tailieunhanh - GLASGRlD Technical Manual - Advanced fiber glass technology for asphalt pavement overlays

Many pavements, which are considered to be structurally sound after the construction of an overlay, prematurely exhibit a cracking pattern similar to that which existed in the underlying pavement. This propagation of an existing crack pattern, from discontinuities in the old pavement, into and through a new overlay is known as reflective cracking. Reflective cracks destroy surface continuity, decrease structural strength, and allow water to enter sublayers. Thus, the problems that weakened the old pavement are extended up into the new overlay. The cracking in the new overlay surface is due to the inability of the overlay to withstand shear and tensile stresses created by movements of the underlying pavement | TECHNICAL FABRICS GLASGRlD Technical Man I. WHAT IS REFLECTIVE CRACKING II. TESTING REFLECTIVE CRACK PROPERTIES OF OVERLAYS III. GLASGRID PERFORMANCE IV. ENGINEER CHECKLIST FOR SPECIFYING OVERLAY REINFORCEMENT V. GLASGRID REINFORCED OVERLAY DESIGN GUIDELINES AND LIMITATIONS VI. SPECIAL CONTRACT PROVISIONS FOR GLASGRID VII. TYPICAL DESIGN CROSS SECTION Advanced fiber glass technology for asphalt pavement overlays - .