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| Keywords: i-69 i69 interstate 69 interstate69 indiana monroe county monroecounty road interstate construction freeway concrete infrastructure e. s. wagner co. eswagnerco sealant transverse contracting joint transversecontractingjoint transverse joint transversejoint Near Harmony Road in Monroe County, Indiana, a paving crew lays the first round of asphalt to form the outside shoulder of Interstate 69's southbound roadway; looking northeast from Harmony Road bridge. The first-pass shoulder paver is a rather small piece of equipment, capable of laying a 4–5 foot wide layer of asphalt. The truck carrying the asphalt attaches to the paver, and together they move forward at a good clip. A roller with a narrow drum follows to compact the freshly laid material. In other ongoing work, a crew member applies a sealant to the interstate's transverse contraction joints. Every 15 feet, a narrow joint is sawed into the concrete roadway to control the cracking inherent in concrete slabs. Cracking is due to the tensile and bending stresses caused by the cement hydration process, traffics loads, and the environment. It is normal and expected, and while it cannot be eliminated, it can be controlled to some extent. Sealing the concrete joints with a polyurethane sealant, or similar compound, is imperative to deter the entry of water and other random materials. In the background, slipping out of view, is the mainline paving operation moving steadily toward Rockport Road. At this juncture, only about 1/2 mile of paving remained in Segment 8. E. S. Wagner Co., prime contractor (Indiana I-69 Corridor Project, Section 4, Segment 8). Near Harmony Road in Monroe County, Indiana, a paving crew lays the first round of asphalt to form the outside shoulder of Interstate 69's southbound roadway; looking northeast from Harmony Road bridge. The first-pass shoulder paver is a rather small piece of equipment, capable of laying a 4–5 foot wide layer of asphalt. The truck carrying the asphalt attaches to the paver, and together they move forward at a good clip. A roller with a narrow drum follows to compact the freshly laid material. In other ongoing work, a crew member applies a sealant to the interstate's transverse contraction joints. Every 15 feet, a narrow joint is sawed into the concrete roadway to control the cracking inherent in concrete slabs. Cracking is due to the tensile and bending stresses caused by the cement hydration process, traffics loads, and the environment. It is normal and expected, and while it cannot be eliminated, it can be controlled to some extent. Sealing the concrete joints with a polyurethane sealant, or similar compound, is imperative to deter the entry of water and other random materials. In the background, slipping out of view, is the mainline paving operation moving steadily toward Rockport Road. At this juncture, only about 1/2 mile of paving remained in Segment 8. E. S. Wagner Co., prime contractor (Indiana I-69 Corridor Project, Section 4, Segment 8). | ||||
