Pretreatment of corn stover ash to improve its effectiveness as a supplementary cementitious material in concrete

Shakouri, Mahmoud; Exstrom, Christopher L.; Ramanathan, Sivakumar; Suraneni, Prannoy; Vaux, James S.

doi:10.1016/j.cemconcomp.2020.103658

Cited by 45 publications

(17 citation statements)

References 40 publications

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“…1) and higher of surface area of CCA reduces the workability caused by high inter particle cohesion and creates the higher water demand. This is in agreement with the findings fro m previous research works [18,20,22,23]. However, 15% of CCA mix is reached flow spread of 617 mm, which decreased slump by 9.26%, in…”

Section: Slump Flowsupporting

confidence: 93%

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Effect of Artificial Fibers and Corn Cob Ash on Mechanical Behavior of High Performance Concrete

Mohan¹,

Chandrasekaran²

2022

Pol. J. Environ. Stud.

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In this research work, Corn Cob Ash is partially utilized as supplementary cementitious material (SCM) for cement and addition of different percentage of artificial fibers as micro reinforcement has been used to find the effect on fresh, mechanical and microstructural properties of HPC through testing. Firstly, the mechanical properties of HPC with different Corn Cob Ash (CCA) contents of 5, 10, 15, 20 and 25% by weight of cement were tested and the results showed that HPC with 15% CCA is the most economical replacement and it exhibits the better mechanical properties close to the reference concrete. Subsequently, 15% CCA was taken constant for PP and PS series mixes with 0.1, 0.2, 0.3 and 0.4 % addition of artificial fibers (polypropylene and polystyrene fiber by weight of binders) into HPC to evaluate its effects on slump, compressive strength, split tensile strength, flexural strength, modulus of elasticity, ultrasonic pulse velocity and microstructure. The results revealed that 15% of CCA replaced mixes along with 0.4% of artificial fibers showed better in mechanical properties and microstructure. However, above 15% of Corn Cob Ash replacement was showed poor on mechanical properties of HPC, compared to the control mix (C0) without CCA and fibers.

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Section: Slump Flowsupporting

confidence: 93%

“…CCA can be utilized as partial replacement for cement in light weight concrete [20]. Feasibility of CCA as a SCM for normal strength concrete [21,22]. The replacement of CCA was improved the durability characteristics of self-compacting concrete [9,23].…”

Section: Introductionmentioning

confidence: 99%

Effect of Artificial Fibers and Corn Cob Ash on Mechanical Behavior of High Performance Concrete

Mohan¹,

Chandrasekaran²

2022

Pol. J. Environ. Stud.

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“…Heat release, bound water, calcium hydroxide consumption, or strength measured in these tests have been correlated to various cement paste, mortar, or concrete properties. Reactivity increases as the value of the measured property increases and all tests are able to differentiate between inert and reactive materials [8][9][10][11][12][13][14][15][16][17][18][19][20].…”

Section: Comparison Between Various Testsmentioning

confidence: 99%

“…The modified R 3 test measures both heat release and calcium hydroxide consumption. While correlations with later-age concrete strength have been demonstrated [20], this test is not aimed to estimate strength. Considering the numerous factors that affect strength, the variability of strength, and the issues with strength measures such as the strength activity index [15], it is the opinion of the author that reactivity tests do not have to be able to estimate strength.…”

Section: Comparison Between Various Testsmentioning

confidence: 99%

“…A number of publications have used reactivity test outputs to predict the properties of cement paste, mortar, and concrete, or have discussed the potential of doing so [8][9][10][12][13][14][16][17][18][19][20][32][33][34][35]. We do not attempt to cover all publications or their results in detail, but present important findings and their implications.…”

Section: Prediction Of Cement Paste Mortar and Concrete Propertiesmentioning

confidence: 99%

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Recent developments in reactivity testing of supplementary cementitious materials

Suraneni

2021

RILEM Tech Lett

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Identification and rapid characterization of novel supplementary cementitious materials (SCMs) is a critical need, driven by shortfalls in conventional SCMs. In this study, we present a discussion of recently developed reactivity tests – the R3 test, the modified R3 test, the lime strength test, and the bulk resistivity index test. These tests measure reactivity parameters such as heat release, bound water, calcium hydroxide consumption, strength, and bulk resistivity. All tests can screen inert from reactive materials. To additionally differentiate pozzolanic and latent hydraulic materials, two parameters, for example, calcium hydroxide consumption and heat release, are needed. The influences of SCM bulk chemistry, amorphous content, and fineness on measured reactivity are outlined. Reactivity test outputs can predict strength and durability of cement paste/mortar/concrete; however, caution must be exercised as these properties are influenced by a variety of other factors independent of reactivity. Thoughts are provided on using reactivity tests to screen materials for concrete durability.

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Mechanical properties and life cycle assessment of sugarcane bagasse and corn cob ashes‐based geopolymer concrete to promote circular economy

Umer

Aḥmad

Abdullah

et al. 2023

Structural Concrete

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Geopolymer concrete (GC) has emerged as an environmentally friendly alternative to ordinary concrete, resulting from the alkalination of an Alumino‐Silicate (Al‐Si) source material. Large‐scale applications of GC are predicated on a suitable supply of Al‐Si sources, however rapid depletion of traditional sources like fly ash imposes a challenge therein and alternative source materials need to be identified. Agricultural waste ashes (AGWA) also exhibit high Al‐Si content; therefore, in this study, two AGWA, that is, Corn Cob Ash (CCA) and Sugarcane Bagasse Ash (SCBA) were used in lieu of fly ash for GC synthesis. The results for workability and mechanical testing showed that properties of GC remained intact for up to 20% and 10% CCA and SCBA, respectively. Life cycle assessment showed that AGWA‐based GC reduced the greenhouse gas emissions of ordinary concrete by 49% and can be used as an environmentally friendly alternative thereof, thus contributing to the circular economy.

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Pretreatment of corn stover ash to improve its effectiveness as a supplementary cementitious material in concrete

Cited by 45 publications

References 40 publications

Effect of Artificial Fibers and Corn Cob Ash on Mechanical Behavior of High Performance Concrete

Effect of Artificial Fibers and Corn Cob Ash on Mechanical Behavior of High Performance Concrete

Recent developments in reactivity testing of supplementary cementitious materials

Mechanical properties and life cycle assessment of sugarcane bagasse and corn cob ashes‐based geopolymer concrete to promote circular economy

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