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Dedolomitization and alkali-silica reactions in low-expansive marbles from the province of Córdoba, Argentina. A microstructural and chemical study
(Elsevier, 2014-02)
Marbles from the province of Córdoba (Argentina) have been used as aggregates in concrete; however, there is little information about their potential reactivity and interaction with the cement paste. Recently, the ...
Expansive behavior of an alkali-carbonate reactive dolostone from Argentina: Proposal of an osmotic theory-based model to explain the expansion caused by the alkali attack
(Pergamon-Elsevier Science Ltd, 2020-12)
The expansion mechanism of dolomitic rocks in alkaline environments is complex and a current topic of debate, since two different chemical reactions can coexist: one linked with silica attack (alkali-silica reaction, ASR) ...
Estudo de viabilidade da utilização da escória de aciaria na redução da expansão causada no concreto pela reação álcali-agregado
(Universidade Tecnológica Federal do ParanáPato Branco, 2012-06-22)
The alkali-aggregate reaction (AAR) is a reaction that occurs between alkali cement and some mineral compounds present in certain aggregates, leading to concrete consequences, such as cracking. The alkali-aggregate reaction ...
Análise do cimento álcali ativado quando sujeito à reação álcali-agregado
(Universidade Tecnológica Federal do ParanáPato BrancoBrasilDepartamento Acadêmico de Construção CivilEngenharia CivilUTFPR, 2016-11-22)
The growing environmental concern has stimulated studies for the development of alternative cements, with reduced greenhouse gas emissions in its manufacture. One of these is the alkali activated cement (CAT), which in ...
Effects of different alkaline solutions on the expansivity of rock prisms of an alkali-reactive dolostone from Valcheta (Río Negro, Argentina)
(Pergamon-Elsevier Science Ltd, 2020-08)
A fine-grained argillaceous reactive dolostone was identified in Argentina. In alkaline conditions, a clear dedolomitization reaction occurred, accompanied by a deleterious expansive process. The purpose of this paper is ...
A binder from alkali activation of FCC waste: Use in roof tiles fabrication
(2016-01-01)
Nowadays, scientific community is looking for alternatives to reduce the problem of CO2 emissions, making more sustainable binders and reusing wastes from other industries. In this line, the technology of geopolymers was ...
The reaction of the bis-spirocyclic phosphazene [n3p3(o2c12h8)(2)cl-2](o2c12h8=2,2 -dioxybiphenyl) with thiophenols, in the presence of alkali carbonates
(GORDON AND BREACH SCIENCE PUBLISHERS, 2003)