Pozzolanic activity of palm bunch wastes

Adepegba, Dotun

doi:10.1007/bf02472191

Cited by 5 publications

(7 citation statements)

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“…For the 1:6 mix, a 20.2% reduction was observed in 6PA10 and 9.5% reduction in 6PA15. Due to the low pozzolanic activity of POEFBA with Portland cement at 28 days (68.1%) it can be inferred that the production of secondary C-S-H gel from the pozzolanic reactions at this stage was not enough to compensate for the dilution effect of Portland cement, which contributed to the observed tendency of reduction of compressive strength values [24,26]. However, similar to that observed in [40], the filler effect of the ash particles, capable of occupying the voids of the material and favoring the packaging of the grains, alleviated the loss of resistance, giving small variations in groups 3PA5, 3PA10 and 6PA5 in relation to the respective reference groups.…”

Section: Resultsmentioning

confidence: 99%

“…However, attention should be given to the fact that different industries produce ash with varying characteristics depending on their burning process and especially the composition and proportion of the materials used as biomass [22,23]. The use of palm oil empty fruit bunch ash (POEFBA) in cementitious compounds is still little explored [18,24]. Most of the studies in the field are related to the use of ash resulting from the burning of palm oil fiber, shell and kernel due to the great use of these by-products as biomass for boiler feed in the leading production countries such as Malaysia and Thailand [6,17,19,[25][26][27].…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of mortar properties obtained through partial substitution of Portland cement by ashes of oil palm empty fruit bunch

et al. 2019

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Currently, palm oil is a leader in production and consumption among commercial edible oils, with a growing world production that exceeds 66 million tons per year. It is estimated that the generation of residues from the burning of palm oil empty fruit bunches as fuel in the boilers corresponds to 5% in mass of the total of oil extracted. This work evaluated the mechanical properties resulting from the use of the empty fruit bunch ashes as a partial substitute of Portland cement in mortars in different contents in 1:3 and 1:6 mixes. Mortars obtained with the use of ash presented greater deformability, implying greater workability. The results obtained pointed to potential use of the ash as filler in mortars without loss on compressive strength for contents up to 10% in the 1:3 mix and 5% in the 1:6 mix. It was observed an increase in the void index and the water absorption capacity, with a proportional reduction of the flexural strength.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluation of mortar properties obtained through partial substitution of Portland cement by ashes of oil palm empty fruit bunch

et al. 2019

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“…The manufacture rate is roughly about 2.1 billion tons per year, it is expected to grow to about 3.5 billion tons per year by 2015 or more [1,2]. According to Adepegba, but in Nigeria the annual cement requirement in Nigeria is about 8.2 million tones and only 4.6 million tons of Portland cement are generated locally [3,4]. The balance of 3.6 million tons or more is imported.…”

Section: Introductionmentioning

confidence: 99%

“…If alternative cheap cement can be manufacture locally, the demand for Portland cement will reduce. The search for suitable local materials to manufacture pozzolana cement was therefore intensified [3,5]. A large amount increase in cement demand could be met through the application of supplementary cementing materials, this to ensure there is reduction of green gas emission [6,7].…”

Section: Introductionmentioning

confidence: 99%

Partial Replacement of Microsilca on Compressive Strength Concrete: Applying Predictive Model

2020

AMSE

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Monitoring the rate of micro-silica variation was carried out to determine different rate of strength developed applying various dosage, these are the pozzolanic reaction which occurs between silica fume and CH producing additional CSH in many of the voids around hydrated cement particles. This is due to high surface area of silica fume that normally affect the mobility of water within concrete segregation, this include bleeding of concrete that are virtually eliminated . This application detailed on the reactions from micro-silica reflection of it are influential factors on rapid increase of concrete strength, these are based on the mixed designed output, such application reflects the significant growth rate of concrete performance in the study, mathematical model application using analytical solution generated derived model for the study, this derived model techniques developed predictive values through simulation, the predictive were applied on the reflection of various water cement ratios including variation of micro-silica dosage numerically to ninety days of curing, water cement ratios influence of strength development were expressed in the study, variation of concrete permeability and void ratios are also detailed as an influential factor in concrete formations, the study has express its significant influence based on the developed strength within seven and ninety days of curing.

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“…The production rate is approximately 2.1 billion tonnes per year, and is expected to grow exponentially to about 3.5 billion tonnes per year by 2015 [3]. According to Adepegba [4] the annual cement requirement in Nigeria is about 8.2 million tonnes and only 4.6 million tonnes of Portland cement are produced locally. The balance of 3.6 million tonnes or more is imported.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Strength Properties of Palm Kernel Shell Ash Concrete

Olutoge

Quadri

Olafusi

2012

Eng. Technol. Appl. Sci. Res.

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Many researchers have studied the use of agro-waste ashes as constituents in concrete. These agro-waste ashes are siliceous or aluminosiliceous materials that, in finely divided form and in the presence of moisture, chemically react with the calcium hydroxide released by the hydration of Portland cement to form calcium silicate hydrate and other cementitious compounds. Palm kernel shell ash (PKSA) is a by-product in palm oil mills. This ash has pozzolanic properties that enables it as a partial replacement for cement but also plays an important role in the strength and durability of concrete. The use of palm kernel shell ash (PKSA) as a partial replacement for cement in concrete is investigated. The objective of this paper is to alleviate the increasing challenges of scarcity and high cost of construction materials used by the construction industry in Nigeria and Africa in general, by reducing the volume of cement usage in concrete works. Collected PKSA was dried and sieved through a 45um sieve. The fineness of the PKSA was checked by sieving through 45um sieve. The chemical properties of the ash are examined whereas physical and mechanical properties of varying percentage of PKSA cement concrete and 100% cement concrete of mix 1:2:4 and 0.5 water-cement ratios are examined and compared. A total of 72 concrete cubes of size 150 × 150 × 150 mm³ with different volume percentages of PKSA to Portland cement in the order 0:100, 10:90 and 30:70 and mix ratio of 1:2:4 were cast and their physical and mechanical properties were tested at 7, 14, 21 and 28 days time. Although the compressive strength of PKSA concrete did not exceed that of OPC, compressive strength tests showed that 10% of the PKSA in replacement for cement was 22.8 N/mm2 at 28 days; which was quite satisfactory with no compromise in compressive strength requirements for concrete mix ratios 1:2:4. This research showed that the use of PKSA as a partial replacement for cement in concrete, at lower volume of replacement, will enhance the reduction of cement usage in concretes, thereby reducing the production cost. This research was carried out at the University of Ibadan, Ibadan, Nigeria.

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Pozzolanic activity of palm bunch wastes

Cited by 5 publications

References 0 publications

Evaluation of mortar properties obtained through partial substitution of Portland cement by ashes of oil palm empty fruit bunch

Evaluation of mortar properties obtained through partial substitution of Portland cement by ashes of oil palm empty fruit bunch

Partial Replacement of Microsilca on Compressive Strength Concrete: Applying Predictive Model

Investigation of the Strength Properties of Palm Kernel Shell Ash Concrete

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