Flue gas desulfurization gypsum and coal fly ash as basic components of prefabricated building materials

Telesca, Antonio; Marroccoli, Milena; Calabrese, Daniela; Valenti, Gian Lorenzo; Montagnaro, Fabio

doi:10.1016/j.wasman.2012.10.022

Cited by 102 publications

(49 citation statements)

References 41 publications

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“…The ordinary Portland cement (OPC) and ecocement pastes at a w/c ratio (water/ cement ratio) of 0.4 and cured for 7-90 days. The hydration was stopped with absolute alcohol at specific hydration times (7,14,28,60, and 90 days) by grinding a small fraction of the paste sample. Prior to the XRD, DTA/TGA, and 29 Si NMR investigations.…”

Section: Methodsmentioning

confidence: 99%

“…Reusing and recycling waste materials can diversify products, reduce production costs, provide alternative raw materials for various industries, conserve nonrenewable resources, save energy, and, most importantly, improve public health [4]. For example, industrial waste and byproducts can be used as alternative raw materials in the manufacture of cement, partially supplanting fuel [5,6], conventional raw materials [7][8][9][10][11], and clinker [12][13][14].…”

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confidence: 99%

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Utilization of reduction slag and waste sludge for Portland cement clinker production

Lin

Hung³

et al. 2017

Env Prog and Sustain Energy

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The feasibility of recycling the reduction slag, limestone sludge, iron‐oxide sludge, and stone sludge produced in the manufacture of cement was investigated through compressive strength testing, differential thermal and thermogravimetric analysis, X‐ray diffraction, and 29Si nuclear magnetic resonance analysis. The major crystalline phases of ecocement clinkers, namely C3S, β‐C2S, C4AF, and C3A, were observed. C3S content decreased and β‐C2S and α‐C2S content increased in the reduction slag. The compressive strength of EcoA pastes (ecocement contain 78% of limestone sludge, 19.51% of stone sludge and 2.49% iron‐oxide sludge) was similar to that of commercial ordinary Portland cement. The Q0 (−70 ppm) species shifted to the Q1 (−80 ppm), and Q2 (−87 ppm) species during curing. The addition of stone sludge, iron‐oxide sludge, and limestone sludge had no negative effect on the hydration of the cement pastes. In contrast, the addition of reduction slag negatively affected the formation of clinker minerals. Cement samples with reduction slag content of 1–7 wt % had lower 28‐, 60‐, and 90‐day compressive strength than did the control mix. © 2017 American Institute of Chemical Engineers Environ Prog, 37: 669–677, 2018

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Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

Utilization of reduction slag and waste sludge for Portland cement clinker production

Lin

Hung³

et al. 2017

Env Prog and Sustain Energy

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“…Besides natural gypsum, it is possible to use gypsum resulting from other sources, such as red gypsum [13] and FGD gypsum [17][18][19][20], aiming to replace the traditional natural gypsum and contributing to more sustainable construction solutions by taking advantage of gypsum by-products. FGD gypsum has also been used in blended mortars and concrete by combining it with cement [21].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the performance of recycled textile fibres in the mechanical behaviour of a gypsum and cork composite material

Vasconcelos

Lourenço

Camões

et al. 2015

Cement and Concrete Composites

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“…But the landfill is not only the method of utilization of fly ash, besides it can be used for another useful application [20]. The use of waste products like fly ash in manufacturing of cement and mortar is an important and indisputable application [21]. That is why the Government of India issued a notification in the Gazette of India (1999) in relation to the use of fly ash for making bricks and promoting the utilization of fly ash in the manufacturing building materials as well as in construction activities within a specified radius of 50 km from coal or lignitebased thermal power plants [22].…”

Section: Introductionmentioning

confidence: 99%

Radon diffusion and exhalation from mortar modified with fly ash: waste utilization and benefits in construction

Kumar

Chauhan

2015

J Mater Cycles Waste Manag

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The utilization of fly ash in construction and cement industry increases from last few decades. But the question on utilization of fly ash for construction purpose was raised by many investigators as it causes a source of radioactive gas radon and increase in the gamma dose. In order to optimize the utilization of fly ash in cement with additional benefit of reducing radon diffusion coefficient and exhalation rate were studied. The compressive strength of mortar is the key factor for cement industry, thus it should not be sacrificed for utilization of fly ash. Keeping this in mind, compressive strength, porosity, radon diffusion and exhalation rate study was carried out through the mortar reinforced with the blending of fly ash with cement. The results indicated decrease in effective radon diffusion coefficient from 0.363 9 10 -7 to 0.013 9 10 -7 m 2 /s for fly ash up to 50 % substitution. The addition of fly ash in cement first decreased the radon exhalation rates up to 25 % substitution then increases and similar trends were observed for compressive strength. Thus, the addition of fly ash exerts a positive effect up to a 20-25 % replacement beyond which it may introduce negative effect depending upon the level of substitution.

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Flue gas desulfurization gypsum and coal fly ash as basic components of prefabricated building materials

Cited by 102 publications

References 41 publications

Utilization of reduction slag and waste sludge for Portland cement clinker production

Utilization of reduction slag and waste sludge for Portland cement clinker production

Evaluation of the performance of recycled textile fibres in the mechanical behaviour of a gypsum and cork composite material

Radon diffusion and exhalation from mortar modified with fly ash: waste utilization and benefits in construction

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