title: Feasibility of using phase change materials to control the heat of hydration in massive concrete structures.
abstract: This paper presents experimental results that can be applied to select a possible phase change material (PCM), such as a latent heat material (LHM), to control the hydration heat in mass concrete structures. Five experimental tests (microconduction, simplified adiabatic temperature rise, heat, and compressive strength tests) were conducted to select the most desirable LHM out of seven types of inorganic PCM used in cement mortar and to determine the most suitable mix design. The results of these experimental tests were used to assess the feasibility of using PCM to reduce hydration heat in mass concrete that was examined. The experimental results show that cement mortar containing barium- [Ba(OH)2 · 8H2O] based PCM has the lowest amount of total hydration heat of the cement pastes. The barium-based PCM provides good latent heat properties that help to prevent volume change and microcracks caused by thermal stress in mass concrete.
authors.affiliation: Department of Architectural Engineering, Gachon University, Gyeonggi-Do 461-701, Republic of Korea.
authors.forename: Won-Chang
authors.initials: WC
authors.lastname: Choi
authors.affiliation: Tripod Co., Inc., Daejeon 305-335, Republic of Korea.
authors.forename: Bae-Soo
authors.initials: BS
authors.lastname: Khil
authors.affiliation: Department of Architectural Engineering, Woosong University, Daejeon 300-830, Republic of Korea.
authors.forename: Young-Seok
authors.initials: YS
authors.lastname: Chae
authors.affiliation: Red Butterfly Strontium Industry Co., Ltd, Choungqing 402-368, China.
authors.forename: Qi-Bo
authors.initials: QB
authors.lastname: Liang
authors.affiliation: Department of Architectural Engineering, Chungnam National University, Daejeon 305-764, Republic of Korea.
authors.forename: Hyun-Do
authors.initials: HD
authors.lastname: Yun
mesh_terms: D017609:Barium Compounds / Q000737:chemistry; D019245:Compressive Strength; D003252:Construction Materials / Q000592:standards*; D006361:Heating; D012822:Silicon Dioxide / Q000737:chemistry; D013816:Thermodynamics; D014867:Water / Q000737:chemistry
chemical_list: D017609:Barium Compounds; D014867:Water; C012766:barium hydroxide; D012822:Silicon Dioxide