb recruitment in 2014
rrb jr engineer recruitment 2014
www.rrb recruitment 2014
rrb recruitment exam
rrb engineer recruitment
rrb recruitment for engineers 2014
rrb recruitment for engineers
rrb recruitment exam 2014
rrb recruitment board
recruitment of rrb 2014
rrb engineers recruitment 2014
all rrb recruitment 2014
rrb exam books
rrb books
books for rrb exam
rrb exam reference books
books for rrb exam 2014
books for rrb
rrb exam questions
rrb exam question
rrb question
rrb questions
rrb question pattern
rrb exam question pattern
rrb model question
rrb question pattern 2014
rrb model questions
rrb questions 2014
rrb se exam date
rrb se exam papers
rrb je se syllabus
rrb se je
rrb je and se syllabus
rrb je se recruitment 2014
rrb se je syllabus
rrb je se syllabus 2014
rrb je se previous papers
rrb section engineer
rrb senior section engineer
rrb section engineer recruitment 2014
rrb section engineer books
rrb exam pattern for section engineer
rrb senior section engineer syllabus
rrb section engineer syllabus
rrb syllabus for section engineer
rrb section engineer 2014
rrb senior section engineer books
rrb exam books for section engineer
rrb senior section engineers vacancies 2014
rrb senior section engineer 2014
rrb books for section engineer
rrb section engineer recruitment
Tuesday, December 16, 2014
Posted by Saurabh Gupta
[PDF] RRB EXAM JE/SSE 2014 QUESTION PAPER FOR CIVIL ENGINEERING
RRB EXAM JE/SSE 2014 QUESTION PAPER
INCOMING SEARCHES
rrb je exam syllabus
rrb je exam
rrb je syllabus
rrb je exam 2014
rrb je exam pattern
rrb je recruitment 2014
rrb je syllabus 2014
rrb je recruitment
rrb je exam syllabus 2014
je rrb
rrb je exam pattern 2014
rrb je 2014 syllabus
syllabus of rrb je
rrb for je
rrb syllabus for je
rrb exam syllabus
syllabus for rrb exam
rrb exams syllabus
syllabus of rrb exam
rrb secunderabad exam syllabus
rrb exam pattern and syllabus
rrb exam syllabus and pattern
rrb written exam syllabus
rrb junior engineer syllabus
rrb junior engineer books
rrb junior engineer 2014
junior engineer rrb
rrb syllabus for junior engineer
syllabus for rrb junior engineer
rrb recruitment junior engineer 2014
junior engineer rrb recruitment 2014
rrb recruitment 2014 junior engineer
rrb chennai junior engineer recruitment 2014
rrb recruitment for junior engineer 2014
rrb junior engineer it syllabus
rrb exam syllabus 2014
rrb exam 2014 syllabus
syllabus for rrb exam 2014
rrb 2014 exam syllabus
syllabus of rrb exam 2014
rrb secunderabad exam syllabus 2014
rrb exam pattern and syllabus 2014
rrb syllabus for 2014
rrb recruitment 2014
rrb 2014 recruitment
rrb engineer recruitment 2014
rrb recruitment in 2014
rrb jr engineer recruitment 2014
www.rrb recruitment 2014
rrb recruitment exam
rrb engineer recruitment
rrb recruitment for engineers 2014
rrb recruitment for engineers
rrb recruitment exam 2014
rrb recruitment board
recruitment of rrb 2014
rrb engineers recruitment 2014
all rrb recruitment 2014
rrb exam books
rrb books
books for rrb exam
rrb exam reference books
books for rrb exam 2014
books for rrb
rrb exam questions
rrb exam question
rrb question
rrb questions
rrb question pattern
rrb exam question pattern
rrb model question
rrb question pattern 2014
rrb model questions
rrb questions 2014
rrb se exam date
rrb se exam papers
rrb je se syllabus
rrb se je
rrb je and se syllabus
rrb je se recruitment 2014
rrb se je syllabus
rrb je se syllabus 2014
rrb je se previous papers
rrb exam paper
rrb je exam paper
rrb exam paper for junior engineer
rrb exam model paper
rrb secunderabad exam papers
rrb exam paper pattern
rrb exam paper 2014
rrb paper
rrb je paper
rrb je exam question paper
rrb railway exam question paper
rrb junior engineer question paper
rrb paper pattern
rrb senior section engineer previous year papers
rrb model question paper for junior engineer
FREE- DOWNLOAD LINK click here
INCOMING SEARCHES
rrb je exam syllabus
rrb je exam
rrb je syllabus
rrb je exam 2014
rrb je exam pattern
