Form No : NTH/SL/F/5
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Government of lndia
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(Eastelh Region)
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Naiional Test House
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L I{ E Po I1r
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ANNEXUR.E Test Certilicate
Issue
08107116
No.
Date of
NTH(ER)CIV(G)12016/00970 A
I
No'
14636466 t7 6sg
Code
Pagc
1
No' of Pages
I
Astlesired.thesarnplcofapprox.l8nrmthic|<statedtobeFibreCementBoardofapproximatesize
premises of
test in an oir F'iretr Furnacc at the
r 1000 mm v Boartr of VISAKA make. was subjectetr to
ftrrnished below'
N.T.H. SALT LAKE with the observations
2000 mm
.I.heboartlwasdulyfixedatopenenclofthefurnzrcecoveringallthesurroundingsgapswithfire
gradually
lurnace was
on tlre board. Thereafter, the temperaturl^9f
resistant ceramic lvool wit|rout any loading
minutes'
92
of
temperature upto 986oC in a period
raised from ambient temperature to maximum
:
Date of Tcsting of SamPle
Ambient TemPerature of Furnace Room
l'inre of firing,
in
minutes
o
bs
l.
:
15. 06' 2016
29 degree Celcius'
Average Maximum Temperature attained ^ .
aboveimbient on the unexposed surface ofthc
test specimetr, in degree Celsius
Maximunr Ele'r'ation of insitle
tenrperature of thc furnacc'
in dcgree
(--elsius.
5
548
t0
638
l5
730
30
8r5
60
930
90
976
51.f,
54
69.8
95' I
I 18.4
139.2
t'
tio:r-pt-1eltrltequlctdr'uulg a n d a ft c r th e tes
test
lvas obscrr,ed tluring first 85 minutes of
surl':rce
Prirctically no visible clamage on thc o,t., u.,.*p.",etl
e
rv ed
co
n rl i
period.
2.
formcd at
the test pcriod fronr th-e horizontal cracli
smoliewas intermccliate with no sign of llame'
the centre of thc bo:rrd. The lealiage of
aftcr 90'r'minute
Sonte leahage of smolie lvas ollserverl
r-rf
throug'the brlartl antl flat.e ,f firc u'as tlhscr'ed
3. Aftcr the 92",rminutc of testing, thc cracli ertenclett
seconds appoarcd on the
sustaincd tlanring for tnorc'l''l
through the
gzrp l.nrmett due to
ihe crack rvith
1.9-
uncxposedfacetlftheboard.Tlrcrcbl,lossofintegrity,sp.,clnu,"6.2.3ofls3ti0g:l979.r,r,asolrservctl.
****-,!****
Tested bY
'4A'\''"*
Dr. Somit Ncogi
Scientist SB (Civil)
Approved
Checked bY
t
asls
Scientist
ar
(RPr)
bY
&tK+[z(r,rt"
Debashis RhattacharYYa
Scientist SD (Mechanical)