Description Mass concrete is defined in ACI 116R as “any volume of concrete with dimensions large enough to require that measures be taken to cope with generation of heat from hydration of the cement and attendant volume change to minimize cracking.” The design of mass concrete structures is generally based on durability, economy, and thermal […]
Guide to Mass Concrete Read More »
Description Concrete is one of the most widely used constructionmaterials in the world. This fact attests to concrete’sperformance as a versatile building material. Durabilityrepresents one of the key characteristics of concrete that hasled to its widespread use. Durability of hydraulic-cementconcrete is determined by its ability to resist weathering action,chemical attack, abrasion, or any other process
Guide to Durable Concrete Read More »
Description By completing a visual inspection of the concrete immedi-ately after construction, and through repetition at intervalsduring the concrete’s service life, the visual inspectionprovides important historical information on performanceand durability. The inspection results also aid in earlydetection of distress and deterioration, enabling repair orrehabilitation before replacement is necessary. It is important that the inspector properly
Guide for Conducting a Visual Inspection of Concrete in Service Read More »
Description Evaluating tolerance compatibility at the interface between concrete and other building systems is challenging because materials, products, and elements that connect to the concrete often have tolerances that differ from those for concrete. Coordinating these different tolerances early in the project reduces problems that can impact quality, cost, and schedule during construction. Architects and
Guide for Tolerance Compatibility in Concrete Construction Read More »
Description Shotcrete has grown into an important and widely usedconstruction technique. Because of continuing research anddevelopment in materials, equipment, and constructionprocedures, this guide is revised periodically to reflectcurrent industry practice. The guide was originally preparedto replace “Recommended Practice for Shotcreting” (ACI506-66, Revised 1983). This guide, based on many years of practice and experi-ence, covers aspects
Guide to Shotcrete Read More »
Description Design procedures proposed for regulatory standardsshould be safe, correct in concept, simple to understand, andshould not necessarily add to either design or construction costs. These procedures are most effective if they are basedon relatively simple conceptual models rather than oncomplex empirical equations. This report introduces design engineers to some approaches for the shear design
Recent Approaches to Shear Design of Structural Concrete Read More »
Description The majority of reported studies12-27 in the field of HSC columns concern the behavior of columns subjected to con-centric loads. Understanding the behavior of columns under concentric loads assists in quantifying the parameters affect-ing column performance. However, conclusions from thistype of loading should not necessarily be extended to the case of combined loading, a
Report on High-Strength Concrete Columns Read More »
Description The purpose of this report is to present the current state of knowledge with regard to applications of fiber-reinforced polymer (FRP) materials in concrete. This report summarizes the fundamental behavior, the most current research, designcodes, and practical applications of concrete and masonry structures containing FRP. This document is intended to complement other reports (for
Report on Fiber-Reinforced Polymer (FRP) Reinforcement for Concrete Structures Read More »
Description Conventional concrete structures are reinforced with non prestressed and prestressed steel. The steel is initially protected against corrosion by the alkalinity of the concrete, usually resulting in durable and serviceable construction. For many structures subjected to aggressive environments, such as marine structures, bridges, and parking garages exposed to deicing salts, combinations of moisture, tempera-ture,
Description This report provides recommendations to establish the loads that can be sustained safely by the structural elements of an existing concrete building. The procedures can be applied generally to other concrete structures, provided that appropriate evaluation criteria are agreed upon before the start of the investigation. This report covers structural concrete, including conventionally reinforced
Strength Evaluation of Existing Concrete Buildings Read More »
Description Design for serviceability is central to the work of struc-tural engineers and code-writing bodies. It is also essential tousers of the structures designed. Increased use of high-strength concrete with reinforcing bars and prestressed rein-forcement, coupled with more precise computer-aided limit-state serviceability designs, has resulted in lighter and morematerial-efficient structural elements and systems. This inturn
Control of Deflection in Concrete Structures Read More »
Description The bond between reinforcing bars and concrete has beenacknowledged as a key to the proper performance of reinforcedconcrete structures for well over 100 years (Hyatt 1877).Much research has been performed during the interveningyears, providing an ever-improving understanding of thisaspect of reinforced concrete behavior. ACI Committee 408issued its first report on the subject in 1966.
Bond and Development of Straight Reinforcing Bars in Tension Read More »
Description ACI Committee 376 was formed and subsequently ACI 376-11 was drafted in response to a request from the National Fire Protection Association (NFPA) Technical Committee 59A on liquefied natural gas (LNG). That committee is responsible for NFPA 59A, which is an internationally recognized standard governing the production, storage, and handling of LNG at an
Description ACI Committee 376 was formed and subsequently ACI 376-11 was drafted in response to a request from the National Fire Protection Association (NFPA) Technical Committee 59A on liquefied natural gas (LNG). That committee is responsible for NFPA 59A, which is an internationally recognized standard governing the production, storage, and handling of LNG at an
Description The design and construction of circular prestressed concrete structures requires specialized engineering knowl-edge and experience. The recommendations herein reflect over 6 decades of experience in designing and constructing circular prestressed structures. When designed and built with understanding and care, these structures can be expected to serve for well over 50 years without requiring significant
Description This document provides guidance for specifying, designing, and constructing elevated concrete and composite steel-concrete water storage tanks. Elevated tanks are used by municipalities and industry for potable water supply and fire protection. Commonly built sizes of elevated concrete and composite steel-concrete water storage tanks range from500,000 to 3,000,000 gal. (1900 to 11,000 m3). Concrete
Description The design of concrete structures for blast resistance has been of great interest to the military and other federal agencies for several decades. In addition, certain specialized segments within the engineering community have also had to consider blast loads on structures as a result of potential accidents. For example, the petrochemical industry has designed
Report for the Design of Concrete Structures for Blast Effects Read More »
