Matakuliah
Tahun
: S0793 – Teknologi Bahan Konstruksi
: 2009
BETON RINGAN
Pertemuan 10
Learning outcomes
• Mahasiswa dapat menjelaskan persyaratan dan tata
cara pembuatan beton ringan
Bina Nusantara University
3
Outline Materi
•
•
•
•
Defenisi Beton Ringan
Aplikasi Beton Ringan
Persyaratan Beton Ringan
Cara Pembuatan Beton Ringan
Bina Nusantara University
4
JENIS BETON BERDASARKAN BERAT
• Beton Berat
- beton dengan berat isi lebih besar dari beton
normal yaitu > 2400 kg/m3
- untuk menahan radiasi, benturan.
- digunakan agregat denganberat jenis > 4.0 [
berat jenis agregat beton normal 2.6 ]
• Beton Sedang
• Beton Ringan
- beton dengan berat isi ≤ 1900 kg/m3
Bina Nusantara University
5
Bina Nusantara University
6
Bina Nusantara University
7
SEJARAH
Bina Nusantara University
8
KELEBIHAN BETON RINGAN
• Mengurangi berat sendiri struktur sehingga akan
menghemat tulangan dan pondasi
• Meningkatkan kekedapan terhadap suhu
• Meningkatkan kekedapan terhadap suara
• Mengurangi biaya pengangkutan dan penanganan
elemen pre cast
• Mengurangi biaya form work
Bina Nusantara University
9
METODE PEMBUATAN BETON RINGAN
• Dengan menggunakan Lightweight Aggregate concrete
• Menggunakan admixture yang memberikan “air bubble” kepada
campuran semen biasa
• Foamed Concrete : Foamed concrete is a highly workable, lowdensity material which can incorporate up to 50% entrained air. It is
generally self-leveling, self-compacting and may be pumped
Bina Nusantara University
10
LIGHTWEIGHT AGGREGAT
• Lightweight aggregate concrete can be produced using a
variety of lightweight aggregates. Lightweight aggregates
originate from either
• Natural materials like volcanic pumice/batu apung, tuff,
dll.
• The thermal treatment of natural raw materials like clay,
slate or shale i.e. Leca
• Manufacture from industrial by-products such as fly ash,
i.e. Lytag
• Processing of industrial by-products like FBA or slag
Bina Nusantara University
11
Lightweight Aggregates
• Expanded clay (left)
• Expanded shale (right)
Bina Nusantara University
12
JENIS AGREGAT DAN KEKUATAN BETON
Bina Nusantara University
13
JENIS AGREGAT DAN KEKUATAN BETON
Bina Nusantara University
14
Tata Cara Rencana Pembuatan Campuran Beton
Ringan dengan Aggerat Ringan
• SNI 03-3449-1994
• Mendapatkan proporsi campuran untuk menghasilkan
beton ringan tanpa bahan tambahan
• Bahan: air, semen, agregat
Bina Nusantara University
15
APLIKASI
Bina Nusantara University
16
trench reinstatement
• is an ideal material for trench
reinstatement (the filling of
trenches dug in roads when
pipes are laid or repairs are
carried out). The traditional
methods of filling trenches in the
roads, i.e. the use of granular fill
materials, result in settlement
and damage to the road and
potentially, to the pipes. With
foamed concrete there is no
settlement; and because the
foamed concrete is very fluid, it
will fill any voids and cavities in
the trench sides
Bina Nusantara University
17
Bridge Abutment
• is particularly suitable for
bridge abutments
because it does not
impose the large lateral
loads, which can be a
problem when using
traditional granular
materials. With traditional
abutments, there is a lot
of sideways pressure
against the bridge walls
caused by the materials
used and their
compaction.
Bina Nusantara University
18
Void Filling
• is also very useful
for void filling. As it
is very fluid it will
pour into even the
most inaccessible
places. It can be
used for planned
work, but also in
emergencies to
provide stability
and support very
quickly.
Bina Nusantara University
19
Roofing Insulation
• has been supplied for roofing insulating. A low density
mix is chosen and the resulting air content gives the
material excellent thermal insulation properties. The low
density also has the advantage that it does not
significantly add to the overall weight of the roof.
Bina Nusantara University
20
Road Sub-Base
•
an be used to make road
structures less heavy. This
helps solve the problem where
the traditionally heavy road
structures cause severe
settlement of the road,
particularly in areas of soft
ground. By constructing the
road sub-base from a
lightweight material, the overall
weight of the structure can be
greatly reduced
Bina Nusantara University
21
Floor Construction
• provides very good
material for floor
construction. It is ideal
for building sub-floors
quickly and cheaply and
can be used for levelling
terrain and raising floor
levels as well as for
insulation purposes
Bina Nusantara University
22
Lightweight Precast Blocks
Bina Nusantara University
23
Fire Breaks
• The excellent fire resistant properties makes it an ideal
material for fire breaks in buildings where there are large
undivided spaces. It is used to prevent flame penetration
through the services void between floor and ceiling in
modern construction, and also to protect timber floors in
old houses
Bina Nusantara University
24
Sound Insulation
• educes the passage of sound, both from background
noise and due to impact. It is, therefore, an ideal material
for internal walls and suspended floors in multi-storey
buildings, especially ones with communal use
Bina Nusantara University
25
Tata Cara Pembuatan Beton Ringan
• Tata Cara Rencana Pembuatan Campuran Beton
Ringan dengan Agregat Ringan SNI: 03-3449-1994
• Bahan yang digunakan adalah air, semen dan agregat
ringan
• Pemilihan proporsi campuran beton ringan ditentukan
berdasarkan hubungan kuat tekan terhadap berat jenis,
berat jenis terhadap jumlah fraksi agregat ringan dan
kuat hancur agregat tidak boleh lebih besar dari kuat
tekan adukan
Bina Nusantara University
26