Influence of brick waste and brick waste fines as fine aggregate on the properties of paver blocks – Preliminary investigation

D, Sai Rahul; Reddy, Sai Vikas; Tarun, N; Basutkar, S. M.; Wali, Ravikiran S.; Renukadevi, M. V.

doi:10.1016/j.matpr.2020.09.312

Cited by 8 publications

(8 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, in line with the results of previous research [ 50 , 53 ], the strength decreased to a varying level as a result of the RAs’ content. The decrease in strength values could be explained by a worse aggregate–cement bonding due to the presence of traces of other components of the CDW adhered to the RAs’ surface.…”

Section: Resultssupporting

confidence: 91%

Recycled Aggregates from Construction and Demolition Waste in the Manufacture of Urban Pavements

et al. 2021

View full text Add to dashboard Cite

Construction and Demolition Waste (CDW) is among the largest waste streams in the world. Therefore, within the Circular Economy concept, there is a growing interest in its reuse. The purpose of this work was to study the use of recycled aggregates (RAs) obtained by a specific separation method from CDW, replacing natural aggregates (NAs) in the manufacture of precast concrete elements, such as kerbstones and paver blocks. The physical and technological properties of precast products formulated with RAs were analysed in accordance with current regulations, comparing them with those of commercial products manufactured with NAs. The results indicated that partial or total substitution of NAs by RAs increased the water absorption and apparent porosity values of the precast elements while reducing the bulk density and compressive strength. However, all units manufactured with RAs showed breaking load values higher than the minimum required by EN 1338 and, in some cases, slightly higher average tensile strength values than the reference material. In addition, some of the compositions including RAs gave rise to pieces that, according to their flexural strength, were classified as class 1 and marked S in accordance with EN 1340. According to abrasion resistance, in most cases, the precast elements are classified as Class 4 and I (≤20 mm). Finally, precast concrete produced from RAs satisfies the tolerance requirements for classification as class 3 (≤1.5 kg m−2). Therefore, it could be suitable for use in high pedestrian or traffic areas.

show abstract

Section: Resultssupporting

confidence: 91%

Recycled Aggregates from Construction and Demolition Waste in the Manufacture of Urban Pavements

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Kerb units made with up to 75 wt.% FRA or CRA and 25% wt.% FRA + CRA showed values below this threshold. Similar results had been observed in previous studies [71,72].…”

Section: Codesupporting

confidence: 93%

“…This effect could have been attributed to the lower density, higher porosity, and greater water absorption of RAs, as compared to NAs, due to the presence of adhered mortar, clay-based particles, and floating materials [69]. Furthermore, consistent with the results of similar research [70,71], the mechanical resistance was diminished because of the RA content. Table 6.…”

Section: Characterisation Of Laboratory-scale Precast Pavement Unitssupporting

confidence: 71%

“…This reduction in strength could be attributed to the presence of a porous interlayer within the aggregate and the cement body, which could have created weak points or interfaces within the concrete mix. This result could reduce mechanical strength, as the bond between the aggregate and the cement paste may have been weaker, resulting in a reduced ability to withstand applied loads [32,71].…”

Section: Codementioning

confidence: 99%

See 1 more Smart Citation

Eco-Friendly Pavements Manufactured from Mixed Recycled Aggregates Obtained from Construction and Demolition Waste: An Industrial-Scale Validation

