Early age compressive strength, porosity, and sorptivity of concrete using peat water to produce and cure concrete

Olivia, Monita; Ismeddiyanto,; Wibisono, Gunawan; Sitompul, Iskandar Romey

doi:10.1063/1.5003510

Cited by 4 publications

(1 citation statement)

References 9 publications

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“…Peat can have a very low pH due to pyrite oxidation [15]. A study on the early strength performance of various FAGC, including FAGC in peat environment, conducted by Olivia et al [17] reported that geopolymer shows a slow gain of earlyage strength until 28 days compared to OPC, high volume fly ash, and blended cement concrete subjected to peat water. Felix Wijaya et al [18] noted that a geopolymer hybrid (mix of low-quality fly ash containing >15% carbon and Portland cement) shows an increase in strength and a decrease in porosity.…”

Section: Introductionmentioning

confidence: 99%

Fly ash geopolymer concrete durability to sulphate, acid and peat attack

Patrisia

Law²,

Gunasekara³

et al. 2022

MATEC Web Conf.

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The durability of concrete has a profound impact on the service life of structural elements. Indonesia has extensive peat soils, which provide a highly aggressive environment for concrete structures. Geopolymer concrete has demonstrated good durability when exposed to acid /sulphate conditions similar to those encountered in peat soils. This paper investigates the performance of geopolymer concretes produced using Indonesian type F fly ash under sulphate and acid chemical attack. Geopolymer concrete specimens have been exposed for 12-months in a range of solutions: 5% sodium sulphate, 5% magnesium sulphate, 1% and 3% sulphuric acid, and simulated peat solution. The mechanical and durability properties of specimens together with a control concrete have been monitored for compressive strength, change in mass, water absorption and volume of permeable voids, ultra pulse velocity, air and water permeability, pH profile, and microstructural analysis (XRD, SEM/EDS). The control immersed in water achieved 56.93 MPa at 12-months of age. Magnesium sulphate exposure had a significant deterioration impact on the compressive strength of geopolymer concrete, demonstrating an 11% reduction in strength, while those exposed to sodium sulphate had an 8.9% increase in strength. Specimens exposed to peat solution displayed a slightly increased strength and those in acid conditions a 1.2% and 4.5% decrease in 1% acid and 3% acid, respectively. In general, the geopolymer concrete displayed a high level of resistance against sodium sulphate, 1% sulphuric acid and simulated peat attack.

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Section: Introductionmentioning

confidence: 99%

Fly ash geopolymer concrete durability to sulphate, acid and peat attack

Patrisia

Law²,

Gunasekara³

et al. 2022

MATEC Web Conf.

View full text Add to dashboard Cite

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Mechanical properties of blended palm oil fuel ash (POFA) concrete admixed with silica in peat water environment

Olivia,

Asmanovita,

Sinuhaji

et al. 2024

AIP Conference Proceedings

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Geopolymer hybrid fly ash concrete for construction and conservation in peat environment: A review

Yanuari

Septari

Rindy

et al. 2021

IOP Conf. Ser.: Earth Environ. Sci.

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Fly ash is industrial residue from the coal combustion in electric and steam generating plants and recognized as an environmental pollutant. Fly ash contains a high concentration of silica and alumina and can be used as geopolymer concrete. Studies the use of fly ash as a geopolymer concrete mixture has been developing in recent decades. This review focuses on the characteristics of fly ash as hybrid geopolymer concrete, and its resistance is peat environment. The hybrid geopolymer is made by activating fly ash using an alkaline activator and Portland cement. The addition of fly ash geopolymer concrete with Portland cement forms N-A-S-H bond structure from fly ash, and C-S-H hydration bond from Portland cement forms C-A-S-H, which is more solid and stronger against aggressive environment such as peat. In addition, the geopolymer concrete is proven to be able to mobilize heavy metals in fly ash so the concrete has low leaching rate and not harmful to the peat ecosystem. This review proves that hybrid geopolymer concrete using fly ash is a potentially innovative and promising material in the future. The geopolymer hybrid not only has its resistance to peat and acts as conservative material in an environmentally friendly peat environment.

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Early age compressive strength, porosity, and sorptivity of concrete using peat water to produce and cure concrete

Cited by 4 publications

References 9 publications

Fly ash geopolymer concrete durability to sulphate, acid and peat attack

Fly ash geopolymer concrete durability to sulphate, acid and peat attack

Mechanical properties of blended palm oil fuel ash (POFA) concrete admixed with silica in peat water environment

Geopolymer hybrid fly ash concrete for construction and conservation in peat environment: A review

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