Modelling of Effect of ASR on Concrete Microstructure

Abstract:

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In the present study the damage mechanism of Alkali-Silica-Reaction (ASR) in concrete bearing reactive volcanic rock is investigated. A combined numerical and experimental research is presented. The mechanism of ASR is investigated on a concrete microbar specimen by using various microscopy techniques. A meso mechanical model based on lattice theories is used as a starting point. Variables in the model are the properties of the concrete components on the meso-level, like mechanical properties of cement paste, aggregates, dissolved aggregate, bond properties and finally the properties of the gel. It is found that current numerical model is able to simulate ASR cracks similar to the experimental observations.

Info:

Periodical:

Key Engineering Materials (Volumes 348-349)

Edited by:

J. Alfaiate, M.H. Aliabadi, M. Guagliano and L. Susmel

Pages:

809-812

Citation:

O. Çopuroğlu and E. Schlangen, "Modelling of Effect of ASR on Concrete Microstructure ", Key Engineering Materials, Vols. 348-349, pp. 809-812, 2007

Online since:

September 2007

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$38.00

[1] O. Andic-Cakir, O. Copuroglu, E. Schlangen and E. Garcia-Diaz: Combined experimental and modelling study on the expansions of concrete microbars due to ASR, Proceedings CONSEC07, June 4-6 (2007), Tours, France.

[2] O. Copuroglu, O. Andic-Cakir, M.A.T.M. Broekmans and R. Kühnel, Mineralogy, Geochemistry and expansion testing of an alkali-reactive basaltoid from western Anatolia, Turkey., 11th Euroseminar on Microscopy Applied to Building Materials, 5-9 June (2007).

DOI: https://doi.org/10.1016/j.matchar.2008.09.011

[3] I. Comby-Peyrot, Development and validation of a 3D computational tool to describe damage and fracture due to alkali silica reaction in concrete structures. PhD-thesis, Ecole des Mines de Paris, France, (2006).

[4] E. Schlangen and E.J. Garboczi: Fracture simulations of concrete using lattice models: computational aspects, Eng. Fracture Mech., Vol. 57(2/3), (1997), pp.319-332.

DOI: https://doi.org/10.1016/s0013-7944(97)00010-6

[5] E. Schlangen and O. Copuroglu: Concrete damage due to ASR: a new method to determine the properties of the expansive gel, Proceedings Framcos6, June 17-22 (2007), Catania, Italy.

[6] Grattan-Bellew, P.E., Cybanski, G., Fournier, B., Mitchell, L., Proposed Universal Accelerated Test for Alkali-Aggregate Reaction the Concrete Microbar Test. Cement, Concrete and Aggregates, (2003). 25(2): pp.29-34.

DOI: https://doi.org/10.1520/cca10445j

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