Experimental evaluation of load transfer efficiency of non-dowelled concrete pavements

Generally, joint performance in concrete pavements is evaluated in laboratory by applying dynamic loads that require large scale experimental setups. In order to propose a simplified laboratory test, a comprehensive literary review of the fundamentals of load transfer at joints is made, and the load transfer efficiency obtained via a reduced...

Determination of fracture energy of early age concrete through a uniaxial tensile test on an un-notched specimen

Unlike the notched specimens for conventional concrete fracture tests, this paper introduces a deformation-controlled uniaxial tensile test on an un-notched specimen. The surface of the dog bone-shaped specimen is a second order parabolic curve, and the gradual change in the specimen shape does not lead to extreme stress concentrations....

Laboratory characterization of the load transfer-crack width relation for innovative short concrete slabs pavements

Aggregate interlock is the dominant load transfer mechanism in non-dowelled Jointed Plain Concrete Pavements, as the innovative short concrete slabs. Although the Load Transfer Efficiency of this pavement innovation is based on that mechanism, the structural design methods do not relate the Load Transfer Efficiency by aggregate interlock with...

Joint faulting behaviour of innovative short concrete slabs

Pavements are one of the largest assets of a city and their functional condition (ride quality) is priority for their clients. In jointed plain concrete pavements (JPCPs), the presence of joint faulting (JF) reduces the ride quality. Today, short slabs are available as a cost-effective JPCP innovation. The objective of this paper is to analyse...

Modelling the effect of plastic sheet curing on early age temperature development in concrete pavement

Prediction of the temperature development at an early age is a good starting point to assess the development of the restrained thermal stress and thermal cracking in rigid pavements. This paper presents a numerical early age concrete pavement temperature prediction model. It enables to evaluate the effect of various paving conditions, such as...

Veldonderzoek naar reflectiescheuren in DGB-verhardingen met ZOAB-deklaag

Doorgaand gewapende betonverhardingen (DGB) worden met name in België frequent toegepast bij de (re)constructie van zwaarbelaste wegen zoals autosnelwegen. Bij dit type betonverhardingen worden geen dwarsvoegen toegepast om de scheurvorming te beheersen maar een krimpwapening die moet resulteren in een patroon van regelmatig verdeelde fijne...

Optimalisatie scheurpatroon in DGB-verhardingen door scheurinitiatie

Doorgaand gewapende betonverhardingen (DGB) worden met name in België frequent toegepast bij de (re)constructie van zwaarbelaste wegen zoals autosnelwegen. Bij dit type betonverhardingen worden geen dwarsvoegen toegepast om de scheurvorming te beheersen maar een krimpwapening die moet resulteren in een patroon van regelmatig verdeelde fijne...

Innovatieve naadbeschermers bij ZOAB inlagen

Voor bij zowel rijstrook- als rijbaanbreed onderhoud aan Zeer Open AsfaltBeton (ZOAB) worden door aannemers steeds vaker zogenaamde naadbeschermers toegepast om vroegtijdige schade aan langsnaden in de garantie periode van 7 jaar te voorkomen. Meestal worden bitumineuze strips aangebracht ter bescherming of worden naden afgegoten met hete...

Uncracked joints in plain concrete pavements: causes, effects and possibilities of improvements

During the construction of Jointed Plain Concrete Pavements (JPCPs) in Chile, it was observed that joints remained uncracked. The objectives of this paper are to evaluate the effects of uncracked joints (UnCrJ) in JPCPs and to propose possible solutions or improvements to avoid or minimize this phenomenon. Considering low thermal amplitude as...

Functional thresholds for designmaintenance of urban pavements: Functional criteria for sustainable design of urban pavements

Functional criteria have been mostly defined in urban pavements using subjective methods, rather than by means of objective and repeatable procedures. The Whole<br/>Body Vibration, the Heart Rate Variability, and new technologies to determine the<br/>IRI (International Roughness Index), are nowadays available. For that, an analysis of<br/...

Innovations in concrete pavements for a sustainable infrastructure

Concrete pavements (CPs) are durable and they do not need periodic invasive maintenance interventions. Nevertheless, CPs are hardly chosen when only initial costs, instead of life-cycle costs, are considered in the evaluation. Nowadays, there are innovations in Jointed Plain Concrete Pavements (JPCPs) that reduce initial costs about 25% with...

Fracture analysis of cement treated demolition waste using a lattice model

Fracture properties of cement treated demolition waste were investigated using a lattice model. In practice the investigated material is applied as a cement treated road base/subbase course. The granular aggregates used in this material were crushed recycled concrete and masonry. This results in six different types of phases in the mixture:...

Investigation of the resilient behavior of granular base materials with simple test apparatus

In many developing countries, where resources are at premium, thin asphalt layers or chip seals are widely used to provide a durable all weather pavement surfacing. In such pavements the role of granular layers is very important in the general performance of the structure. Pavement designs in these countries are empirical in nature and rely on...

Characterization of Blast Furnace Slag to be used as Road Base Material

In congested areas around the world, traffic has significantly grown beyond expectation both in terms of volume and weight. Any hinder to the traffic causes severe delays resulting not only in economic loss but also in extra pollution of the environment. Therefore, maintenance works are desired to be reduced as much as possible. Application of...

Investigation of combined effect of mixture variables on mechanical properties of cement treated demolition waste

One of high efficient ways to reuse the recycled construction and demolition waste (CDW) is to consider it as a road base material. The recycled CDW however is mainly a mix of recycled masonry and concrete with a wide variation in composition. This results that the mechanical properties of cement treated demolition waste are not only determined...

Application of aging methods to estimate long term performance of secondary materials for road construction

Long term performance of secondary materials is becoming a challenging aspect in road construction since due to their benefits they are being used on a large scale, but on the other hand their future behaviors are difficult to estimate. In this study, aging is proposed as a means of exploring the long-term mechanical and physical performance of...

Mixture optimization of cement treated demolition waste with recycled masonry and concrete

Due to environmental reasons and the shortage of natural resources, it is greatly valuable to recycle construction and demolition waste (CDW) as much as possible. One of effective ways to reuse more CDW is to produce a cemented road base material. The recycled CDW however is a mix of recycled masonry and concrete with a wide variation in...