Beton merupakan salah satu material yang paling banyak digunakan untuk infrastruktur, tetapi menggunakan semen sebagai bahan dasar. Proses produksi semen akan menghasilkan gas CO 2 yang dapat meningkatkan pemanasan global. Untuk mengatasi masalah tersebut, sudah seharusnya mencari bahan pengganti sebagai bahan pengikat untuk membuat beton. Bahan pengganti semen yang mengandung silika dan alumina akan berperan penting untuk mengendalikan masalah tersebut . Fly ash merupakan limbah dari pembakaran batu bara yang memiliki sifat pozzolanic. Studi literatur ini bertujuan untuk mengetahui pengaruh rasio alkali Na 2 SiO 3 /NaOH, molaritas NaOH, suhu dan waktu curing, umur beton pada beton geopolimer dengan bahan dasar 100% fly ash terhadap nilai kuat tekan. Rasio alkali Na 2 SiO 3 /NaOH sebesar 2,5 yang menghasilkan nilai kuat tekan yang optimal, sedangkan semakin besar molaritas NaOH akan menghasilkan kekuatan yang meningkat tetapi akan mempercepat ikat awal.K uat tekan beton geopolimer yang di curing akan semakin meningkat seiring dengan bertambahnya suhu curing hingga 80 0 C, setelah melewati 80 0 C persentasekenaikan kuat tekan beton pada penelitian ini mengalami penurunan. Selain itu, waktu curing efektif diperoleh pada waktu 24 jam .Kekuatan tekan beton juga semakin meningkat seiring dengan bertambahnya umur beton, peningkatan efektif pada umur beton 7 hari.

http://ejournal.ust.ac.id/index.php/JRKMS/article/download/858/pdf

Review Faktor - Faktor yang Mempengaruhi Karakteristik Kuat Tekan Beton Geopolimer

/pdf/strength-characteristics-of-geopolymer-concrete-floor-tiles-3lfbn4st0j.pdf

Strength Characteristics of Geopolymer Concrete Floor Tiles on Various Mix Proportions

Introduction of the alternative materials for complete replacement of cement in ordinary concrete will play an important role to control greenhouse gas and its effect. The 100% replacement of binder with fly ash (in integration with potassium hydroxide (koh) and potassium silicate (k2sio3) solutions) in concrete gives a significant alternative to conventional cement concrete. This paper focuses on the effect of alkaline solutions koh and k2sio3 on strength properties of fly ash based geo polymer concrete (fgpc); compared the strength at different molarities of alkaline activator koh at different curing temperature. Fly ash based geo polymer concrete was produced from low calcium fly ash, triggered by addition of koh and k2sio3 solution and by assimilation of superplasticizer for suitable workability. The molarities of potassium hydroxide as 8m, 10m and 12m molarities were used at various curing temperatures such as 60°c, 70 °c and 80°c. Results showed that for given proportion to get maximum compressive strength the optimum molarity of alkaline solution is 12m and optimum curing temperature is 70 °c.

https://iopscience.iop.org/article/10.1088/1757-899X/263/3/032032/pdf

Study on the compressive strength of fly ash based geo polymer concrete

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Study on the compressive strength of fly ash based geo polymer concrete