Abstrak Beton merupakan komponen vital pada suatu konstruksi. Salah satunya beton ringan yang terdiri dari campuran agregat kasar, agregat halus, semen yang dipersatukan oleh air dengan perbandingan yang telah ditentukan. Beton ringan adalah beton yang memiliki berat kurang dari 2000kg/m³, beton ringan biasanya menggunakan agregat atau bahan yang ringan sehingga beton yang di hasilkan juga memiliki berat jenis yang ringanLimbah puntung rokok fillter adalah suatu limbah yang sulit untuk di daur ulang. Puntung rokok fillter berbahan dasar kapas yang merupakan serat yang memiliki sifat ringan, berpori, dan mudah menyerap air. Untuk penggunaan limbah ini sebagai pengganti agregat kasar secara menyeluruh perlu diadakan penelitian yaitu besarnya kuat tekan yang di hasilkan dengan penggantian agregat kasar dari limbah puntung rokok tersebut, job mix yang digunakan sesuai SNI K-125 dengan mengganti sepenuhnya agregat kasar dengan limbah puntung rokok,,job mix untuk 1m³ beton terdiri dari semen 276 Kg, air 214 liter, puntung rokok 148,62 Kg, dan pasir sebanyak 828 Kg.Dari penelitian di atas diperoleh nilai kuat tekan pada umur beton 28 hari tertinggi mencapai K-115,56 yang berarti telah mencapai target untuk paving beton sebesar K-100. Sedangkan untuk nilai absorsinya cukup tinggi dari pengujian berturut-turut selama ¼ jam, 1 jam, 4 jam, dan 24 jam di hasilkan nilai rata-rata sebesar 0,116 liter, 0,269 liter, 0,374 liter, 0,699 liter. Hasil penelitian dari berat jenis beton dengan agregat kasar limbah puntung rokok mencapai rata-rata 1831,11 Kg/m³, untuk penelitian angka pori di hasilkan nilai rata-rata mencapai 0,2854, selanjutnya hasil nilai porositas diperoleh rata-rata mencapai 0,222016. Kata kunci: Beton ringan,Beton berpori, Limbah puntung rokok fillter
Material exploitation, especially the use of sand as the main component of concrete, needs to be reduced. The purpose of this research is to find out the value of compressive strength from the addition of rocks to achieve compressive strength according to the standard mix design of paving blocks. This research was conducted at the University's Civil Engineering Laboratory. Attending a trial and error method, the samples tested were cube with a size of 15 x 15 x 15 cm with 3 pieces with the quality of paving planned and K-225 or 18.675 MPa. The method of making specimens includes semi-mechanics using a concrete mixer. Fractional waste The rock is crushed into small pieces and then put in messin abrassion to get smaller pieces of rock and become grains of sand. Test result obtained a percentage of 25% indicating a compressive strength of 22.1 MPa, 20.3 MPa, 19.9MPa, and has an average value of 21.8 MPa. Then the results from the substitutionexperience i increase against compressive strength. Keywords: Coral, Fine Aggregate, Compressive Strength
Success of fail of project some times because of minimize planning project activity, and control is uneffectively, so the activity of project is not efficient. It has consequences later, low quality, and increasing budget of project. Project manajement must be doing from start to finish. Case studying in this researeh was bilding dormitories of Pondok Pesantren Sananul Huda. As insfrasstrukture for teaching and learning in Pondok Pesantren Sananul Huda area. The location is in Desa sumberagung, Kecamatan Selorejo, Kabupaten Blitar. PERT and CPM method used to know how long this project will be finished and found probabilities time acceleration tis project. The purpose of this research was for knowing time efficiency considered from these methods. The result of anality time manajement used PERT and CPM method, be found critical stripe as long as 102 work days. And be found optimal time with acceleration till 5 day, exactly 97 work days and increasing cost was Rp. 959.058.508;. Keywords: Critical Part Method (CPM), Program Evaluation and Review Technique (PERT)
