Civil Engineering Dimension (E-Journal)
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MENCARI PENYEBAB KECELAKAAN DI JALAN TOL SURABAYA-GEMPOL DENGAN ANALISA FREKUENSI DAN CROSSTABULATION
Full text linkThree hunderd and thirteen data of accident between January 1997 and December 1997 were used to determine causes of accident in Surabaya-Gempol Surabaya-Gempol Tol Road. The evaluations were done using Frequency, and Crosstabulation analysis. Frequency analysis was used to determine the blackspots, whereas Crosstabulation analysis using Pearson chi-square and the contingency coefficient was used to identify corelations between fatality of accident, major cause of accident, variables causing major accident and other variables causing accident.The analysis concluded that fatal accidents were caused by sleepiness. The variables causing the accident were; the driver’s physical condition, close spacing of the vehicles and tyre failures. Fatal, and nonfatal accidents were caused by variables as type of vehicle, vehicle manuever and the age of driver as well as the vehicle
PREDIKSI PENGEMBANGAN VOLUME TANAH DI KAWASAN PIER
Full text linkA study on swelling behavior had been conducted on the soil within the PIER industrial estate. It appeared that the swelling was due to the moisture deficiency in the soil, and not because of the existence of expansive clay minerals. Swelling pressures were obtained from oedometer tests on undisturbed samples, whereas for the overall heave the moisture deficit method was applied. By this method, a heave of 5 cm in average could be expected when swelling occurs.
Abstract in Bahasa Indonesia :
Dari hasil penyelidikan tanah yang menyeluruh di kawasan PIER telah diteliti apakah tanahnya termasuk expansif, serta berapa besar pengembangan dan tekanan yang diakibatkan olehnya. Ternyata tanah di kawasan ini mengembang akibat adanya defisiensi kadar-air. Tidak ada indikasi akan adanya mineral-mineral expansif. Besarnya tekanan akibat pengembangan ini diperoleh dari pengujian dalam alat oedometer, sedangkan besarnya pengembangan diperkirakan berdasarkan perbedaan kadar-air volumetrik. Dari perbedaan kadar-air volumetrik dapat diprediksi rata-rata besar pengembangan yang akan terjadi adalah sekitar 5 cm.
Kata kunci : tanah expansif, pengembangan, defisiensi kadar air
RANCANG BANGUN ALAT UJI PERMEABILITAS BETON
Full text linkThe permeability of concrete to water is an important factor that have an effect to durability of concrete structures having direct contact with water, such as port structures, bridges, and basements. In order to identify the permeability nature of concrete, permeability testing is needed. This paper presents a concrete permeability test equipment that was designed and built by the authors. The equipment can be used to conduct permeability tests by flow test as well as by penetration test method. The trial tests of the equipment by flow test method were conducted to 12 concrete speciments with water-cement ratio 0.4 and 0.5 and with wet and dry curing method. The averages of coefficients of permeability obtained differ in the range of 5%-26% from that obtained by using permeability test equipment made by Marui. In addition, the trial tests by penetration method were also conducted to six dry-cured concrete speciments with water-cement ratio 0.4 and 0.5. The averages of coefficients of permeability obtained from the penetration test differs from the flow test 23% and 90% for concrete of water –cement ratio 0.4 and 0.5, respectively.
Abstract in Bahasa Indonesia :
Permeabilitas beton terhadap air merupakan faktor penting yang mempengaruhi durabilitas struktur beton yang berhubungan langsung dengan air, seperti pelabuhan, jembatan, dan basement. Untuk mengetahui karakteristik permeabilitas beton diperlukan uji permeabilitas. Makalah ini menyajikan suatu alat uji permeabilitas beton terhadap air yang dirancang dan dibuat oleh penulis. Dengan alat ini uji permeabilitas beton dapat dilakukan baik dengan cara aliran maupun cara penetrasi. Ujicoba penggunaan alat ini dilakukan dengan cara uji aliran terhadap 12 sampel beton dengan variasi faktor air semen 0.4 dan 0.5 serta variasi curing kering dan basah. Rata-rata koefisien permeabilitas yang diperoleh berbeda sekitar 5%-26% dari yang didapatkan dengan alat uji permeabilitas buatan Marui. Dilakukan pula ujicoba dengan cara penetrasi terhadap enam sampel beton curing kering dengan variasi faktor air semen 0.4 dan 0.5. Rata-rata koefisien permeabilitas yang dari uji penetrasi berbeda dari yang dihasilkan dengan uji aliran masing-masing 23% dan 90% untuk beton dengan faktor air semen 0.4 dan 0.5