Permanent deformation behaviour of unbound recycled mixtures

Cerni, Gianluca; Cardone, Fabrizio; Bocci, Maurizio

doi:10.1016/j.conbuildmat.2012.07.062

Cited by 34 publications

(19 citation statements)

References 14 publications

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“…As previously mentioned, the first part of research was based on the evaluation of the resilient response of UGM specimens tested in this study in comparison with specimens already tested in a previous experimental research for permanent deformation behaviour evaluation (Cerni, Cardone, & Bocci, 2012). Therefore, the current test programme, in terms of confining pressure σ 3 and cyclic axial stress σ 1 , followed exactly the procedure according to Table 1 (CEN, 2004), whereas Table 4 gives the testing programme adopted for the analysis of permanent deformation response.…”

Section: Test Procedures and Programmementioning

confidence: 99%

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Resilient behaviour of unbound granular materials through repeated load triaxial test: influence of the conditioning stress

Cerni

Corradini

Pasquini

et al. 2014

Road Materials and Pavement Design

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The present paper reports the results of a laboratory investigation aimed to investigate the resilient behaviour of unbound granular materials (UGMs) for pavement unbound layers under repeated triaxial loading. The first part of research was focused on the effects of stress history, in terms of loading conditioning phase and stress paths, on the resilient response of the investigated UGM. The obtained results highlighted that the samples that experienced several stress paths after an initial stress conditioning showed reduced resilient moduli as well as higher stress dependency of the resilient properties as compared with samples not subjected to any specific stress history. The second part of research aimed to evaluate the influence of the conditioning stress level on the resilient modulus. The results showed poorer resilient characteristics along the several stress paths as the selected conditioning stress increases. Whereas, a sort of "loading memory effect", resulting in a similar mechanical behaviour, can be recognised as a similar stress state between conditioning phase and subsequent stress path is considered. The study confirms the high dependency of the resilient response of UGM on the stress condition and in particular, the main role of conditioning confining pressure on the stable mechanical behaviour of these materials is highlighted. Finally, a simplified approach that would allow the intrinsic resilient properties of UGM to be predicted for a specific combination of conditioning stresses and stress paths is proposed.

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Section: Test Procedures and Programmementioning

confidence: 99%

“…Downloaded by [University of Otago] at 00:55 26 July 2015 Table 4. Testing programme for permanent deformation analysis (Cerni, Cardone, & Bocci, 2012). Both types of test were performed setting the confining pressure constant and applying an additional cyclic axial stress with a frequency of 2 Hz.…”

Section: Test Procedures and Programmementioning

confidence: 99%

Resilient behaviour of unbound granular materials through repeated load triaxial test: influence of the conditioning stress

Cerni

Corradini

Pasquini

et al. 2014

Road Materials and Pavement Design

Self Cite

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“…Ayrıca yapılan deneyler sonucunda YYA malzemesinin karayolu temel/alttemellerinde kullanılabilirliği Karayolları Teknik Şartnamesine göre incelenmiş ve YYA malzemesinin yassılık indeksi, Los Angeles Aşınma yüzdesi ve CBR değerlerinin uygun olduğu, su emme yüzdesinin ise biraz yüksek olduğu görülmüştür [43]. Su emme yüzdesinin azaltmak için su emmesi nispeten yüksek olan ince YYA malzemesi yerine su emmesi düşük olan doğal ince bir malzeme kullanılabilir [18].…”

Section: Bulgular Ve Tartişmaunclassified

“…Benzer sonuçlar farklı ülkelerde yapılan çalışmalarda da mevcuttur. Bu malzemeden optimum su içeriğinde dolgu inşa ederken gerekli olacak su ihtiyacını azaltmak için su emmesi %6,82 olan ince malzeme yerine su emmesi düşük olan doğal ince bir malzeme kullanılabilir [18].  YYA malzemenin optimum su içeriğindeki CBR değeri %99,98 çıkmıştır.…”

Section: Sonuçlarunclassified

Yapim Yikim Atiklarinin Yol Temelleri̇nde Kullanilabi̇li̇rli̇ği̇ni̇n İncelenmesi̇

