Effects of Grinding Methods and Water-to-Binder Ratio on the Properties of Cement Mortars Blended with Biomass Ash and Ceramic Powder

Pantić, Vladan; Šupić, Slobodan; Vučinić–Vasić, Milica; Nemeš, Tomas; Malešev, Mirjana; Lukić, Ivan; Радоњанин, Властимир

doi:10.3390/ma16062443

Cited by 4 publications

(3 citation statements)

References 54 publications

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“…At higher biochar contents, the negative mechanical effect is primarily due to the high surface area and numerous pores that tend to sequester hydration water, as shown in Table 2. This phenomenon worsens the workability of the composite and further lowers the water-to-cement ratio, thereby not ensuring sufficient water for optimal cement hydration and deteriorating performance [44]. This effect has also been observed in the literature by Tan et al [42], although the flexural strength decrease is less pronounced in our case.…”

Section: Discussionsupporting

confidence: 83%

The Effect of Different Biochar on the Mechanical Properties of Cement-Pastes and Mortars

Suarez-Riera,

Falliano,

Carvajal

et al. 2023

Buildings

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In recent years, there has been a concerning surge in CO2 emissions, with the construction and materials production sectors standing out as significant contributors to greenhouse gas pollution. To tackle this pressing environmental challenge, architectural design and civil engineering are actively pursuing strategies to mitigate their carbon footprint. These initiatives include adopting eco-friendly construction materials with reduced toxicity, rigorous energy management practices across the entire life cycle of structures, and incorporating innovative materials like biochar. Biochar is a carbon-rich byproduct generated through controlled thermochemical processes, such as pyrolysis or gasification, that stands out for its remarkable capacity to extract energy from processed biomass while delivering substantial environmental advantages. This study examines the use of biochar as a filler in cement-paste and mortar, as well as its influence on mechanical properties. In the case of cementitious pastes, results show that small amounts of biochar (1-2-5% by weight of cement) can improve the compressive and flexural strength, as well as fracture energy, thus generating a more tortuous crack path that increases the final surface area. In mortar specimens, the biochar influence does not show similar patterns or characteristics as the cement-paste in flexural and compressive strengths; nevertheless, biochar particles improve the toughness.

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Section: Discussionsupporting

confidence: 83%

The Effect of Different Biochar on the Mechanical Properties of Cement-Pastes and Mortars

Suarez-Riera,

Falliano,

Carvajal

et al. 2023

Buildings

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“…The test mixing water was tap water. The nano-clay material chosen for this paper was nano-kaolinite, which is refined by crushing raw kaolinite ore with a crusher, then using an impact mill for 40 min of ultra-fine grinding [31], and then calcining it. Its physical index, chemical composition, and activity index are detailed in Tables 2-4.…”

Section: Methodsmentioning

confidence: 99%

Effect of Nano-Clay Dispersion on Pore Structure and Distribution of Hardened Cement Paste

Wu,

Chen,

Zhang

et al. 2023

Buildings

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Nano-clay has the potential to improve the properties of cement-based materials. However, the effectiveness of this improvement is influenced by the dispersion of the nano-clay. The effects of different nano-clay dispersion techniques on cement-based material properties and pore structure complexity were studied. The samples were prepared using manual and mechanical dispersion methods. The mechanical properties of the specimens were evaluated, and the pore characteristics of the cement-based materials were analysed using mercury intrusion porosimetry. The study investigated the effect of the dispersion method on the nano-clay dispersion. The complexity of the pore structure was evaluated using a fractal model, and the relationship between the fractal dimension, mechanical properties, and pore structure was analysed. The findings indicate that mechanical dispersion results in better dispersion than manual dispersion, and the mechanical properties of mechanical dispersion are superior to those of manual dispersion. Nano-clay particles can improve the internal pore structure of cement materials. Through mathematical calculation, the surface fractal dimension is between 2.90 and 2.95, with good fractal characteristics. There is a good correlation between the surface fractal dimension and the mechanical properties. The addition of nano-clay can reduce the complexity of the pore structure, and the fractal dimension has an excellent linear relationship with the pore structure.

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“…Every year, the total amount of waste produced by ceramic plants makes up about 3-7% of their entire final output. It is estimated that the ceramics industry in Vojvodina produces 6000 tons of ceramic waste annually [7]. In comparison, the amount of ceramic waste produced daily in Goa (India's smallest state) is 30 million tons, while around 13 million tons of waste ceramics are discarded every year in China [8].…”

Section: Introductionmentioning

confidence: 99%

Environmentally Friendly Masonry Mortar Blended with Fly Ash, Corn Cob Ash or Ceramic Waste Powder

Šupić,

Malešev,

Pantić

et al. 2023

Materials

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Implementing a circular approach through waste valorization in mortar production with environmentally efficient mix design is a viable pathway for relieving the ecological burden of greenhouse gas emissions, resource depletion and waste management. The main objective of this paper is to evaluate the feasibility of using fly ash (FA), corn cob ash (CCA), and ceramic waste powder (CWP) as supplementary cementitious materials (SCM) in cement–lime masonry mortars. As part of an extensive experimental study, twelve mortar mixtures were made: three reference and nine blended, with mixing ratios of 1:1:5, 1:0.7:4.2, and 1:1:4 ((cement + SCM)/lime/sand), by volume. The examined properties include workability, compressive and flexural strengths, dry bulk density, capillary water absorption, adhesive bond strength, and water vapor permeability. The compressive and flexural strengths of tested mortars were notably impaired, with reductions of up to 60%, while the capillary water absorption coefficient rose by 100% compared to the reference values. The adhesive bond strength of some blended mortars exceeded the strength of the reference mortars. Nevertheless, all blended mortars fulfilled the requirements for general-purpose mortars, while the majority met the criteria for structural masonry applications. In addition, a performance-based index and weighting triangle were used for the comparison and ranking of all analyzed mortar mixtures. The findings of this study may herald a novel use of FA, CCA, and CWP as more eco-friendly binding materials in contemporary construction leading to the reduction in the process’s carbon footprint, the improvement in cost efficiency, and the mitigation of the detrimental environmental impact of waste disposal.

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Effects of Grinding Methods and Water-to-Binder Ratio on the Properties of Cement Mortars Blended with Biomass Ash and Ceramic Powder

Cited by 4 publications

References 54 publications

The Effect of Different Biochar on the Mechanical Properties of Cement-Pastes and Mortars

The Effect of Different Biochar on the Mechanical Properties of Cement-Pastes and Mortars

Effect of Nano-Clay Dispersion on Pore Structure and Distribution of Hardened Cement Paste

Environmentally Friendly Masonry Mortar Blended with Fly Ash, Corn Cob Ash or Ceramic Waste Powder

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