Environmental Engineering Reference
In-Depth Information
batches both by weight and by volume. The
decrease (negative) or increase (positive) percent-
ages for the different parameters are shown as
compared to the reference batch, except the coef-
ficient of capillary water absorption value in the
batches by weight, which was calculated as com-
pared to the value obtained for the aeV 0-12 mm
standard batch with a W/c = 1.2 ratio.
in view of the conclusions obtained in this study
and the information that has been presented, we
can establish that:
- The batches by volume seem to be more appro-
priate for the production of concretes with vol-
canic slag light aggregates.
- To replace the aeV 0-12 mm with 0-8 mm frac-
tion by volume improves the thermal character-
istics of the lightweight concrete in the Bhic.
- in view of the improving efect that the addi-
tion of the Thermocal
TM
mortar, which replaces
cement in different percentages, has on the coef-
ficient of absorption, we can conclude that the
+10%aPe 0-6 mm and the 90%ceM 10%aPe
0-6 mm batches can present improvements on
this parameter by adding Thermocal
TM
mortar
to these mixtures.
- The addition of 20%aPe 0-6 mm produces an
important and significant improvement in the
lightweight aggregate used in the manufacture
of Bhic. This percentage corresponds with
the conclusions of several researchers, such as
Demirboğa (Demirboğa & Gül, 2003), hossain
(hossain & lachemi, 2007) (hossain, 2003),
who in their numerous studies stated that the
optimum percentage of replacement of cement
with pozzolanic additions in lightweight con-
crete is 20%.
Table 13. summary chart for the capillary water
absorption coefficient.
Dosage
type
∆Water
ab-sor. (±%)
Batch
ReFeRence MiXTURe by weight Ref. Value
100%aeV 0-12 mm (a/c=1.2)
by weight Ref. Value
100%aeV 0-8 mm by weight
±0.00
100%aeV 0-8 mm by volume ±0.00
90%ceM 10%aPn 0-5 mm by weight +8.00
90%ceM 10%aPn 0-5 mm by volume
+200.00
90%ceM 10%aPe 0-6 mm by volume
+5.00
+10 aPe 0-6 mm
by weight
+12.0
+10 aPe 0-6 mm
by volume +30.00
+20 aPe 0-6 mm
by volume +14.00
by volume
+65.00
+30 aPe 0-6 mm
90%ceM 10%TheR
by volume
-12.00
80%ceM 20%TheR
by volume
-33.00
70%ceM 30%TheR
by volume -87.00
Table 14.
summary chart for the thermal conductivity
coefficient.
Dosage
type
Batch
∆ λ (±% )
ReFeRence MiXTURe
by weight
Ref. Value
by weight
-5.56
100%aeV 0-12 mm (a/c=1.2)
100%aeV 0-8 mm
by weight
-8.89
100%aeV 0-8 mm
by volume -32.22
90%ceM 10%aPn 0-5 mm
by weight
-6.67
90%ceM 10%aPn 0-5 mm
by volume +42.22
90%ceM 10%aPe 0-6 mm
by volume
+27.78
by weight
+10 aPe 0-6 mm
+18.89
+10 aPe 0-6 mm
by volume -43.33
+20 aPe 0-6 mm
by volume -41.11
+30 aPe 0-6 mm
by volume -42.22
90%ceM 10%TheR
by volume
-34.44
80%ceM 20%TheR
by volume
-42.22
70%ceM 30%TheR
by volume -31.11
Table 12.
summary chart for the dry density (28 days)
results.
- The 70%ceM 30%TheR batch is the most
suitable mixture to be used in exposed Bhic
non structural walls.
Dosage
type
∆Dry den-
sity (±%)
Batch
ReFeRence MiXTURe by weight Ref. Value
100%aeV 0-12 mm (a/c=1.2)
by weight
±0
100%aeV 0-8 mm by weight
-5.00
100%aeV 0-8 mm by volume -14.00
90%ceM 10%aPn 0-5 mm by weight -11.00
90%ceM 10%aPn 0-5 mm by volume -16.00
90%ceM 10%aPe 0-6 mm by volume
-8.00
+10 aPe 0-6 mm
by weight
-12.80
+10 aPe 0-6 mm by volume -16.96
+20 aPe 0-6 mm by volume -7.00
+30 aPe 0-6 mm by volume -21.41
90%ceM 10%TheR by volume
-20.00
80%ceM 20%TheR by volume
-15.00
70%ceM 30%TheR
ReFeRences
Demirboģa & Gül. 2003. The effect of expanded perlite
aggregate, silica fume and fly ash on the thermal con-
ductivity of lightweight concrete.
Cement and Con-
crete Research
33: 723-727.
Demirdag, s. & Gündüz, l. 2008. strength properties of
volcanic slag aggregate lightweight concrete for high
performance masonry units.
Construction and Build-
ing Materials
22: 135-142.
Guigou Fernández, c. 1997.
Los hormigones cavernosos
con áridos canarios.
las Palmas de Gran canaria:
Universidad de las Palmas de Gran canaria.
by volume -16.00
