BETON RINGAN Pertemuan 10 Matakuliah : S0793 – Teknologi Bahan Konstruksi Tahun : 2009 BETON RINGAN Pertemuan 10

Learning outcomes Mahasiswa dapat menjelaskan persyaratan dan tata cara pembuatan beton ringan Bina Nusantara University

Outline Materi Defenisi Beton Ringan Aplikasi Beton Ringan Persyaratan Beton Ringan Cara Pembuatan Beton Ringan Bina Nusantara University

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

Bina Nusantara University

Bina Nusantara University

SEJARAH Bina Nusantara University

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

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, low-density material which can incorporate up to 50% entrained air. It is generally self-leveling, self-compacting and may be pumped Bina Nusantara University

Natural materials like volcanic pumice/batu apung, tuff, dll. 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

Lightweight Aggregates Expanded clay (left) Expanded shale (right) Bina Nusantara University

JENIS AGREGAT DAN KEKUATAN BETON Bina Nusantara University

JENIS AGREGAT DAN KEKUATAN BETON Bina Nusantara University

Bahan: air, semen, agregat 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

APLIKASI Bina Nusantara University

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

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

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

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

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

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

Lightweight Precast Blocks Bina Nusantara University

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

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

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