Evaluation of Industrial By-Products as Sustainable Pozzolanic Materials in Recycled Aggregate Concrete

Alnahhal, Mohammed Fouad; Alengaram, U. Johnson; Jumaat, Mohd Zamin; Alqedra, Mamoun; Mo, Kim Hung; Sumesh, Mathialagan

doi:10.3390/su9050767

Cited by 68 publications

(30 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…By 2025, around 3.5 billion tonnes of carbon dioxide is foreseen to be released to the atmosphere during cement production. One solution for more sustainable production can be harvesting locally available end-of-life (EOL) and/or recyclable materials [1,2]. Global quarry practices to obtain coarse aggregates have substantially modified the ecological equilibrium.…”

Section: Introductionmentioning

confidence: 99%

“…Meanwhile, a lot of EOL materials are disposed of in open fields as landfill. One example of this kind of waste is construction and demolition debris with enormous potential for recycling as a profitable recycled concrete aggregate (RA) [2,3]. RA can be found in almost all developed and developing countries as a result of the demolition of older buildings and structures.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

End-of-Life Materials Used as Supplementary Cementitious Materials in the Concrete Industry

et al. 2020

View full text Add to dashboard Cite

A sustainable solution for the global construction industry can be partial substitution of Ordinary Portland Cement (OPC) by use of supplementary cementitious materials (SCMs) sourced from industrial end-of-life (EOL) products that contain calcareous, siliceous and aluminous materials. Candidate EOL materials include fly ash (FA), silica fume (SF), natural pozzolanic materials like sugarcane bagasse ash (SBA), palm oil fuel ash (POFA), rice husk ash (RHA), mine tailings, marble dust, construction and demolition debris (CDD). Studies have revealed these materials to be cementitious and/or pozzolanic in nature. Their use as SCMs would decrease the amount of cement used in the production of concrete, decreasing carbon emissions associated with cement production. In addition to cement substitution, EOL products as SCMs have also served as coarse and also fine aggregates in the production of eco-friendly concretes.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

End-of-Life Materials Used as Supplementary Cementitious Materials in the Concrete Industry

et al. 2020

View full text Add to dashboard Cite

show abstract

“…It would also add economic value to the wheat straw, thus creating an incentive for the farmer to refrain from open burning of wheat straw. Among the other crop residue, successful investigations have been done on rice husk ash, bagasse ash, etc., for their use in cement based composites [33][34][35][36][37][38]. However, as per the authors' knowledge, until now, no systematic study has been devised to assess the most favorable conditions of controlled burning and grinding for production of wheat straw ash (WSA) that best-suited to its use in cement-based composites.…”

Section: Introductionmentioning

confidence: 99%

Environmentally Friendly Utilization of Wheat Straw Ash in Cement-Based Composites

et al. 2018

View full text Add to dashboard Cite

The open burning of biomass residue constitutes a major portion of biomass burning and leads to air pollution, smog, and health hazards. Various alternatives have been suggested for open burning of crop residue; however, each of them has few inherent drawbacks. This research suggests an alternative method to dispose wheat straw, i.e., to calcine it in a controlled environment and use the resulting ash as a replacement of cement by some percentage in cement-based composites. When wheat straw, an agricultural product, is burned, it is very rich in SiO 2 , which has a pozzolanic character. However, the pozzolanic character is sensitive to calcination temperature and grinding conditions. According to the authors' best knowledge, until now, no systematic study has been devised to assess the most favorable conditions of burning and grinding for pozzolanic activity of wheat straw ash (WSA). Hence, a systematic experimental program was designed. In Phase I, calcination of WS was carried out at 500 • C, 600 • C, 700 • C, and 800 • C for 2 h. The resulting ashes were tested for color change, weight loss, XRD, XRF, Chapelle activity, Fratini, and pozzolanic activity index (PAI) tests. From test results, it was found that beyond 600 • C, the amorphous silica transformed into crystalline silica. The WSA calcined at 600 • C was found to satisfy Chapelle and Fratini tests requirements, as well as the PAI requirement of ASTM at 28 days. Therefore, WSA produced at 600 • C (WSA600) showed the best pozzolanic performance. In Phase II, WSA600 was ground for various intervals (15-240 min). These ground ashes were tested for SEM, Blaine fineness, Chapelle activity, Fratini, and PAI tests. From test results, it was observed that after 120 min of grinding, there was an increase of 48% in Blaine surface area, with a consequence that WSA-replaced cement cubes achieved a compressive strength almost similar to that of the control mix. Conclusively, wheat straw calcined at 600 • C and ground for 120 min was found to be the most effective way to use pozzolanic material in cement-based composites. The addition of WSA in cement-based composites would achieve manifold objectives, i.e., aiding in the production of environmentally friendly concrete, the use of wheat straw as fuel for electricity production, and adding economic value to wheat straw.

show abstract

“…In particular, the sustainability of cities is currently a topic of great concern [3,4]. As sustainable development becomes more and more important, research related to the sustainability of civil construction has increased significantly [5,6]. Therefore, there have been many related studies concerning the development of alternative sources of clay bricks .…”

Section: Introductionmentioning

confidence: 99%

Properties of Fired Bricks Incorporating TFT-LCD Waste Glass Powder with Reservoir Sediments

Tang¹

2018

Sustainability

View full text Add to dashboard Cite

Abstract:In view of increasing concerns over nonrenewable resource depletion and waste management, this study aimed to apply the Taguchi optimization technique to determine the process conditions for producing bricks by incorporating thin-film transition liquid crystal display (TFT-LCD) waste glass powder with reservoir sediments. An orthogonal array L 16 (4 5 ) was adopted, which consisted of five controllable four-level factors (i.e., cullet content, drying method, preheat time, sintering temperature, and error). Moreover, the analysis of variance method was used to explore the effects of the experimental factors on the density, water absorption, shrinkage ratio, loss on ignition, porosity, and compressive strength of the fired bricks. The microstructures of the fired specimens were investigated by scanning electron microscopy. Then, large-scale production techniques for fired bricks containing recycled TFT-LCD glass cullet and reservoir sediments were developed in a commercially available tunnel kiln. The test results showed that the structure of the fired specimen was loose at a sintering temperature ranging from 900 to 950 • C. However, the fired specimen showed a significant densification at the sintering temperature of 1050 • C. In addition, the Taguchi method was found to be a feasible approach for optimizing the process condition of bricks using recycled TFT-LCD glass cullet and reservoir sediments and it significantly reduced the number of tests. Further, the characteristics of fired bricks developed in the tunnel kiln were in compliance with Chinese National Standards class I building bricks criteria.

show abstract

Evaluation of Industrial By-Products as Sustainable Pozzolanic Materials in Recycled Aggregate Concrete

Cited by 68 publications

References 56 publications

End-of-Life Materials Used as Supplementary Cementitious Materials in the Concrete Industry

End-of-Life Materials Used as Supplementary Cementitious Materials in the Concrete Industry

Environmentally Friendly Utilization of Wheat Straw Ash in Cement-Based Composites

Properties of Fired Bricks Incorporating TFT-LCD Waste Glass Powder with Reservoir Sediments

Contact Info

Product

Resources

About