Recycling of date kernel powder (DKP) in mass concrete for mitigating heat generation and risk of cracking at an early age

Saeed, Muneer K.; Rahman, Muhammad K.; Alfawzan, Mohammed; Basha, Shameer; Dahish, Hany A.

doi:10.1016/j.conbuildmat.2023.131033

Cited by 6 publications

(6 citation statements)

References 27 publications

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“…Date kernel ash contains various chemical compounds such as silica, aluminum oxide and iron oxide, which have similar properties to cement [7]. As claimed Muneer K. Saeed et. al., (2023) [8], the date kernel powder (DKP) waste material has a strong potential for reducing heat of hydration in mass concrete structures.…”

Section: Introductionmentioning

confidence: 87%

Investigating the possibility of using date kernel ash as supplementary cementitious material in sustainable concrete

Alaa Alwash,

Bulgakov

2024

BIO Web Conf.

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The cultivation of dates from palm trees is an important economic activity in Iraq. Date production forms a significant part of the country's agricultural sector, contributing to both local consumption and export markets. The date industry supports many livelihoods and businesses in Iraq. The total number of fertile palm trees in Iraq is over 22 million. In the production of pitted dates, date molasses, date paste and date confectionery, a significant amount of date pits are usually discarded as waste. This study reports chemical analysis investigations conducted to evaluate the potential use of waste date kernel ash (DKA) compared with other pozzolanic material which is fly ash (FA) from bricks factory, tow samples obtained as a partial cement replacement in concrete, the first sample by the calcination of date pits at 500 °C for 4 hours then cooling and continue calcination at 600 °C for 2 hours, and the second sample by calcination at 500 °C for 4 hours. The results of (XRF) tests showed that DKA has low silica oxide and does not qualify as a pozzolanic material compared with a high silica oxide of FA.

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Section: Introductionmentioning

confidence: 87%

Investigating the possibility of using date kernel ash as supplementary cementitious material in sustainable concrete

Alaa Alwash,

Bulgakov

2024

BIO Web Conf.

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“…Consequently, the risk of cracking is further exacerbated. Therefore, for high-strength large-volume marine concrete structures [25][26][27][28][29][30] above C50 where it is not possible to install cooling water pipes, further research is required to develop novel methods for controlling cracks.…”

Section: Research and Applications Of Large-volume Marine Concretementioning

confidence: 99%

The Application of Heat-Shrinkable Fibers and Internal Curing Aggregates in the Field of Crack Resistance of High-Strength Marine Structural Mass Concrete: A Review and Prospects

Li,

Yu,

et al. 2023

Polymers

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High-strength large-volume marine concrete is a critical material required for the construction of large-span sea-crossing bridges. However, the widespread issue of cracking in this concrete type significantly impacts the durability and load-bearing capacity of concrete structures. Dealing with these cracks not only delays construction schedules but also increases project costs. Addressing these pressing technical issues, this project proposes the use of newly developed high-modulus heat-shrinkable fibers (polyethylene terephthalate fiber, also known as PET fiber) from the textile industry. These fibers utilize the heat generated during the hydration of large-volume concrete to trigger its contraction, applying three-dimensional micro-prestressing stress to enhance its crack resistance, while simultaneously incorporating prewetted aggregates with high-performance micro-porous structures and utilizing their internal curing effect to reduce concrete shrinkage. This helps to minimize the loss of micro-prestressing stress caused by concrete shrinkage and creep. This synergistic approach aims to improve the crack resistance of high-strength large-volume marine concrete. By employing modern testing and simulation analysis techniques, this study aims to uncover the mechanism by which the heat-shrinkable fibers exert micro-prestressing stress on concrete and the water release mechanism of internal curing aggregates during the temperature rise and fall stages of large-volume concrete. It seeks to elucidate the cooperative regulation of the microstructure and performance enhancement mechanisms of high-strength large-volume marine concrete by the heat-shrinkable fibers and internal curing aggregates. This research will lead to the development of novel methods for the design and crack control of high-strength large-volume marine concrete, which will be validated through engineering demonstrations. The outcomes of this study will provide theoretical foundations and technical support for the preparation of the crack-resistant large-volume marine concrete used in large-span bridges.

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“…Mass concrete used in many structural and non-structural applications, such as raft foundations, large size columns, concrete blocks for quay walls, suffers from cracking at early ages from the heat generated due to the hydration reaction of the binder (cement) [ 68 ]. The heat from the hydration reaction developing at the core of mass concrete element diffuses slowly to the surfaces at a rate depending on the thermal diffusivity property of concrete, resulting in a temperature increase in the core.…”

Section: Introductionmentioning

confidence: 99%

Mass GGBFS Concrete Mixed with Recycled Aggregates as Alkali-Active Substances: Workability, Temperature History and Strength

Huo

Huang²,

Han

et al. 2023

Materials

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This study provides the results of an experiment on the possibility of using high-volume ground granulated blast furnace slag (HVGGBFS)-based concrete as mass concrete. In addition to the control concrete, the total weight of the binder was 75% ground granulated blast furnace slag (GGBFS) and 25% ordinary Portland cement (OPC). For the aggregates, both natural and recycled aggregates were used. Three specimens with dimensions of 800 mm × 800 mm × 800 mm were prepared to simulate mass concrete. The workability, temperature aging and strength of the mass concrete were tested. The test results showed that utilizing HVGGBFS concrete as mass concrete can significantly reduce the heat of hydration due to the low heat of hydration of GGBFS, while the heat of hydration of GGBFS and recycled aggregate combination is 11.2% higher than normal concrete, with a slump that is 31.3% lower than that of plain concrete. The results also showed that the use of recycled aggregates in HVGGBFS concrete can significantly reduce workability. However, the compressive strength is higher than when natural aggregates are used due to the alkali activation effect caused by the recycled aggregates. The compressive strength at 7 and 28 days increased by 33.7% and 16.3%, respectively.

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Recycling of date kernel powder (DKP) in mass concrete for mitigating heat generation and risk of cracking at an early age

Cited by 6 publications

References 27 publications

Investigating the possibility of using date kernel ash as supplementary cementitious material in sustainable concrete

Investigating the possibility of using date kernel ash as supplementary cementitious material in sustainable concrete

The Application of Heat-Shrinkable Fibers and Internal Curing Aggregates in the Field of Crack Resistance of High-Strength Marine Structural Mass Concrete: A Review and Prospects

Mass GGBFS Concrete Mixed with Recycled Aggregates as Alkali-Active Substances: Workability, Temperature History and Strength

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