Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Alkali-Silica Reaction and High Performance Concrete
Damage due to alkali-silica reaction (ASR) in concrete is a phenomenon that was first recognized in the U.S. since 1940 and has since been observed in many countries. Despite numerous studies published, the machanism is not yet clearly understood. Nevertheless, the three major factors in concrete have been identified, i.e., the alkalies contained in the pore solution, reactive amorphous or poorly crystallized silica present in certain aggregates, and water. In this study, we attempted to address the question of whether high-performance concrete (HPC) is susceptible to ASR. It was found that air content is the most important variable (other than the three majors factors cited above) that increase expansion of concretes affected by ASR. This study seems to indicate that even HPC is susceptible to ASR if reactive aggregates are used.
Alkali-Silica Reaction and High Performance Concrete
Damage due to alkali-silica reaction (ASR) in concrete is a phenomenon that was first recognized in the U.S. since 1940 and has since been observed in many countries. Despite numerous studies published, the machanism is not yet clearly understood. Nevertheless, the three major factors in concrete have been identified, i.e., the alkalies contained in the pore solution, reactive amorphous or poorly crystallized silica present in certain aggregates, and water. In this study, we attempted to address the question of whether high-performance concrete (HPC) is susceptible to ASR. It was found that air content is the most important variable (other than the three majors factors cited above) that increase expansion of concretes affected by ASR. This study seems to indicate that even HPC is susceptible to ASR if reactive aggregates are used.
Alkali-Silica Reaction and High Performance Concrete
C. F. Ferraris (Autor:in)
1995
28 pages
Report
Keine Angabe
Englisch
Highway Engineering , Construction Equipment, Materials, & Supplies , Materials Degradation & Fouling , Transportation & Traffic Planning , Transportation , Alkali aggregate reactions , Silicon dioxide , Concretes , Air , Cement aggregate reactions , Concrete durability , Standards , Tests , Chemical reactions , Performance , Construction materials , ASR(Alkali-silica reaction) , HPC(High performance concrete) , National Institute of Standards and Technology
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