Friends link: C2010-590 C2010-599 C2090-913 CA0-001 CTFL-001 E20-324 HH0-130 JN0-101 JN0-692 M2020-622 1D0-525 1Y0-250 1Y0-350 1Z0-510 200-001 200-530 225-030 250-316 352-001 4A0-103 4A0-105 700-104 70-177 70-416 70-432 70-450 70-452 70-668 920-183 9A0-125 9A0-127 A00-260 A2010-570 A4040-224 ASC-029 C_TADM51_70 C2010-502 C2010-538 C2010-564 C2010-577 HP0-S41 640-722 JN0-102 300-208 070-483 1Y0-253 1Z0-478 640-461 1Z0-591 400-101
• Friday, January 20th, 2012

What:  Diamond grinding  uses closely-spaced diamond saw blades to remove a thin layer at the surface of hardened portlandDiamond Grinders cement Concrete Pavements.  The blade assembly is run at a predetermined level (typically 3/16 to 1/4 “) across the pavement surface, producing saw cut grooves.  The uncut concrete between each saw cut breaks off, leaving a macroscopically level surface with longitudinal texture.  The new riding surface is level, smooth and quieter.  The closely spaced grooves give the riding surface excellent texture and frictional properties, reducing the potential for hydroplaning.  Diamond grinding is also often done in conjunction with other concrete repair methods to smooth the surface over and around repair sites.

While diamond grinding is sometimes used on asphalt pavements, it should not be confused with milling or scarifying.  Milling is an impact process that chips small pieces from the pavement surface.  Diamond grinding is an abrasive process.

Where:  Diamond grinding is appropriate on pavements with faulting, curling, warping, loss of friction and/or ruts caused by studded tires.  It is also used in conjunction with other concrete repair methods.

Why (advantages):  Provides a smooth riding surface that is often as good or better than a new pavement, removes faulting at joints and cracks, removes construction curling and moisture-gradient warping of the slabs, and removes other construction or environmental related roughness.  Diamond grinding enhances the surface texture and friction, and it reduces road noise and improves safety.  The improved macrotexture and the removal of ruts caused by studded tires reduce hydroplaning and accidents in wet weather.  Diamond grinding may be done in isolated areas as needed and during off-peak hours.  By providing a smooth surface, diamond grinding limits the dynamic loading, therefore extending the useful pavement life.  One of the lowest cost and quickest concrete treatments, diamond grinding is a cost-effective pavement preservation treatment.

Why not (disadvantages):  If the load transfer is deficient, faulting of the pavement joints will most likely recur.  If load transfer is not restored by other concrete pavement restoration techniques, such as dowel bar (load transfer) retrofit or undersealing, faulting will persist.  Diamond grinding does not correct any structural problems such as slab cracking or material problems such as reactive aggregates.  While removing more thickness than necessary to address the surface problems is not recommended, studies have shown that diamond grinding does not negatively affect fatigue performance when properly applied.  Diamond grinding does not significantly increase material durability.

When:  Diamond grinding may be done at any time when the distresses occur.  The earlier the problems are addressed, the fewer problems will be encountered in the future.  Diamond grinding can also be used to correct initial roughness due to construction problems and provide uniform skid resistance and appearance on new pavements.

Estimated life extension:  8-17 years.

For more information, see the Checklist for Diamond Grinding put together by FHWA and FP2 Inc.

You can follow any responses to this entry through the RSS 2.0 feed. Both comments and pings are currently closed.

Comments are closed.