TEKNOLOGI PEMBUATAN BALOK SUSUN KAYU KOMPOSIT BERUKURAN BESAR DARI BALOK-BALOK KAYU BERUKURAN PENDEK DAN KECIL
ABSTRACT: The availability
of large wood
log as construction
material is extremely
decreasing right now.
On the other hand,
the availability of
small and short
wood log is
abundant. The aim
of this research
is to create
a technology to produce large wooden-beam using small wood
logs which is combined with concrete slab.
Sixteen (16) specimen beams sized
50 mm x
80 mm x
2000 mm were
used in this
research. The specimens
consisted of :
(i) 3 non-compound
whole wooden-beams, (ii) 3 compound whole wooden-beams (BUC), (iii) 3
non-compound multiple wooden-beams (BS), (iv) 3 multiple wooden-beams
reinforced with 8 mm diameter
of steel (BSP),
and (v) 4
compound multiple wooden-beams reinforced with 8 mm diameter of
stell (BSCP). The dimension of concrete slab was 25 mm x 250 mm. The bolt with
6 mm diameter was used
as connector with
20 mm left
as shear connector.
The refraction test
was conducted using
load controlled method by
placing concentrated load
on the middle
of the beam.
The result shows
that the multiple
beam capacity is increasing
significantly after combined
with concrete slab
and reinforced with
8 mm diameter
of steel, i.e. 293%
(from 2788 N
become 10966 N).
Even the beam
stiffness is extremely
raising about 695%
(from 45,15 N/mm become 358,2 N/mm). In addition, the
life cycle of beam is more influenced by the deflection limit than the elastic
load limit. This result
gives evidence that
technically, large structured
wooden-beam produced from
small logs has
similar capacity and performance compared with whole beam.
Keywords: multiple
wooden-beam, composite, reinforcement, stiffness
Penulis: Abdul Rochman, Aliem
Sudjatmiko
Kode Jurnal: jptsipildd080004
