Feasible use of recycled concrete aggregates and crushed clay brick as unbound road sub-base

Poon, Chi Sun; Chan, Dwm

doi:10.1016/j.conbuildmat.2005.01.045

Cited by 495 publications

(218 citation statements)

References 5 publications

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“…Both sets of results are high; for example, Poon and Chan (2005) found equivalent values of c. 200 mg/l for crushed clay bricks. Moreover, both brick types yielded levels significantly in excess of the upper limit of 300 mg/l for class 6I/6J fill, thereby precluding the potential use of metallic soil reinforcement, or other metallic structural elements within 500 mm of the crushed brick fill.…”

Section: Sulfate and Oxidisable Sulfide Testsmentioning

confidence: 86%

Use of crushed brick in reinforced earth railway structures

Ellis

Goodwin

Laycock

et al. 2016

Proceedings of the Institution of Civil Engineers - Constructio

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The Bermondsey Dive-Under (BDU) scheme is a fundamental part of UK's Thameslink Programme. The scheme involves extensive demolition of 900 m of masonry viaduct followed by the construction of 900 m of new structures, 200 m of reinforced-earth structures and 200 m of embankment modifications. Crushed brick is typically not used as a structural fill material in the UK due to concerns over its friability and associated long-term performance. This paper describes a study undertaken in 2012 that examined the viability of recycling the demolished brickwork material into a crushed engineered fill material for use in the BDU permanent works. The overarching objective of the study was to seek to reduce the scheme's significant volumes of both imported fill and exported demolition material, with associated sustainability advantages in addition to the environmental and safety benefits resulting from the significantly reduced lorry movements from London's streets. The paper details the sampling and testing of brickwork that was undertaken and presents the findings from the study. The paper also discusses some of the issues associated with introducing innovation within major work programmes. The BDU scheme is currently under construction and is scheduled for completion in 2017.

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Section: Sulfate and Oxidisable Sulfide Testsmentioning

confidence: 86%

Use of crushed brick in reinforced earth railway structures

Ellis

Goodwin

Laycock

et al. 2016

Proceedings of the Institution of Civil Engineers - Constructio

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“…20 It was studied to take advantage of the accumulated residuals in the streets; the NEVI-12-MTOP norms were implemented and compared the results with similar research experiences; Also, different technical methods will be applied that will give a solution to the use of the accumulated material. 21 Calderero, R., Panchana, M., Lectong, D., & Hernández, E. (2018 A solution was investigated to reduce the debris caused, the result of the economic and environmental impact was taken into account. A quantitative investigation was carried out, a selection and collection of material were made for the San Agustín quarry's sub-base road that will serve to replace its aggregates by …”

Section: Methodsmentioning

confidence: 99%

Use of Concrete Debris

Calderero

Panchana

Lectong

et al. 2018

IJPSE

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Natural disasters in a very short time are capable of destroying what man has built using different types of resources, the construction of buildings, houses, etc. In their construction processes, they use different materials in a separate way that mixes and this process give them hardness and resistance to these materials. When they are destroyed they lose their individual properties and become waste; this research aims to make a study of the NEVI-12-MTOP standards, to be able to reuse the debris materials generated by the destruction of the earthquake on April 16. A bibliographic search was carried out related to the use given to waste caused by earthquakes in different countries. In the city of Portoviejo, the largest amount of debris was a concrete waste, and it can be concluded that these materials can be used as sub-base material in the road structures, so the reuse method was proposed. In particular, the characteristics of the residual materials were obtained as a result of the analysis of environmental, economic and material safety feasibility.

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“…This research revealed that the bulk specific g ravity and water absorption values were 2.53%, 2.54%, 1.43% and 1.77% for RCA-1 and RCA-2, respectively [2]. Elsewhere, physical and mechanical tests were carried out on crushed clay brick (CB) fro m partit ion wall and RCA by Poon and Chan (2006). The particle sizes of the RCA were: 40 mm, 20 mm, 10 mm and <5 mm and the water absorption values were: 3.17%, 2.17%, 2.29% and 10.3%, respectively.…”

Section: Introductionmentioning

confidence: 99%

“…It was concluded that CB had the highe st water absorption value, follo wed by RCA and natural aggregate. The high amount of adhered mortar attached to the CB particles led to increase in the water absorption value [3].…”

Section: Introductionmentioning

confidence: 99%

Water Absorption Study Recycled Aggregates for Use Pavement Material

Ayan¹,

Omer²,

Azadani³

et al. 2014

OALib

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Water absorption properties of recycled materials play an important role in pavement performance. The performance of aggregates changes after absorbing water, then it affects highways layers such as base, subbase, capping. This is why these materials must comply requirements of codes and standards. With regard to the increasing trend of application of recycled aggregates in highways layers, this issue needs more investigation. This research is only a part of our large research programm e on three different purposed mixes of unb ound subbase m ixture b elow: 1) 100% Recycled Concrete Aggregate (R CA); 2) 100% Lime Stone (NA); 3) 50% RCA + 50% Reclaimed Asphalt Pavement (R AP). Water absorption for each mix has been performed in different size fraction with pyknometer and wire basket methods. The relationship between density, gra ding and water absorption and its comparison for mixes would be indicating the changes in beha viour of aggregates and future performance of subbase. Laboratory testing showed that 100% Lime Stone had the higher densities than other mixes and water absorption value of 100% RCA was about 40% higher than 50% RCA + 50% RAP in 31.5 mm -4 mm fraction.

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Feasible use of recycled concrete aggregates and crushed clay brick as unbound road sub-base

Cited by 495 publications

References 5 publications

Use of crushed brick in reinforced earth railway structures

Use of crushed brick in reinforced earth railway structures

Use of Concrete Debris

Water Absorption Study Recycled Aggregates for Use Pavement Material

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