New waste-based supplementary cementitious materials: Mortars and concrete formulations

Acordi, J.; Luza, André Luís; Fabris, Débora Cristina Niero; Raupp-Pereira, F.; Noni, Agenor De; Montedo, Oscar Rubem Klegues

doi:10.1016/j.conbuildmat.2019.117877

Cited by 20 publications

(16 citation statements)

References 34 publications

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“…This granulometric distribution can be attributed to the calcination of the residue at high temperatures and its high hardness during milling. Similar granulometric distribution ranges have been observed for pozzolans and other SCMs such as calcined clays and limestone fines [43,49,50]. The refractory waste in this study had a specific surface area of 3.44 m 2 /g, which was significantly higher than the specific surface area of cement (1.94 m 2 /g), both measured using the same technique (BET) [51].…”

Section: Resultssupporting

confidence: 80%

Evaluation of the use of silica-alumina refractory waste as a supplementary cementitious material

et al. 2021

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The use of supplementary cementitious materials (SMCs) is one of the three essential factors for the sustainability of the cement industry. To reduce CO 2 emissions, several studies have introduced new methods for the utilization of industrial wastes such as the addition into cementitious materials. The objectives of this study were to chemically and physically characterize refractory ceramic industry waste and determine its viability as an SMC. The pozzolanic characteristics or SMC characteristics of the refractory waste were investigated using standard tests. The results revealed that the refractory waste was mainly composed of Al 2 O 3 and SiO 2 . The mineralogical analysis revealed that the mullite was the major phase of the waste, followed by small amounts of cristobalite and quartz phases. The results of the modified Chapelle test and pozzolanic activity index with lime after 7 days indicated that the waste did not meet the minimum pozzolanicity required by the standard. However, the waste improved the mechanical resistance of the cement specimens containing the waste after 28 days compared with the reference sample, indicating the promising potential of the material for this application. This result indicated that the refractory waste shows a filler type effect, and thus, can be employed as an SCM.

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Section: Resultssupporting

confidence: 80%

Evaluation of the use of silica-alumina refractory waste as a supplementary cementitious material

et al. 2021

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“…It was noted that wood ash contained 6.69% of SiO 2 , Al 2 O 3 , and Fe 2 O 3 and did not meet one of the minimum chemical requirements to be classified as pozzolanic material [37]. Other authors [38], who also used wood ash, found other parameters that did not meet the requirements of the NBR 12653 standard [37]: the loss on ignition of 23.40%, a value greater than 10%. The hydraulic activity of wood ash can be analyzed by the SiO 2 and CaO contents.…”

Section: Physicochemical Characterization Of the Materials Used In Th...mentioning

confidence: 99%

Study for the incorporation of wood ash in soil-cement brick

et al. 2022

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This study aimed to produce soil-cement brick with wood ash incorporation coming from the textile industry. The wood ash was a partial substitute for soil and cement in the manufacture of bricks. 7 formulations were made with different proportions of substitution: 10%, 20%, and 30%. It was noticed that the substitution of cement by wood ash in 10% resulted in brick with enhanced properties, showing a 20% increase for compressive strength and a reduction of 44% for mass loss, thus, with higher durability and a reduction of water absorption of 3%, when comparing to the reference brick (soil-cement). It was shown that the reuse of wood ash in the production of soil-cement bricks is a viable and sustainable option, as it is an alternative for the destination of the waste and a reduction in the consumption of Portland cement, which generates a high volume of carbon dioxide (CO 2 ) during its production.

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“…In the amorphous phase, silica is necessary to initiate and maintain pozzolanic activity. Since the pozzolan reaction only occurs on the silica particle surface, the specific surface area is the most significant factor in the effectiveness of pozzolanic activity [ 71 , 72 , 73 ]. A study has been conducted on fine rock wool particles to facilitate the early hydration of cement, however, the result showed a prolonged dormant period that is undesirable [ 51 ].…”

Section: Repurposing As Fillers In Compositesmentioning

confidence: 99%

Waste Mineral Wool and Its Opportunities—A Review

et al. 2021

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Massive waste rock wool was generated globally and it caused substantial environmental issues such as landfill and leaching. However, reviews on the recyclability of waste rock wool are scarce. Therefore, this study presents an in-depth review of the characterization and potential usability of waste rock wool. Waste rock wool can be characterized based on its physical properties, chemical composition, and types of contaminants. The review showed that waste rock wool from the manufacturing process is more workable to be recycled for further application than the post-consumer due to its high purity. It also revealed that the pre-treatment method—comminution is vital for achieving mixture homogeneity and enhancing the properties of recycled products. The potential application of waste rock wool is reviewed with key results emphasized to demonstrate the practicality and commercial viability of each option. With a high content of chemically inert compounds such as silicon dioxide (SiO2), calcium oxide (CaO), and aluminum oxide (Al2O3) that improve fire resistance properties, waste rock wool is mainly repurposed as fillers in composite material for construction and building materials. Furthermore, waste rock wool is potentially utilized as an oil, water pollutant, and gas absorbent. To sum up, waste rock wool could be feasibly recycled as a composite material enhancer and utilized as an absorbent for a greener environment.

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New waste-based supplementary cementitious materials: Mortars and concrete formulations

Cited by 20 publications

References 34 publications

Evaluation of the use of silica-alumina refractory waste as a supplementary cementitious material

Evaluation of the use of silica-alumina refractory waste as a supplementary cementitious material

Study for the incorporation of wood ash in soil-cement brick

Waste Mineral Wool and Its Opportunities—A Review

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