Biomass ashes from agricultural wastes as supplementary cementitious materials or aggregate replacement in cement/geopolymer concrete: A comprehensive review

Thomas, Blessen Skariah; Yang, Jian; Mo, Kim Hung; Abdalla, Jamal A.; Hawileh, Rami A.; Ariyachandra, Erandi

doi:10.1016/j.jobe.2021.102332

Cited by 119 publications

(62 citation statements)

References 84 publications

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“…In each group with different reinforcement diameters (16,20, and 25 mm), BLASH with 10% content had the lowest mass loss rates. When the amount of BLASH content increased by more than 10%, the rate of mass loss was higher than that of the control specimen (0% BLASH).…”

Section: Mass Loss Ratementioning

confidence: 98%

“…On the other hand, cement, a basic component of concrete, is widely accepted as a common construction material because of the availability and abundance of raw materials, low costs, and adaptability of concrete to various shapes [13,[18][19][20]. However, the production of Portland cement is considered a major contributor to greenhouse gas emissions [21].…”

Section: Introductionmentioning

confidence: 99%

“…According to Thomas et al, bamboo is the highest-yielding and abundant construction material that can be found in any locality. It has an estimated annual production of 20 million tons worldwide [20]. It has proven to be an agro-waste product that is highly useful in the construction industry [27].…”

Section: Introductionmentioning

confidence: 99%

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Assessment and Evaluation of Blended Cement Using Bamboo Leaf Ash BLASH Against Corrosion

2021

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Concrete provides a high degree of protection against corrosion of embedded steel reinforcement. Owing to the harsh environmental conditions and the presence of aggressive elements from the marine environment, deteriorating corrosion affects the durability of reinforced concrete structures. This study evaluated the effectiveness of bamboo leaf ash BLASH as a supplementary cementing material or admixture with Portland cement to improve the durability of reinforced concrete structures. Specimens of 0, 10, 15, and 20% BLASH mixtures were prepared using 16, 20, and 25 mm steel reinforcements. A total of 100 cylindrical specimens were cast and used in this study. The specimens were accelerated by corrosion using impressed current techniques and a galvanostatic method in a simulated environment. The results show that specimens with a BLASH content of 10% exhibited superior performance and exhibited longer corrosion initiation and propagation times. It has a higher resistance to acid penetration and lower corrosion rates. The crack parameters of the specimen with BLASH admixtures, such as the crack width and crack frequency, were negligible. The use of BLASH as an admixture strengthens its durability and improves its residual strength and serviceability. Doi: 10.28991/cej-2021-03091707 Full Text: PDF

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Section: Mass Loss Ratementioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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Assessment and Evaluation of Blended Cement Using Bamboo Leaf Ash BLASH Against Corrosion

2021

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“…In addition, peat products are distinguished by a high degree of purification, ease of recycling and the possibility of producing selective sorbents, as well as the ability to remain on the water surface for a long time (more than one month). And after selective sorption of liquid hydrocarbons, the material (sorbent-sorbate system) forms an even more stable floating conglomerate [19], which can be relatively easily removed from the water surface and sent for recycling, including by low-temperature catalytic pyrolysis (gasification) [24].…”

Section: Environment Protectionmentioning

confidence: 99%

Directions for the Rational Use of Additional Organic and Mineral Resources of Peat Deposits

Misnicow

Iablonev

2021

E3S Web Conf.

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The article discusses the issues of insufficient use of organic and mineral resources of peat deposits (substandard peat, mineralised sapropel, wood inclusions of peat deposit, organomineral deposits, etc.). The authors propose a structural scheme of directions of processing and use of organic and organomineral biogenic resources. It includes obtaining various types of composite formed materials for their application in four main directions: energy, agricultural production, environmental protection, and construction industry. Mineral clay components improve the ability of composite materials to be shaped by extrusion and pelletising methods. Some of them also have catalytic activity, which is the basis for their use in thermochemical processing. In peat raw materials, subjected to the process of self-heating during the storage, there is a change of the group chemical composition with the formation of hydrophobic compounds (termobitums). This opens up additional perspectives of their extraction and usage for hydrophobic modification of mineral disperse materials. The classification of industrial wastes and organomineral resources of peat deposits according to the required qualitative characteristics with the indication of possible directions of additional processing is presented in the paper.

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“…From then on, the research of geopolymer materials burgeoned rapidly. In the most recent decade, using industrial solid wastes to prepare geopolymer-based cementitious materials intrigued great interests [3][4][5]. It was pointed out that geopolymers can be used as cementitious material to replace portland cement and manufacture low carbon concentrations [6].…”

Section: Introductionmentioning

confidence: 99%

Microstructure Evolution Mechanism of Geopolymers with Exposure to High-Temperature Environment

Lu¹,

Cui

Xian³

et al. 2021

Crystals

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The investigation on geopolymers has intrigued broad interests in the past decades, due to the requirements for the recycling of aluminosilicate solid wastes, such as red mud, slags, sludges and demolished concrete. Previous studies have demonstrated the feasibility of reusing this Aluminosilicate as a resource to prepare cementitious materials and indicated their promising properties at ambient temperature. However, when this material was exposed to high temperatures, especially above 1000 °C, the microstructure evolution mechanisms were not systematically investigated. In this study, the microstructural evolution process of metakaolin-based K geopolymer (molar ratio of K:Al:Si was 1:1:4) is investigated. The crystalized leucite originated from the geopolymer precursor was detected above 1000 °C. The SEM results indicate that the microstructure of the geopolymer before heating was composed of non-reacted metakaolin with a typical layered structure and reacted amorphous binder phase. As the geopolymer heated to 1000 °C, the microstructure of the geopolymer changed to a porous structure with an average pore size from 10 to 30 μm. When the heating temperature reached 1100 °C, the pores started to close along with the leucite crystallization process. As the heating temperature reached 1200 °C, most of the pores were closed. The TEM results show that the microstructure of the geopolymer, after being heated to 1400 °C, was composed of an amorphous glassy phase and crystallized leucite phase. The crystallized leucite grains originated from the nano-sized crystal nuclei, with an average size of 2–3 nm. The TEM-EDS results indicate that the chemical composition of the glassy phase was complicated. It varied from area to area because of the movement and uneven distribution of K.

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Biomass ashes from agricultural wastes as supplementary cementitious materials or aggregate replacement in cement/geopolymer concrete: A comprehensive review

Cited by 119 publications

References 84 publications

Assessment and Evaluation of Blended Cement Using Bamboo Leaf Ash BLASH Against Corrosion

Assessment and Evaluation of Blended Cement Using Bamboo Leaf Ash BLASH Against Corrosion

Directions for the Rational Use of Additional Organic and Mineral Resources of Peat Deposits

Microstructure Evolution Mechanism of Geopolymers with Exposure to High-Temperature Environment

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