Dalam sistem manajemen infrastruktur, tahap pemeliharaan adalah salah satu bagian yang penting. Biaya penanganan/pemeliharaan jalan yang besar perlu diatasi melalui satu perencanaan pembiayaan. Penelitian ini bertujuan untuk membangun suatu model antara IRI versus waktu pada jalan nasional di wilayah Kota Kupang. Model dibangun berdasarkan data sekunder IRI dan divalidasi menggunakan data primernya. Hasil pemodelan menunjukkan bahwa IRI merupakan fungsi polynomial tingkat -4 dari waktu dengan determinasi R2 = 0,9337 dan 0,8073 masing-masing untuk jalan Pahlawan dan WJ. Lalamentik. Hasil ini dapat digunakan memprediksi biaya pemeliharaan dengan metode memasangkan nilai IRI dan biaya standar yang ada. Dengan demikian untuk beberapa waktu mendatang sudah dapat dipersiapkan biaya yang akan diperlukan dalam rangka mempertahankan kondisi kerataan permukaan jalan.
National road management is not optimal and inefficient, the indications can be seen from the number of early damage cases of the road construction found. Indeed, natural damage to road construction is unavoidable but it becomes a problem if the damage occurs not long after the road product is handed over to the road manager or the government. Then the next question can arise whether the phenomenon of early pavement damage will cause harm to both road users and the government.This study aims to show the thinking framework of financial consequences and apply it through a model due to the occurrence of premature damage. Referring to the concept of benefit value that is represented by road conditions over the life of the service, then roads that have been damaged before their construction ends will result in losses due to loss of benefits. Based on this concept, a simulation was conducted using a national road data. Simulation results show that there is an estimated financial loss due to the occurrence of early damage. For early damage with a condition value of loss of 36 then the estimated loss is Rp 458,257,899.41 per kilometer. Estimated average loss per kilometer for each loss of one unit of condition value is Rp 12,72,386.09. The results of this study also show that roads that do not suffer early damage do not cause losses or losses are zero.
Beton non pasir tergolong beton ringan, karena tidak atau sedikit menggunakan agregat halus (pasir) dalam campurannya. Oleh sebabnya beton ini memiliki pori antar agregat yang besar sehingga karakteristiknya berbeda sama sekali dengan bahan beton pada umumnya yang bersifat kedap, beton non pasir bersifat permeabel (mudah melewatkan air), berdasarkan penelitian kuat tekannya berkisar antara 4MPa - 30 MPa dengan kadar rongga (void content) 15% – 25 %. Oleh karena sifatnya yang unik, jenis beton ini sudah luas diaplikasikan di beberapa Negara sebagai alternative bahan perkerasan jalan, dinding penahan dan bahan dinding rumah/gedung, sedangkan di Indonesia telah diteliti dan diaplikasikan diantaranya sebagai batako ringan, buis beton, perkerasan jalan sampai barang – barang kerajinan dengan variasi penggunaan bahan agregat kasar (batu apung, batu kali, pecahan genteng dan pecahan bata).
Earthquakes as a natural phenomenon have caused many casualties and property.for the examples human casualties from the Aceh earthquake on December 26th, 2006 more than 180 thousand people, the Nias earthquake on March 15th, 2005 have more than 3000 of victims andlast the Yogyakarta earthquake on 27th May 2006 over 5700 victims. Based on observations most of the human victims caused by falling by the collapsed building. One of the elements of the building that is easy to fail when an earthquake strike is part of the wall.The walls are composed of clay bricks or concrete bricks only able to withstand axial force but weak in resisting lateral force perpendicular to the plane. Innovation model of brick to overcome the problem is batako interlocking system. Batako hooks (Interlock block) is a wall building material that has a hook to lock movement due to lateral force. Interlock block is the development of the brick by adding lips on certain sides as a lock. The developed brick model with a dimensions length of 30 cm, height of 15 cm and thickness of 10 cm, which is equipped with bulge / lips on all four sides. The portion of the mixture used is 1 cement: 5 sand. The molded brick was applied to a wall-mounted pairs product with a length of 1.5 m and a height of 1 m. Based on the calculation of material requirement from brick wall, it is known that the specific material for inserting an interlocking brick is 25% less than conventional batako pairs, besides the time required to obtain a neat pair of interlocking bricks is 7.5 minutes faster when compared with Installation of conventional brick.
Di Provinsi NTT juga dapat ditemukan wilayah dengan keterbatasan ketersediaan material agregat (terutama pasir) yang memenuhi standar untuk konstruksi bangunan, daerah tersebut adalah Kabupaten Rote Ndao. Sehingga untuk memenuhi kebutuhan pembangunan dengan tetap bisa memanfaatkan potensi daerah maka dibutuhkan suatu rekayasa material. Di Pulau Rote terdapat deposit batu gamping (tanah putih) di daerah diperbukitan. Sehingga pemanfaatan tanah putih patut dipertimbangkan. Tanah putih sebagai pengganti fraksi pasir alam, sedangkan untuk fraksi agregat kasar tetap mengambil dari quary setempat. Terhadap material tanah putih diberi dua jenis perlakuan, pertama menggunakan material sesuai kondisi fisik asli dari hasil galian di quary dan kedua, fraksi halus butiran yang lolos saringan No.200 tidak dipakai dalam campuran. Hasilnya tanah putih ketika tanah putih dipakai dalam produk mortar, dapat memenuhi kelas mortar M, S dan N, artinya mortar tersebut bisa dipakai dari aplikasi plesteran sampai dengan pasangan batu pondasi dan tembok penahan. Aplikasi tanah putih untuk produk beton dapat menghasilkan kuat tekan beton hingga K300 sehingga dapat dipakai untuk pembangunan box culvert, perkerasan kaku, jembatan komposit sampai rumah tinggal
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