Pemanfaatan Tetes Tebu Sebagai Bahan Tambah (Admixture) Pada Campuran Mortar

Cornelly, I'il Aley Dhea (2025) Pemanfaatan Tetes Tebu Sebagai Bahan Tambah (Admixture) Pada Campuran Mortar. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh penambahan tetes tebu terhadap karakteristik mortar, meliputi nilai flow diameter, waktu ikat pasta semen, kuat tekan mortar, dan suhu hidrasi mortar, serta membandingkan dengan mortar yang menggunakan superplasticizer dan mortar tanpa bahan tambah (kontrol). Variasi tetes tebu yang digunakan adalah 0%, 0,25%, 0,5%, 0,75%, dan 1% dari berat semen, serta superplasticizer tipe G sebanyak 1% dari berat semen. Campuran mortar menggunakan jenis semen OPC (Ordinary Portland Cement) dan PCC (Portland Composite Cement) dengan faktor air semen (FAS) 0,4 dan 0,5. Uji kuat tekan dilakukan pada umur 7, 28, dan 56 hari, sementara uji suhu hidrasi dilakukan dari mortar segar hingga 72 jam setelah pencampuran. Hasil penelitian menunjukkan bahwa penambahan tetes tebu mampu meningkatkan nilai flow diameter mortar dari 100 mm (kontrol) menjadi maksimum 155 mm pada variasi mortar PCC FAS 0,5 dengan dosis tetes tebu 1%. Nilai waktu ikat mengalami kecenderungan akselerator pada dosis rendah (0,25%-0,5%) dan retarder pada dosis tinggi (0,75-1%). Pada pengujian kuat tekan, variasi mortar OPC FAS 0,5 dengan penambahan 0,5% tetes tebu menghasilkan kuat tekan maksimum sebesar 41,24 MPa pada umur 56 hari, lebih tinggi dibandingkan mortar dengan superplasticizer (40,77 MPa) maupun mortar kontrol (33,96 MPa). Selain itu, penambahan tetes tebu mampu menurunkan suhu puncak hidrasi hingga 6°C dibandingkan variasi tanpa bahan tambah (kontrol), menunjukkan potensi efektivitasnya sebagai retarder alami. Secara keseluruhan, dapat disimpulkan bahwa tetes tebu berpotensi sebagai bahan tambah alternatif yang mampu meningkatkan workability, mengatur waktu ikat, memperbaiki kuat tekan mortar, serta menurunkan suhu hidrasi. Secara aspek ekonomi dan lingkungan, penggunaan tetes tebu berpotensi sebagai bahan tambah alternatif dan menjadi bahan konstruksi bernilai yang mendukung pengembangan material konstruksi berkelanjutan di Indonesia.
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This study aims to investigate the effect of sugarcane molasses as an admixture on the characteristics of mortar, including flow diameter, cement paste setting time, mortar compressive strength, and hydration temperature. The results were compared to mortars containing superplasticizer and control specimens without any admixture. The sugarcane molasses dosage varied from 0%, 0,25%, 0,5%, 0,75%, to 1% by cement weight, while a Type G superplasticizer was used at 1%. The mortar mixtures employed Ordinary Portland Cement (OPC) and Portland Composite Cement (PCC) with water-to-cement ratios (w/c) of 0,4 and 0,5. Compressive strength tests were conducted at 7, 28, and 56 days, while hydration temperature measurements were taken for up to 72 hours after mixing. The results indicated that the addition of molasses increased the flow diameter from 100 mm (control) to a maximum of 155 mm in the PCC w/c 0.5 mixture with 1% molasses. The setting time showed an accelerating tendency at lower doses (0,25%–0,5%) and a retarding effect at higher doses (0,75%–1%). The highest compressive strength was achieved by the OPC w/c 0,5 mixture with 0,5% molasses, reaching 41,24 MPa at 56 days, outperforming both the superplasticizer (40,77 MPa) and the control (33,96 MPa). Moreover, the use of molasses reduced the peak hydration temperature by 6°C compared to the control mixture, indicating its potential as a natural retarder. In conclusion, sugarcane molasses shows promise as an alternative admixture that enhances mortar workability, regulates setting time, improves compressive strength, and reduces hydration temperature. From both economic and environmental perspectives, its application contributes to the development of sustainable construction materials in Indonesia.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Kuat Tekan, Suhu Hidrasi, Tetes Tebu, Waktu Ikat, Compressive Strength, Flow diameter, Hydration Temperature, Sugarcane Molasses, Setting time
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA681 Concrete construction
Divisions:	Faculty of Civil Engineering and Planning > Civil Engineering > 22201-(S1) Undergraduate Thesis
Depositing User:	I'il Aley Dhea Cornelly
Date Deposited:	04 Aug 2025 09:50
Last Modified:	04 Aug 2025 09:50
URI:	http://repository.its.ac.id/id/eprint/124397

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