The Effect of Temperature Curing on Geopolymer Concrete

Ekaputri, Januarti Jaya; Priyanka, Nur Fadlilah

doi:10.1051/matecconf/20179701005

Cited by 22 publications

(17 citation statements)

References 7 publications

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“…Actually, there are a great agreement that degree of heating plays an important role in accelerating strength [22], that fact was robustly confirmed by series of research contributions through the literature [23]. In general sense, heating changes the formation of the crystals of the resulted Geopolymers gel which lead to many mechanical properties of Geopolymers to be enhanced [24], the most interesting enhanced mechanical properties comprise compressive strength [25] and even tensile strength [26], [27]. It was clearly noticed that soil -Geopolymers applications are a current issue [28] and this dictates another efforts to improve the knowledge about this effect of heating temperature to paralyze the good experience that was acquired in Geopolymers mortar and concrete and that what is aimed throughout this paper.…”

Section: Introductionmentioning

confidence: 87%

Effects of Temperature in Different Initial Duration Time for Soft Clay Stabilized by Fly Ash Based Geopolymer

2018

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When soft clay soils are included in engineering projects, it’s stabilized usually with some kinds of admixtures named as stabilizers. The common stabilizers that highly practiced are OPC, lime, high calcium fly ash (FA), etc. Each one of these stabilizers has its shortcomings. Geopolymers are the product of alkali activated aluminosilicate sources that excelled as an alternative to ordinary binders due to its sustainability, low cost and good mechanical properties. This study investigates the effects of some key elements like liquid over fly ash ratio (Liq/FA), initial duration curing time (D) and its temperature to soil – FA based Geopolymers samples characterized by its unconfined compressive strength testing (UCS), volumetric measurements, scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-Ray diffraction (XRD). The Liq/FA taken as 2.71, 3.167, 3.8 and 4.75 respectively and the duration time taken were 1, 6, 18 and 24 hrs. respectively. The tests results showed that the maximum peak strength gain when Liq/FA is 3.8 at 90 oC with 24 hrs. D. It was observed that Young’s Modulus increased with increasing curing temperature for certain D. Volumetric strain increased by increasing D and its temperature. SEM and XRD analyses confirmed the Geopolymers gels formation for a selective precursor while EDX analyses showed that silicon over aluminium ratio is 1.38 for selective spectrum within the gel to the same mixture.

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Section: Introductionmentioning

confidence: 87%

Effects of Temperature in Different Initial Duration Time for Soft Clay Stabilized by Fly Ash Based Geopolymer

2018

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“…The specifications for fly ash can be found in ASTM C618 -19 [9]. Researches on geopolymers mostly were used of class F fly ash [10]. Fly ash supplied from Suralaya, Banten, Indonesia.…”

Section: Methodsmentioning

confidence: 99%

The Effect of Steam Curing Method to the Compressive Strength of Geopolymer Concrete With Different Molarity

Setiawan

Soegiarso²,

Hardjasaputra³

2023

Jurnal Teknologi

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Cement, an important part of concrete mixture, determine the mechanical properties of concrete. The mixture of cement and water will stimulate the hydration reaction which will produce CSH gel and heat of hydration. The high level of CO2 pollution produced in the cement manufacturing process requires alternative efforts to replace cement with other pozzolanic materials. One of the materials that can replace the role of cement in concrete mixture is fly ash. The replacement of cement 100% with fly ash will produce a geopolymer concrete, which requires an alkaline solution as a reagent from fly ash. This research was conducted with the aim to explore the effect of steam curing to the compressive strength of geopolymer concrete with different molarities. As the test object in this study was a geopolymer concrete cylinder with a standard size i.e. 150 mm × 300 mm. The molarity of NaOH solution varying from 6, 8, 10, 12, 14 to 16 M. The temperature of steam curing was carried out varied from 60oC, 80oC, up to 90oC, with duration from 1 until 4 hours. The compressive strength test conducted for 28 days old of concrete cylinder specimens. The results show an indication of an increase in the compressive strength of the concrete along with the increase in the molarity of the NaOH solution. In addition, it can also be shown that the steam curing process at a temperature of 60oC with 4 hours in duration shows optimal compressive strength results.

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“…Gambar 4. Variasi Suhu terhadap kuat tekan (Byakodi, 2016) Hal ini juga sejalan dengan penelitian yang telah dilakukan oleh Joseph & Mathew, (2012), SHAH et al, (2012, Shekhovtsova et al, (2014), Triwulan et al, (2017), Hassan, (2018, Muhammad et al, (2019) menunjukkan hasil bahwa perawatan beton geopolimer dengan suhu ruang mendapatkan nilai kuat tekan kecil dibandingkan dengan perawatan pada elevated temperature yang telah mereka uji.…”

Section: Pengaruh Ratio Alkali Aktivator Na 2 Sio 3 /Naoh Terhadap Kuat Tekanunclassified

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Panjaitan

Herlina

2020

JRKMS

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Beton merupakan salah satu material yang paling banyak digunakan untuk infrastruktur, tetapi menggunakan semen sebagai bahan dasar. Proses produksi semen akan menghasilkan gas CO2 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 Na2SiO3/NaOH, molaritas NaOH, suhu dan waktu curing, umur beton pada beton geopolimer dengan bahan dasar 100% fly ash terhadap nilai kuat tekan. Rasio alkali Na2SiO3/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.Kuat tekan beton geopolimer yang di curing akan semakin meningkat seiring dengan bertambahnya suhu curing hingga 800C, setelah melewati 800C 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.

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The Effect of Temperature Curing on Geopolymer Concrete

Cited by 22 publications

References 7 publications

Effects of Temperature in Different Initial Duration Time for Soft Clay Stabilized by Fly Ash Based Geopolymer

Effects of Temperature in Different Initial Duration Time for Soft Clay Stabilized by Fly Ash Based Geopolymer

The Effect of Steam Curing Method to the Compressive Strength of Geopolymer Concrete With Different Molarity

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