What is the difference between microtexture and Macrotexture?

Microtexture refers to the small-scale texture of the pavement aggregate component (which controls contact between the tire rubber and the pavement surface) while macrotexture refers to the large-scale texture of the pavement as a whole due to the aggregate particle arrangement (which controls the escape of water from …

What is Macrotexture?

Macrotexture is generally defined as those surface textural features that are greater than 0.5 mm in height and therefore provide a drainage system for water on the pavement surface, thus preventing a buildup of water between the tire and the pavement and resultant hydroplaning.

What is the texture of pavement?

Overall pavement surface texture is comprised of the contributions of aggregate texture and gradation, pavement finishing techniques, pavement wear, and more. The resulting surface texture can be characterized in terms of texture depth and feature length or wavelength.

What is micro texture of pavement?

Micro-texture is the skid resistance or the resulting frictional potential provided by the material interface of the vehicle tyre and the pavement surface during accelerating and braking and can be measured using methods such as the British pendulum test.

Why skid resistance test is conducted on a wet pavement surface?

Skid resistance is the force developed when a tire that is prevented from rotating slides on a pavement surface (Highway Research Board, 1972). Hence, it is common practice to measure and report the skid resistance of a pavement surface under wet condition for the purpose of pavement friction management.

How do you increase skid resistance?

There are two main options for treatment of low skid resistance: Retexturing This method includes the mechanical reworking of the existing surface to improve its frictional characteristics and therefore the resistance to skidding. Typically involves the removal of material from the road surface.

Is textured pavement bad for tires?

A-In most cases, paving companies resurface the roads fairly soon after milling off the top layer and creating the grooved surface you describe. So, any kind of excessive tire wear from the grooved surface should be negligible.

Is asphalt a pavement?

Asphalt concrete (commonly called asphalt, blacktop, or pavement in North America, and tarmac, bitumen macadam, or rolled asphalt in the United Kingdom and the Republic of Ireland) is a composite material commonly used to surface roads, parking lots, airports, and the core of embankment dams.

What’s the point of textured pavement?

Officials say texturing the pavement will not only rejuvenate and improve the road’s surface, but that proper surface textures can also prevent vehicles from hydroplaning during wet weather. The interstate has seen several accidents during recent rainstorms.

How do you calculate skid resistance?

Skid resistance of paved surfaces is measured by a tester developed by North Carolina State University. This tester is a pendulum tester using a smooth rubber tire. The friction between the tire and the specimen is measured from the energy lost in the pendulum.

What are the factors affecting friction or skid resistance?

Factors affecting friction or skid resistance (i) Type of pavement surface namely, cement concrete bituminous, WBM, earth surface etc. (ii) Macro-texture of the pavement surface or its relative roughness. (iii) Condition of pavement namely, wet or dry, smoothened or rough, oil spilled, mud or dry sand on pavement.