rrb je recruitment 2014
rrb je syllabus 2014
rrb je recruitment
rrb je exam syllabus 2014
je rrb
rrb je exam pattern 2014
rrb je 2014 syllabus
syllabus of rrb je
rrb for je
rrb syllabus for je
rrb exam syllabus
syllabus for rrb exam
rrb exams syllabus
syllabus of rrb exam
rrb secunderabad exam syllabus
rrb exam pattern and syllabus
rrb exam syllabus and pattern
rrb written exam syllabus
rrb junior engineer syllabus
rrb junior engineer books
rrb junior engineer 2014
junior engineer rrb
rrb syllabus for junior engineer
syllabus for rrb junior engineer
rrb recruitment junior engineer 2014
junior engineer rrb recruitment 2014
rrb recruitment 2014 junior engineer
rrb chennai junior engineer recruitment 2014
rrb recruitment for junior engineer 2014
rrb junior engineer it syllabus
rrb exam syllabus 2014
rrb exam 2014 syllabus
syllabus for rrb exam 2014
rrb 2014 exam syllabus
syllabus of rrb exam 2014
rrb secunderabad exam syllabus 2014
rrb exam pattern and syllabus 2014
rrb syllabus for 2014
rrb recruitment 2014
rrb 2014 recruitment
rrb engineer recruitment 2014
rrb recruitment in 2014
rrb jr engineer recruitment 2014
www.rrb recruitment 2014
rrb recruitment exam
rrb engineer recruitment
rrb recruitment for engineers 2014
rrb recruitment for engineers
rrb recruitment exam 2014
rrb recruitment board
recruitment of rrb 2014
rrb engineers recruitment 2014
all rrb recruitment 2014
rrb exam books
rrb books
books for rrb exam
rrb exam reference books
books for rrb exam 2014
books for rrb
rrb exam questions
rrb exam question
rrb question
rrb questions
rrb question pattern
rrb exam question pattern
rrb model question
rrb question pattern 2014
rrb model questions
rrb questions 2014
rrb se exam date
rrb se exam papers
rrb je se syllabus
rrb se je
rrb je and se syllabus
rrb je se recruitment 2014
rrb se je syllabus
rrb je se syllabus 2014
rrb je se previous papers
rrb exam paper
rrb je exam paper
rrb exam paper for junior engineer
rrb exam model paper
rrb secunderabad exam papers
rrb exam paper pattern
rrb exam paper 2014
rrb paper
rrb je paper
rrb je exam question paper
rrb railway exam question paper
rrb junior engineer question paper
rrb paper pattern
rrb senior section engineer previous year papers
rrb model question paper for junior engineer
[PPT] [PDF] [NOTES] NON DESTRUCTIVE TESTING ON CIVIL ENGINEERING
NON DESTRUCTIVE TESTING
Non destructive test in CIVIL ENGINEERING Construction from Saurabh Gupta
•After this seminar you will able to answer the
following
üNon- destructive
testing
üRebound hammer
testing
üUltrasonic pulse
velocity test
üCover test
methods including principle, advantages and point of action
1.Technique to
test new or old concrete structure with respect to its strength and durability
,without or partial damage to a small part of concrete.
2.It doesn’t
estimate ultimate or yield strength of concrete.
3.It is easy
mechanized method, and is very cost effective , many test can be performed at
the same cost of single destructive test.
4.No sample is
required to collect for the laboratory testing as compare to some methods
destructive testing
OUTPUT OF NDT
•ELASTIC MODULUS
•REINFORCEMENT LOCTAION
•QUALITY OF WORKMANSHIP
•CRACKS AND VOIDS
•SURFACE HARDNESS
•DENSITY
•STRENGTH
•SURFACE ABSORPTION
•LIFE PERIOD
Sno.
|
TEST
|
1
|
Rebound Hammer Test
|
2
|
Windsore Probe Testing
|
3
|
Ultrasonic Pulse
Velocity Test
|
4
|
Acoustic Emission
Method
|
5
|
Pulse
Echo Method
|
6
|
Initial
Surface Absorption Test
|
7
|
Radar
Technique
|
8
|
Infrared Thermography
|
9
|
Quantab Test
|
10
|
Carbonation test
|
11
|
Profometer / Rebar
locator
|
NDT methods
Commonly used
•REBOUND HAMMER TEST (IS 13311 II)
Determination of
strength and hardness of concrete.
•ULTRASONIC PULSE VELOCITY TEST (IS 13311
I)
To determine the
homogeneity, compatibility and cracks or
void if present .
•PROFOMETER / REBAR LOCATOR
Location of bar and
diameter of bar
•CARBONATION TEST
To estimate the
amount of carbon and corrosion estimation.
