Prefabricated building elements based on FGD gypsum and ashes from coal-fired electric generating plants

Coppola, Luigi; Belz, G.; Dinelli, G.; Collepardi, M.

doi:10.1007/bf02486365

Cited by 26 publications

(16 citation statements)

References 2 publications

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“…[115][116][117][118][119][120] Moreover, a correlation between the elastic modulus and compressive strength of recycled-aggregate concrete (RAC) was found by Corinaldesi,116 showing that 15% lower elastic modulus is achieved by using 30% recycled aggregates, while tensile strength is reduced by 10% if the same concrete strength class is achieved by replacing 30% virgin aggregates with recycled concrete particles. [115][116][117][118][119]120 In terms of drying shrinkage, lower strains are detected, especially for earlier curing times. 115,116,121 Concerning time-dependent characteristics, creep behavior is more influenced by the presence of recycled aggregates than shrinkage.…”

Section: Recycled Aggregates In Concretementioning

confidence: 99%

Binders alternative to Portland cement and waste management for sustainable construction – Part 2

Coppola

Bellezze

Belli

et al. 2018

Journal of Applied Biomaterials & Functional Materials

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The paper represents the "state of the art" on sustainability in construction materials. In Part 1 of the paper, issues related to production, microstructures, chemical nature, engineering properties, and durability of mixtures based on binders alternative to Portland cement were presented. This second part of the paper concerns the use of traditional and innovative Portland-free lime-based mortars in the conservation of cultural heritage, and the recycling and management of wastes to reduce consumption of natural resources in the production of construction materials. The latter is one of the main concerns in terms of sustainability since nowadays more than 75% of wastes are disposed of in landfills.

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Section: Recycled Aggregates In Concretementioning

confidence: 99%

Binders alternative to Portland cement and waste management for sustainable construction – Part 2

Coppola

Bellezze

Belli

et al. 2018

Journal of Applied Biomaterials & Functional Materials

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“…Resource recovery of the FGD process has been emphasized for many years, especially for FGD gypsum [ 6 ]. FGD gypsum has been made into prefabricated building elements such as bricks, blocks, and wallboards [ 7 ], but some mercury is likely to be embedded in FGD gypsum due to the wet FGD scrubber [ 8 ]. FGD gypsum also has been used in Portland cement [ 9 ], calcium aluminate cement [ 10 ], calcium-sulfate-bearing material [ 11 ], and various binders of blended cement [ 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

Compressive Strength and Durability of FGD Gypsum-Based Mortars Blended with Ground Granulated Blast Furnace Slag

2020

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One new flue gas desulfurization (FGD) gypsum-based binder is attempted in this article, which is made up of FGD gypsum, ground granulated blast furnace slag (GGBS) and ordinary Portland cement (OPC). Influences of raw materials, chemical activators, and curing conditions on the compressive strength of this new binder-based mortar, as well as its durability performances and microscopic characteristics, are investigated in consideration of utilizing FGD gypsum as much as possible. Results show that the compressive strength of this new binder-based mortar under normal curing conditions could increase along with GGBS dosages from three days to 90 days. The compressive strength of one selected mix proportion (FG-4550), which contains the highest dosage of FGD gypsum (45 wt.%), is much the same as those containing the highest dosage of GGBS. A better compressive strength of FG-4550 under normal curing conditions could be gained if the fineness of GGBS is improved. The activated effect of CaCl2 on the compressive strength of FG-4550 is superior to that of Ca(OH)2 under steam curing conditions. FG-4550 shows a good capacity for resistance to water, a low shrinkage ratio, but poor compressive strength after 30 freeze-thaw cycles. Based on the mineralogy of X-ray diffraction, the morphology of scanning electron microscopy and the pore diameter distributions of 1H nuclear magnetic resonance, the compressive strength of this FGD gypsum-based mortar mainly depends on clusters of ettringite.

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“…Different strategies can be identified along these three routes to make the concrete sector more environmentally friendly ( Figure 2): (a) using alternative fuels and raw materials to reduce CO 2 emissions to produce Portland cement; (b) replacing Portland cement with low-carbon supplementary cementitious materials (SCMs); developing alternative low-carbon binders (alkaliactivated materials, geopolymers, and calcium sulfoaluminate cements); and (c) reducing natural resource consumption through to waste management and recycling. [1][2][3]4 Part 1 of this review-the present paper-deals with use of binders other than Portland cement. Part 2 will be dedicated to waste management and recycling in mortar and concrete production.…”

Section: Introductionmentioning

confidence: 99%

Binders alternative to Portland cement and waste management for sustainable construction—part 1

Coppola

Bellezze

Belli

et al. 2018

Journal of Applied Biomaterials & Functional Materials

View full text Add to dashboard Cite

show abstract

Prefabricated building elements based on FGD gypsum and ashes from coal-fired electric generating plants

Cited by 26 publications

References 2 publications

Binders alternative to Portland cement and waste management for sustainable construction – Part 2

Binders alternative to Portland cement and waste management for sustainable construction – Part 2

Compressive Strength and Durability of FGD Gypsum-Based Mortars Blended with Ground Granulated Blast Furnace Slag

Binders alternative to Portland cement and waste management for sustainable construction—part 1

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