comparison - gw and rw
DESCRIPTION
abcTRANSCRIPT
7/21/2019 Comparison - Gw and Rw
http://slidepdf.com/reader/full/comparison-gw-and-rw-56d9f0a9ae9df 1/3
TECHNICAL COMPARISON BETWEEN GLASSWOOL & ROCKWOOLINSULATION
Fibreglass Roc!ool
Composition KIMMCO Fiber Glass insulation products are
made of thermally and acoustic efficient
fiberized glass bounded with thermosetting
resin.
made from basalt, dolomite, limestone.
Contains up to "#$ o% '%iberi(e)
materials, which means dust, fiber
migrations.
hot contents
!"M C#$$%
Nil U* +o "#$
urface Finish &
Feel
!s no unfiberised parts '(O") and the
fibers are FINE, fiberglass insulation
products is ha*ing SMOOTH finish and feel
+oc wool comprises of COURSE %iber
and due to the (O" content, it has a
ROUGH finish and feel.
T,er-al
Per%or-a'ces
"hermal
Conducti*ity '*alue)
"hermal +esistance
'+ *alue)
-$ times less density of roc wool productsre/uired to achie*e same thermal performances
-$ times more density of roc wool productsre/uired to achie*e same thermal performances
of Glass wool products
Acos+ic
*er%or-a'ces
0oise +eduction
Coefficient '0+C
*alue)
-$ times less density of roc wool productsre/uired to achie*e same acoustical
performances1
-$ times more density of roc wool productsre/uired to achie*e same acoustical
performances of Glass wool products
+esistance to low
fre/uencies
'-2 to #3% (4),
generated by
(5!C e/uipments
E.celle'+
No )a-age
hots are slowly breaing out from the roc
fibers, under the effects of low fre/uency
*ibrations that lea)s +o saggi'g o%
*ro)c+s/ a') !eig,+ losses.
Fire rating !"M
6#$7
non combustible non combustible
Flame spread
moe de*eloped
!"M 6389:;<-$
0ot o*er -%
0ot o*er %2
:; <-$ file + =<2$
0ot o*er -%
0ot o*er %2
#
7/21/2019 Comparison - Gw and Rw
http://slidepdf.com/reader/full/comparison-gw-and-rw-56d9f0a9ae9df 2/3
Corrosion Fiberglass insulation products )o 'o+ caseor accelera+e corrosio' ince it contains leachable Chloride andulphide any contact to metal with wet or
moist condition may case a') accelera+e
corrosio'. o it is not ad*isable to use on
metal surface if the temp. is less than #%2 >C
5ibration
+esistance
' sample assembly
is *ibrated for =7
hours at a
fre/uency of -2(z
with an amplitudeof 2.= inch )
"he weight loss obser*ed for fiberglass of
#- g9m$ density ? less +,a' 01"$
@ith NILL sagging
"he weight loss obser*ed for +ocwool of
$2 g9m$ density 2 -ore +,a' "010$
@ith # I'c, sagging
Important to know
E%%ec+ o% 3ibra+io' o' +,er-al 4 R 3ale5 a') acos+ic 4 STC 3ale5 *er%or-a'ces
o% *ar+i+io' !all !i+, roc !ool as ca3i+6 %ill i'sla+io' ele-e'+ i' +,e s*eci%ie)
co's+rc+io' o% Par+i+io'
+oc wool insulations made from basalt, dolomite, limestone irrespecti*e of its manufacturer
contains shot contents 'unfiberized materials) in significant /uantities 'some times as high as-%A).
+oc wool insulations when tested for *ibration resistance 'sample assembly is *ibrated *ertically
for =7 hours at a fre/uency of -2 (z with an amplitude of 2.= inches) in accordance to B -=<-
shows the weight loss of around -7.7A and sagging of around %inch.
ound energy is percei*ed as *ibration. @hen roc wool insulation is se) as ca3i+6 %ill
i'sla+io' ele-e'+ i' +,e s*eci%ie) co's+rc+io' o% Par+i+io' Wall/ shots are slowly breaing
out from the roc fibres under the effect of low fre/uency *ibrations which generate sagging of
products. T,is lea)s +o crea+io' o% 3oi)s a') +,s acos+ic 4STC 3ale5 a') +,er-al 4R 3ale5*er%or-a'ces o% *ar+i+io' !all s+ar+s )e+eriora+i'g and these performances are drastically
deteriorated o*er a period of time.
Ho! eas6 +o ,a')le +,e -a+erial
6!6 of handling the material on the obsite is assessed from its "ensile Grab trength which
is a measure of the force re/uired to tear an insulation material apart. ! high tensile grab
-
7/21/2019 Comparison - Gw and Rw
http://slidepdf.com/reader/full/comparison-gw-and-rw-56d9f0a9ae9df 3/3
strength is the reflection of the integrity of the fiberfiber bonding, fiber orientationthroughout the insulation. Fiberglass has almost double the "ensile Grab trength when
compared to the +OCK@OO;. In practical terms the fiberglass does not brea apart upon
handling. Breaage increases cost and compromises efficiency of installation on the grab.
Because of abo*e characteristic FIB6+G;! I MO" !D5I!B;6 FO+ +OOF !0D
@!;; I0:;!"IO0 OF E+660GI066+6D B:I;DI0G "6M. Due to the ecellent
strength and light weight of FIB6+G;! it can be stretched maimum to a*oid any
sagging . "his can a*oid usage of @ire mesh to protect insulation from sagging.
On the contrary +ocwool cannot be stretched1 resulted in sagging after some time 1 that iswhy it needs wire mesh to hold . "his adds Cost of installation.
for K:@!I" I0:;!"I0G M!"6+I!; M!0:F!C":+I0G CO. . !. K.
Dr. Kailash Chandra
Sr. Manager Technical
$