Research on the Multi-Functional Composite Stay-in-Place Insulated Formwork for Concrete Dams in Cold Regions

This research presents a new type of composite stay-in-place (SIP) formwork for concrete dams in cold regions of China. The formwork module is high-strength concrete with sprayed polyurethane to provide heat insulation. It features a ribbed-slab structural pattern, which ensures a reasonable stress...

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Bibliographic Details
Published in:Strength of materials 2024-07, Vol.56 (4), p.865-873
Main Authors: Su, S., Li, E. Z., Lu, X. B., Zhao, Y., Li, X. L., Duan, Z. H.
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Classical Mechanics
Concrete dams
Concrete slabs
Damsites
Formwork
High strength concretes
Ice cover
Ice formation
Insulation
Materials Science
Modules
Polyurethane resins
Slab casting
Solid Mechanics
Stress distribution
Tensile stress
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Summary:This research presents a new type of composite stay-in-place (SIP) formwork for concrete dams in cold regions of China. The formwork module is high-strength concrete with sprayed polyurethane to provide heat insulation. It features a ribbed-slab structural pattern, which ensures a reasonable stress distribution and an acceptable level of maximum tensile stress. The formwork modules can be conveniently assembled on-site to form the molds for casting dam concrete, and due to the secure embedment of the module nodal legs into the dam, the ice-plucking delamination issue of the sprayed polyurethane boards commonly seen in the concrete dams in cold regions can be avoided. Besides heat insulation, this SIP formwork can also perform as a face cover to protect the dam concrete from ambient erosions, which requires the concrete to have excellent durability and good ductility. To fulfill this task, two types of high-strength concrete are proposed.
ISSN:0039-2316
1573-9325
DOI:10.1007/s11223-024-00697-7