Concrete is the most widely used material as the main material in construction. As time progresses, human needs also increase, so in this study, wood waste was used into concrete mix with a normal concrete compressive strength value of 20 MPa using aggregate from the Jeneberang River. In this study, using sawdust waste to be utilized in concrete with variations of 0%, 3%, 6% and 9% with the aim of research to find out how the effect of sawdust waste into concrete mix with predetermined variations. The implementation method uses the SNI method by making test objects in the form of cylinders and blocks at the Indonesian Christian University Paul Laboratory.                                                                                                           From the results of the research conducted, it was found that the effect of sawdust waste mixed into the concrete mixture showed the value of the compressive strength, tensile strength and flexural strength of the concrete increased by 3% then decreased in variations of 6% and 9% but at the addition of 3% the strength value The compressive strength, tensile strength and flexural strength of concrete decreased compared to normal concrete.

The appIication off occupationaI heaIth and sahfety (K3) is never dry in the context of the scientific ocean. Either in an academic research or in a practical study. K3 issues are constantly raised in the discussion of academic papers, be it journals or final assignments. Of course, the "intersection" with the "knife" which is called "research". On this occasion, the focus of the researcher was the construction project work in the renovation of the South Sulawesi Education Quality Assurance Institute (LPMP) building using quantitative descriptive methods. Namely describing the application of K3 and analyzing the constrain ts in implementing K3 in the project. Statistical methods are used to determine the percentage of respondents' answers or calculated by formulas. The resuIts off research that hass been carriedt out in the building renovation project off the Education Quality Assurance Institute (LPMP) of South Sulawesi regarding the implementation of Occupational Safety & Health (K3) are carried out quite well. The obstacle to the implementation of Occupational Safety & Health is the lack of awareness and knowledge of workers about Occupational Safety and Health (K3). In addition, the company is also less consistent in implementing Occupational Health and Safety.

Mata Allo River is located in Enrekang, South Sulawesi. a river that has a fairly abundant source of aggregate material that has been used by the local community as a concrete-making material in the construction of small-scale construction. This study aims to determine the development of concrete strength based on concrete compressive strength, split tensile strength, flexural strength, and modulus of elasticity in normal quality concrete mixtures based on variations in the Water Cement Factor (FAS), namely Variations 0,49, 0,52 and 0,55 where the variation with the highest compressive strength is used to further testing. The Mix Design method used is the American Concrete Institute (ACI) method with a design concrete quality of 25 MPa. From the results of the study, the highest strength value was found in the FAS variation of 0,49 with an average compressive strength of 7 days, 14 days, 21 days, and 28 days, respectively, with a compressive strength of 16,977 MPa, 23,301 MPa, 25,276 MPa, and 26,691 MPa. The results of the research carried out, the characteristics produced from the Mata Allo river meet the SNI specification standard to be used as a concrete mixture.

Penggunaan peralatan konstruksi sangat berpengaruh terhadap pekerjaan di dunia teknik sipil, dalam  hal ini khususnya alat berat. Sebagai upaya peningkatan produksi pertanian di provinsi Sulawesi Selatan, kementrian Pekerjaan Umum dan Perumahan Rakyat (PUPR) semakin memperluas jaringan irigasi yang sumbernya berasal dari bendungan baliase di Kabupaten Luwu Utara. Pada pembangunan jaringan irigasi ini, proses pekerjaan  masih pada tahap penghamparan dan pemadatan tanah yang menggunakan 4 alat berta yaitu Excavator, Dump Truck, Dozzer, dan Vibrator Roller. Penelitian ini dilakukan dengan metode kuantitatif dengan cara pengamatan langsung dilapangan. Pengolahan data dilakukan untuk mengetahui produktivitas dari masing-masing alat dan melihat apakah peralatan yang digunakan pada pekerjaan penghamparan dan pemadatan tanah ini sinkron. Berdasarkan hasil penelitian diketahui produktivitas Excavator sebesar 631,299 m3/jam, DumpTruck sebesar 335,69 m3/jam, Dozer 603,405 m3/jam, dan Vibrator Roller 4987,5511 m3/jam. Dari hasil dapat dilihat bahwa produktivitas pada peralatan yang digunakan tidak sinkron yang mengakibatkan terjadinya Idle Time pada beberapa alat, oleh karena itu dilakukan perhitungan sinkronisasi alat . Dari hasil perhitungan didapatkan bahwa terjadi penambahan alat pada Dump Truck sebanyak 10 unit agar mengurangi idle time pada peralatan konstruksi.