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Calibration of Pull-Out tests on Historical-like Concrete
https://orcid.org/http://orcid.org/0000-0002-7656-4158
The compressive strength of concrete in existing r.c. structures may be estimated by means of Non-Destructive and Moderately Destructive techniques. While a large bibliography is available for “modern concrete”, for historical concrete, produced in the pre-code period till the ‘20 s, the task is more complex due to lack of standardization, improper rules of thumbs for proportioning of aggregates and to a substantial lack of data. Also the applicability of the procedures calibrated on modern concrete to historical concrete is an issue that is hardly addressed. In this paper, an experimental campaign on historical-like concrete makes use of pull-out tests to estimate the compressive strength. The effect of round aggregates, that are typical of historical concrete, of the casting direction and of the position of the tests (near the surface or inside the specimen) are discussed showing that standard procedures commonly used on modern concrete can be used on historical concrete only if specific calibration is performed. Besides, near-the-surface and inner tests are compared to the standard cube strength, showing the reliability of the pull-out procedure also for this kind of concretes.
Calibration of Pull-Out tests on Historical-like Concrete
https://orcid.org/http://orcid.org/0000-0002-7656-4158
The compressive strength of concrete in existing r.c. structures may be estimated by means of Non-Destructive and Moderately Destructive techniques. While a large bibliography is available for “modern concrete”, for historical concrete, produced in the pre-code period till the ‘20 s, the task is more complex due to lack of standardization, improper rules of thumbs for proportioning of aggregates and to a substantial lack of data. Also the applicability of the procedures calibrated on modern concrete to historical concrete is an issue that is hardly addressed. In this paper, an experimental campaign on historical-like concrete makes use of pull-out tests to estimate the compressive strength. The effect of round aggregates, that are typical of historical concrete, of the casting direction and of the position of the tests (near the surface or inside the specimen) are discussed showing that standard procedures commonly used on modern concrete can be used on historical concrete only if specific calibration is performed. Besides, near-the-surface and inner tests are compared to the standard cube strength, showing the reliability of the pull-out procedure also for this kind of concretes.
Calibration of Pull-Out tests on Historical-like Concrete
https://orcid.org/http://orcid.org/0000-0002-7656-4158
The compressive strength of concrete in existing r.c. structures may be estimated by means of Non-Destructive and Moderately Destructive techniques. While a large bibliography is available for “modern concrete”, for historical concrete, produced in the pre-code period till the ‘20 s, the task is more complex due to lack of standardization, improper rules of thumbs for proportioning of aggregates and to a substantial lack of data. Also the applicability of the procedures calibrated on modern concrete to historical concrete is an issue that is hardly addressed. In this paper, an experimental campaign on historical-like concrete makes use of pull-out tests to estimate the compressive strength. The effect of round aggregates, that are typical of historical concrete, of the casting direction and of the position of the tests (near the surface or inside the specimen) are discussed showing that standard procedures commonly used on modern concrete can be used on historical concrete only if specific calibration is performed. Besides, near-the-surface and inner tests are compared to the standard cube strength, showing the reliability of the pull-out procedure also for this kind of concretes.
Calibration of Pull-Out tests on Historical-like Concrete
Mater Struct
Brencich, A. (author) / Hasweh, F. (author) / Pera, D. (author)
2021-04-01
Article (Journal)
Electronic Resource
English
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