Outline of Revision of “Recommendations for Planning, Design, and Construction of Concrete in Hot Weather”
By S. Hashimoto, A. Hosoda, Y. Kamihigashi and K. Watanabe
Concrete Journal, Vol.63, No.12, Dec. 2025
- Synopsis
- This paper reports an outline of the “Recommendations for Planning, Design, and Construction of Concrete in Hot Weather” published by the Japan Society of Civil Engineers (JSCE) on March 13, 2025 with the aim of positioning it as a practical handbook that ensures both worker safety during the hot season and the quality of concrete structures. In the 2023 edition of JSCE’s Standard Specifications for Concrete Structures [Construction: Concrete for Specific Purposes], the scope of application was defined as a concrete temperature at placement of 38°C or below, and specific countermeasures for cases exceeding 35°C were newly introduced. However, JSCE previously had no dedicated guidelines for hot-weather con crete, and more concrete guidelines aligned with the philosophy of the Specifications were needed. The present Recommendations comprehensively organize specific measures and underlying approaches for planning, design, and construction, with the objective of ensuring the quality of concrete structures during hot-weather periods.
- Keywords:
- Hot-weather concrete, Concrete temperature, Chemical admixtures for hot weather, Wet-bulb globe temperature (WBGT), Concrete with hot-weather measures applied, Construction planning, Environmental and construction conditions
