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PENGARUH PEMANFAATAN LIMBAH CANGKANG KERANG DAN LIMBAH KERAMIK SEBAGAI SUBSTITUSI AGREGAT HALUS DAN AGREGAT KASAR PADA BETON TERHADAP KUAT TEKAN BETON

EFFECT OF UTILIZATION WASTE SHELLS AND CERAMICS

AS A SUBSTITUTION OF FINE AND COARSE AGGREGATES OF CONCRETE AGAINST CONCRETE COMPRESSIVE STRENGTH

Andi Afdilla Amiruddin

Mahasiswa, Jurusan Teknik Sipil, Politeknik Negeri Samarinda

afdilla@gmail.com

Salma Alwi

Staff Pengajar, Jurusan Teknik Sipil, Politeknik Negeri Samarinda

Salmaalwi@yahoo.com

Daru Purbaningtyas

Staff Pengajar, Jurusan Teknik Sipil, Politeknik Negeri Samarinda

darupurbaningtyas@polnes.ac.id

INTISARI

Limbah cangkang kerang dan keramik merupakan limbah yang jumlahnya cukup banyak dan sering ditemukan di Provinsi Kalimantan Timur khususnya di Kabupaten Kutai Lama.Penelitian ini dilakukan untuk mengetahui pengaruh pemanfaatan limbah berupa cangkang kerang sebagai substitusi sebagian agregat halus dan limbah keramik lantai sebagai substitusi agregat kasar terhadap kuat tekan beton.

Campuran limbah cangkang kerang dengan presentase 5% ditambah limbah keramik dengan presentase yang digunakan masing - masing adalah 13,75%, 27,5%, 41,25%, dan 54%. Pengujian material agregat kasar dan halus yang dilakukan adalah pengujian analisis saringan, kadar air, berat jenis dan penyerapan, bobot isi dan abrasi. Pengujian kuat tekan beton dilakukan pada beton umur 7, 28 dan 35 hari dengan benda uji silinder 10 x 20cm.

Hasil pengujian menunjukkan bahwa substitusi limbah cangkang kerang dan keramik mempengaruhi kekuatan tekan dan nilai slump beton. Terjadi penurunan kekuatan tekan beton campuran limbah cangkang kerang dan keramik sebesar 10,94%, 3,80% 23,60%, dan 25,88% terhadap campuran beton normal. Berdasarkan penelitian ini dapat diketahui bahwa substitusi limbah cangkang kerang sebagai substitusi sebagian agregat halus dan limbah keramik sebagai substitusi agregat kasar dengan proporsi tersebut tidak dapat menaikkan kuat tekan beton.

Kata kunci: Cangkang Kerang, Keramik, Kuat Tekan Beton

ABSTRACT

Shells and ceramic waste is waste that is quite a lot and is often found in the province of East Kalimantan, particularly in Kutai Lama. This research was conducted to determine the effect of the use of waste in the form of shells as a partial substitute fine aggregate and floor ceramic waste as coarse aggregate substitution of compressive strength of concrete.

The mixture of waste shells with a percentage of 5% plus waste ceramics with percentages that used are 13.75%, 27.5%, 41.25% and 54%. Testing of coarse and fine aggregate material taken is testing sieve analysis, moisture content, density and absorption, bulk density and abrasion. Tests performed on concrete compressive strength of concrete ages 7, 28 and 35 days with the test specimen cylinder 10 x 20cm.

The test results showed that the substitution of waste shells and ceramic affect the compressive strength and value of concrete slump. There was a decrease in compressive strength of concrete mixtures with substitution of waste shells and ceramics at 10.94% 3.80% 23.60%, and 25.88% of the normal concrete mix. Based on this research can be seen that the substitution of waste shells as a partial substitution of ceramic waste fine aggregate and coarse aggregate as a substitute with the proportion cannot raise the compressive strength of concrete.

Keyword: Shells Shells, Ceramic, Concrete Compressive Strength

PENGARUH GAYA KEPEMIMPINAN TRANSFORMASIONAL TERHADAP KINERJA PEGAWAI ASSISTEN PEMERINTAHAN DAN KESEJAHATERAAN RAKYAT DI BALAI KOTA SAMARINDA

Siti Nurhasanah

( Staf Pengajar Jurusan Administrasi Bisnis Politeknik Negeri Samarinda)

ABSTRACT

Own human resource management will become a very important part of the management tasks of the organization. Conversely, if the human resources are not managed properly, the effectiveness will not be achieved.This study aims to analyze and prove the influence of transformational leadership style on employee performance on Assistant Government and People's Welfare at Samarinda City Hall. Furthermore, by using Likert scale 1-5 and simple linear analysis the number of respondents in this study amounted to 43 who are employees in Assistant Government and People's Welfare at Samarinda City Hall. The results of this study indicate that the style of transformational leadership significantly influence the performance of employees in the government's assistant and people's welfare in samarinda city hall.

