What are cement-based product Environmental Product Declarations (EPDs) and how are they used to support sustainability-related efforts?
Keywords:
Environmental Product Declarations (EPDs); life cycle assessment (LCA); sustainability.
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The circular concrete-filled fiber-reinforced polymer (FRP) tube (CFFT) system is an alternative to traditional reinforced concrete structures. The pre-cured FRP tube, which comprises layers of engineered fibers oriented in different directions, provides a corrosion-resistant stay-in-place structural form to retain freshly cast concrete that speeds up construction while at the same time provides primary reinforcement in the two orthogonal directions instead of traditional longitudinal steel reinforcing bar, ties, and stirrups. Typical applications of CFFT include piles, columns, and poles used in building and bridge construction. The FRP tube provides confinement and environmental protection of the concrete core, increasing its strength, ductility, and durability, as well as protection of the minimum internal steel reinforcement. Due to the unique characteristics of CFFTs in which reinforcement in the orthogonal directions are integrated into one continuous membrane—namely, the tube—specific guidance on the design of members using this system is needed. This guide provides general information and background of CFFT technology, including applications and limitations, characteristics of circular FRP tubes, and the interface bond between tube and concrete. The guide provides provisions for design for flexure, axial load, shear, combined loading, connections, and a design approach aimed at mitigating the risk of accidental tube loss. This guide is based on the knowledge gained from experimental research, analytical work, and field applications of CFFTs.
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This guide presents information on selection and use of normalweight and heavyweight aggregates in concrete. The selection and use of aggregates in concrete should be based on technical criteria as well as economic considerations and knowledge of types of aggregates generally available in the area of construction. The properties of aggregates and their processing and handling influence the properties of both fresh and hardened concrete. The effectiveness of processing, stockpiling, and aggregate quality control procedures will affect batch-to-batch and day-to-day variation in the properties of concrete. Aggregates that do not comply with the specification requirements may be suitable for use if the properties of the concrete using these aggregates are acceptable, as per Chapter 6. Materials that can be recycled or produced from waste products are potential sources of concrete aggregates; however, special evaluation may be necessary.
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This reference specification covers quality assurance inspection services for preplacement, placement, and post-placement of concrete construction. This reference specification can be made applicable to a particular construction project by citing it in the inspection services contract. The specifier shall supplement the provisions of this reference specification as needed by specifying individual project requirements in the inspection services contract.
The materials, processes, quality control measures, and inspections described in this Specification should be tested, monitored, or performed as applicable only by individuals holding the appropriate ACI Certifications or equivalent.
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Autodesk Advance Steel 2026 is built to speed up the process of designing, manufacturing, and working on steel structures on the AutoCAD workspace. This software helps you increase your design accuracy and reduce the time required to complete a modeling project.
Key features of Autodesk Advance Steel 2026 software :
Advanced design and analysis of various steel structures
Engineering and 3D design of massive structures
Predicting the behavior of designed structures
Performing structural engineering calculations such as useful life and service time
Providing the necessary solutions for the correct selection of raw materials
Conducting comparisons of raw materials in terms of cost and mechanical properties
Fatigue and creep life calculation
Reduce costs and increase design speed
Increasing production efficiency and improving previous design
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AutoCAD 2026 introduces significant advancements in performance, AI-powered features, and collaboration tools. Key improvements include faster file loading and startup, enhanced Smart Blocks, and improved Autodesk Docs integration for streamlined workflows.
