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ACI 213R-14: Guide to Low-Shrinkage High-Performance Concrete

The American Concrete Institute (ACI) published ACI 213R-14, a guide to low-shrinkage high-performance concrete. This report provides a comprehensive overview of low-shrinkage high-performance concrete (LSHPC), including its definition, materials, properties, and applications.

Key Points:

1. Definition: LSHPC is defined as concrete that exhibits low shrinkage (less than 500 microstrain at 28 days) and high-performance characteristics, such as high strength, durability, and resistance to cracking.
2. Materials: LSHPC typically consists of:
   • Cementitious materials: Type I or II cement, supplementary cementitious materials (SCMs) like silica fume, fly ash, or slag.
   • Aggregates: High-quality, dense aggregates with a low absorption capacity.
   • Admixtures: Chemical admixtures, such as shrinkage-reducing admixtures (SRAs) or polycarboxylate-based admixtures.
3. Properties: LSHPC is characterized by:
   • Low shrinkage: Reduced risk of cracking and improved long-term durability.
   • High strength: Compressive strengths exceeding 6000 psi (41 MPa).
   • Improved durability: Enhanced resistance to environmental factors, such as freeze-thaw cycles, chemical attack, and abrasion.
4. Applications: LSHPC is suitable for a wide range of applications, including:
   • High-rise buildings and tall structures.
   • Long-span bridges and highway infrastructure.
   • Industrial facilities and equipment foundations.
   • High-performance architectural concrete.

Benefits:

1. Reduced maintenance and repair costs: LSHPC's improved durability and resistance to cracking reduce the need for costly repairs and maintenance.
2. Increased lifespan: LSHPC's enhanced durability extends the lifespan of structures, reducing the need for premature replacement.
3. Improved aesthetics: LSHPC's low-shrinkage properties minimize the appearance of cracks and surface defects.

ACI 213R-14 PDF:

The ACI 213R-14 PDF document provides a detailed guide for specifying, designing, and constructing LSHPC projects. It includes information on material selection, mix design, construction practices, and testing procedures.

If you're looking for a downloadable PDF copy, you can try the following options: aci 213r-14 pdf

1. ACI Website: Visit the American Concrete Institute (ACI) website and search for ACI 213R-14. You can purchase a downloadable PDF copy or a printed version of the guide.
2. Technical libraries: Many technical libraries and institutions provide access to ACI publications, including the 213R-14 guide.
3. Online databases: Some online databases, such as IHS Standards Store or ANSI Webstore, may offer ACI 213R-14 PDF downloads.

Please note that availability and pricing may vary depending on your location and the source you choose.

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14. Limitations and Research Needs

• Variability: LWA properties can vary between sources — ongoing testing needed.
• Performance data gaps: More long-term field data on creep, shrinkage, and durability for certain LWAs and SCM combinations.
• Suggested research: Long-term monitoring, optimization of mixes for combined performance (strength, durability, shrinkage), and improved test correlations.

Key Technical Summary

Paper: ACI 213R-14 — Guide for Structural Lightweight-Aggregate Concrete (PDF Review and Summary)