Bağrıaçık¹,

Demir²

2018

Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi

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ÖZGranüler malzemeler dolgular, istinat duvarları, yol temelleri ve demir yolu balastı gibi inşaat mühendisliği uygulamalarında sıkça kullanılmaktadır. Ancak gün geçtikçe artan doğal kaynakların azalması ve madencilikle ilgili düzenlenen çevresel yönetmelikler, doğal kayaların ekonomik ve kolay çıkarılmasını daha da zorlaştırmaktadır. Bu durum ülkeleri doğal agregaya alternatif malzeme arayışına itmiştir. Bu çalışmada kentsel dönüşüm projesi kapsamında depreme dayanıksız olduğu belirlenen yapıdan alınan yıkıntı atıklarının birtakım işlemlerden geçirilerek geri dönüşümü yapılmıştır. Daha sonra laboratuvar deneyleri ile bu atıkların fiziksel ve mekanik özellikleri belirlenerek karayolu dolgularında kullanılabilmesi durumu incelenmiştir. Elde edilen sonuçlar farklı ülkelerde yapılan çalışmalar ile karşılaştırılarak ülkemizdeki yıkıntı atıklarının dünyadaki yıkıntı atıklarına benzerlikleri araştırılmıştır. Çalışma sonucunda ülkemizdeki binalardan elde edilen yapım ve yıkım atıklarının geri dönüştürülerek karayolu dolgularında kullanılmasına engel bir sonuç ile karşılaşılmamıştır.Anahtar Kelimeler: Yapım ve yıkım atıkları, geri dönüşümlü beton agrega, temel/alt temel tabakası, dolgu INVESTIGATION OF THE USABILITY OF CONSTRUCTION AND DEMOLITION WASTES IN ROAD BASES ABSTRACTGranular materials are commonly used in civil engineering applications like embankments, retaining walls, road bases and railway ballast. However, the availability of areas where natural rock can easily and economically be mined is becoming more difficult depending previous depletion of resources and environmental regulations associated with mining. This situation has pushed searching alternative materials to virgin aggregate of contractors. In this study, construction and demolition wastes taken from a structure that have low endurance against earthquake were subjected to some process and recycled. Then, its suitability of physical and mechanical properties for using as a filling material in base/subbase layer of road was investigated by laboratory tests. The results were compared with studies from different countries to examine the similarity of the wastes in Turkey. Finally, as it is seen, the waste material in Turkey has potential for using in base/subbase course of roads.

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“…CB at the lower target moisture contents of 70% of the OMC was also found to meet the requirements of typical quarry granular sub-base materials. The properties of CB, RAP, and FRG, however, may be further enhanced with additives or mixed in blends with high quality aggregates to enable their usage in pavement sub-bases Cerni et al (2012)provided a practical and innovative method for ranking granular material for pavement design on the basis of a performance-related approach such as permanent deformation analysis; on the other, they supported the use of construction and demolition materials as a sustainable and cost effective alternative to traditional aggregates. investigated the recycled crushed brick when blended with recycled concrete aggregate and crushed rock for pavement sub-base applications.…”

Section: B Review Of Past Workmentioning

confidence: 99%

Improvement of Strength Characteristics of Sub-Base/Base Course using Cement, Pond Ash and Recycled Aggregate

Batra¹

2018

IJRASET

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Highways are the most common public work facilities for transportation. Early provision of a large network of cheap yet efficient roads is of vital importance to the rapid development of the country. Further, the demand for a greater mileage of roads with fast developing economy of India and with restricted amount of finances makes it obligatory utilizing the local materials for Highway construction. The conventional methods and materials of road construction, maintenance and operation consume enormous resources. There are many number of routes on which less traffic justifies only low-cost type pavements. For important routes where there is enormous increase of traffic, the importance of adequate base course and sub base has substantially increased and they should possess more strength than previously required. Soil stabilization provides an answer to the problem as various waste materials can be successfully used for stabilization. This study has been conducted to investigate the effects of replacement of Natural Coarse aggregate (NCA) by Recycled concrete aggregate (RCA) and use of pond ash (PA) and cement as stabilizing agents on the strength characteristics of sub-base/base course. For pond ash, the disposal is quite a costly affair for the coal burning utility plants, can be very conveniently used for the economical construction of low cost roads having treated surfaces and for the stabilization of base/sub-base underneath the high type flexible or rigid pavements Keywords: Concrete, Highway, Pond ash, Pavements I. INTRODUCTION A. GeneralThe emphasis was given to increase the sustainability of environment and better ways have been explored to manage wastes materials such as coal ash, plastic, rubber, construction and demolition waste, broken glass, scrap tyres, steel furnace slag etc. which are creating a number of problems in handling and disposing. These waste materials are disposed off either in low lying areas or in land fill sites which result in filling of land fill site at a very fast rate. So, reducing, reusing and recycling are the need of hour to save the natural resources as well as to save the land fill site which are otherwise going to create space problems for disposal of waste material. It is estimated that 10-12 million tons of construction and demolition waste (CDW) is generated in India every year which needs a huge space for disposal. It is also surveyed that there is a huge deficit of about 750 million cubic meter aggregates to achieve the targets of road sector in India (www.urbanindia.nic.in). So, CDW can prove to be very useful to meet the demand and supply gap of road sector. The bricks, metal and wood items are reused in new construction but the concrete and masonry waste which forms more than 50% of CDW are still not recycled in India. Therefore, there is need to recycle these concrete waste which are creating disposal problem in construction industry. These recycled concrete aggregates (RCA) which are cheaply available from construction and demolition sites can be used i...

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Permanent deformation behaviour of unbound recycled mixtures

Cited by 34 publications

References 14 publications

Resilient behaviour of unbound granular materials through repeated load triaxial test: influence of the conditioning stress

Resilient behaviour of unbound granular materials through repeated load triaxial test: influence of the conditioning stress

Yapim Yikim Atiklarinin Yol Temelleri̇nde Kullanilabi̇li̇rli̇ği̇ni̇n İncelenmesi̇

Improvement of Strength Characteristics of Sub-Base/Base Course using Cement, Pond Ash and Recycled Aggregate

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