About the author:

1. Energy Development Research Institute Co.,Ltd., CSG,Guangzhou, Guangdong 510663,China; 2. Southwest ElectricPower Design Institute Co.,Ltd. of China Power Engineering Consulting Group, Chengdu, Sichuan 500643,China;3. College of Architecture and Environment, Sichuan University, Chengdu, Sichuan 610065,China

Abstract:

The inner core region of pile foundation concrete exhibits high heat release from hydration andsignificant temperature rise,while the outer edge zone directly exchanges heat with the externalenvironment, resulting in high heat dissipation efficiency and minor temperature rise. This leads to alarge temperature difference between the interior and exterior of concrete,which is prone to inducetemperature cracks. Traditional curing methods struggle to precisely control the temperature differencebetween the interior and exterior of concrete and have high energy consumption. Thus, this paperproposes a temperature control electric curing technology for concrete based on three-phase electricity,and conducted electric curing tests on the pile foundation with a height of 950mm and a diameter of1200mm. The research results show that electric curing can control the temperature difference betweenthe interior and exterior of concrete within ± 2℃, effectively inhibiting the formation of temperaturecracks. After 3d of electric curing, the concrete strength reaches 29.4MPa, indicating that electriccuring technology has practical feasibility in engineering applications. Three-phase electricity reduces theneutral line current output to 0.4A, and the energy consumption for 3d of electric curing is only6.12kW·h, achieving significant energy conservation and emission reduction compared with traditionalsteam curing methods.