Recycled coarse aggregates from pelletized unused concrete for a more sustainable concrete production

Bassani, Marco; Garcia, J.; Meloni, Flavia; Volpatti, Giovanni; Zampini, Davide

doi:10.1016/j.jclepro.2019.01.338

Cited by 42 publications

(12 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The mixed powders were put in a disk pelletizer with a diameter of 80 cm and then pelletized by spraying water. Previous studies noted that disk inclination angle and disk revolution speed affect the efficiency of pelletization [ 28 , 29 ] and after several adjustments were made, the best disk inclination angle and revolution speed were found to be 34 RPM and 42°, respectively, as illustrated in Figure 4 .…”

Section: Methodsmentioning

confidence: 88%

Use of Coal Bottom Ash and CaO-CaCl2-Activated GGBFS Binder in the Manufacturing of Artificial Fine Aggregates through Cold-Bonded Pelletization

et al. 2020

View full text Add to dashboard Cite

This study investigated the use of coal bottom ash (bottom ash) and CaO-CaCl2-activated ground granulated blast furnace slag (GGBFS) binder in the manufacturing of artificial fine aggregates using cold-bonded pelletization. Mixture samples were prepared with varying added contents of bottom ash of varying added contents of bottom ash relative to the weight of the cementless binder (= GGBFS + quicklime (CaO) + calcium chloride (CaCl2)). In the system, the added bottom ash was not simply an inert filler but was dissolved at an early stage. As the ionic concentrations of Ca and Si increased due to dissolved bottom ash, calcium silicate hydrate (C-S-H) formed both earlier and at higher levels, which increased the strength of the earlier stages. However, the added bottom ash did not affect the total quantities of main reaction products, C-S-H and hydrocalumite, in later phases (e.g., 28 days), but simply accelerated the binder reaction until it had occurred for 14 days. After considering both the mechanical strength and the pelletizing formability of all the mixtures, the proportion with 40 relative weight of bottom ash was selected for the manufacturing of pilot samples of aggregates. The produced fine aggregates had a water absorption rate of 9.83% and demonstrated a much smaller amount of heavy metal leaching than the raw bottom ash.

show abstract

Section: Methodsmentioning

confidence: 88%

Use of Coal Bottom Ash and CaO-CaCl2-Activated GGBFS Binder in the Manufacturing of Artificial Fine Aggregates through Cold-Bonded Pelletization

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Quarries that are often utilised in the processing of igneous, sedimentary, and metamorphic rock deposits are often utilised to produce natural aggregates [29]. The aggregate makes up around 70-80% of the overall concrete volume.…”

Section: Introductionmentioning

confidence: 99%

“…These environmental degradations can also disrupt certain animal habitats, causing them to relocate, which in turn destroys the current ecosystem. However, this is an important issue because cement is often listed as a crucial material due to the large volume needed in building energy technologies and its high effect on the environment [28].Quarries that are often utilised in the processing of igneous, sedimentary, and metamorphic rock deposits are often utilised to produce natural aggregates [29]. The aggregate makes up around 70-80% of the overall concrete volume.…”

mentioning

confidence: 99%

Cockle Shell as Mixing Ingredient in Concrete: A Review

2021

View full text Add to dashboard Cite

The demand for the population is boosting the production of edible and non-edible products that produce by-products that result in emissions being thrown as waste. The successful cockle trade also creates vestiges of cockle shell that are thrown away as waste. Despite the effects of climate change, industrial activity including calcareous and granite mining to satisfy the need for cement and concrete production, respectively, cannot be prevented as more structures are developed worldwide. The mechanical properties of concrete containing crushed cockle shell as partial fine aggregate, coarse aggregate and cement replacement were examined and reported in this paper. Cockle shell powder was used as cement replacement up to 75%. To sum up, the use of cockle shell is an appealing option for the construction industry and sustainable green climate.

show abstract

“…The scarcity of natural resources has forced the building sector to find alternative solutions. To attain more sustainable construction, the consumption of natural resources should be minimized to a larger extent [9]. Besides 2 of 15 the fly ash [10], marble powder [11], bottom ash [6], and rice husk ash [12] are commonly utilized as cementitious materials to improve the fresh and hardened properties of the composites.…”

Section: Introductionmentioning

confidence: 99%

Physical, Mechanical and Durability Performance of Pastes Containing Carbon Fiber

Atiyeh¹,

Aydın²

2020

Preprint

View full text Add to dashboard Cite

The damage caused by global warming is rapidly increasing, and its adverse effects become more evident with each passing day. Although it is known that the use of alternative binder materials in concrete would decrease this negative effect, reluctance to new composites continues. Waste use plays a vital role in sustainability studies. In this study, pure cement paste was prepared and enriched with carbon fiber. This study investigated the wide range of volume fraction of carbon fiber in cement-based composites. Two different industrial wastes, marble dust, and bottom ash were chosen and mixed with cement and four different (0.3%, 0.75%, 1.5%, and 2.5%) carbon fiber volume fractions. Based on physical, mechanical, and durability tests at 7, 28, and 56-days of curing, the composites were resistant to sulfate and seawater attack. The 0.75% carbon fiber addition seems to be an optimum volume percentage beyond which both physical and mechanical properties were adversely affected. The composites with 0.75% carbon fiber have reached 48.4 MPa and 47.2 MPa at 56-days of curing for marble dust and bottom ash mixture groups, respectively.

show abstract

Recycled coarse aggregates from pelletized unused concrete for a more sustainable concrete production

Cited by 42 publications

References 15 publications

Use of Coal Bottom Ash and CaO-CaCl2-Activated GGBFS Binder in the Manufacturing of Artificial Fine Aggregates through Cold-Bonded Pelletization

Use of Coal Bottom Ash and CaO-CaCl2-Activated GGBFS Binder in the Manufacturing of Artificial Fine Aggregates through Cold-Bonded Pelletization

Cockle Shell as Mixing Ingredient in Concrete: A Review

Physical, Mechanical and Durability Performance of Pastes Containing Carbon Fiber

Contact Info

Product

Resources

About