The Spectral-Analysis-of-Surface-Waves (SASW) method is a non-destructive seismic method which has been used in situ to determine the elastic moduli of soils and pavements at low level of strain and the variation of these moduli with depth. The test is based on the dispersion of Rayleigh-waves which means that Rayleigh...
Test Method for the Determination of Wear Resistance of Concrete Pavements – a Ring Analysis of Northic Road Simulators
In the European Committee of Standardization (CEN) road simulators have been proposed as test equipment for determining the wear resistance of concrete road surfaces to studded winter tyres. The purpose of this ring analysis was to find what relationship there is between three Nordic road simulators and to produce proposals...
Transverse Joint Spalling Models for JPCP and JRCP
This paper presents transverse joint spalling models developcd for both jointed plain concrete pavements (JPCP) and jointed reinforced concrete pavements (JRCP). These models were developed as a part of a rigid pavement performance study (RIPPER) conducted by ERES Consultants, Inc. and sponsored by the U.S. Federal Highway Administration (FHWA). The...
Repair of Concrete Pavements Using High Performance Concrete
When heavily trafficed concrete pavements are being renewed, the work generally has to be carried out under considerable time-pressure. A newly developed, high performance repair concrete is ideally suitable for such repair work on account of its high early and final strength as well as its durability. It is produced...
High Performance and Rapid Setting Concrete for Airports Roads, the Experience of Madrid-Barajas Airport
This report details the reconstruction of 12,500 m 2 of 7.5*7.5*0.4m concrete slabs on the Madrid-Barajas airpoi't apron, using high performance and rapid setting concrete (HPRSC). HPRSC is an ideal concrete for this type of repairs, given that within six hours of placing the slab is able to bear its...
Properties of Porous Concrete with High Strength
In recent years in Japan, permeable asphalt pavement, with its efficient drainage and reduced tire/road noise, has seen increasing use because permits safer driving and does not create environmental problems. For this study, inorganic materials were used to make porous concrete suitable for roadway use, without the addition of polymers....
Stiff Concrete Paving on Minor Road Systems – Results of a National Inquiry About Mountain Roads
Our investigation was aimed at obtaining information on the road pavements of several mountain road systems subjected to limited traffic and leading to sheep-farming settlements or woodland areas managed by local mountain consortia (Mountain Communities, CM). Steeper car-track sections were found to be paved in concrete to prevent vehicles from...
Quality Assurarice and Functional Demands
Quality a.curance and functional demands are taken more and more into account in contracts for road construction. This paper describes a contract for a 15 km long concrete pavement for a motorway in West Sweden. Functional demands were chosen for wear resistance, evenness, tensile strength, thickness, frost resistance, surface friction,...
Experiments with Concrete Pavements on the LCPC Fatigue Test Track
In France, the Highway Department, the concrete pavement contracting companies and the lime and cement industries represented by their national associations, initiated in 1991 a major experiment on the pavement fatigue test track of the Laboratoire Central des Ponts et Chaussées (LCPC). The objective of these full-scale tests was to...
Improvement of the Adherence between Old and New Concrete in Road Construction – Procedures and Testing Methods
The mechanical adherence properties of new concrete bound with old concrete surfaces which had been pretreated in a conventional manner as well as with new techniques, have been studied uding fracture mechanical methods. It was shown that far better adherences are achieved with specially structured old concrete surfaces than with...
Stabilization of Contaminated Soils
The elution behaviour of acid and alkaline soils, contaminated with diesel oil, PER and mercury salt, of different grading curves (sandy loam to loam-free fine gravel), was examined both before and after stabilization with cement. After cement stabilization, all heavily contaminated soils (eluate class Ill) yielded an eluate that corresponded...
Urban and Pen-Urban Porous Pavements
The control of disturbances (noise, flooding, runoff water pollution, etc.) nowadays constitutes a major preoccupation of local populations. The roadway, in the diversity of the functions it performs in the urban and pen-urban scctor, can contnibutc activcly to the control of such disturbances. Porous pavements constitute a valuable area of...