Avaliação da aplicação de cinzas pesadas de termelétrica em blocos intertravados de concreto para pavimentos

Silva, Webert Brasil Cirilo da; Barroso, Suelly Helena de Araújo; Cabral, Antônio Eduardo Bezerra

doi:10.1590/s1517-707620200001.0895

Cited by 3 publications

(2 citation statements)

References 3 publications

(7 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Thermoelectric Power Plants "Pecem I" and "Pecem II" in Ceara, Brazil, produced 710 tons of ash approximately per day from 2015 to 2018 (ARAUJO, 2016;VASCONCELOS, 2018;ALCANTARA, 2018). Then, regarding the reuse of by-products, Silva (2020) and Alcantara (2018) in Brazil and Ganjian, Jalull, and Sadeghi-Pouya (2015) in the UK studied the use of coal bottom ash (CBA) from thermoelectric power plants in CPB manufacturing.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the manufacturing of concrete paving blocks with by-products from thermoelectric power plant

Silva,

Barroso,

Picado-Santos

et al. 2024

Cad. Pedagógico

View full text Add to dashboard Cite

The key factor in constructing urban roads applying interlocking concrete block pavement (ICBP) is to employ an appropriate design method for better effectiveness. Concrete paving blocks (CPB) can also be manufactured using industrial by-products. Then, this paper aims to analyze CPB with coal bottom ash (CBA) from a Thermoelectric Power Plant through mechanical characterization and design methods for ICBP. To this end, tests, such as void index, water absorption, compressive strength, and elasticity modulus, were done on CPB for each mixture. Furthermore, empirical and mechanistic-empirical design methods for ICBP were applied. Then, four dry concrete mixtures (two with CBA and two without CBA) were designed with two water/cement ratios (0.63 and 0.73) to produce rectangular CPB measuring 20 cm × 10 cm × 8 cm (length × width × thickness) by a vibro-press machine. Furthermore, ICBP sections were designed, applying six simulations from empirical and mechanistic-empirical design methods. The results showed that the mixtures A73 and B73 with more water, i.e., water/cement ratio of 0.73, presented higher characteristic compressive strength at 28 days (25.34 MPa and 15.88 MPa, respectively) than the other mixes A63 and B63 with less water, i.e., water/cement ratio of 0.63 (these two mixes showed 15.85 MPa). Furthermore, the CPB application for bike paths or parking areas was allowed according to the Australian specification of 15 MPa for compressive strength test. Also, all ICBP sections from the mechanistic-empirical design required approximately 24.9% fewer materials for the sub-base layer than the empirical process. Finally, the CPB application is possible for areas with light traffic, and the ICBP technology was more feasible with the mechanistic-empirical design method.

show abstract

Section: Introductionmentioning

confidence: 99%

Analysis of the manufacturing of concrete paving blocks with by-products from thermoelectric power plant

Silva,

Barroso,

Picado-Santos

et al. 2024

Cad. Pedagógico

View full text Add to dashboard Cite

show abstract

“…The exudates with the solubilized extract were able to prove their ecotoxic effects [23,24], carry out physical-chemical analyses to verify the compounds [23][24][25][26][27][28][29][30][31][32][33] and classify the waste from which these compounds originated according to their dangerousness and solubility [26,[28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Prediction of Leachate Characteristics via an Analysis of the Solubilized Extract of the Organic Fraction of Domestic Solid Waste from the Municipality of Belém, PA

Pereira,

da Costa Assunção,

da Silva

et al. 2023

Sustainability

View full text Add to dashboard Cite

This work aimed to predict the physical–chemical characteristics of leachate according to the analysis of the solubilized extract from urban household solid waste (UHSW), on a laboratory scale, in the city of Belém/PA, Brazil. The neighborhoods where the waste was collected were sectorized based on geographic and socioeconomic data, with family income as the main parameter. After collection, the material was sent to the segregation area, where a gravimetric analysis of the UHSW was performed and fractions (paper, cardboard, Tetra Pak, rigid plastic, malleable plastic, metals, glass, organic matter, sanitary waste, fabrics and rejects) were segregated. After the gravimetric characterization, it was found that the highest average proportions were 55.57% organic matter, 14.26% sanitary waste and 9.97% malleable plastic. The organic fraction was selected and subjected to drying, crushing, sieving and packaging pretreatment, and then the solubilized extract of this fraction was obtained according to NBR No. 10.006/2004 of the Brazilian Association of Technical Standards. In the analyses of the solubilized extract, values for total nitrogen (201.80 to 359.90 mg·L−1), ammonia nitrogen (161 to 289 mg·L−1), nitrate (10 to 40 mg·L−1) and chemical oxygen demand were obtained (28,701 mg·L−1 to 38,608 mg·L−1), indicating the similarity of the waste solubilization conditions to those of leachate from landfills, in addition to being in noncompliance with environmental and health legislation, thus making it necessary to have an efficient waste management system, which avoids the release of waste into the environment that would result in environmental impacts similar to those of leachate contact with the environment.

show abstract

Effective adsorptive removal of textile pollutant using coal bottom ash with high surface area obtained by alkaline fusion route

Drumm

Franco

Grassi

et al. 2021

Environmental Technology

View full text Add to dashboard Cite

Avaliação da aplicação de cinzas pesadas de termelétrica em blocos intertravados de concreto para pavimentos

Cited by 3 publications

References 3 publications

Analysis of the manufacturing of concrete paving blocks with by-products from thermoelectric power plant

Analysis of the manufacturing of concrete paving blocks with by-products from thermoelectric power plant

Prediction of Leachate Characteristics via an Analysis of the Solubilized Extract of the Organic Fraction of Domestic Solid Waste from the Municipality of Belém, PA

Effective adsorptive removal of textile pollutant using coal bottom ash with high surface area obtained by alkaline fusion route

Contact Info

Product

Resources

About