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- W578910819 abstract "This paper summarizes the work session on rigid pavements held at the 1973 Federal Highway Administration workshop on Water in Pavements in Portland, Oregon. The session focused on freeway construction and the drainage of concrete pavements in freeway construction. California primarily constructs nonreinforced concrete pavement without any tie bars. Portland cement concrete (PCC) is placed on a cement-treated base. Washington constructs nonreinforced concrete paving, but they do use tie bars at the longitudinal crack. They place their PCC pavements on an asphalt-treated base. Oregon uses a fully reinforced PCC pavement with transverse steel in the traveled lanes, but no tie bar at the longitudinal crack. PCC is placed on an asphalt-treated base. All three types of construction allow the intrusion of surface water through the longitudinal and transverse joints, in both the reinforced and nonreinforced sections. The use of longitudinal and transverse subgrade drains in the design phase of these pavements are normally limited to those locations that are identified during the early soil investigations, where trouble was anticipated. Additional subgrade drains are added during construction, based on the soil and groundwater conditions found and on engineering judgment. Sand blankets provide drainage and cut down the infiltration of the fine clay particles into the bottom portions of the joints. Participants unanimously agreed that joint sealing of PCC pavement is a serious problem. The infiltration of moisture to swelling clay subgrades is also difficult to cope with. Landscaping practices create difficult problems in keeping the pavement section at a stable moisture condition." @default.
- W578910819 created "2016-06-24" @default.
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- W578910819 date "1973-01-01" @default.
- W578910819 modified "2023-09-26" @default.
- W578910819 title "SUMMARY OF WORKSHOP SESSION ON RIGID PAVEMENTS--PORTLAND, OREGON" @default.
- W578910819 hasPublicationYear "1973" @default.
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