Design and properties of eco-friendly binary mortars containing ash from biomass-fuelled power plants

Medina, José M.; Bosque, I.F. Sáez del; Frías, Moisés; Rojas, M.I. Sánchez de; Medina, César

doi:10.1016/j.cemconcomp.2019.103372

Cited by 29 publications

(6 citation statements)

References 59 publications

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“…Despite the negative effect of BFA when applied in higher dosages, the overall environmental benefit is similar as described in the work of de Matos et al [13]. This disparity, assigned to considerably higher transportation distances in the Brazil region, comply with results described by Panesar et al [41], who investigated the effect of transportation distances to the environmental viability of alternative scenarios. In order to merge functional and environmental parameters for a clear comparison, the complex environmental efficiency and global warming efficiency are presented in Table 8.…”

Section: Environmental Assessmentsupporting

confidence: 88%

“…To be more specific, Tosti et al [40] provided LCA of BFA modified cement composites; however, the particular importance was paid only on lowered content of trace elements. Medina et al [41] consider the application of bottom fly ash from biomass combustion as an effective cement replacement towards more eco-friendly composites; however, the environmental impact is not discussed in the manuscript. In this sense, the work of Sakir et al [42] deals only with potential carbon dioxide savings.…”

Section: Introductionmentioning

confidence: 99%

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Assessment of Wood-Based Fly Ash as Alternative Cement Replacement

et al. 2020

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The abandonment of coal energy plants in the near future will result in a substantially reduced availability of the coal fly ash broadly used as an efficient supplementary material. In line with the growth of alternative and renewable energy resources, the amount of biomass-based ash rises substantially. Nevertheless, a diverse chemical composition prevents a broader utilization of biomass-based fly ash compared to coal ash on an industrial scale. On this account, the present work is aimed at investigating the basic physical and mechanical properties of concrete mortars modified by a high volume of biomass fly ash (BFA) from wood combustion. Delivered results confirm a significant potential of BFA in the building industry. Experimental analysis of concrete mortars with BFA reveals preservation or even improvement of compressive and bending strength up to 30 wt.% cement replacement. On the contrary, higher dosages induce a gradual decrease in mechanical performance. The performed Life Cycle Assessment analysis reveals the perspective of BFA incorporation taking into account environmental issues considering the ratio between preservation of mechanical performance per normalized endpoint environmental score that allows a direct comparison with other alternatives.

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Section: Environmental Assessmentsupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Assessment of Wood-Based Fly Ash as Alternative Cement Replacement

et al. 2020

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“…However, for the mortar mixtures including BBA (M-BBA-OL and M-BBA-EU), the increase was higher than the previous ones, ranging from 17% to 27%. This was due to the fact that BBA hardens in the long term by about 20% [74] or between 15% and 21% [43].…”

Section: Compressive and Flexural Strengthmentioning

confidence: 99%

Feasibility of Using New Sustainable Mineral Additions for the Manufacture of Eco-Cements

Moreno,

Rosales,

Rosales

et al. 2024

Materials

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Due to a continuously developing population, our consumption of one of the most widely used building materials, concrete, has increased. The production of concrete involves the use of cement whose production is one of the main sources of CO2 emissions; therefore, a challenge for today’s society is to move towards a circular economy and develop building materials with a reduced environmental footprint. This study evaluates the possibility of using new sustainable supplementary cementitious materials (SCMs) from waste such as recycled concrete aggregates (RCAs) and mixed recycled aggregates (MRAs) from construction and demolition waste, as well as bottom ash from olive biomass (BBA-OL) and eucalyptus biomass ash (BBA-EU) derived from the production of electricity. A micronisation pre-treatment was carried out by mechanical methods to achieve a suitable fineness and increase the SCMs’ specific surface area. Subsequently, an advanced characterisation of the new SCMs was carried out, and the acquired properties of the new cements manufactured with 25% cement substitution in the new SCMs were analysed in terms of pozzolanicity, mechanical behaviour, expansion and setting time tests. The results obtained demonstrate the feasibility of using these materials, which present a composition with potentially reactive hydraulic or pozzolanic elements, as well as the physical properties (fineness and grain size) that are ideal for SCMs. This implies the development of new eco-cements with suitable properties for possible use in the construction industry while reducing CO2 emissions and the industry’s carbon footprint.

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“…e ecoefficiency of the blend cement was evaluated by simply calculating the energy required for cement manufacture based on the energy requirement for the whole production of cement and GGBS, as proposed by Hamidi et al [36,37]. e required energy is given by the following equation:…”

Section: Ecoefficiency Evaluation Ecoefficiency Evaluation Was Carried Out For a Full-life Cycle Environmental Assessment Of The Proposedmentioning

confidence: 99%

Ecological Upgrade of Normal‐Strength Mortars by Using High Volume of GGBS

Chen

Wang

et al. 2020

Advances in Civil Engineering

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Normal-strength concrete is widely used in construction sites considering the cost, technology, and structural safety. The ecological upgrade of such materials is more meaningful for the sustainable development in a greener way. To this end, the feasibility of ecological upgrade of normal-strength mortars (NSM) by using high volume of ground granulated blast furnace slag (GGBS) (70%–90%) was evaluated in this paper. Comprehensive experiments were conducted to investigate the influences of experimental variables such as content of cement, curing temperature, and mass ratio of water to binder (w/b) on the fresh properties, compressive strength, hydration products, microstructure, and pore structure of NSM. Ecoefficiency evaluation was conducted based on the energy requirement for the whole production of cement and GGBS. Experimental results showed that ecological upgrade of NSM was viable and feasible. When substituting 70% to 90% cement by GGBS, the energy requirement of 1 t binder can be accordingly saved by 67% to 86%, and the performance energy can be reduced from 25.4 (kWh/t)/MPa to 6 to 8 (kWh/t)/MPa. With proper contents of GGBS (70% or 75%), the 28 d compressive strengths were acceptable with reductions less than 10%. Evaluated curing temperatures and decreased w/b were viable methods to promote the early-age compressive strength of NSM incorporating high volume of GGBS. For instance, raising the curing temperature to 40°C can help achieve higher early-age compressive strength than that of the control group. In addition, the pore sizes within ZII (<100 nm) of GGBS-incorporated NSM were refined by over 20 nm.

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Design and properties of eco-friendly binary mortars containing ash from biomass-fuelled power plants

Cited by 29 publications

References 59 publications

Assessment of Wood-Based Fly Ash as Alternative Cement Replacement

Assessment of Wood-Based Fly Ash as Alternative Cement Replacement

Feasibility of Using New Sustainable Mineral Additions for the Manufacture of Eco-Cements

Ecological Upgrade of Normal‐Strength Mortars by Using High Volume of GGBS

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