Roads now ofcen have to be provided wich noise control scructures, those most commonly employed being earthbanks, steep-faced banks, acoustic screens and noise reduccion barriers. Large installations and special structures for noise control purposes are more rarely encountered. "Steep-faced banks", which occupy less space than earth-banks, consist of a supporting...
Design and construction of noise-abatement devices along roads
Improved jointed concrete pavement designs through field observations
This paper will provide specific recommenda~ions for the improvemen~ of jointed concre~e pavement design practice. Tbe recommendations will be based upon findings from a major nationwide research project recen~ly completed in the USA concerning field observations of pavement performance. A concre~e pavement performance database was established and extensive data collected...
Spanish experiences in roller compacted concrete pavements in the years 1984-85
Roller compacted concrete pavements have been used in e~ght experiences, with about 100,000 m2 paved in d1fferent parts of the country and diverse orographical and ~limatological conditions(Barcelona, Valencia, Valladol1d, Leon, Sevilla and Zaragoza). According to the same standard specifications, pavements have been built with different material properties, concrete mixing procedures...
Construction of cycle tracks with cement-bound materials
Cycling is "in". The bicycle manufacturers' sales figures show an increase from 1 million to 5 million machines per year over the period from 1956 to 1980. To extend and develop a cycle track network in response to this increase is a logical consequence. Environmental protection and health-conscious behaviour patterns...
Pavement monitoring and heavy maintenance on the Geneva-Lausanne motorway
The Geneva - Lausanne moeorway, which was commissioned in 1964, comprises about ~5 km of concrete pavement consisting of 20 cm thick doweled slabs (10m x 4m) resting on a non-stabilized 55 cm thick gravel-sand sub-base (0 -100 mm particle size). The subgrade consists of non-stabilized natural insieu soils as...
New Jersey type safety barriers – Experiences in Belgium
This paper reports the experience gained by the Highways Department in Belgium in the construction of so-called New Jersey safety barriers during the past few years. First the reasons why the Ministry of Public Works gave up the more traditional protection systems such as steel or aluminium safety fences are...
Ten years of hydraulic concrete pavement of the Mediterranean 75 highway
The highway Tarragona-Valencia-Alicante, 375 km along che Spanish easccoasc, has 240 km of concrete pavement. It is being used, in sections, since June 1974. Due co the similar climate and geology of California (U.S.A.) and che Spanish Levante, in the initial design of 1972 Californian technology was mainly used. The...
Concrete pavement constructed in extreme atmospheric conditions
In a Spanish road in the main network that joins Zaragoza with Huesca, a 9 km long by~pass is being built, in order to supress two railway grade crossings and improve the location. The structural section consists in 15 em of lean concrete and 25 cm of pavement concrete. By...
Realization of agricultural roads in concrete in Belgium
The construction of concrete agricultural roads continues to increase in Belgium; latest statistical data show that public autorities still rely on this type of pavement. A new design method was recently proposed and published by the Ministry for the Walloon Area; it is based on simple concepts and its application...
Determination of slab rocking at the joints of a cement concrete pavement
The amplitude of the deflection at the ends of the slabs at the transverse joints under the passage of a heavy load is an impo.tant c.iterion for assessing the effecciveness of the load transfe. at the joints and for the degree of deterioration of the carriageway. The technique applied at...
Construction of concrete noise protection barriers
The finalizing of the Federal German-law relating to pollution and nuisance control (Bundesimmissionsschutzgesetz) in April 1974 was an important step in the implementation of active noise control measures. The "Guidelines for traffic noise control on Federal interregional highways" published by the Federal German Minister of Transport in August 1983 establishes...
Design of concrete pavements
Together with the increasing demand for concrete pavements in the Netherlands, the need for a technically and economically justified method of pavement design arose. On the basis of the present knowledge on the stress and deformation behaviour of concrete under static and repeated loading, a method of concrete pavemen~ design...