PENGARUH KEBIJAKAN KESELAMATAN DAN KESEHATAN KERJA (K3) TERHADAP KINERJA KARYAWAN PT. HUTAMA KARYA

Pembangunan infrastruktur yang dilakukan oleh perusahaan konstruksi yang dibentuk pemerintah ataupun swasta merupakan salah satu langkah yang sangat berperan dalam mengembangkan dan meningkatkan perekonomian di suatu negara khususnya di Indonesia. Pekerjaan konstruksi adalah jenis pekerjaan dengan risiko kecelakaan dan penyakit akibat kerja yang tinggi dan dapat mengakibatkan terjadinya kerugian khususnya bagi pekerja. Kondisi ini berdampak terhadap kualitas kerja, kinerja karyawan, dan produktifitas kerja perusahaan. Perusahaan konstruksi harus lebih bersungguh-sungguh dalam menerapkan nilai-nilai dan kebijakan keselamatan dan kesehatan kerja (K3) pada area kerja. Hal ini bertujuan untuk meminimalisir terjadinya kasus kecelakaan kerja yang terus meningkat pada pekerjaan konstruksi. Tujuan dilakukan penelitian ini adalah mengidentifikasi dan menganalisa faktor kebijakan K3 apa saja yang berpengaruh terhadap kinerja karyawan konstruksi serta menganalisa faktor yang dominan memberi pengaruh terhadap kinerja karyawan konstruksi. Jenis penelitian yang digunakan yaitu penelitian deskriptif dengan pendekatan kuantitatif dengan data primer diperoleh melalui penyebaran kuesioner kepada responden. Hasil penelitian yang diperoleh menunjukan bahwa terdapat lima faktor yang berpengaruh terhadap kinerja karyawan konstruksi yaitu Komitmen Top Management, Peraturan dan Prosedur K3, Keterlibatan dan Komunikasi Pekerja, Kompetensi Pekerja, dan Lingkungan Kerja. Dan diketahui faktor kebijakan K3 yang dominan berpengaruh terhadap kinerja karyawan konstruksi adalah adanya pengawasan terhadap pelaksanaan K3 pada perusahaan konstruks

The effect of utilizing silica fume and eggshell ash on the geotechnical properties of soft kaolin clay

The application of chemical stabilizer in soil stabilization can effectively reduce the negative environmental impact in the construction industry. However, the stabilization of soft clay remains a challenge due to the costly and non-eco-friendly materials such as cement and lime. This research demonstrates the combination of SF and ESA in stabilizing the kaolin soils, based on the basic engineering properties and undrained shear strength (USS). Its effect was studied via the inclusion as cement replacement material in kaolin soil at 2, 4 and 6% (by weight of dry soft kaolin clay soil) of SF and ESA substitutions of 3, 6 and 9% (by weight of dry soft kaolin clay and SF content). The result shows a considerably lower specific gravity (4.9% reduction), reduced plasticity index (PI)(48.4% reduction), decreased maximum dry density (MDD) (5.5% reduction), increased optimum moisture content (OMC)(8.7% increment), and higher USS (68.8%). In conclusion, the combinations of SF and ESA as soil stabilization agents successfully enhance the soil strength of the kaolin opening a route to the low cost and eco-friendly materials in soil stabilization

Effect of Optimum Utilization of Silica Fume and Eggshell Ash to the Engineering Properties of Expansive Soil

The utilization of substance stabilizer in soil improvement can diminish the obstructive ecological effect in the development business, and respond as the soil stabilizers to the kaolin clay soils. In any case, the improvement of kaolin clay stays a test because of the significant expense and non-eco-accommodating materials like concrete and lime. This examination exhibits the capacity of SF in the mix with ESA in stabilizing the delicate kaolin clay soils, by means of particle size distribution (PSD), specific gravity, Atterberg limits, compaction parameters and undrained shear strength (USS) parameters. Its impact on the undrained shear strength upgrade was concentrated through the concrete substitution material in kaolin clay soil at the replacement degree of 2%, 4% and 6% (by dry weight of kaolin clay soil) of SF and ESA replacements of 3%, 6% and 9% (by dry weight of kaolin clay and SF content). The consideration of SF with ESA shows a lower specific gravity (4.9% decrease), lower plasticity index (PI) (48.4% decrease), diminished maximum dry density (MDD) (5.5% decrease), expanded in optimum moisture content (OMC) (8.7% increase), and higher USS (68.8%) when contrasted with the untreated kaolin clay soils and those treated with SF. The blends of SF and ESA as soil adjustment specialists effectively upgrade the undrained shear strength of the kaolin clay soils up to 68.8% strength improvement with the best percentage of 6% SF and 6% ESA for optimum enhancement of the expansive soil, which minimizing the expenses and as an eco-accommodating materials in soil improvement