| Abstract | Proper curing of concrete is important to ensure that it achieves its intended performance and durability. Conventionally, this is achieved through external curing, applied after mixing, placing and finishing [1]. As demonstrated in the previous chapters of the present report, internal curing (IC) is potentially a very promising tool in providing additional moisture in concrete for a more effective hydration of the cement. This chapter summarizes the main benefits of internal curing and presents case studies in which those benefits could be observed in existing concrete structures.Since the 1950?s, internal curing had been inadvertently accomplished in lightweight concrete structures before its potential for reducing self-desiccation in high-performance concrete (HPC) was recognized later in the 1990?s [2]. Low-density aggregates were primarily used to reduce the mass of concrete structures. In most applications, the aggregate was saturated prior to mixing to ensure adequate workability, as it was recognized that dry porous aggregate could absorb some of the mix water during concrete fabrication and placement [3,4,5]. Lightweight concrete with a density ranging from 1440 to 1840 kg/m3 has been used in bridge decks, marine structures and other structures [6]. It was shown to achieve long-term durability from the excellent in-service performance observed in the field [7,8]. Improved cement hydration due to internal curing is one of the benefits of using lightweight concrete in structures among other benefits related to design and construction, such as: structural efficiency, seismic performance, constructability, repair, durability and economic considerations [7,9]. |
|---|
