When the structural element is not subject to durability concerns, specified compressive strength is the preferred performance criteria. For this purpose, en 1504 standard products and systems for protection and repair of concrete structures 1 was recently published and provides procedures and requirements for such type of. Concrete cracking, a common and frequently occurring disease, is one of the main factors that cause impaired concrete structure durability. Org by keith kesner and kevin conroy introduction in 2006, an american concrete institute aci technical committee began working on the develop ment of a building code for the repair of existing concrete structures. Why investigation of reinforced concrete structures for repair and maintenance required.
This book is concerned with the long term durability of concrete as a structural material as used in the construction of buildings, bridges, roads, marine and civil engineering structures. Investigations on the impact of nonlongitudinal cracks on. Durability and restoration of concrete structures prof. Pdf durability of concrete structures researchgate. This thoroughly revised and updated new edition brings together the fundamental aspects of this world wide problem and offers advice on how investigations, diagnosis and consequent. Effect of the environment on reinforced concrete durability. Durability of reinforced concrete structures assessment and. Investigation, repair, protection mays, geoffrey on. Durability of repaired concrete structures sciencedirect. Download citation on researchgate durability of concrete structures. Specifying concrete for durability national ready mixed.
Factors affecting the durability of reinforced concrete 5. The exceptional durability of portland cement concrete is a major reason why it is the worlds most widely used construction material. Download repair, protection and waterproofing of concrete. Although most concrete structures present a satisfactory performance, there are deterioration problems in many structures, commonly manifested by cracking, due to the most different causes. Consequently, the need for repair and protection has grown considerably in recent years. Durability of concrete durability of concrete may be defined as the ability of concrete to resist.
Besides, there were a few conferences on the topic. Concrete problems and repair techniques structural engineering. Investigation, repair, protection ebook written by g. However, the protection of reinforced concrete structures is a very wide field, as presently there are many types of systems commercially available. Why investigation of reinforc ed concrete structures for repair and maintenance required. Its objectives were to quantify the durability of marine structures in the netherlands and to provide degradation models and associated failure probabilities for. Extensive experience demonstrates that the durability of concrete structures is related not only to design and material but also to construction issues. Investigation, repair, protection 20171023 pdf cacti and succulents for cold climates. Durability presentation free download as powerpoint presentation. The committee published the first version in 20 aci 562, and an updated. Investigation, repair, protection enter your mobile number or email address below and well send you a link to download the free kindle app. This paper analyzes the generation process and features of nonlongitudinal concrete cracking. Durability of reinforced concrete structures, theory vs practice albert k. Durability of concrete structures investigation repair protection.
A large number of concrete structures are deteriorating, often prematurely, and need remedial measures to reinstate their safety andor serviceability. Jan 15, 2011 extensive experience demonstrates that the durability of concrete structures is related not only to design and material but also to construction issues. Durability and debond evaluation of highrise concrete buildings using infrared thermography duration. Number ec171 september 20 transportation research board. Durability of concrete structures investigation repair protection this book is concerned with the long term durability of concrete as a structural material as used in the construction of buildings, bridges, roads, marine and civil engineering structures. Durability of concrete structures free ebook download as pdf file. The examinations in this research project refer to construction practice where local damage due to reinforcement corrosion, e. Wong department of civil engineering, the university of hong kong, hong kong abstract.
This work presents preliminary results of the international project. One of the best monographs dedicated to durability 2 presents the behaviour of concrete, deterioration mechanisms, structural investigations, repair and protection of cs. In norway such durability design has been applied to a number of concrete structures where safety, durability and service life have been of special importance 11,30. Throughout this code, the term structure means an existing building, member, system, and, where applicable, nonbuilding structures where the construction is concrete or mixed construction with concrete and other materials. A strategy for durability assessment of repaired concrete structures is also outlined, including examples of various instrumentation and data analysis techniques that. It is also clear that many issues not related to materials selection or proportioning can have major effects on durability of concrete. The durability of concrete as a construction material and the durability of reinforced concrete structures under different environmental conditions are probably. First results of the investigation of the corrosion behavior of steel in concrete after local repair measures are described. The nook book ebook of the durability of concrete structures.
Concrete structures must meet the quality requirements related to the aspects of durability, functionality and stability. Investigation and diagnosis of a reinforced concrete reservoir with. Investigation of reinforced concrete structures for repair. Different concretes require different degrees of durability depending on the exposure environment and properties desired. Durability of concrete structures investigation, repair, protection. Cracks repair in reinforced concrete structures case study. Durability and repairs of concrete structures author and presenter the author and presenter of the training material is the wellknown international lecturer bruce raath, who has membership of institute of concrete technologists london and assoc. Concrete structure is widely used in civil engineering. Repair principles for corrosiondamaged reinforced concrete. Durability presentation corrosion reinforced concrete.
Maintenance and repair of concrete structures learning outcome the course should provide the students with an understanding of the typical mechanisms of deterioration of reinforced concrete structures and ability to predict the service life and suggest mitigating measures and repair strategies. Reinforced concrete structures have not been immune to the ravages of corrosion despite the protection that concrete provides to embedded steel. Reasons for the increasing incidence of corrosion damage to reinforced concrete structures include the use of deicing salts and calcium chloride setaccelerators, increased construction in aggressive. It discusses the fundamental reasons for the deterioration of concrete over time and available techniques for detecting, remedying and preventing the deteriorati. Durability of concrete structures corrosion concrete. V international phd student workshop on durability of reinforced. An aci provisional standard american concrete institute. Throughout this code, the term structure means an existing building, member, system, and, where applicable, nonbuilding. Second edition reactions and reduction in paste contents increasing of dimensional stability are expected with better gradations of aggregates. A strategy for durability assessment of repaired concrete structures is also outlined, including examples of various instrumentation and data analysis techniques that are found particularly useful for field research. Pdf durability of concrete in cold climates modern.
Durability problems of 20 century reinforced concrete. Durability of reinforced concrete structures assessment and repair training in london uk, dubai united arab emirates, kuala lumpur malaysia, istanbul turkey, france paris. All aggregate materials should be free from dis colouring. Durability of reinforced concrete structures,theory vs practice. A designer should be aware of the constructional aspects of structures, as well as, in order to foresee durability problems due to any peculiarities of structural loads, layout as well as environment.
These causes can affect the appearance of concrete and can also indicate significant structural and durability problems 1. Duracon, which shows the physical, mechanical and chemical characterization of two different concrete mixtures prepared in the participating countries, as well as the environment to which the specimens are exposed. Concrete is one of the most versatile man made construction materials of our times. Concrete by its flowability, in most complicated forms while wet, and its strength, development and durability characteristics when hardened, has gained a reputation as the. Repair, protection and waterproofing of concrete structures. Durability of local repair measures on concrete structures. Static and dynamic analysis of engineering structures the integrated test analysis process for structural dynamic systems mary anderson william woessner randall hunt applied groundwater modeling, 2nd edition. Download for offline reading, highlight, bookmark or take notes while you read durability of concrete structures. Investigation, repair, protection crc press book this book is concerned with the long term durability of concrete as a structural material as used in the construction of buildings, bridges, roads, marine and civil engineering structures. Aesthetic durability of white concrete structures aalborg white. But material limitations, design and construction practices, and severe exposure conditions can cause concrete to deteriorate, which. In 2002, the jsce standard specification for concrete structures jsce 2002 provided tools for verifying durability of concrete structures numerically, which was the first real code for the durability design in the world. Membership of the institution of structural engineers london. Do not specify maximum wcm or minimum cementitious.