Answer / v.kannan

while joining of new roof slab to existing one you should
ensure whether existing roof having reinforcement projection
for joining or not to new reinforcement. if not you want to
remove the concrete up to 150-300 mm from the edge and clean
the surfaces and existing bar then connect the new one and
we can make the concrete through proper form work. and the
grade of the concrete should not less than M25

Answer / anup sharma

Old roof nd new roof are joined using hilty.
Hilty is the process in which a hole is made in the older
roof by drilling and hilty chemical is inserted inside the
holes and finally new reinforcement is inserted inside these
holes such that the older and the newer reinforcement stay
connected. after that form work is done and the new roof is
casted.

Answer / m.haseeb yaquobi

intering rabar to existin roof

Answer / mahendra mohan srivastava, acc

sorry my dear friends we could not joint New RCC to OLd
RCC, because cement and cement concrete has a property of
srink. but we can take care of that we can taper old joint
and then new rcc will cast.

18. What is the thing that might make you happy at your work place?

6 Answers  

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As per Kandal suggestions, we have implemented rolling starts on 140 (+/- 5) degrees and we kept 3 rollars to complete the rolling before falling 125 degrees and the Aggregate AIV is below 22. But When the DBM bed is being rolled 3rd high viabration, (Before 1 plain & low ,2 high Viabrations), the aggregate is getting sharp edge agg. projections are damaged. As the literature is said that, the VG-30 Grade having better control the temp. susceptibility than Penetration grade. if so we could not get this problem at site. But we are facing on site. let me know.

0 Answers  

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Why do we provide development length in RCC?

4 Answers  

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what is the ingrediants of wet mix macadam?construction procedure?

6 Answers  

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what is the quantity of cement sand and metal in a 1m^3 m15 standard concrete

2 Answers   CCE, NCC,

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Kindly furnish the relation between 7 days strength & 28 days compressive strength of Cement Concrete cubes. Can you clarify whether the relation gets altered due to WATER- CEMENT ratio?

3 Answers  

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how we can calaculate cutting lengh for stiruups 6mm dia . column size 20 cm x 30 cm, cover 20mm

8 Answers  

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what will be the weigth of 50 kg/sq cm and 30 kg/sq cm compressive strength solid concrete block of 200 mm ?

3 Answers  

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what is 3.14 indicates for cutting length of stirrups

1 Answers  

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what is ratio of M40?

6 Answers  

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What is the density of DLC & PQC and how it is differ from normal concrete?

0 Answers  

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what is the use of steel rods of 16mm or 20mm used for 4.45mts for closing gutter.one mate consumes how many kgs with a gap of 6inches.

0 Answers   HSSB, JSW,

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