Contreras-Llanes,

Gázquez,

Romero

2023

Materials

View full text Add to dashboard Cite

This study aimed to validate that laboratory-scale results could be commercially replicated when manufacturing marketable precast concrete. Construction and demolition waste (CDW) was separated into two (fine and coarse) recycled aggregates (RAs). Precast paver and kerb units were fabricated by partial or total substitution of natural aggregates (NAs) by RAs. The study involved the comprehensive characterisation of raw materials, including particle size distribution, mineral composition, and elemental composition. Paver blocks and kerbs manufactured with up to 50% RAs showed mechanical resistance (T = 3.7 ± 0.2 and B = 5.3 ± 0.6 MPa, respectively), water absorption between 5.3–5.7%, and abrasion resistance (approximately 20.2 mm), which met the standard requirements (UNE-EN 1340:2004 and UNE-EN 1338:2004). Furthermore, industrial-scale precast pavement units demonstrated strength and durability suitable for heavy traffic areas. A reduction of 13% in cement content could maintain the requirements with a partial RA substitution of 25%, offering economic and environmental benefits. Therefore, it is feasible at an industrial level to replace NAs with RAs, promoting durability and technological properties with a positive environmental impact and considerably reducing CO2 emissions by up to 65%. Overall, pavers with RAs manufactured at the laboratory scale met mechanical standards, and the kerb stones showed improvements in abrasion resistance. On an industrial scale, kerb stones and precast blocks with specific substitutions can meet strength, water absorption, and abrasion requirements, allowing a reduction in cement content.

show abstract

“…According to Sing et al [15], the inclusion of fine recycled aggregates resulted in a higher demand of the w/c ratio; however, CO 2 emission is reduced with the increase of fine recycled aggregates content in the concrete. Reddy et al [16] investigated the influence of the brick waste as fine aggregates on the properties of recycled aggregate paver blocks. They used brick waste as fine aggregates of a size between 150 µm and 4.75 mm as a replacement for natural fine aggregates by 25, 50, and 75%.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Durability Characterization of Hybrid Recycled Aggregate Concrete

Hameed,

Tahir,

Abbas

et al. 2024

Materials

View full text Add to dashboard Cite

The recycling of construction and demolition waste (CDW) for the extraction of recycled concrete aggregates (RCAs) to be used to produce recycled aggregate concrete (RAC) is widely acknowledged internationally. However, CDW not only contains concrete debris but may also contain burnt clay bricks. The recycling of such CDW without the segregation of different components would result in recycled aggregates having different proportions of concrete and brick aggregates. The utilization of these aggregates in concrete requires a detailed investigation of their mechanical and durability properties. In this regard, the present study focused on investigating the mechanical and durability properties of hybrid recycled aggregate concrete (HRAC) made by the 100% replacing of natural aggregates with recycled brick (RBAs) and RCA in hybrid form. The partial replacement of cement with fly ash was also considered to reduce the corban footprint of concrete. An extensive experimental program was designed and carried out in two phases. In the first phase, a total of 48 concrete mixes containing coarse RBA and RCA in mono and hybrid forms were prepared and tested for their compressive strength. The test results indicated that the compressive strength of HRAC is greatly affected by the proportion of coarse RBA and RCA. In the second phase, based on the results of the first phase, eight concrete mixes with the most critical proportions of RBA and RCA in hybrid form were selected to evaluate their mechanical and durability performance. In addition, four mixes with natural aggregates were also prepared for comparison purposes. To evaluate the mechanical properties of the concrete mixes, compressive strength and modulus of rupture (MOR) tests were performed, while for the evaluation of durability properties, water absorption and behavior after exposure to aggressive conditions of acidic and brine solutions were studied. The results revealed that a 20% replacement of cement with fly ash resulted in acceptable mechanical and durability properties of HRAC intended to be used for making concrete bricks or pavers.

show abstract

Influence of brick waste and brick waste fines as fine aggregate on the properties of paver blocks – Preliminary investigation

Cited by 8 publications

References 29 publications

Recycled Aggregates from Construction and Demolition Waste in the Manufacture of Urban Pavements

Recycled Aggregates from Construction and Demolition Waste in the Manufacture of Urban Pavements

Eco-Friendly Pavements Manufactured from Mixed Recycled Aggregates Obtained from Construction and Demolition Waste: An Industrial-Scale Validation

Mechanical and Durability Characterization of Hybrid Recycled Aggregate Concrete

Contact Info

Product

Resources

About