According to the findings made on French road network about .helow skidding resistance, GAILLEDRAT Pére & Fils com-rany developed a new surface treatment concept: THE SUR-:;'ACESHOTBLASTING.l'his technique which allows to treat most of the slippery road.urface problems on asphalt or concrete pavements. permits toncrease the surface roughness "as requested" and...
Optimizing the Surface Texture of Cement Concrete Roads
The growing concern about the influence of the road surface on traffic noise raises the problem of reducing the noisiness of cement concrete roads whilst keeping high skid resistance values. Studies on various aspects of tyre/road interaction con-ducted in the past ten years at the Belgian Road ResearchCentre provide basic...
Study of Long-Lasting Materials and Conventional Paints on Concrete Surfaces
Due to the increase of concrete use in road cons-truction, the report examines the influential fac-tors on the three most important properties in roadmarking, above all on concrete pavements.The analysed properties are:- Night visibility.- Day time visibility.- Skid resistance.The study makes a comparison of two systems:two components system (plastic of...
Optimization of Surface Characteristics of Cement Concrete Roads
The surface properties of a road pavement must fulfill a long list of requirements. Recently this list has been extended to include acoustic properties. Roughness is characterized by micro-, macro- and megatexture. The results of measurement of skid resistance and road-tire noise are discussed. Possibilities for further optimization of the...
Road Marking on Concrete Problems and Solutions
R.oadpaint containing a dissolving agent and hot applied ther-noplastic marking materials are most commonly used for roadnarking in the Netherlands. The only marking materials al-lowed on Dutch motorways are those that have proven theirsuitability in laboratory research and experimental sections on:he road. During a period of 25 years no concrete...
Measurements of Noise Caused by Tyre Friction on Different Test Roads
This report isabout various tests concerning noise caused by tyre-friction on various surface textu-res: on old and new concrete roads as well as ona rough, uneven surface.In this connection the influence of the various sur-face textures on the development of the noisecaused by tyre-friction is explained.Through these tests it could...
Noise Reducing Concrete Surface. a Model For Assessment
me of the attributes required from a pavement is a noise redu-ing effect. But an optimization of this attribute without con-idering other important requirements as stability and pos-ibilities for patching, reinstatement and environmentaliaintenance is contrary to all national economic principles. Inact it is the road user who is running the...
The Influence of Size and Hardness of Sand Particles and their Proportions on the Skid Resistance of Cement Mortars
irnestone and emery sands divided into 6 fractions, were used ,cast cement mortar specimens in PSV moulds. After 28-day ater curing the specimens were subjected to accelerated ilishing and their Skid Resistance Value (SRV) was measured ith the pendulum tester. Specimens of 100 % limestone or )0 % emery sand,...
Low-Noise Surfacing on Concrete Roads
he Utrecht-Amersfoort motorway (A28) was constructed with onreinforced, lightly brushed cement concrete with dowels. r1easurements taken in 1987 indicated that the level of noise nconvenience to the surrounding area exceeded the legally per-ritted standard. In 1988 a 3,500 m stretch of the road was firstround until it was even, then...
Materials Used in the Experimental Field in La Guardia Toledo For Marking Roads in Concrete Pavements
lith the aim to verify the suitability of the different materials sed in marking roads for concrete pavements, more than 30 ommercial products were tested on the experimental field. Iaterials were of different nature: based on alkyd resins, vinyl .sins, alkyd-chlorinated rubber, chlorinated rubber, acrylic sins, etc. efore the application,...
Ways of Reducing Tire-Noise on Concrete Pavements Experience and Tests in Austria
Tire-road noise can be reduced considerably by providing a suitable surface geometry. According to the new Austrian specifications pa-vers must be fitted with a longitudinal smootherto eliminate any transverse waves produced by thebeams of the paver. In order to obtain a noise-reducing surface a longitudinal texture (e.g.. a burlap drag)...
Improvement of the Road Surface Evenness of a Concrete Pavement by Grinding
Diamond grinding of a new concrete pavement surface produced an improvement on the road sur-face evenness which was evaluated in almost twounits in the International Roughness Index scale(mikm). This improvement was achieved mainlybecause of the removal ofroad irregularities withshort and medium wavelengths (0,5m