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All Journal REKA RACANA KURVATEK
Billy Arrowrichta
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Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Education Electrical & Electronics Engineering Engineering Social Sciences

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Pengaruh Bahan Tambah Gula Pasir Terhadap Waktu Pengikatan dan Kuat Tekan Retno Trimurtiningrum; Bantot Sutriono; Billy Arrowrichta; Hiasintus Bertus Watu; Misrawi Misrawi
RekaRacana: Jurnal Teknil Sipil Vol 6, No 1: Maret 2020
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/rekaracana.v6i1.1

Abstract

ABSTRAKDalam pelaksanaan pembangunan konstruksi beton, seringkali ditemui beberapa kendala, seperti lokasi batching plan yang berbeda dengan lokasi proyek serta tingginya temperatur saat pengecoran, sehingga dapat mempercepat waktu pengikatan beton. Untuk mencegah waktu pengikatan lebih awal, diperlukan bahan tambah kimia yang dapat memperlambat waktu pengikatan yaitu retarder. Akan tetapi, bahan tambah kimia mempunyai harga yang relatif tinggi. Oleh karena itu, pada penelitian ini digunakan gula sebagai bahan tambah alternatif, karena gula merupakan salah satu penyusun dalam komposisi retarder serta mempunyai harga yang cukup ekonomis. Persentase gula pasir yang digunakan bervariasi, yaitu 0% (sebagai benda uji kontrol); 0,03%; 0,05% dan 0,1%. Hasil pengujian menunjukkan waktu pengikatan terlama diperoleh campuran dengan persentase gula sebanyak 0,1% dengan waktu ikat awal 157 menit dan waktu ikat akhir 258 menit, sedangkan hasil pengujian kuat tekan maksimum sebesar 225,38 kg/cm2 diperoleh campuran dengan persentase gula sebanyak 0,05%.Kata kunci: waktu pengikatan, gula, kuat tekan, retarderABSTRACTIn concrete construction process, several obstacles are often to be encountered such as the location of the batching plan that is different from the project location, as well as the high temperature while casting causes the acceleration of concrete setting time. To prevent earlier setting time, chemical admixture which can slow down the setting time is needed, namely retarders. However, chemical admixtures have relatively high prices. Therefore, in this study, sugar was used as an alternative ingredient, because sugar is one of the retarder’s composition and has relatively economical price. The percentages of sugar were varied, which are 0% (as a control specimen); 0.03%; 0.05% and 0.1%. The test results showed that the longest setting time is obtained by mixture with 0.1% of sugar, with the initial setting time 157 minutes and the final setting time 258 minutes, while the maximum compressive strength test results are 225,38 kg/cm2 obtained by a mixture with 0,05% of sugar.Keywords: setting time, sugar, compressive strength, retarder
Pengaruh Penambahan Gula Pasir terhadap Waktu Ikat Awal Pasta Semen dan Mortar Retno Trimurtiningrum; Bantot Sutriono; Billy Arrowrichta; Hiasintus Bertus Watu
KURVATEK Vol 4 No 2 (2019): November 2019
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v4i2.1564

Abstract

In concrete construction process, it is often happened that the location of batching plan is different from the project location, so it takes time in its material transport. To prevent the concrete material from early setting time before casting, it is necessary to add chemical admixture to slow the setting time, which is retarder. Generally, chemical admixtures including retarder have relatively expensive price. Therefore, this study used alternative material such as sugar, because sugar is one of retarder’s consituent material that has relatively low price and also easy to obtain. The percentage of sugar in this research were 0% (as a control specimen); 0.03%; 0.05% and 0.1%. The setting time test used the Vicat neddle apparatus for cement paste and penetration resistance tools for mortar. The setting time result shows that sugar can delay the initial setting time on cement paste or mortar specimens. The longest initial setting time was obtained by a mixture that has been added 0,1% of sugar which is 157,69 minutes for cement paste test and 250 minutes for mortar specimen. Keyword : setting time, sugar, cement paste, mortar.
Co-Authors Bantot Sutriono Hiasintus Bertus Watu Misrawi Misrawi Retno Trimurtiningrum