Keywords: Transformational Leadership Style, Employee Performance

ABSTRAK

Pengelolaan sumber daya manusia sendiri akan menjadi bagian yang sangat penting dari tugas manajemen organisasi. sebaliknya, jika sumber daya manusia tidak dikelola dengan baik maka efektivitas tidak akan tercapai. Penelitian ini bertujuan untuk menganalisis dan membuktikan pengaruh gaya kepemimpinan transformasional terhadap kinerja pegawai pada Assisten Pemerintahan dan Kesejahteraan Rakyat di Balai Kota Samarinda. Selanjutnya dengan menggunakan skala likert 1-5 serta analisis linier sederhana jumlah responden dalam penelitian ini berjumlah 43 yang merupakan pegawai pada Assisten Pemerintahan dan Kesejahteraan Rakyat di Balai Kota Samarinda. Hasil penelitian ini menunjukkan bahwa gaya kepemimpinan transformasional berpengaruh secara signifikan terhadap kinerja pegawai pada assisten pemerintahan dan kesejahteraan rakyat di balai kota samarinda.

Kata kunci: Gaya Kepemimpinan Transformasional, Kinerja Pegawai

THE CORRELATION BETWEEN READING HABITS AND READING COMPREHENSION OF “DIPLOMA-IV” ACCOUNTING MANAGERIAL STUDY PROGRAM STUDENTS OF SAMARINDA STATE POLYTECHNIC

Heldina Pristanti

( Staf Pengajar Jurusan Administrasi Bisnis Politeknik Negeri Samarinda)

ABSTRACT

Reading habit is considered as a continuous process that needs some willingness and great effort for the students to improve their reading ability. Concerning with this the researcher has attracted to investigate whether there is a significant relationship between the students’ reading habit and their reading comprehension. There are three major issues covered in this research. The first one is to investigate the students’ reading habit. Second, this research is also to investigate the students’ reading comprehension. Third, this present research also reveals the correlation between the students’ reading habit and reading comprehension. The mixed method was applied in this research.There were three instruments utilized here: the students’ reading habit questionnaire and the students’ TOEFL reading comprehension score. The research was conducted in Samarinda State polytechnic. To validate the 37 Indonesian of reading habit questionnaire was given to 22 students of “Diploma-IV” students randomly. The result of the try-out questionnaire shows that the Cronbach’s Alpha coefficient is 0.961 which means that this scale is valid and reliable to be used in collecting the data. The real questionnaire was given to 217 “Diploma-IV” Accounting Managerial Study Program students’ of Samarinda State Polytechnic. The findings revealed that the students like reading in their leisure time and reading is indispensable part of life. They like borrowing books from the library and reading academic/scientific book. The students also stated that reading has good effects such as it positively affects their success during the exam time, it can enhance their mental capacity, and it is a channel for gaining a real world knowledge. Pearson Product Moment Correlation shows significantly positive correlation between reading habit and reading comprehension (measured by TOEFL score) (r = 0.087, p >0.05). This research was only investigated about the students’ reading habit and reading comprehension and also their significant relationship. It would be more interesting and useful if there will be some future researcher that can investigate the factor and the dominant factor that influence the students’ reading habit and reading comprehension. And the implication of this research is the students need to improve their reading habit especially reading academic book in spite of reading comic, novel, magazine or any other kind of book.

Keywords: Reading Habit, Reading Comprehension

PENGARUH PEMANFAATAN LIMBAH CANGKANG KERANG DAN LIMBAH KERAMIK SEBAGAI SUBSTITUSI AGREGAT HALUS DAN AGREGAT KASAR PADA BETON TERHADAP KUAT TEKAN BETON

AS A SUBSTITUTION OF FINE AND COARSE AGGREGATES OF CONCRETE AGAINST CONCRETE COMPRESSIVE STRENGTH

PENGARUH GAYA KEPEMIMPINAN TRANSFORMASIONAL TERHADAP KINERJA PEGAWAI ASSISTEN PEMERINTAHAN DAN KESEJAHATERAAN RAKYAT DI BALAI KOTA SAMARINDA

THE CORRELATION BETWEEN READING HABITS AND READING COMPREHENSION OF “DIPLOMA-IV” ACCOUNTING MANAGERIAL STUDY PROGRAM STUDENTS OF SAMARINDA STATE POLYTECHNIC

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INFO TERBITAN (ACAK)

Pengantar Redaksi MEDIA PERSPEKTIF VOL. 10 Nomor 2, DESEMBER 2010

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