Infrastructure contruction has expanded in Penajam Paser Utara brought the effect of wall materials. Nowdays, Building construction with light brick preferably as an alternative than red brick it self. The aim of this research is to conduct SWOT Analysis between light brick and red brick in construction build in Penajam Paser Utara. According to question form that was spread in to local government has shown the results, The red brick sited in forth coordinate (quadrant) compare with light brick in second quadrant. This quadrant position provide using light bricks preferably were been selected than common red brick

Perilaku tanah seringkali menjadi tantangan tersendiri bagi seorang Civil Engineering dalam merencanakan suatu konstruksi baik untuk jalan ataupun bangunan. Tanah lempung memiliki sifat ekspansif yang artinya pada saat musim kemarau tanah lempung memiliki sifat kaku dan daya dukungnya tinggi tetapi pada saat musim penghujan, kadar air meningkat dan menjadi jenuh,  tanah akan mengembang dan daya dukungnya menurun sehingga berbahaya bagi bangunan dan pondasi. Salah satu metode perbaikan tanah yang mulai banyak dikembangkan saat ini adalah dengan menambahkan zat adiktif seperti semen untuk membentuk tanah menjadi soil-cement guna memperbaiki sifat mekanis tanah dan meningkatkan daya dukungnya. Dalam penelitian ini dilakukan analisa perubahan nilai CBR tanah lempung low plasticity yang diberi penambahan semen dengan variasi penambahan sebesar 5%, 10% dan 15% terhadap ɤd lempung. Hasil pengujian sampel setelah dilakukan pemeraman dan perendaman ternyata terjadi peningkatan nilai CBR yang cukup signifikan dimana pada penambahan 5% semen terjadi peningkatan sebesar 3 kali lipat dan pada penambahan 15% semen terjadi peningkatan hampir 4 kali lipat dibandingkat dengan tanah lempung yang tidak di stabilisasi.   Soil behavior is often a challenge for a Civil Engineer in planning a construction for roads or buildings. Clay soils have expansive properties, which means that during the dry season, clay soils are  stiff  and have high bearing capacity, but during the rainy season, the water content increases become saturated that the soil expands and its bearing capacity decreases, making it dangerous for buildings and foundations. One method of soil improvement that is being developed at this time is by adding addictive agent such as cement to make soil into soil-cement in order to improve the mechanical properties of the soil and increase its bearing capacity. In this study, an analysis in the CBR value of low plasticity clay was carried out with the addition cement with variations of 5%, 10% and 15% of the ɤd  clay. The results of the sample test after curing and soaking turned out to be a significant increase in the CBR value where at the addition of 5% cement there was an increase of 3 times and at the addition of 15% cement there was an increase of almost 4 times compared to unstabilized clay.

Di daerah perkotaan terutama di kota-kota besar seperti kota balikpapan, pertambahan penduduk dan kemajuan jaman mengakibatkan semakin sulit akan lahan untuk bangunan yang memenuhi kebutuhan sehari-hari. Dalam pembangunan suatu proyek konstruksi, pengendalian biaya dan waktu proyek merupakan hal yang penting dalam proses pengolahan manajemen proyek. Proyek penambahan bangunan yang sudah ada membutuhkan 140 hari kerja kalender untuk menyelesaikan bangunan penambahan, dengan biaya pekerjan sebesar Rp.642.642.000. Analisis pengendalian dilakukan karna mengalami kelalaian konsultan perencana dalam merencanakan struktur, dimana perencana tidak memperhatikan jenis tanah dan merencanakan berdasarkan pengalaman saja yang berakibat keterlambatan. Dengan dilakukannya optimasi biaya dan waktu menggunakan metode Time Cost Trade Off (TCTO) pada proyek pembangunan penambahan KM.12 Karang Joang Balikpapan, maka waktu dan biaya optimum akibat penambahan tenaga kerja didapat pada 123,62 hari kerja dengan total  biaya proyek sebesar Rp.634.106.512 dengan efesiensi waktu proyek sebanyak 16,38 hari dan efesiensi biaya proyek sebesar Rp.8.535.488.   In urban areas, especially in big cities such as Balikpapan, the population increase and the progress of the times have made it increasingly difficult to land for buildings that meet daily needs. In the construction of a construction project, controlling project costs and time is important in the processing of project management. Project to add an existing building is spending 140 calendar working days to complete the addition building, with a workforce cost of Rp.642,642,000. Control analysis is carried out because the planner consultants experience negligence in planning the structure, where the planner does not pay attention to the type of soil and plan based on experience alone which results in delays. By optimizing the cost and time using the Time Cost Trade Off method in the development project for the addition of KM.12 Karang Joang Balikpapan, the optimum time and costs due to the addition of labor were obtained at 123.62 working days with a total project cost of Rp.634,106 .512 with a project time efficiency of 16.38 days and a project cost efficiency of Rp. 8,535,488.

Microbially induced calcite precipitation (MICP) is a soil improvement technique using microorganisms that can change and improve mechanical properties. This technology has been explored and is promising with potential in a variety of applications. Bacillus subtilis bacteria as much as 6% were added to soil contaminated with 5%, 10%, and 15% coal.  The bacteria used were cultured for 3 days in growth medium. In this study, a direct shear test was used to determine the effect of calcite deposition on the behavior of the shear strength of coal contaminated soil. The results showed that there was an increase in the value of cohesion and internal friction angle as parameters of shear strength after the curing period. MICP stabilization in soil contaminated with 5% coal resulted in an increase in shear strength of three times, while in soil contaminated with 10% and 15% coal there was an increase in shear strength of seven times and fifteen times, compared to the untreated soil