Assessment of geotechnical and geo-environmental behaviour of recycled concrete aggregates, recycled brick aggregates and their blends

Sharma, Ajay; Shrivastava, Neha; Lohar, Jagdish

doi:10.1016/j.clema.2023.100171

Cited by 9 publications

(7 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similar findings have been reported by other researchers [11,12,21], who have confirmed that the replacement of NA with RBW leads to an increase in OWC and a decrease in MDD. Additionally, Ajay et al [22] showed that the incorporation of RBW content leads to the increase of porous crushed clay in the mixtures, which has significant water absorption capacity and may contribute to the slight increase in OWC with increased RBW content in the mixtures.…”

Section: Proctor Compactionmentioning

confidence: 99%

Evaluation of Recycled Brick Waste Aggregates as a Sustainable Substitute in Cement Treated Base

Toumi,

Mezhoud,

Boukendakdji

et al. 2023

Selected Scientific Papers - Journal of Civil Engineering

View full text Add to dashboard Cite

Recycling industrial waste to obtain secondary raw materials is a key focus of environmental policy and circular economy strategies. One such industrial waste, recycled brick waste (RBW), is characterized by high pollution and low recycling rates. This paper evaluates the effects of graded replacement of various RBW sizes as a substitute for coarse and fine natural aggregate (NA) on the mechanical properties and durability of cement treated base (CTB). The novelty of this study lies in the durability evaluation of four types of CTB, including natural, recycled, and mixed CTB. RBW and NA materials are characterized and compared, and the mechanical properties and durability of CTB with RBW materials are analyzed and compared to CTB with 100% NA. The results show that the mixes containing waste bricks exhibit comparable mechanical characteristics and could be used in layers of pavement foundations. Additionally, the durability of the mixes containing RBW yields better results compared to blends containing NA.

show abstract

Section: Proctor Compactionmentioning

confidence: 99%

Evaluation of Recycled Brick Waste Aggregates as a Sustainable Substitute in Cement Treated Base

Toumi,

Mezhoud,

Boukendakdji

et al. 2023

Selected Scientific Papers - Journal of Civil Engineering

View full text Add to dashboard Cite

show abstract

“…The peak stress and elastic modulus in the compression of concrete was decreased with an increase in ratio between Si-RBA and RCA. Sharma et al [26] carried out the assessment of the geoenvironmental and geotechnical behavior of RCAs, RBAs, and their blends. Based on the low values of impact and crushing resistance of the blends, their application in the surface and base course of pavements was not recommended.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, in the past two decades, the production of cement has increased three times, from 1.1 billion tons to 3.27 billion tons globally. At the end of 2030, the production of cement will reach up to 4.83 billion tons [26]. Therefore, to provide a sustainable solution for the effective use of construction waste from concrete and masonry structures, a hybrid use of recycled concrete and brick aggregates is proposed to prepare RAC, along with the partial replacement of cement with fly ash.…”

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

“…At present, many scholars mainly focus on the study of recycled concrete aggregate, and the study of recycled brick aggregate is still small. [8,9] And it is important to study the effect of recycled brick aggregate on recycled concrete for the recycling of waste bricks. As a new type of green concrete, recycled brick aggregate concrete will provide a new way to improve the disposal of waste bricks in construction solid waste.…”

Section: Introductionmentioning

confidence: 99%

Review of Fracture Properties and Research Methods of Fiber Recycled Concrete

Tong

2024

AJST

View full text Add to dashboard Cite

Aiming at the background of the application of fracture mechanics in fiber recycled concrete as well as the shortcomings of the current research, the relevant results and progress are summarized from three aspects, namely, the basic theory of fracture mechanics of fiber recycled concrete and the research progress of the fracture properties of fiber recycled concrete as well as the testing methods of the fracture of fiber recycled concrete, respectively. The development history of the application of fracture mechanics in concrete is described, three fracture forms, fracture process zones and three softening curve models of concrete are introduced, and it is proposed to combine the bilinear softening curve and the virtual crack zone model to construct the ontological relationship of the whole process of concrete cracking. The current research status of recycled brick aggregate concrete and polypropylene coarse fiber concrete is introduced. The incorporation of recycled brick aggregate adversely affects the workability, basic mechanical properties and fracture properties of concrete. The reinforcing effect of polypropylene fibers on concrete can effectively improve the adverse effects of brick aggregate on concrete, which opens up the research prospect of green concrete and has high research value. The applications of three-point bending test, four-point bending test and DIC technique in the study of concrete fracture characteristics are introduced.

show abstract

Assessment of geotechnical and geo-environmental behaviour of recycled concrete aggregates, recycled brick aggregates and their blends

Cited by 9 publications

References 39 publications

Evaluation of Recycled Brick Waste Aggregates as a Sustainable Substitute in Cement Treated Base

Evaluation of Recycled Brick Waste Aggregates as a Sustainable Substitute in Cement Treated Base

Mechanical and Durability Characterization of Hybrid Recycled Aggregate Concrete

Review of Fracture Properties and Research Methods of Fiber Recycled Concrete

Contact Info

Product

Resources

About