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Guide Specifications for Design of Bonded FRP Systems for Repair and Strengthening of Concrete Bridge Elements
Title:
AASHTO FRPS-2
Guide Specifications for Design of Bonded FRP Systems for Repair and Strengthening of Concrete Bridge Elements, 2nd Edition
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These guide specifications are intended for use in the repair and strengthening of reinforced and prestressed concrete highway bridge elements using externally bonded fiber-reinforced polymer (FRP) composite systems. The guide specifications have been updated to better align with ACI 440 strain approaches, and major updates include the following:
Flanged sections in flexure
Prestressed concrete sections
Inclusion of factors to account for environmental exposure conditions
Near surface mounted (NSM) FRP designs
Design of end anchors
Detailing of laps and splices
Updated approach to FRP–concrete interface strain
Inclusion of design examples for shear and flexural strengthening, and confinement
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The “Structural Precast Concrete—Code Requirements and Commentary” (“Code”) provides minimum requirements for the materials, design, and detailing of structural precast concrete buildings and, where applicable, nonbuilding structures. This Code was developed using a consensus process and addresses plant-produced and site-produced structural precast concrete that contains nonprestressed reinforcement or pretensioned reinforcement, or both. The Design Standard Committee of Precast/Prestressed Concrete Institute was instrumental in the development of code provisions and commentary for this Code and whose efforts are gratefully acknowledged. Among the subjects covered are: design and construction for strength, serviceability, and durability; load combinations, load factors, and strength reduction factors; structural analysis methods; deflection limits; mechanical and adhesive anchoring to concrete; development and splicing of reinforcement; construction document information; field inspection and testing; and methods to evaluate the strength of existing structures.
This Code adheres to the chapter and section numbering of ACI CODE-318-25 and either cites or repeats applicable provisions from ACI CODE-318. Provisions that are identical to ACI CODE-318 and are repeated in this Code are denoted with an equal sign (“=”). Provisions that are applicable to precast concrete but are not repeated in the Code are denoted as “See ACI CODE-318.” Design and detailing requirements for structural systems or for individual members are presented in chapters devoted to those individual subjects, and the chapters are arranged in a manner that generally follows the process and chronology of design and construction. Information and procedures that are common to the design of multiple member types are located in utility chapters. Within chapters, the terms “out of scope” and “not applicable” are used for numbered section headings from ACI CODE-318 that are not covered by this Code, while the term “intentionally left blank” is used as a place holder to maintain consistency with section numbering in situations where ACI CODE-318 includes a numbered provision that is not also in this Code.
Uses of the Code include adoption by reference in a general building code, and it is in a format that allows such reference without change to its language. Therefore, background details or suggestions for carrying out the requirements or intent of the Code provisions cannot be included within the Code itself. The Commentary is provided for this purpose.
Some considerations of the committee in developing the Code are discussed in the Commentary, with emphasis given to the explanation of provisions. Given the similarity in design requirements for structural concrete that is either cast-in-place or precast, the commentary explains the difference in application. The commentary also provides explanations regarding situations where use of both ACI CODE-318 and this Code is necessary. For instance, design of cast-in-place, nonprestressed concrete members or structures requires the use of ACI CODE-318 alone. Design of precast concrete structures requires the use of this Code and ACI CODE-318. Design of precast, post-tensioned concrete structures requires the use of applicable provisions of ACI CODE-318, ACI/PCI CODE-319, and ACI/PTI CODE-320. For provisions that specifically address post-tensioning and are generally not within the scope of precast concrete, this code references either ACI CODE-318 or ACI/PTI CODE-320, as applicable.
Much of the research data referenced in preparing the Code is cited for the user desiring to study individual questions in greater detail. Other documents that provide suggestions for carrying out the requirements of the Code are also cited, including PCI Standards and PCI or Tilt-up Concrete Association (TCA) design manuals, recommended practices, and reports.
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This Symposium Volume reports on the latest advancements related to the various facets of modeling and performance assessment of concrete structures. The volume contains 10 papers that were presented at the ACI Convention held in Toronto on April 1st, 2025. The symposium was dedicated to celebrate Prof. Frank J. Vecchio’s extraordinary research contributions and accomplishments in the development of behavioral models and analytical tools for the assessment of concrete structures.
The papers cover different aspects related to modeling and performance assessment of concrete structures including developments of the Modified Compression Field Theory, finite element modeling of punching shear in slabs, behavior and modeling of steel fiber reinforced concrete members subjected to torsion, modeling of concrete structures subjected to impact loading, behavior and modeling of slender walls, modeling of concrete frame elements, behavior and modeling of GFRP reinforced members, crack-based assessment of concrete structures, and advancements in modeling deterioration mechanisms and repaired concrete structures.
Sincere acknowledgements are extended to all authors, speakers and reviewers as well as to ACI staff for making this symposium a success.
Anca-Cristina Ferche, Editor
Vahid Sadeghian, Editor
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