ANALISIS SUBTITUSI BATU LATERIT DAN PENAMBAHAN PLASTIK POLYPROPYLENE TERHADAP CAMPURAN ASPHALT CONCRETE-WEARING COURSE (AC-WC) --

ABSTRAK
Adanya pemindahan Ibu Kota Negara Indonesia ke Provinsi Kalimantan Timur
meningkatkan penggunaan lahan karena pembangunan gedung, jalan, dan
infrastruktur lain yang menyebabkan tingginya biaya konstruksi di Kalimantan
Timur. Dalam pembangunan jalan raya, biaya konstruksi perkerasan jalan
beraspal relatif lebih murah. Untuk mengurangi biaya konstruksi, perkerasan jalan
beraspal dapat diupayakan dengan cara mensubtitusikan material lokal dengan
bahan campuran beraspal yaitu agregat kasar dengan batu laterit. Selain dapat
mengurangi biaya konstruksi, perkerasan aspal juga dapat meminimalisir
kerusakan pada jalan dengan cara menambahkan bahan tambah (additive) pada
aspal untuk merubah sifat-sifat campuran beraspal yaitu dengan menambahkan
karung plastik sebagai bahan tambah pada aspal. Penelitian ini dilakukan dengan
merancang komposisi campuran beraspal, menetapkan kadar karung plastik sebesar
5% terhadap berat aspal, mencari kadar batu laterit maksimum dengan variasi 37.5%,
50%, 62.5%, 75%, dan 87.5%. Pencampuran plastik menggunakan metode dry
process, selanjutnya menguji Durabilitas aspal pada perendaman 24 jam serta
menguji Persentage Refusall Density (PRD) pada campuran AC-WC. Berdasarkan
hasil pengujian didapatkan nilai kadar aspal optimum sebesar 6.20% dengan nilai
stabilitas = 1407 kg, flow = 3,6 mm, VIM = 3,6%, VMA = 16,1%, VFA = 78%,
dan MQ = 400 kg/mm dan Density = 2,37 gr/cc. Sedangkan kadar laterit diperoleh
sebesar 75% dengan nilai stabilitas = 1359 kg, flow = 3,8 mm, VIM = 4,7%,
VMA = 17%, VFA = 72,5%, dan MQ = 356 kg/mm. Nilai stabilitas Marshall sisa
didapatkan sebesar 93,97% serta untuk metode Persentage Refusal Density (PRD)
didapatkan density = 2,39 gr/cc dan VIM = 2,51%, Dengan penambahan karung
plastik dapat meningkatkan nilai stabilitas dan durabilitas pada campuran AC-
WC.
Kata Kunci: AC-WC, Plastik Polypropylene, Stabilitas, Batu Laterit, Persentage
Refusal Density (PRD)
ABSTRACT
The transfer of the Indonesian National Capital to East Kalimantan
Province increased land use due to the construction of buildings, roads and other
infrastructure which led to high construction costs in East Kalimantan. In highway
construction, asphalt pavement construction costs are relatively cheaper. To
reduce construction costs, asphalt pavements can be attempted by substituting
local materials with asphalt mixtures, namely coarse aggregate with laterite stone.
In addition to reducing construction costs, asphalt pavements can also minimize
road damage by adding additives to asphalt to change the properties of the asphalt
mixture by adding plastic bags as additives to asphalt. This research was
conducted by designing the composition of the asphalt mixture, determining the
content of plastic sacks at 5% by weight of asphalt, looking for the maximum
laterite stone content with variations of 37.5%, 50%, 62.5%, 75% and 87.5%.
Mixing plastics using the dry process method, then testing the durability of the
asphalt in 24-hour immersion and testing the Percentage Refusall Density (PRD)
on the AC-WC mixture. Based on the test results, the optimum asphalt content
value was 6.20% with a stability value of 1407 kg, flow = 3.6 mm, VIM = 3.6%,
VMA = 16.1%, VFA = 78%, and MQ = 400. kg/mm and Density = 2.37 gr/cc.
While the laterite content was obtained at 75% with a stability value = 1359 kg,
flow = 3.8 mm, VIM = 4.7%, VMA = 17%, VFA = 72.5%, and MQ = 356
kg/mm. The residual stability value obtained by Marshall was 93.97% and for the
Percentage Refusal Density (PRD) method, density = 2.39 gr/cc and VIM =
2.51%, with the addition of plastic bags can increase the value of stability and
durability in the mixture AC- WC.
Key words: AC-WC, Plastic Polypropylene, Laterite Stone, Stability, Persentage
Refusal Density (PRD)