REBOUND HAMMER TEST
•To assess the likely compressive strength
of concrete with help of with suitable co-relations
between rebound index and
compressive strength.
•To assess the uniformity of concrete.
•To assess the quality of concrete in
relation to standard requirements.
•To assess the quality of one element of
concrete in relation to another
•This method can be used with greater confidence for
differentiating between the
questionable and acceptable part of a structure or
for relative comparison between two
different structure.
When the plunger of rebound hammer is
pressed against the surface of concrete, the spring
control mass rebounds and
the extent of such rebound depend upon the surface hardness
of concrete, the
rebound is thus related with compressive strength of concrete and the
graduated
scale is designated as rebound number
It Consists of spring controlled mass that slides on a plunger within a
tubular housing.
The impact energy
required for rebound hammer for different application is different .
Rebound hammer is
used to check –
1 Compressive
strength of concrete
2 Uniformity of
concrete
3 Quality of element
of concrete
Limitation –
1 Accuracy ± 25%
2 Only suitable for
closed textured conc.
3 Partially compacted
concrete has no relation with rebound index
4 Result affected by
angle of test, surface smoothness and mix proportion.
AVG REBOUND NO.
|
QUALITY OF CONCRETE
|
>40
|
Very
good hard layer
|
30-40
|
Good
layer
|
20-30
|
Fair
|
<20
|
Poor
concrete
|
0
|
Delaminated
|
Ultrasonic pulse
velocity test
•To assess the uniformity and homogeneity
of concrete.
•To assess the quality of concrete in
relation of standard requirement.
•Detection of presence of voids, cracks
& imperfection of concrete.
•Measurement of changes occurring with time
in the properties of concrete.
•To compare quality of two different
concrete element.
Pulse velocity tests
measure the transit time of an ultrasonic pulse between two transducers,
a
transmitter and a receiver. The velocity of the pulse can be determined from
the transit
time and the distance between the transmitter and the receiver.
The pulse velocity measurement set consists of a pulse
generator, a transmitter, a
receiver,an amplifier, a circuit that measures the
elapsed time, a time display unit, and
connecting cables. Note that the pulse
generator, receiver, amplifier, timing circuit, and time
display unit are all
incorporated in the velocity meter shown in the schematic diagram of the
pulse
velocity measurement set
There are three ways in which the transducers may be
arranged, as shown in Figure :
(a) direct transmission through opposite faces
(b) semi-direct transmission through adjacent faces
(c) indirect transmission at the same face.
Factor affecting test results
•Smoothness of contact surface under test
•Influence of path line of pulse velocity
•Temperature of concrete
•Moisture content of concrete
•Presence of reinforcement steel
Stress level in concrete
Profometer /
REBAR LOCATOR
•To determine
1.Diameter of
reinforcement
2.Location of
R/F
3.Cover
The instrument is
based upon measurement of change of an electromagnetic field caused
by steel
embedded in the concrete.
Adequate cover to reinforcement is required in any reinforced concrete
structure to prevent corrosion and to improve durability of structure. To
calculate actual strength of concrete structures, the number of reinforcing
bars, their condition of corrosion, cover to reinforcement, and grade of
concrete is required. In the case of old structures, when the detailed drawings
are not available, it becomes very difficult to compute the strength of the
structure which is required for the strengthening scheme of the structure.
Sometimes, the strength of concrete structures are to be checked to permit
higher load and in absence of reinforcement details it becomes very difficult
to take a decision.
To overcome all these problems, the
methods have been developed for investigation and
evaluation of concrete
structures. Profometer is a small versatile instrument for
detecting
location, size of reinforcement and concrete cover. This instrument
is also known as rebar
locator. This is a portable
and handy instrument which is normally used to locate the
reinforcement on LCD
display. This instrument is available with sufficient memory to store
measured
data. Integrated software is loaded in the equipment for carrying out and printing
statistical values.
The equipment is quite handy and weighing
less than two kgs. It works on normal batteries
and thus
does not require any electrical connection.
Advantages
This is a purely non-destructive test for
evaluation of concrete structures particularly old
structures. The methods is
very fast and gives quite accurate results if the reinforcement is
not heavily
congested. The equipment is very light and even one person can perform the
test
without any assistance.
Factor affecting test methods
•Cover measurement may be affected by
neighboring bars parallel to the bras
being
measured.
•Magnetic effects from the aggregate
and matrix of the concrete.
•Variation in the properties of steel.
•Cross sectional shape of bars.
•Roughness of surface .
Monday, December 8, 2014
Posted by Saurabh Gupta