No abstract

Iron sand is a natural resource that many found in North Maluku one of them in Yao Village District Morotai Island. Iron sand mining results have the potential to become an Indonesian commodity but iron sand processing is still not maximized at this time. The purpose of this research is to know whether the sand of Yao Village including iron sand, To know the effect of iron sand usage as fine aggregate on the mortar mixture against compressive strength and against absorption. In this research, the test of compressive strength and mortar absorption. This research uses fine aggregate substitution material is Yao Village sand. Preparation of specimen with Fas 0,40, Yao Village sand composition as substitution of fine aggregate that is 0%, 20%, 40%, 60%, 80% and 100% to the fine aggregate weight. The composition of Sand Yao Village after the most dominant purification was Fe (75.84%) of the total iron ore content, followed by Si, Ti, Ca, Al, and other minor elements, so it was classified as an iron sand. There is a decrease in compressive strength along with the increase of iron sand composition 0%, 20%, 40%, 60%, 80% and 100%. Large decreases in compressive strength of each s 19.20 MPa, 19.00 MPa, 18.60 MPa, 13.00 MPa, 13.00 MPa and 12.36 MPa. absorption of mortar in 20% iron sand substitution and 40% of absorption increased, at 60% composition decreased.

Pulau Morotai merupakan kawasan pengembangan budidaya rumput laut. Namun saat ini terdapat kendala yang dihadapi oleh pembudidaya yaitu penyakit ice-ice dan pengelolaan hasil. Upaya pengelolaan dan pemanfaatan potensi budidaya rumput laut di pulau kecil secara optimal dapat dilakukan melalui pembinaan usaha kecil, menegah dan mikro (UMKM). Tujuan dari pengabdian ini yaitu memberikan pendampingan dalam proses pembudidayaan rumput laut yang baik, sedangkan manfaat yang didapat dari pengabdian ini yaitu diharapkan dapat menghasilkan bibit yang berkelanjutan serta dapat menciptakan lapangan pekerjaan bagi masyarakat pesisir.  Pelaksanaan Pengabdian ini dilakukan di Desa Koloray Kecamatan Morotai Selatan, Kabupaten Pulau Morotai Maluku Utara. Subjek dalam kegiatan ini adalah kelompok  tani Rumput Laut Desa Koloray. Proses pelaksanaan pengabdian ini meliputi: pemetaan potensi lahan budidaya, pemetaaan aspek SDM masyarakat, sosialisasi program, serta pelatihan penguatan kelembagaaan dalam pelaksanaan budidaya rumput laut. Hasil kegiatan ini dilakukan pemetaan lokasi budidaya rumput laut sehingga diperoleh lokasi yang pernah dikakukan penanaman, dengan mempertimbangkan aksebilitas, luasan daerah penanaman dan keterlindungan dari gelombang, selain itu dilakukan pengamatan kualitas perairan diantaranya parameter suhu, salinitas, pH, kecerahan, kedalaman dan dasar perairan yang dinilai cocok sesuai kualifikasi baik. Untuk keberlanjutan dan  keberhasilan dalam usaha maka dilakukan juga penguatan kelembagaan dalam menjalankan sebuah usaha serta melakukan monitoring dan evaluasi. Dengan adanya kegiatan ini masyarakat, terutama kepada kelompok pembudidaya telah mampu menentukan pemelihan lokasi, pemeilihan metode budidaya serta mampu mengatasi masalah utama budidaya rumput laut, dalam hal ini ikan beronang yaitu dengan merubah metode dari patok dasar ke metode rakit jaring apung.

No abstract

The development of land transportation, in this case the highway in Morotai Island Regency, is currently very fast. One of the roads planned for the construction of a new road is the Unipas Morotai Campus Road Section. So far, the construction of new roads in Morotai Island Regency has not been optimally carried out by a survey to test the condition of the subgrade and the strength of the base soil. The purpose of this study was to determine the carrying capacity of the subgrade for the purpose of planning pavement thickness on the Unipas Morotai campus road through direct field testing with laboratory testing. The results showed that the soil types in the 3 sampling locations were loamy soils with high water content in the field between 30-35%. The laboratory CBR value at point 01 is 33%, point 2 is 28% and point 3 is 49%. These results indicate that from the results of laboratory testing, subgrade fulfills the requirements as a subgrade on road pavement where CBR> 5%. The CBR value of the field tested at point 6 test points gave a varied value of 4.64% -6.96%. These results indicate that from the lab test results, subgrade fulfills the requirements as a subgrade on the pavement where CBR> 5% at point 01 , and point 04. Meanwhile, the other 4 points did not meet their CBR values so that special compaction was needed in the field..