Biomass ash-based mineral admixture prepared from municipal sewage sludge and its application in cement composites

Záleská, Martina; Pavlík, Zbyšek; Pavlíková, Milena; Scheinherrová, Lenka; Pokorný, Jaroslav; Trník, Anton; Svora, Petr; Fořt, Jan; Jankovský, Ondřej; Suchorab, Zbigniew; Černý, Robert

doi:10.1007/s10098-017-1465-3

Cited by 50 publications

(13 citation statements)

References 38 publications

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“…From elemental maps of other elements, the presence of SiO 2 (green colour in right top image) and calcium silicates and hydrates (red colour in right top image) was confirmed. This corresponds to the products of cement/silica hydration, nominally to C-H (Portlandite) and C-S-H phases of different forms [35]. Moreover, the presence of alumina (violet colour in right top image) gives evidence of occurrence of C-A-H and C-S-A-H phases.…”

Section: Aggregatementioning

confidence: 94%

Lightweight Concrete Made With Waste Expanded Polypropylene-Based Aggregate and Synthetic Coagulated Amorphous Silica

Záleská¹

2018

Ceramics - Silikaty

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Recycled plastic aggregate can be used as an alternative material to produce lightweight concrete with low environmental impact. Polypropylene is one of the least recycled post-consumer plastics. In the present study we focused at waste expanded polypropylene (EPP) aggregate that is used for partial replacement of natural aggregate to produce lightweight cementbased composites. Coagulated silica was used as admixture for improvement of dispersion of EPP particles in the cementbased matrix. At first, natural and EPP aggregates were examined. Coagulated silica was characterized by SEM, EDS, XRF, particles size distribution and pozzolanic activity. Analysis of the microstructure of lightweight concrete was performed using an optical microscope, SEM imaging and EDS. For the developed lightweight concrete, basic physical, mechanical and hygric properties were examined. Specific attention was paid to thermal properties. The results show, using of plastic waste aggregate led to a sufficient mechanical resistance, whereas the thermal insulation performance of the developed concrete was markedly improved. Composite with incorporated PP waste aggregates was found to be prospective material for nonstructural applications in building industry, which allows the development of buildings with optimum energy performance as well as reduce the growing environmental impact of waste polymers and saving the natural aggregates.

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Section: Aggregatementioning

confidence: 94%

Lightweight Concrete Made With Waste Expanded Polypropylene-Based Aggregate and Synthetic Coagulated Amorphous Silica

Záleská¹

2018

Ceramics - Silikaty

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“…In this context, blended mortars represent alternative as they are able to combine the advantages of both aerial lime and hydraulic binders. Based on literature review, the most-studied mortars were those based on lime-cement blends [22,23,24,25]. However, use of Portland cement in renewal of historical masonry is strictly forbidden by culture heritage authorities due to its serious incompatibility with original materials that caused in recent restoration inventions significant failures and accelerated the damage of the restored monuments [11].…”

Section: Introductionmentioning

confidence: 99%

Ternary Blended Binder for Production of a Novel Type of Lightweight Repair Mortar

et al. 2019

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The goal of the paper was development and testing of a novel type of ternary blended binder based on lime hydrate, metakaolin, and biomass ash that was studied as a binding material for production of lightweight mortar for renovation purposes. The biomass ash used as one of binder components was coming from wood chips ash combustion in a biomass heating plant. The raw ash was mechanically activated by grinding. In mortar composition, wood chips ash and metakaolin were used as partial substitutes of lime hydrate. Silica sand of particle size fraction 0–2 mm was mixed from three normalized sand fractions. For the evaluation of the effect of biomass ash and metakaolin incorporation in mortar mix on material properties, reference lime mortar was tested as well. Among the basic physical characterization of biomass ash, metakaolin and lime hydrate, specific density, specific surface, and particle size distribution were assessed. Their chemical composition was measured by X-Ray fluorescence analysis (XRF), morphology was examined using scanning electron microscopy (SEM), elements mapping was performed using energy dispersive spectroscopy (EDS) analyser, and mineralogical composition was tested using X-Ray diffraction (XRD). For the developed mortars, set of structural, mechanical, hygric, and thermal properties was assessed. The mortars with ternary blended binder exhibited improved mechanical resistance, lower thermal conductivity, and increased water vapor permeability compared to the reference lime mortar. Based on good functional performance of the produced mortar, the tested biomass ash could potentially represent a novel sustainable alternative to other pozzolans commonly used in construction industry. Moreover, reuse of biomass ash in production of building materials is highly beneficial both from the environmental and economic reasons especially taking into account circular economy principles. The ternary blended binder examined in this paper can find use in both rendering and walling repair mortars meeting the requirements of culture heritage authorities and technical standards.

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“…In the analysis, carbon footprint and the amount of consumed energy were considered as two basic comparative criteria. The analysis was conducted following an original methodology published by Záleská et al [63]. The range of the analysis was reduced to the intermediate stage of material processing and the calculations were done for a functional unit of 1 t of a final LH–WBA blend.…”

Section: Methodsmentioning

confidence: 99%

Influence of Wood-Based Biomass Ash Admixing on the Structural, Mechanical, Hygric, and Thermal Properties of Air Lime Mortars

et al. 2019

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Mechanically-activated wood-based biomass ash (WBA) was studied as a potential active admixture for design of a novel lime-pozzolan-based mortar for renovation purposes. The replacement ratio of lime hydrate in a mortar mix composition was 5%, 10%, and 15% by mass. The water/binder ratio and the sand/binder ratio were kept constant for all examined mortar mixes. Both binder constituents were characterized by their powder density, specific density, BET (Brunauer–Emmett–Teller), and Blaine specific surfaces. Their chemical composition was measured by X-ray fluorescence analysis (XRF) and mineralogical analysis was performed using X-ray diffraction (XRD). Morphology of WBA was investigated by scanning electron microscopy (SEM) and element mapping was performed using an energy dispersive spectroscopy (EDS) analyzer. The pozzolanic activity of WBA was tested by the Chapelle test and assessment of the Portlandite content used simultaneous thermal analysis (STA). For the hardened mortar samples, a complete set of structural, mechanical, hygric, and thermal parameters was experimentally determined. The mortars with WBA admixing yielded similar or better functional properties than those obtained for traditional pure lime-based plaster, pointing to their presumed application as rendering and walling renovation mortars. As the Chapelle test, STA, and mechanical test proved high pozzolanity of WBA, it was classified as an alternative eco-efficient low-cost pozzolan for use in lime blend-based building materials. The savings in CO2 emissions and energy by the use of WBA as a partial lime hydrate substitute in mortar composition were also highly appreciated with respect to the sustainability of the construction industry.

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Biomass ash-based mineral admixture prepared from municipal sewage sludge and its application in cement composites

Cited by 50 publications

References 38 publications

Lightweight Concrete Made With Waste Expanded Polypropylene-Based Aggregate and Synthetic Coagulated Amorphous Silica

Lightweight Concrete Made With Waste Expanded Polypropylene-Based Aggregate and Synthetic Coagulated Amorphous Silica

Ternary Blended Binder for Production of a Novel Type of Lightweight Repair Mortar

Influence of Wood-Based Biomass Ash Admixing on the Structural, Mechanical, Hygric, and Thermal Properties of Air Lime Mortars

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