The supervisory consultant is one of the parties that play a very important role in quality control in construction work. The purpose of this study is to evaluate the performance and role of the supervisory consultant in controlling quality in construction work based on the results of the analysis and observations of weekly and monthly reports made by the supervisory consultant. The data analysis method used in this study is qualitative with comparative and implementation techniques, namely comparing the supervisory consultant's monthly report with Minister of Public Works Regulation No. 06 / PRT / M / 2008 2008 and Guidebook for Procedure for Reporting the Results of Building Supervision, Module - 5 Department of Public Works. The results of the analysis showed that the performance of the supervisory consultant was not optimal in terms of quality control because the supervisory consultant did not follow the reference or method in accordance with existing regulations. Factors less than optimal performance of consultants are influenced by various factors such as lack of labor, unfavorable weather so that it cannot be done overtime until night and the provision of material experiences extinction.Konsultan pengawas merupakan salah satu pihak yang sangat berperan pada pengendalian mutu dalam pekerjaan konstruksi. Tujuan dari penelitian ini adalah untuk mengevaluasi dari kinerja dan peranan konsultan pengawas dalam mengendalikan mutu pada pekerjaan konstruksi berdasarkan dari hasil analisa dan pengamatan laporan mingguan dan bulanan yang dibuat oleh konsultan pengawas. Metode analisis data yang digunakan dalam penelitian ini secara kualitatif dengan teknik komparasi dan implementasi yaitu membandingkan laporan bulanan konsultan pengawas dengan Peraturan Menteri Pekerjaan Umum No. 06/PRT/M/2008 tahun 2008 dan Buku panduan Tata cara Pelaporan Hasil Pengawasan Bangunan Gedung, Modul – 5 Departemen Pekerjaan Umum. Hasil analisis diperoleh bahwa kinerja konsultan pengawas kurang optimal dalam hal pengendalian mutu dikarenakan konsultan pengawas tidak mengikuti acuan atau metode sesuai dengan peraturan yang ada. Faktor kurang optimalnya kinerja konsultan dipengaruhi berbagai macam faktor seperti kurangnya tenaga kerja, cuaca yang kurang mendukung sehingga tidak dapat dilakukan lembur sampai malam hari dan penyediaan bahan-bahan material mengalami keterlamabatan.
Dr.Soedomo Trenggalek Hospital has a goal to realize an optimal service for the community through the availability of supporting infrastructures. One of them is the Blood Bank Building Hospital. This study aims to determine how much cost efficiency and time efficiency of the Blood Bank Building construction project at Dr. Soedomo Trenggalek Hospital are accelerated for seven days. The research method used is the "S" Curve method to monitor project implementation in terms of cost and work performance. Furthermore, the Arrow Diagram method is used to speed up the time of project implementation by determining the critical path and paying attention to activities on the critical path to know the activities that need to be accelerated. The Blood Bank Building Construction Project was scheduled to be completed for 120 days with a Budget Plan of Rp. 891,374,000.00. After accelerating seven days to 113 days, a cost increase of Rp. 20,772,189.68. After accelerating 12 days from 120 to 108 days, an increase in costs of Rp. 26,627,020.90.Rumah Sakit Dr.Soedomo Trenggalek memiliki tujuan untuk mewujudkan pelayanan yang optimal bagi masyarakat melalui tersedianya sarana infrastruktur pendukung. Salah satunya adalah Gedung Bank Darah Rumah Sakit. Penelitian ini bertujuan untuk mengetahui berapa efisiensi biaya dan efisiensi waktu proyek pembangunan Gedung Bank Darah Rumah Sakit Dr.Soedomo Trenggalek jika dilakukan percepatan selama 7 hari. Metode penelitian yang digunakan adalah metode Kurva “S” untuk memantau pelaksanaan proyek ditinjau dari segi biaya dan prestasi kerja. Selanjutnya, metode Diagram Panah digunakan untuk mempercepat waktu pelaksanaan proyek dengan cara menentukan jalur kritis dan memperhatikan kegiatan – kegiatan pada jalur kritis agar dapat mengetahui kegiatan – kegiatan yang perlu dipercepat. Dalam Proyek Pembangunan Gedung Bank Darah tersebut dijadwalkan selesai selama 120 hari dengan Rencana Anggaran Biaya sebesar Rp. 891.374.000,00. Setelah dilakukan percepatan 7 hari menjadi 113 hari didapat kenaikan biaya sebesar Rp. 20.772.189,68. Setelah dilakukan percepatan 12 hari dari 120 menjadi 108 hari didapat kenaikan biaya sebesar Rp. 26.627.020,90.
