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Oleksandr Kovalchuk,Oleksandr Gelevera,Vasyl Ivanychko
Pág. 33 - 40
This paper reports results from comparative testing the reaction "alkali ? active silica" in traditional Portland cement and alkaline Portland cement with the addition of metakaolin. The research is based on studying the process of structure formation in...
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Seyedsaleh Mousavinezhad, Judit M. Garcia, William K. Toledo and Craig M. Newtson
For several decades, class F fly ash has been an attractive supplementary cementitious material, at least in part, due to its ability to reduce Portland cement consumption and mitigate alkali-silica reactions in concrete. However, fly ash availability is...
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Md Asif Rahman and Yang Lu
The assessment of concrete infrastructures? functionality during natural hazards is fundamental in evaluating their performance and emergency response. In this work, the alkali?silica reaction (ASR) in concrete is evaluated under the climate change impac...
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Jiawei Lei, Jiajun Fu and En-Hua Yang
Low-calcium fly ash-based geopolymer concrete is generally reported to be less vulnerable to alkali-silica reaction (ASR) than conventional ordinary Portland cement concrete. However, the lack of understanding of pore solution composition of the low-calc...
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Martina Colombo and Claudia Comi
The alkali?silica reaction is a chemical phenomenon that, by inducing expansion and the formation of cracks in concrete, can have a severe impact on the safety and functioning of existing concrete dams. Starting from a phenomenological two-phase isotropi...
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Miguel Ángel Sanjuán, Esteban Estévez and Cristina Argiz
The testing procedure provided in this paper aims to estimate the available alkali content in cement-based materials, and it has a direct application in the construction materials field. Particularly, it should be used when the potential alkali?silica re...
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Vyacheslav Troyan,Nadiia Sova
Pág. 13 - 19
The paper reports results of examining the influence of modifier admixtures on the corrosion resistance of concrete for reinforced concrete sleepers based on the criteria of electric resistance, resistance to alkaline corrosion and corrosion due to the c...
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Miguel Barreto Santos, Jorge de Brito, António Santos Silva
Pág. Page 141 - 152
Alkali-silica reactions (ASR) are one of the causes of chemical degradation of concrete with natural aggregates (CNA) that compromise its durability. The introduction of recycled aggregates (RA) in concrete creates changes in their properties and differe...
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Esperanza Menéndez, Miguel Ángel Sanjuán, Ricardo García-Roves, Cristina Argiz and Hairon Recino
In this paper, the idea of the sustainability of durable solutions is very much present. The effect of four pozzolanic materials employed in four percentages in mortars made with two different reactive aggregates is assessed regarding alkali-silica react...
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Awetehagn Tuaum, Stanley Shitote and Walter Oyawa
This experimental research is focused on the development of self-compacting mortar incorporating recycled glass aggregate (SCM-RGA) as partial substitution of fine aggregate (wt 0%, 10%, 20%, 30%, 40% and 50%). The fresh and hardened mechanical propertie...
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Yusuf Göksen, Ugur Durak, Serhan Ilkentapar, Ismail Isa Atabey, Mehmet Kaya, Okan Karahan, ?Cengiz Duran Atis?
Pág. 419 - 430
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Jorge Luís Akasaki, Camila Sancowich Zoilo, Cesar Fabiano Fioriti, Adriana María Pereira, Haroldo de Mayo Bernardes, Flavio Moreira Salles
Pág. Page 290 - 299
The concrete structures of Jaguari Hydro Power Plant (HPP) display cracks due to the occurrence of Alkali-Silica Reaction (ASR). The qualitative analysis of the cracks that occurin the slab of the water intake structure was performed through in-loco visu...
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Guanzheng Zhou and Ray Kai Leung Su
Foam concrete is a promising material in building and construction applications, providing such outstanding properties as high specific strength, excellent thermal insulation, and effective acoustic absorption in human-inhabited buildings. However, becau...
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Andres Salas Montoya, Loth I. Rodríguez-Barboza, Fabiola Colmenero Fonseca, Javier Cárcel-Carrasco and Lauren Y. Gómez-Zamorano
In recent decades, alkali activated and blended cements have attracted great interest worldwide due to their advantages of low energy cost, high strength, and good durability. This study evaluated the effects of replacing 50% of Portland cement with a mi...
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Yang Li, Jiaqi Chai, Ruijun Wang, Yu Zhou and Xiaogen Tong
As the number of discarded tyres continues to increase, causing serious environmental problems, the need of recycling the waste tyre rubber become extremely urgent in worldwide. Today, there is an increasing focus on recyclable materials. The reuse of wa...
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