Diamond grinding addresses serviceability problems but not their root cause. For example, diamond grinding can substantially reduce the roughness on a faulted rigid pavement, but it will not address the cause of faulting, nor will it prevent roughness in the future as a result of additional faulting. Because the grinding head is cooled with ...
Diamond grinding removes a thin layer at the surface of hardened PCC pavement using closely spaced diamond blades. DG used to be an expensive operation; however, new, high production equipment as well as improved synthetic diamonds for saw blades made DG a more cost competitive option for PCC pavement rehabilitation. DG has not been extensively used by the department as a pavement rehabilitation option. Rather, it has been used primarily for removing bumps in the newly placed concrete pavement, especially at the transverse construction joints, to achieve ride quality specifications. The level surface is achieved by running the blade assembly at a predetermined level across the pavement surface, which produces saw cut grooves. The uncut concrete between each saw cut breaks off, more or less, at a constant level above the saw cut grooves, leaving a level surface with longitudinal texture as shown in Figure 10 28. Anchor: LJALLJMRgrtop Figure 10 28. Close up view of diamond groun...
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As stated above, DG can be a useful tool to correct functional distresses caused by pavement surface defects, such as, noise, roughness, and skid resistance. When noise has become an issue, research data shows that DG can reduce noise level significantly. Pavement roughness increases dynamic loading and resulting wheel loading stresses, thus reducing pavement life. Pavement roughness can be effectively corrected by DG. DG increases macro texture of the surface, thus improving drainage and skid resistance, and reducing the potential for hydroplaning.
The depth of DG is normally between 0.1 and 0.25 in. The increase in wheel load stress due to the reduced slab thickness by DG can be more than compensated by the reduction in dynamic loading. Also, the effect of reduction in thickness for thicker slabs is not as much as that for thinner slabs. The department has been building thicker slabs in anticipation of increased wheel load applications. DG will have a negligible effect on structural capacity of rigid pavement. Deeper diamond grinding will expose the coarse aggregate in the concrete pavement. Softer coarse aggregates that are exposed may polish and result in lower skid numbers. The department developed special specifications for diamond grinding.
Diamond Grinding is a technique for preserving and rehabilitating the concrete pavement surface of a highway. This technique has the potential to reduce costs of rehabilitating our aging infrastructure, while still providing travelers with a smooth, quiet ride.
Diamond grinding is a pavement preservation technique that corrects a variety of surface imperfections on both concrete and asphalt concrete pavements. Most often utilized on concrete pavement, diamond grinding is typically performed in conjunction with other concrete pavement preservation techniques such as road slab stabilization, full and partial depth repair, dowel bar retrofit ...
Diamond grinding is a concrete pavement restoration process that renews a worn or slightly irregular surface. Diamond grinding can potentially remove or reduce some pavement deficiencies such as joint faults resulting from minor pavement settlement, worn pavement from wheel rutting, warped slabs, and a rough surface texture.