Freeze–thaw resistance of blended cements containing calcined paper sludge

Vegas, Íñigo; Urreta, J.; Frías, Moisés; García, Ramón Lanza

doi:10.1016/j.conbuildmat.2009.02.034

Cited by 89 publications

(44 citation statements)

References 25 publications

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“…This is in contrast to previous research which has used commercial EPS spheres rather than waste EPS. In addition, up to 80% by mass of Portland cement was replaced by PSA, whereas in previous research only up to 20% of cement was replaced by PSA (49,50).…”

Section: Introductionmentioning

confidence: 74%

Lightweight mortars containing expanded polystyrene and paper sludge ash

Ferrándiz-Mas

Bond

García-Alcocel

et al. 2014

Construction and Building Materials

125

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The objective of this research was to develop lightweight cement mortars with good thermal-insulation properties by incorporating expanded polystyrene (EPS) and paper sludge ash (PSA), both of which are problematic waste materials. The mortars formed had low thermal conductivity and low bulk density compared to control samples. Ground EPS produced lower thermal conductivity samples than powdered EPS. Resource efficient mortars containing up to 20% PSA, and 60% of EPS are considered suitable for use in rendering and plastering applications.

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Section: Introductionmentioning

confidence: 74%

Lightweight mortars containing expanded polystyrene and paper sludge ash

Ferrándiz-Mas

Bond

García-Alcocel

et al. 2014

Construction and Building Materials

125

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“…The alkaline oxides (Na 2 O + K 2 O) were approximately 2.46% in the very fine-grade samples and 2.87% in the mining refuse. Higher concentrations of SO 3 were found in the fine-grade raw tailings (0.92%), and the lowest concentrations were once again found in the coal-refuse sample (0.27%). Finally, concentrations of P 2 O 5 were at their highest in the very fine-grade samples (0.26%) and lowest in the coal refuse (0.13%).…”

Section: Raw Materialsmentioning

confidence: 92%

“…Hence, there is a need to diversify the sources and the supply of pozzolanic mineral additives for use in the manufacture of cements and related materials. The evaluation of industrial wastes and byproducts form the main plank of these investigations, thanks to which pozzolanic fractions are now specified in a range of cement standards [1][2][3][4][5]. Thus, a central research topic, core to numerous investigations [6][7][8][9][10][11][12], concerns the activation of clayey materials, principally in the form of kaolinite (K), from which metakaolin (MK) is generated by the controlled activation of natural kaolinite.…”

Section: Introductionmentioning

confidence: 99%

Coal-Mining Tailings as a Pozzolanic Material in Cements Industry

et al. 2018

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Abstract:The generation of enormous volumes of mine-tailing waste is standard practice in the mining industry. Large quantities of these tailings are also sources of kaolinite-rich materials that accumulate in slag heaps, causing significant environmental degradation and visual impacts on the landscape. The consequences of coal refuse dumped in slagheaps calls for the study of eco-innovative solutions and the assessment of waste types. Moreover, the environmental benefits of reusing large amounts of contaminated waste are also evident. Hence, the objective of this investigation is to expand current knowledge of new siliceous-aluminium minerals and their pozzolanic activity. Four raw tailing samples are characterized to determine their chemical (by ICP/MS analysis), morphological (by SEM/EDX analysis), and mineralogical (by XRD analysis) compositions prior to their thermal activation that transforms the inert wastes at various temperatures into materials with cementitious properties. The results of XRD analysis following activation confirmed that the kaolinite content is fully transformed into metakaolinite. The coal refuse samples presented sufficiently reliable levels of pozzolanic activity for use as additives in industrial cements.

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“…Paper sludge (Vegas et al 2009;Goñi et al 2014;Vegas et al 2014) is a product of the papermaking process in waste water treatment, which is the crucial processing method in papermaking industry after finishing the paper production. Paper sludge has a high output (every ton of recycled paper generates approximately 700 kg of sludge containing 65% moisture content) with limited uses.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Adaptability of Paper Sludge with Wood Fiber in Cement-Based Insulation Mortar

Wang

Chen

et al. 2016

BioResources

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Paper sludge generated from the paper industry is classified as solid waste, comprising primarily wood fiber with excellent toughness and CaCO3 with low thermal conductivity. The purpose of this work was to investigate the adaptability of paper sludge with wood fiber into cementbased insulation mortar. The addition of paper sludge with wood fiber was found to be beneficial for optimizing the performance of cement-expanded polystyrene (EPS)/paper sludge (CEP) mortar. In detail, the addition of paper sludge with low fiber content in the range of 2.5% to 7.5% improved the toughness and softening coefficient of CEP mortar. In comparison, an increase of wood fiber content notably improved the properties of CEP mortar when its addition level reached 15%. Additionally, paper sludge with different fiber contents decreased the thermal conductivity of CEP mortar, ranging from 0.0897 to 0.0885 W/(m·K). In conclusion, paper sludge with wood fiber exhibited good adaptability in CEP mortar.

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Freeze–thaw resistance of blended cements containing calcined paper sludge

Cited by 89 publications

References 25 publications

Lightweight mortars containing expanded polystyrene and paper sludge ash

Lightweight mortars containing expanded polystyrene and paper sludge ash

Coal-Mining Tailings as a Pozzolanic Material in Cements Industry

Investigation of the Adaptability of Paper Sludge with Wood Fiber in Cement-Based Insulation Mortar

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