PERILAKU KUAT TEKAN MORTAR SEMEN PASANGAN DENGAN ABU SABUT CANGKANG SAWIT YANG DIOVEN DAN TIDAK DIOVEN

The order of mortar cement which used to bond individual units of masonry and to cover  masonry wall keeps increasing. Meanwhile, the natural source of cement is limited. This article is the report of the research of the behaviour of mortar compression strength which used palm oil fibrous shell ash as the additive of cement. The ash used in this research was strained by strainer number 200. The ash discerned to the difference between the oven and unoven one. The proportions of cement and sand that used were 1:3 dan 1:5. The percentages of each of the ash were varied by the increment 2,5% between 0 to 10 %. 200 mortar 50 mm cubes distributed to each cell of samples were used according to ASTM C109/C109M-02. The concistency and the workability of the mortar was done by flow table test according to ASTM C-270. The mortar cubes were cured in water since the mall were gotten off. The compession test was held according to SNI 03-6825-2002 at 28 days of the cubes age. The results of analysis of variance (anova) of the mortar strength which used ovened ash were significant for the strength of the proportion 1:5 and unsignificant for the strength of 1:3 of the proportion. The strength of the significant one was inceased 0.66% at the mortar which used 10% ash. The results of the anova of the mortar strength with unovened ash were significant for the mortarproportion  1:3 and unsignificant for the strength of 1:5 mortar proportion. The strength of the significant one was 1,54% higher at mortar with 2,5% ash compared to the one without the ash

PERILAKU KUAT TEKAN MORTAR SEMEN PASANGAN DENGAN ABU SABUT CANGKANG SAWIT YANG DIOVEN DAN TIDAK DIOVEN

Mortar semen pasangan sebagai perekat unit dinding batu dan plesteran dinding terus meningkat pemakaiannya. Sementara semen adalah sumber daya alam terbatas keberadaannya. Tulisan ini merupakan hasil penelitian terhadap perilaku kuat tekan mortar yang menggunakan abu sabut cangkang sawit (ACS) sebagai bahan tambah semen. ACS yang digunakan adalah ACS lolos saringan nomor 200 dan dibedakan atas ACS yang dioven dan tidak dioven. Mortar yang diteliti memiliki perbandingan semen dan pasir 1:3 dan 1:5. Variasi persentase ACS yang dibuat berada antara 0 sampai 10 dengan kenaikan 2,5%. 200 kubus mortar berdimensi 50 mm dibuat dan didistribusikan kepada setiap perlakuan untuk menjawab tujuan penelitian ini. Ukuran benda uji mengacu pada ASTM C109/C109M-02. Konsistensi dan workability mortar diperoleh dengan uji meja sebar yang mengacu pada ASTM C-270. Benda uji dicetak dan direndam di dalam air bersih sejak cetakan dibuka pada umur 24 jam. Pengujian kuat tekan mortar dilakukan sesuai dengan SNI 03-6825-2002 ketika mortar berumur 28 hari. Hasil uji analisa varian (anava) untuk kuat tekan mortar ACS yang dioven signifikan untuk kuat tekan mortar 1:5 dan tidak signifikan untuk kuat tekan mortar 1:3. Peningkatan kuat tekan mortar 1:5 dengan ACS dioven meningkat sebesar 0,66% pada persentase penambahan ACS 10%. Sebaliknya, hasil uji anava untuk kuat tekan mortar dengan ACS tidak dioven signifikan untuk untuk kuat tekan mortar 1:3 dan tidak signifikan untuk kuat tekan mortar 1:5. Peningkatan 1,54% kuat tekan mortar 1:3 ACS tidak dioven terjadi pada 2,5% penambahan ACS dibandingkan dengan mortar tanpa ACS

BALIQ: INDIGENOUS CONFLICT RESOLUTION MECHANISM AMONG THE SILTE PEOPLE: THE CASE OF SILTI WOREDA, KIBET TOWN

The different ethnic groups in Ethiopia have developed their own indigenous mechanism to deal with conflicts. The Silte of southern Ethiopia is among those ethnic groups with their own conflict resolution mechanism. The main purpose of this study is to explore the indigenous institutions of conflict resolution among the Silte people of southern Ethiopia. This study has employed a qualitative research to meet the stated objectives of the study. To achieve the above objectives, the study collected primary data from different informants in Silte Woreda by employing such qualitative data collection techniques as an interview, focus group discussions and observation. The secondary data sources were obtained from published and unpublished government documents; such as books and magazine and. The finding of this research reveals that the indigenous conflict resolution institution is one of the ways of resolving conflict in the study area. The study also came up with the major causes of conflict in the study area and the indigenous means to resolve them through the Baliq conflict resolution institution. The major causes that drive people of the study area in to conflict are family related conflicts, land, theft, marriage and insult. This research also exposes the criterion for the selection of an elder in conflict resolution institution and the study areas indigenous rules of law enforcement. It also came up with the relationship that existed between ICRM and the formal court system in resolving conflicts and keeping the societies peace and security. Hence, Baliq plays a core role in resolving conflicts