A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Carbonation Results in Diverse Cement Pastes with 10% Substitution of Binder by Bentonite
The greenhouse effect is accelerating to reduce environmental footprint of concrete. In addition to the traditional mineral additions which are blast furnace slags, pozzolans and fly ashes, worldwide are tested new products in order to have a wider variety of substances capable of maintaining the performance and good durability of the concrete. Among these substance, calcined clays are proposed due to their availability in numerous places. However, the pre-calcination ads waste of energy and therefore the use of non-calcined clays appears as a possibility very little explored, as few literature references are found. In present work non calcined bentonite has been tested by substituting 10% of different Portland cements. Paste specimens have been submitted during 3 and 6 months to natural carbonation in three different exposures: indoors and outdoors sheltered and unsheltered from rain. The results show that the presence of bentonite either improves the carbonation resistance or does not modify it. With respect to the resistance to chloride ingress, the tests have been in mortar in accelerated conditions through an electrical field. The results indicate that the presence of bentonite also resulted beneficial.
Carbonation Results in Diverse Cement Pastes with 10% Substitution of Binder by Bentonite
The greenhouse effect is accelerating to reduce environmental footprint of concrete. In addition to the traditional mineral additions which are blast furnace slags, pozzolans and fly ashes, worldwide are tested new products in order to have a wider variety of substances capable of maintaining the performance and good durability of the concrete. Among these substance, calcined clays are proposed due to their availability in numerous places. However, the pre-calcination ads waste of energy and therefore the use of non-calcined clays appears as a possibility very little explored, as few literature references are found. In present work non calcined bentonite has been tested by substituting 10% of different Portland cements. Paste specimens have been submitted during 3 and 6 months to natural carbonation in three different exposures: indoors and outdoors sheltered and unsheltered from rain. The results show that the presence of bentonite either improves the carbonation resistance or does not modify it. With respect to the resistance to chloride ingress, the tests have been in mortar in accelerated conditions through an electrical field. The results indicate that the presence of bentonite also resulted beneficial.
Carbonation Results in Diverse Cement Pastes with 10% Substitution of Binder by Bentonite
RILEM Bookseries
Escalante-Garcia, J. Ivan (editor) / Castro Borges, Pedro (editor) / Duran-Herrera, Alejandro (editor) / Andrade, Carmen (author) / Martinez, Ana (author) / Sanjuan, Miguel Ángel (author) / Tenorio, José A. (author)
RILEM Annual Week ; 2021 ; Merida, Mexico
Proceedings of the 75th RILEM Annual Week 2021 ; Chapter: 21 ; 183-192
RILEM Bookseries ; 40
2023-03-11
10 pages
Article/Chapter (Book)
Electronic Resource
English
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