In the field of construction, the land is a media base of the core of a building. The soil structure, which consists mainly of clay in its component, has montmorillonite properties. The level of soil stability that is montmorillonite is not good enough for the support of building infrastructure. This study uses coffee grounds waste and variations of 5%, 10%, 15%, and 20% in montmorillonite soil. In the soil stability test using montmorillonite soil mix specimens with coffee grounds waste, the content weight, consistency limit, and soil compaction tests were conducted. On the results of this study, the structure of the native soil categorized as montmorillonite with adding coffee pulp on additions varied to a maximum of 20%. The Liquid Limit value rises to 43%. The Plastic Limit value increased to 31.64% so that the plastic index could rise to 11.36 %. When the compaction test with the condition of the solid specimen is perfect, the dry volume of the original soil is 6.72 gr/cm 3. After adding coffee pulp waste by 20%, the bare amount increases to 10.56 gr/cm3.Dalam bidang konstruksi, tanah adalah suatu media pijakan inti dari sebuah bangunan. Struktur Tanah yang sebagian besar terdiri dari lempung didalam komponennya, memiliki sifat monmorillonite. Tingkat stabilitas tanah yang bersifat montmorillonite terbilang kurang bagus terhadap daya topang infrastruktur bangunan. Penelitian ini menggunakan limbah ampas kopi pada variasi penambahan 5%, 10%, 15% dan 20% pada tanah montmorillonite. Pada uji stabilitas tanah dengan menggunakan benda uji mix tanah montmorillonite dengan limbah ampas kopi, dilakukan Uji Berat Isi, Batas konsistensi (Atterberg Limit) dan Pemadatan Tanah (Proctor). Pada hasil penelitian struktur tanah asli yang dikategorikan montmoroillonite, setelah ditambah ampas kopi pada penambahan variasi maksimal sebesar 20%, nilai Liquid Limit naik menjadi 43% dan nilai Plastic Limit mengalami kenaikan menjadi 31,64%, sehingga index plastic dapat mengalami peningkatan menjadi 11,36%. Saat uji pemadatan dengan kondisi benda uji padat sempurna, berat volume kering tanah asli sebesar 6,72 gr/cm3 dan setelah ditambahkan limbah ampas kopi sebesar 20% mengalami peningkatan berat volume kering menjadi 10,56 gr/cm3.
Reinforced concrete is a composite element consisting of concrete and reinforcing steel planted in concrete. The main properties of concrete are strong in compressive forces but weak in tensile forces. Reinforcing steel in concrete serves to cover these weaknesses, namely resisting tensile forces and some compressive forces. The strength of the concrete itself is based on mixed proportions, conditions of temperature and humidity where the concrete will harden. Plates flates is the right choice for the owner loss of aesthetics due to transverse beam. From the calculation results it turns out that no special shear reinforcement is needed, adjustments by enlarging the column dimensions, plate strength or thickness. = 694 KN> Vn = 361,512 KN. To produce space efficiency that is expected, it is better to use plate flates. In terms of calculations it turns out that the plate flates need more reinforcement when compared to conventional plates. Keywords: conventional plate, plate flate,
Road construction in Indonesia mostly uses concrete asphalt. This study aims to determine the optimum level of asphalt produced in a concrete asphalt mixture with tofu pulp filler, in terms of the stability of Marshall, flow, VIM, VMA, VFB, and MQ. Asphalt concrete mixture in this study uses AC 60/70 asphalt. This study uses 5 samples, each using a different asphalt content, namely: 5%, 5.5%, 6%, 6.5%, 7%, with one sample consisting of 3 variants. The material used is a coarse coral aggregate held by sieve No. 8 (2,36mm). Fine aggregate with Brantas river sand passes filter no.8 (2.36mm), and fillers use tahas pulp bypassing filter no. 200 (0.075mm). The results of this study on Marshall characteristics obtained asphalt content of 5% and 6% with the average value of stability 712 and 881, Flow 3.3 mm and 2.4 mm, VIM 4.65% and 4.24% VMA 19.29% and 17.87%, VFB values of 75.41% and 76.15%, and MQ 271 kg / mm and 433kg / mm.Pembuatan konstruksi jalan di Indonesia banyak menggunakan aspal beton. Penelitian ini bertujuan untuk mengetahui kadar aspal optimum yang dihasilkan pada campuran aspal beton dengan filler ampas tahu, ditinjau dari stabilitas Marshall, flow, VIM, VMA, VFB, dan MQ. Campuran aspal beton dalam penelitian ini menggunakan aspal minyak AC 60/70. Penelitian ini menggunakan 5 sampel, masing-masing menggunakan kadar aspal yang berbeda yaitu: 5%, 5,5%, 6%, 6,5%, 7%, dengan satu sampel terdiri dari 3 varian. Tahapan penelitian yaitu agregat kasar batu koral tertahan saringan no. 8 (2,36mm), agregat halus dengan pasir sungai brantas lolos saringan no.8 (2,36mm), dan filler menggunakan ampas tahus dengan lolos saringan no. 200 (0,075mm). Hasil dari penelitian ini pada karakteristik Marshall didapat kadar aspal otimum 5% dan 6% dengan nilai rerata stabilitas 712 dan 881, Flow 3,3 mmdan 2,4 mm, VIM 4,65% dan 4,24% VMA 19,29% dan 17,87%, nilai VFB 75,41% dan 76,15%, dan MQ 271 kg/mm dan 433kg/mm.
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