Effect of various biochars on physical, mechanical, and microstructural characteristics of cement pastes and mortars

Javed, Muhammad Haris; Sikandar, Muhammad Ali; Ahmad, Waqas; Bashir, Muhammad Tariq; Alrowais, Raid; Wadud, Muhammad Bilal

doi:10.1016/j.jobe.2022.104850

Cited by 20 publications

(9 citation statements)

References 40 publications

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“…Biochar is a kind of biomass material produced by pyrolysis of waste biomass at a high temperature under anoxic conditions [ 5 ]. Incorporating pulverized biochar particles into cement-based materials can improve their mechanical and durability properties through densification and pore-blocking mechanisms, resulting in both environmental and economic benefits [ 6 , 7 , 8 ]. Although research on the application of biochar in cementitious materials dates back to the 1980s, significant progress has only been made in the past decade.…”

Section: Introductionmentioning

confidence: 99%

Effect of Biochar Dosage and Fineness on the Mechanical Properties and Durability of Concrete

Ling

Wu²,

Tan

et al. 2023

Materials

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Biochar (BC), a byproduct of agricultural waste pyrolysis, shows potential as a sustainable substitute material for ordinary silicate cement (OPC) in concrete production, providing opportunities for environmental sustainability and resource conservation in the construction industry. However, the optimal biochar dosage and fineness for enhancing concrete performance are still unclear. This study investigated the impact of these two factors on the mechanical and durability properties of biochar concrete. Compressive and flexural strength, carbonation resistance, and chloride ion penetration resistance were evaluated by varying biochar dosages (0%, 1%, 3%, 5%, 10%) and fineness dimensions (44.70, 73.28, 750, 1020 μm), with the 0% dosage serving as the control group (CK). The results showed that the addition of 1–3 wt% of biochar could effectively reduce the rapid carbonation depth and chloride diffusion coefficient of concrete. The compressive and flexural strength of BC concrete initially increased and then decreased with the increase in biocarbon content, BC with a fineness of 73.28 μm having the most significant effect on the mechanical strength of concrete. At the dosage of 3 wt%, BC was found to promote the hydration degree of cement, improving the formation of cement hydration products. These findings provide valuable insights for the development of sustainable and high-performance cement-based materials with the appropriate use of biochar as an additive.

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Section: Introductionmentioning

confidence: 99%

Effect of Biochar Dosage and Fineness on the Mechanical Properties and Durability of Concrete

Ling

Wu²,

Tan

et al. 2023

Materials

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“…According to [19] the interaction between biochar and LOF has the potential to improve the physical, chemical and biological properties of the soil so that nutrients are more available in the soil. According to [20], biochar is able to increase water holding capacity and provide nutrients in improving nutrient uptake by plants thus increasing soil fertility. [21] states that optimal plant growth can be achieved if plants are watersufficient.…”

Section: Plant Fresh Weight (G)mentioning

confidence: 99%

Growth of mint (Mentha spicata L.) on various biochar and liquid organic fertilizers

Rahayu,

Sakya,

Setyawati

et al. 2023

E3S Web Conf.

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Climate change has an impact on plant growth, including mint. Mint grows optimally in environments with low temperatures and high humidity. Erratic climate change has the potential to reduce mint growth. Biochar is a soil enhancer that can improve soil fertility and soil water availability. Liquid Organic Fertilizer (LOF) is able to provide the nutrients needed by plants so that it has the potential to increase mint growth. This research was conducted in August 2022 - June 2023 in the greenhouse of the Agriculture's Faculty, Sebelas Maret University, Surakarta. The study used a factorial Randomized Complete Group Design (RCBD), which consisted of two factors, namely biochar and fish waste LOF. The types of biochar consisted of no biochar treatment, palm fiber biochar, and rice husk biochar. Fish waste LOF consisted of no LOF treatment, 5 ml/L water, 10 ml/L water, and P3 = 15 ml/L water. The results showed that the application of palm fiber biochar and 5 ml/L fish waste liquid fertilizer can increase plant fresh weight and plant dry weight. Giving palm fiber biochar can increase plant fresh weight, while the addition of rice husk biochar can increase leaf area and plant dry weight. This research has implications to knowing the interaction of biochar type and LOF concentration, getting the appropriate biochar type to increase mint growth, and getting the appropriate LOF concentration to increase mint growth. concentration that is suitable for increasing mint growth.

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“…In addition, carbon-based reinforcements are difficult to disperse in the cementitious matrix homogeneously, due to their hydrophobic nature [15]. The use of biochar as a carbon-based reinforcement can improve the mechanical properties of cementitious materials, while at the same time being economically sustainable and environmentally friendly, mitigating CO 2 emissions that contribute to the greenhouse effect [16][17][18][19].The use of biochar as a carbon reinforcement within cementitious matrix composites has received particular attention in recent years [20][21][22][23][24][25][26][27][28][29]. Ahmad et al [30] observed that the addition of 0.08 wt.…”

Section: Introductionmentioning

confidence: 99%

Enhancing Cement Paste Properties with Biochar: Mechanical and Rheological Insights

Suarez-Riera,

Lavagna,

Carvajal

et al. 2024

Applied Sciences

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Biochar, the solid sub-product of biomass pyrolysis, is widely considered an effective water retention material thanks to its porous microstructure and high specific surface area. This study investigates the possibility of improving both mechanical and rheological properties of cement pastes on a micro-scale. The results show that using biochar as a reinforcement at low percentages (1% to 5% by weight of cement) results in an increase in compressive strength of 13% and the flexural strength of 30%. A high fracture energy was demonstrated by the tortuous crack path of the sample at an early age of curing. A preliminary study on the rheological properties has indicated that the yield stress value is in line with that of self-compacting concrete.

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Effect of various biochars on physical, mechanical, and microstructural characteristics of cement pastes and mortars

Cited by 20 publications

References 40 publications

Effect of Biochar Dosage and Fineness on the Mechanical Properties and Durability of Concrete

Effect of Biochar Dosage and Fineness on the Mechanical Properties and Durability of Concrete

Growth of mint (Mentha spicata L.) on various biochar and liquid organic fertilizers

Enhancing Cement Paste Properties with Biochar: Mechanical and Rheological Insights

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