Ayu Risnawati
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Studi Optimasi Pembuatan Nanoaspal Karet dari Asbuton Riny Yolandha Parapat; Ayu Risnawati; Marsya Imara Sabrilia; Indra Noer Hamdhan; Imam Aschuri
RekaRacana: Jurnal Teknil Sipil Vol 8, No 3: November 2022
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/rekaracana.v8i3.197

Abstract

ABSTRAKJumlah mobil yang terus meningkat memberi dampak tidak hanya pada kondisi jalan, tetapi juga pada penumpukan limbah ban. Penyebab kerusakan jalan menuntut penggunaan material untuk perkerasan jalan dengan kualitas yang lebih tinggi. Pemanfaatan Crumb Rubber (CR) dari ban mobil menjadi bahan aditif campuran aspal adalah solusi terbaik untuk kedua masalah tersebut. Para peneliti telah melaporkan bahwa penambahan CR dan nanopartikel dapat meningkatkan kualitas aspal jalan secara signifikan. Tujuan dari penelitian ini adalah mendapatkan komposisi optimum nanoaspal karet untuk meningkatkan mutu aspal Asbuton. Komposisi campuran aspal hasil ekstraksi, CR dan nanopartikel kemudian dioptimasi untuk mendapatkan kualitas nanoaspal karet yang memenuhi standar dengan menggunakan metode Central Composite dan Response Surface Method. Response yang diukur adalah Penetrasi, Daktilitas, Kelarutan dan Densitas dari nanoaspal karet. Hasil optimasi menunjukan bahwa pada komposisi 3,682%NP; 4,694%CR; dan pada ukuran CR sebesar 88,5 nm; keempat parameter uji di atas terpenuhi.Kata kunci: asbuton, crumb rubber, nanoaspal karet, nanopartikel ABSTRACT The increasing number of cars has an impact not only on road conditions, but also on the accumulation of waste tires. The cause of road damage demands the use of materials for road pavement with higher quality. Utilization of Crumb Rubber (CR) from car tires as an additive to asphalt mixture is the best solution for both problems. Researchers have reported that the addition of CR and nanoparticles can significantly improve the quality of road asphalt. The purpose of this research is to obtain the optimum composition of rubber nano-asphalt to improve the quality of Asbuton asphalt. The composition of asphalt, CR and nanoparticles is then optimized using the Central Composite and Response Surface Method. Responses measured were penetration, ductility, solubility and density of rubber nanoasphalt. The optimization results show that at a composition of 3.682%NP, 4.694%CR, and CR size of 88.5 nm, the test parameters above are fulfilled.Keywords: asbuton, crumb rumbber, rubber nanoasphalt, nanoparticles
ANALYSIS OF THE IMPLEMENTATION OF DIFFERENTIATED INSTRUCTION IN MATHEMATICS LEARNING AT SDN 104186 TANJUNG SELAMAT Jamilah Rambe; Ayu Risnawati; Laura Febriyanti Tambunan; Sezi Oktavia Simarmata; Karyenti Merintan Sani Lahagu; Firman Pangaribuan; Hardi Tambunan
Afore : Jurnal Pendidikan Matematika Vol 4 No 1 (2025): AFORE : Jurnal Pendidikan Matematika
Publisher : Universitas Nias Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57094/afore.v4i1.2556

Abstract

The purpose of this study is to describe the implementation process of differentiated instruction and the factors that affect the implementation of Mathematics learning using differentiated instruction in the 4th grade. This qualitative research uses descriptive data such as written texts, statements, and behaviors observed in the teaching and learning process. The study was conducted in the odd semester of 2024 at SDN 104186 Tanjung Selamat. The research informants were the teacher and the 4th-grade students. The differentiated instruction in Mathematics implemented in the 4th grade at SDN 104186 Tanjung Selamat had a positive impact on content, process, and product differentiation. Furthermore, the factors influencing the successful implementation of differentiated instruction in 4th-grade Mathematics included effective teaching strategies and active student involvement.