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Question
Cube tests of concrete are failed at 7 days and 28 
days.What is your next action?
 Question Submitted By :: Civil-Engineering
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
NEXT ACTION IS NON DESTRUCTIVE TEST 
Is This Answer Correct ?    47 Yes 10 No
Imam
 
Answer
# 2
ensist contractor to hold skilled man power with quallity
material. note the result in daily work progress and mark
on structure which is not as per specification. finally go
for NDT if also structure fails then we have to demolish &
reconstruct the same
 
Is This Answer Correct ?    33 Yes 6 No
Abhijit
 
 
 
Answer
# 3
Any is code not give the clause regarding demolishing of
structure if cube fails in 28 days. but IS 456 & 516 give
the clause if strength of cube is less than FCK then
proceed for NDT Test i.e Rebound hammer if fail then go for
Ultrasonic test after all the NDT fail then proceed for
Core cutter also if U found result less then FCK then go
for Retrofitting with suggestion of consultant.
 
Is This Answer Correct ?    21 Yes 1 No
Vaibhav Jadhav
 
Answer
# 4
Go for NDTest, if it is not satisfied go for Core test that
is also failed go for concrete strengthing process As per
structural consultant comments
 
Is This Answer Correct ?    15 Yes 2 No
Nravindran
 
Answer
# 5
Well. When Concrete cube test result fails at 28th day then
go for concrete core cutting and check the compressive
strength in it. Number of cores shall be as per the
engineer incharge's decision but should not be less than 3
nos. IS:456 says if the core test fails then go for load
test. IS : 456 also says that NDT can be done . But with
rebound hammer test only surface hardness will be known and
hence this test result is not reliable and hardly anyone
suggests for this test.
 
Is This Answer Correct ?    13 Yes 2 No
Vimalsekar
 
Answer
# 6
Use concrete tester rebound hammer for strength after
calibration.
Perform test as per standard,if results is more than 100 %
of requirement by calibration graph of hammer continue the
structure.
 
Is This Answer Correct ?    9 Yes 1 No
Shafqat
 
Answer
# 7
NDT testing has to be done and if it fails then go for
recto method that is strengthing of concrete and concern is
not demolish it's time taken and it will effect time and
finacial.
 
Is This Answer Correct ?    7 Yes 4 No
Kishorecivil
 
Answer
# 8
Go for NDT If it is not satisfied go for Core test that
is also failed go for there possibale demolisan that coloum
it is not possible we go for Restrengthing.
 
Is This Answer Correct ?    1 Yes 1 No
Prabhakara Rao.b
 

 
 
 
Other Civil Engineering Interview Questions
 
  Question Asked @ Answers
 
can anybody suggest me or rather send me tutorial of staad pro..iam in real need..thanks..id is:-ankit99991@gmail.com.   1
I have used the proportion of cement:sand:gravel, is 1:2:4. cement and the sand was provided by the company but i provided the gravel. this combination was used to fill 500 cubic ft of wall. now i want to know how much gravel was used in making the wall. can you guys please help me?   2
FOR SAME AMOUNT OF RAINFALL & EQUAL CATCHMENT AREA THEN WHERE RUN OFF WILL BE HIGHEST?   4
At which temperature in deg Celsius Asphalt is used for the pavement of Roads?   2
in railway engineering, what are the types of guages? what is its size,length & thickness?   4
How to evaluate the elastic modulus of soil from the plate load test result? for example ..one of test results are here Max. settement =4.56mm(at 900kPa) Residual settlement = 4.02mm Maximum pressure on soil 900kpa Soil bearing capacity 300kpa Plate diameter=300mm Thickness =25mm Soil description =Grey, clayey silty SAND with gravels and rock fragments   1
what is stress   4
what is the life span of water proffing plywood for concreteshuttering work ivrcl 2
design data for small rc square water tanks L&T 1
How to calculate the amount of Brick,cement & sand required for 1 cum of 230mm thick brick work with ratio 1:5 please give me an answer with detailed step Lanco 11
What is the neutral axis depth factor formula NTPC 1
What are the Noms/8hr for Concrete Work for Mason,Carpenter,Steel Fixer   2
 
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