Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Laboratory Investigations on Latex Modified Concrete. Final Report
Laboratory investigations were carried out (a) to determine the effects of fly ash on the properties of latex modified concrete used for bridge deck overlays, and (b) to explore modified formulations incorporating superplasticizers, silica fume, and combinations of these with reduced latex content (for economy). It was found that incorporating either Class F and Class C fly ashes at 15% and 25% levels produced no deleterious effects, and provided positive benefits in the form of much reduced chloride permeability and the possibility of better bonding to existing concrete. Exploratory investigations of the effects of naphthalene sulfonate superplasticizer on latex modified concretes resulted in highly favorable indications. Major increases were recorded in both compressive and flexural strengths (the latter to over 2,000 psi at 180 days), and the chloride permeability was reduced by a factor of 2. It was found that reducing the latex content in half (for economy) resulted in retaining the compressive strength and chloride permeability improvements but not the increased flexural strength. Incorporating 10% silica fume with the superplasticizer treatment produced no significant increase in strength but reduced chloride permeability to extremely low values.
Laboratory Investigations on Latex Modified Concrete. Final Report
Laboratory investigations were carried out (a) to determine the effects of fly ash on the properties of latex modified concrete used for bridge deck overlays, and (b) to explore modified formulations incorporating superplasticizers, silica fume, and combinations of these with reduced latex content (for economy). It was found that incorporating either Class F and Class C fly ashes at 15% and 25% levels produced no deleterious effects, and provided positive benefits in the form of much reduced chloride permeability and the possibility of better bonding to existing concrete. Exploratory investigations of the effects of naphthalene sulfonate superplasticizer on latex modified concretes resulted in highly favorable indications. Major increases were recorded in both compressive and flexural strengths (the latter to over 2,000 psi at 180 days), and the chloride permeability was reduced by a factor of 2. It was found that reducing the latex content in half (for economy) resulted in retaining the compressive strength and chloride permeability improvements but not the increased flexural strength. Incorporating 10% silica fume with the superplasticizer treatment produced no significant increase in strength but reduced chloride permeability to extremely low values.
Laboratory Investigations on Latex Modified Concrete. Final Report
S. Diamond (Autor:in) / Q. Sheng (Autor:in)
1989
232 pages
Report
Keine Angabe
Englisch
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