Early age concrete: temperature development, maturity, and thermal stresses by Prof. Kyle Riding скачать в хорошем качестве

Early age concrete: temperature development, maturity, and thermal stresses by Prof. Kyle Riding

Speaker: Prof. Kyle Riding, University of Florida, United States Hosts: Dr Prannoy Suraneni, University of Miami, United States and Prof. Karen Scrivener, EPFL, Switzerland Title: Early age concrete: temperature development, maturity, and thermal stresses Concrete early-age properties development are critical to both construction economy and long-term durability. Contractors desire fast strength gain to allow construction to progress. High temperatures during curing accelerate the early-age strength gain, but coarser pore systems that have lower durability. When the concrete cools, if not planned carefully, can result in large thermal stresses and cracking. Concrete simulations are used to predict concrete temperatures, deformation, and stresses during curing to identify when problems may be expected to occur, and develop mitigation strategies. This presentation will describe how the concrete heat of hydration can be characterized, including temperature sensitivity through the use of an apparent activation energy concept, how it can be simulated, and the concrete properties used to calculate the concrete thermal stresses using the simulated temperature development. Brief examples of how concrete temperature and stress simulations can improve construction will be given. ABOUT RILEM: The mission of RILEM is to advance scientific knowledge related to construction materials, systems and structures and to encourage transfer and application of this knowledge world-wide. This mission is achieved through collaboration of leading experts in construction practice and science including academics, researchers, testing laboratories and authorities.