Self-Compacting Geopolymer Concrete (Scgc) Mutu Tinggi Berbasis High-Calcium Fly Ash Dengan Metode Pencampuran Kering

Cahyani, Arwinda Aribah (2022) Self-Compacting Geopolymer Concrete (Scgc) Mutu Tinggi Berbasis High-Calcium Fly Ash Dengan Metode Pencampuran Kering. Diploma thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Self-Compacting Concrete (SCC) merupakan beton yang dapat mengalir dan dapat memadat dengan sempurna tanpa bantuan alat penggetar (vibrator). SCC telah dikembangkan pada industri skala besar dengan menggunakan semen portland. Namun, penggunaan semen portland memiliki dampak buruk terhadap lingkungan. Self-Compacting Geopolymer Concrete (SCGC) dikembangkan sebagai material konstruksi alternatif untuk menggantikan penggunaan PC pada beton SCC. Beton geopolimer umumnya memanfaatkan 2 tipe fly ash yaitu tipe F (low calcium fly ash) dan tipe C (high calcium fly ash). Kandungan CaO yang tinggi pada fly ash tipe C berpotensi menghasilkan beton mutu tinggi namun, mengakibatkan beton memiliki setting time yang cepat sehingga workability rendah. Penggunaan admixture (superplasticizer) merupakan salah satu solusi permasalahan beton geopolimer dalam menjaga kualitas dan kelecakan (workability) beton. Penelitian ini berfokus pada penentuan kadar optimum superplasticizer terhadap workability dan kuat tekan SCGC berbasis high-calcium fly ash dengan metode kering. Metode pencampuran kering digunakan untuk meningkatkan performa dan workability. Penelitian ini menggunakan superplasticizer jenis sika visconcrete 3115N dan Consol P100 ESP berbahan dasar polycarboxilate dengan kadar 3%, 5%, dan 7%, menggunakan molaritas larutan NaOH 14M dengan rasio Na2SiO3.5H2O dan NaOH 1:1, agregat kasar menggunakan ukuran 20 mm, persen agregat gabungan 60:40. Pengujian SCGC meliputi slump flow, L-box, dan V-funnel dilakukan untuk mengetahui tingkat workability beton SCGC. Selain itu, pengujian kuat tekan dilakukan untuk mengetahui kuat tekan beton apakah memenuhi persyaratan beton mutu tinggi. Hasil penelitian menunjukkan bahwa superplasticizer dapat memperbaiki workability pada SCGC. Kadar optimum yang didapatkan yaitu dengan superplasticizer sika visconcrete 3115N kadar 5%. Kuat tekan tertinggi saat 28 hari didapatkan 51.2 Mpa serta nilai slump flow 570 mm, v-funnel 20 detik, dan L-Box 0,61 sedangkan workability terbaik yaitu dengan superplasticizer sika visconcrete 3115N kadar 7%. Nilai slump flow 645 mm, v-funnel 13 detik dan L-box 0,81. Hal tersebut mengindikasikan bahwa superplasticizer sika visconcrete 3115N lebih efektif untuk memperbaiki workability daripada Consol P100 ESP.
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Self-Compacting Concrete (SCC) is a concrete that can flow and can solidify perfectly without the help of a vibrator. SCC has been developed on a large-scale industry using portland cement. However, the use of portland cement has a bad impact on the environment. Self- Compacting Geopolymer Concrete (SCGC) was developed as an alternative construction material to replace the use of PC in SCC concrete. Geopolymer concrete generally utilizes 2 types of fly ash, namely type F (low calcium fly ash) and type C (high calcium fly ash). The high CaO content in type C fly ash has the potential to produce high quality concrete however, resulting in concrete having a fast setting time so that workability is low. The use of admixture (superplasticizer) is one of the solutions to the problem of geopolymer concrete in maintaining the quality and workability of concrete. This study focuses on determining the optimum level of superplasticizer against the workability and compressive strength of SCGC based on high-calcium fly ash by the dry method. The dry mixing method is used to improve performance and workability. This study used a sika visconcrete 3115N type superplasticizer and Consol P100 ESP based on polycarboxilate with levels of 3%, 5%, and 7%, using a molarity of 14M NaOH solution with a ratio of Na2SiO3.5H2O and NaOH 1: 1, coarse aggregate using a size of 20 mm, a combined aggregate percent of 60:40. SCGC testing including slump flow, L-box, and V-funnel was carried out to determine the level of workability of SCGC concrete. In addition, compressive strength testing is carried out to find out the compressive strength of concrete whether it meets the requirements of high-quality concrete. The results showed that superplasticizers can improve workability in SCGC. The optimum level obtained is with a superplasticizer sika visconcrete 3115N 5% content. The highest compressive strength for 28 days was obtained at 51.2 Mpa and the slump flow value was 570 mm, v-funnel 20 seconds, and L-Box 0.61 while the best workability was with a 3115N sika visconcrete superplasticizer with a rate of 7%. The slump flow value is 640 mm, the v- funnel is 13 seconds and the L-box is 0.81. This indicates that the sika visconcrete 3115N superplasticizer is more effective for improving workability than the Consol P100 ESP.

Item Type:	Thesis (Diploma)
Additional Information:	RSIS 620.136 Cah s-1 2022
Uncontrolled Keywords:	Self-Compacting Geopolymer Concrete (SCGC), Workability, Mutu Beton, Fas, Superplasticizer, Metode Kering, High-Calcium Fly Ash. Self-Compacting Geopolymer Concrete (SCGC), Workability, Compressive Strength, fas, Superplasticizer, Dry Mixing Method, High-Calcium Fly Ash.
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Divisions:	Faculty of Vocational > 22301-Civil Infrastructure Engineering (D4)
Depositing User:	Mr. Marsudiyana -
Date Deposited:	13 Jul 2026 04:03
Last Modified:	13 Jul 2026 04:03
URI:	http://repository.its.ac.id/id/eprint/134778

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