Acid Resistance of Alkali-Activated Natural Pozzolan and Limestone Powder Mortar

Al-Sodani, Khaled A. Alawi; Adewumi, Adeshina Adewale; Ariffin, Mohd Azreen Mohd; Salami, Babatunde Abiodun; Yusuf, Moruf Olalekan; Ibrahim, Mohammed; AlAteah, Ali H.; Al-Tholaia, Mohammed M. Hussein; Shamsah, Sami M. Ibn; Ismail, Mohammad

doi:10.3390/su142114451

Cited by 1 publication

(1 citation statement)

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“…Several research conducted by Arif et al [45,47], Sothornchaiwit et al [49], and Jha et al [54] also found similar findings. In addition, research conducted by Al-Sodani et al [55] reported that the most significant resilience against acid attacks was witnessed when employing a substantial quantity of natural pozzolan. The calculation of percentage loss in compressive strength by Equation (4).…”

Section: Weight Loss Percentagementioning

confidence: 99%

Effect on Sulfuric Acid Resistance and Shrinkage of Concrete Incorporating Processed Bagasse Ash and Silica Fume

Abdalla,

Shitote,

Matallah

et al. 2024

Advances in Civil Engineering

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Using ordinary Portland cement (OPC) in concrete has significant environmental and sustainability concerns. Notably, in the production of OPC, large volumes of greenhouse gases are produced, which contribute to global warming, and large amounts of natural raw materials are used, which can lead to the depletion of nonrenewable resources with time. In addition, OPC production is highly energy-intensive. To mitigate these concerns, it has become common practice to reduce the amount of OPC used in concrete production by partially replacing OPC with a supplementary cementitious material (SCM). Most of the SCMs used have pozzolanic properties and react with free lime in OPC to provide more cementitious material, which increases the long-term strength of concrete and also densifies the pore structure, resulting in improved durability in harsh environments. This study explored the effect of OPC on the resistance to sulfuric acid attack and drying shrinkage when OPC is partially replaced by processed bagasse ash (PBA) at dosages of up to 50%, together with 5% silica fume. Both materials are pozzolanic and are expected to react with free lime in OPC concrete to increase the strength and densify the concrete; however, with increased PBA dosage, the cement is diluted, and a reduction in strength can be expected. This study explores the benefits that can be realized, focusing primarily on sulfuric acid resistance and the reduction of drying shrinkage.

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