Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Evaluation of the SHRP: Alkali-Silica Reactivity (ARS) Test
The objective of this research project was to evaluate the potential of the proposed SHRP rapid immersion test covered by AASHTO TP 14 to determine alkali-silica reactivity (ASR) or Kansas aggregates using concrete beam samples. The TP 14 standard provides a proposed standard test method for accelerated detection of potentially deleterious expansion of mortar bars due to alkali-silica reaction. This research study consisted of testing larger specimen concrete beams, 76 mm x 102 mm x 406 mm (3 inches x 4 inches x 16 inches), as per AASHTO TP 14. The variables evaluated included the percentage of limestone aggregate, source of the sand-gravel aggregates, and percent and source of fly ash (Type C). The results indicate that all of the mixes except two had less than 0.10% expansion after 16 days. The results indicated an increasing expansion from the initial to the final day for all mixes. Further tests on beams of three mixes continued after 16 days showed no increase in expansion up to 30 days. This limited test study indicates the AASHTO TP 14 procedure has the potential to detect deleterious behavior of aggregates due to alkali-silica reactivity.
Evaluation of the SHRP: Alkali-Silica Reactivity (ARS) Test
The objective of this research project was to evaluate the potential of the proposed SHRP rapid immersion test covered by AASHTO TP 14 to determine alkali-silica reactivity (ASR) or Kansas aggregates using concrete beam samples. The TP 14 standard provides a proposed standard test method for accelerated detection of potentially deleterious expansion of mortar bars due to alkali-silica reaction. This research study consisted of testing larger specimen concrete beams, 76 mm x 102 mm x 406 mm (3 inches x 4 inches x 16 inches), as per AASHTO TP 14. The variables evaluated included the percentage of limestone aggregate, source of the sand-gravel aggregates, and percent and source of fly ash (Type C). The results indicate that all of the mixes except two had less than 0.10% expansion after 16 days. The results indicated an increasing expansion from the initial to the final day for all mixes. Further tests on beams of three mixes continued after 16 days showed no increase in expansion up to 30 days. This limited test study indicates the AASHTO TP 14 procedure has the potential to detect deleterious behavior of aggregates due to alkali-silica reactivity.
Evaluation of the SHRP: Alkali-Silica Reactivity (ARS) Test
M. Hossain (Autor:in) / M. H. Zubery (Autor:in)
1995
50 pages
Report
Keine Angabe
Englisch
Highway Engineering , Corrosion & Corrosion Inhibition , Adhesives & Sealants , Concrete pavements , Immersion test(Corrosion) , Alkali aggregate reactions , Test method , Silicon dioxide , Chemical reactiviy , Concrete durability , Determination , Fly ash , Expansion , ASR(Alkali-Silica Reactivity) , AASHTO TP 14 , SHRP rapid immersion test
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