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Full-Text Articles in Engineering
Design Of Durable Concrete Railroad Crossings, Anthony J. Lamanna, Charles F. Scholer
Design Of Durable Concrete Railroad Crossings, Anthony J. Lamanna, Charles F. Scholer
JTRP Technical Reports
Existing precast concrete railroad crossings in the state of Indiana are experiencing too short a life expectancy. This study proposes methods that can be used to produce durable concrete railroad crossings with satisfactory rideability, durability, and longevity. Thirty-two precast concrete railroad crossings were visited in central and northern Indiana. Failures were determined to belong to three major categories: structural capacity causes, environmental causes, and material property causes. A concrete mix was evaluated at three different polyolefin fiber contents and without fibers. Beams were tested in flexure, and modulus of rupture and first crack deflection were recorded for each beam. Cylinders …
Prediction Of Splitting Tensile Strength Of High-Performance Concrete, Hilmi Mahmud
Prediction Of Splitting Tensile Strength Of High-Performance Concrete, Hilmi Mahmud
Hilmi Mahmud
Splitting tensile strength (STS) is one of the concrete mechanical properties that are used in structural design. It can be related to numerous parameters, which include compressive strength, water/binder (W/B) ratio and concrete age. Until now, most researchers estimated the STS directly from compressive strength data. This paper suggests formulae that relate STS with that of compressive strength, W/B ratio and concrete age. The predicted STS can be obtained accurately using these formulae. It is proposed that the equation with the concrete age (t) parameter be used in predicting the STS of high-performance concrete (HPC). © 2002 Elsevier Science Ltd. …