Effectiveness of oil shale ash in reducing alkali-silica reaction expansions

Yeğinobali, Asim; Smadi, Mohammad; Khedaywi, Taisir S.

doi:10.1007/bf02472933

Cited by 9 publications

(3 citation statements)

References 2 publications

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“…The ash obtained at 700 °C was observed to have optimum values in terms of fineness, activity and strength. Therefore, this ash was used to investigate the effect of 30% ash additive in cement [18].…”

Section: Investigation Of Cements With Ash Additionmentioning

confidence: 99%

Suitability of Oil Shale Ash as a Constituent of Cement

Oymael¹

2007

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Physical and chemical characteristics of ashes formed at burning oil shale at temperatures 500, 600, 700, 800, 900 and 1030 °C were studied. Standard procedures were used to determine both pozzolanic activity and binding parameters. The most suitable characteristics were provided with oil shale ash formed at 700 °C. Ashes (15 and 30%) were added to ordinary Portland cement. The optimum pozzolanic characteristics and performances were provided by the mixture containing 15% ashes. The mixes meet the corresponding Turkish standards, and therefore, this oil shale can be used as an admixture in Portland cement.

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Section: Investigation Of Cements With Ash Additionmentioning

confidence: 99%

Suitability of Oil Shale Ash as a Constituent of Cement

Oymael¹

2007

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“…The studies showed that OSA can replace cement in concretes and mortars by up to 30% of the cement mass, defining the 10% replacement content as ideal [21,38,39,41]. Furthermore, OSA as a cement substitute in pastes and mortars has been limited to 20%-all grades are in % by weight of cement from now on [36,37,44,46]. Other studies, on the other hand, have used OSA as an addition in pastes and concretes, varying its concentration between 15%wc and 30%wc [34,40,42].…”

Section: Osa Contentmentioning

confidence: 99%

Towards eco-friendly cement-based materials: a review on incorporating oil shale ash

Silva,

Reis,

de Azevedo

et al. 2024

Discov Civ Eng

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Considering the growing environmental concerns associated with construction industry activities, this article reviews the potential use of oil shale ash (OSA) as a cement substitute in cementitious materials. Specific issues to be investigated include the ideal OSA content to be incorporated into the mix, the optimum oil shale (OS) burning temperature for obtaining the ash, the influence of the specific area and chemical composition of the OSA on the composites, as well as the effects of its addition on the fresh state, mechanical and durability properties. To this end, the ProKnow-C systematic literature review process was adopted for the first time to study this topic, resulting in a portfolio of 14 manuscripts associated with the questions to be analyzed. The primary outcomes include: OSA contents between 10 and 30% are suitable for replacing cement; the ideal burning temperature for OS is between 600 and 800 ºC; high specific areas (between 6000 and 8000 cm2/g) improve pozzolanic activity; high OSA contents may require the use of water-reducing additives to improve workability; incorporating OSA into Portland cement-based materials can improve their compressive strength and durability. These conclusions highlight the importance of understanding the effects of incorporating OSA in developing cementitious materials, providing a basis for future research.

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“…The addition of SA in concrete had been reported to increase the concrete strength, reduce the permeability and improve frost resistance [27]. However, the alkali content in SA is generally at the high side, and the content of SA in concrete should be limited to prevent expansive alkali-silicate reaction [28].…”

Section: Use Of Sustainable Binder Materialsmentioning

confidence: 99%

Development of Sustainable High-Strength Self-Consolidating Concrete Utilising Fly Ash, Shale Ash and Microsilica

Ng¹,

Rudžionis²,

Ng³

et al. 2018

Sustainable Buildings - Interaction Between a Holistic Conceptual Act and Materials Properties

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With high flowability and passing ability, self-consolidating concrete (SCC) does not require compaction during casting and can improve constructability. The favourable properties of SCC have enabled its widespread adoption in many parts of the world. However, there are two major issues associated with the SCC mixes commonly used in practice. First, the cement content is usually at the high side. Since the production of cement involves calcination at high temperature and is an energy-intensive process, the high cement content imparts high embodied energy and carbon footprint to the SCC mixes. Besides, the exothermic reaction of cement hydration would cause high heat generation and early thermal cracking problem that would impair structural integrity and necessitate repair. Second, the strength is usually limited to around grade 60, which is considered as medium strength in nowadays achievable norm. With a view to develop sustainable high-strength self-consolidating concrete (HS-SCC), experimental research utilising fly ash (FA), shale ash (SA), and microsilica (MS) in the production of SCC has been conducted, as reported herein.

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Effectiveness of oil shale ash in reducing alkali-silica reaction expansions

Cited by 9 publications

References 2 publications

Suitability of Oil Shale Ash as a Constituent of Cement

Suitability of Oil Shale Ash as a Constituent of Cement

Towards eco-friendly cement-based materials: a review on incorporating oil shale ash

Development of Sustainable High-Strength Self-Consolidating Concrete Utilising Fly Ash, Shale Ash and Microsilica

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