Final Report: Self Consolidating Concrete Construction for Modular Units

Gentry, Russell¹  Kahn, Lawrence¹  Kurtis, Kimberly¹  Petrovic, Bojan¹  Loreto, Giovanni¹  Van Wyk, Jurie²  Canterero-Leal, Carlos² 

[1] Georgia Inst. of Technology, Atlanta, GA (United States);Westinghouse Electric Company, Cranberry Township, PA (United States)

关键词: steel-composite construction;    nuclear reactor construction;    self-consolidating concrete;    shear-friction in concrete members;   

DOI  :  10.2172/1285866
RP-ID  :  DOE-GeorgiaTech--00667
PID  :  OSTI ID: 1285866

美国|英语

来源: SciTech Connect

【 摘 要 】

This report outlines the development of a self-consolidating concrete (also termed ???self-compacting concrete??? or SCC) so that concrete placement can be made into steel plate composite (SC) modular structures without the need for continuous concrete placement. As part of the research, SCC mixtures were developed and validated to ensure sufficient shear capacity across cold-joints, while minimizing shrinkage and temperature increase during curing to enhance concrete bonding with the steel plate construction found in modular units. The self-roughening concrete produced as part of this research was assessed in SC structures at three scales: small-scale shear-friction specimens, mid-scale beams tested in in-plane and out-of-plane bending, and a full-scale validation test using an SC module produced by Westinghouse as part of the Plant Vogtle expansion. The experiments show that the self-roughening concrete can produce a cold-joint surface of 0.25 inches (6 mm) without external vibration during concrete placement. The experiments and subsequent analysis show that the shear friction provisions of ACI 318-14, Section 22.9 can be used to assess the shear capacity of the cold-joints in SC modular construction, and that friction coefficient of 1.35 is appropriate for use with these provisions.