Abstract
The potential alkali-reactivity of Torre Lago sand was evaluated by test methods directly based-on the aggregate (petrographic examination, infrared spectroscopy, X-ray diffraction analysis, chemical test ASTM C 289), or by mortar bar expansion tests (ASTM C 227, lN NaOH bath at 80 degrees C, saturated NaCl bath at 50 degrees C). Except for the ASTM C 227 method, all the test methods indicate that Torre Lago sand is a potentially deleterious aggregate from the view point of alkali-aggregate reaction. A critical examination of the results suggests that this sand is not deleterious when standard mortar bars are stored in water, as prescribed by Italian Standards for the evaluation of the mechanical strengths of cements. Conversely, this sand could be deleterious when the cementitious mixes are to be exposed to particular environmental conditions, such as in the presence of de-icing salts.
Citation Formats
Berra, M, Mangialardi, T, Paolini, A E, and Pellorca, F.
Potential alkali-reactivity of Torre Lago (Italy) sand; Sulla potenziale reattivita` agli alcali della sabbia di Torre del Lago.
Italy: N. p.,
1991.
Web.
Berra, M, Mangialardi, T, Paolini, A E, & Pellorca, F.
Potential alkali-reactivity of Torre Lago (Italy) sand; Sulla potenziale reattivita` agli alcali della sabbia di Torre del Lago.
Italy.
Berra, M, Mangialardi, T, Paolini, A E, and Pellorca, F.
1991.
"Potential alkali-reactivity of Torre Lago (Italy) sand; Sulla potenziale reattivita` agli alcali della sabbia di Torre del Lago."
Italy.
@misc{etde_10107182,
title = {Potential alkali-reactivity of Torre Lago (Italy) sand; Sulla potenziale reattivita` agli alcali della sabbia di Torre del Lago}
author = {Berra, M, Mangialardi, T, Paolini, A E, and Pellorca, F}
abstractNote = {The potential alkali-reactivity of Torre Lago sand was evaluated by test methods directly based-on the aggregate (petrographic examination, infrared spectroscopy, X-ray diffraction analysis, chemical test ASTM C 289), or by mortar bar expansion tests (ASTM C 227, lN NaOH bath at 80 degrees C, saturated NaCl bath at 50 degrees C). Except for the ASTM C 227 method, all the test methods indicate that Torre Lago sand is a potentially deleterious aggregate from the view point of alkali-aggregate reaction. A critical examination of the results suggests that this sand is not deleterious when standard mortar bars are stored in water, as prescribed by Italian Standards for the evaluation of the mechanical strengths of cements. Conversely, this sand could be deleterious when the cementitious mixes are to be exposed to particular environmental conditions, such as in the presence of de-icing salts.}
place = {Italy}
year = {1991}
month = {Dec}
}
title = {Potential alkali-reactivity of Torre Lago (Italy) sand; Sulla potenziale reattivita` agli alcali della sabbia di Torre del Lago}
author = {Berra, M, Mangialardi, T, Paolini, A E, and Pellorca, F}
abstractNote = {The potential alkali-reactivity of Torre Lago sand was evaluated by test methods directly based-on the aggregate (petrographic examination, infrared spectroscopy, X-ray diffraction analysis, chemical test ASTM C 289), or by mortar bar expansion tests (ASTM C 227, lN NaOH bath at 80 degrees C, saturated NaCl bath at 50 degrees C). Except for the ASTM C 227 method, all the test methods indicate that Torre Lago sand is a potentially deleterious aggregate from the view point of alkali-aggregate reaction. A critical examination of the results suggests that this sand is not deleterious when standard mortar bars are stored in water, as prescribed by Italian Standards for the evaluation of the mechanical strengths of cements. Conversely, this sand could be deleterious when the cementitious mixes are to be exposed to particular environmental conditions, such as in the presence of de-icing salts.}
place = {Italy}
year = {1991}
month = {Dec}
}