Pavement HW 2 - Joints

Pavement HW 2 - Joints - 10/04/07 CEE 4664 HW #2 Ponce de...

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CICS 10/04/07 CEE 4664 HW #2 Ponce de Leon, Jessie 6/6 Describe the structured detail of the joints discussed in Chapter 4. Joints are provided in concrete pavements to prevent premature cracking due to moisture and temperature. There are four types of joints; contraction, expansion, construction, and longitudinal (Huang 127). Contraction joints are transverse joints and primarily used to relieve tensile stresses. Spacing of joints should be based upon the location since the type of coarse aggregate materials vary from place to place and have a significant effect on the coefficient of thermal expansion. In general, joint spacing should not exceed twice the slab thickness (in inches) (Huang 127). These joints can be either dummy grooves or premolded strips. A dummy groove is formed by placing a metal strip on the fresh concrete, which is later removed and sealed with a plastic (Huang 127). Dowels are needed if the joint spacing is large or if the panels are located near the edge of the pavement, and unnecessary if the spacing is small. Premolded strips are permanent and placed in fresh concrete. They can be either a felt
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Pavement HW 2 - Joints - 10/04/07 CEE 4664 HW #2 Ponce de...

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