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“Collapsible” lightweight aggregate concrete. Part II: characterization under static and dynamic loadings

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Abstract

In this work a granular cementitious composite has been developed, tailoring its performance to a low compressive strength and high deformation and energy dissipation capacity, which can be required to the material when employed in post-installed screeds for protection of structures and infrastructures against accidental actions such as impact and blast. The required level of performance can be achieved by uniform grain size distribution, paste content as low as minimum theoretical void ratio and low paste strength: it is believed that the synergy between the aforementioned three requirements can allow for energy dissipation capacity after paste cracking due to both rearrangement of grain meso-structure and, in case, grain crushing. After the mix design concept and optimization of the material composition, illustrated in the first part of this companion paper study, the mechanical performance of the composite under static and impact compressive loadings has been thoroughly characterized, as affected by mix-design variables, such as paste volume fraction, water to cement ratio and aggregate size. The reliability will thus be thoroughly checked, of the employed material concept, and the influence will also be investigated, if any, of specimen shape, size and boundary conditions.

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Acknowledgments

The authors acknowledge the financial support of the project ACCIDENT ID 501 7629770, in the frame work of the research programme INTERREG IT/CH 2006-2013; Italy-Israel cooperation was made possible by financial support of Regione Lombardia through project “Advanced Cement Based Materials: concept and structural applications”. The authors are also grateful to prof. Oren Sadot and the staff of the Protective Technologies Research & Development Center, at the Mechanical Engineering Department Ben Gurion University (BGU) for their help with the impact tests.

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Author notes

  1. Alessio Caverzan

    Present address: European Laboratory for Structural Assessment, Institute for the Protection and Security of the Citizen (IPSC), European Commission Joint Research Centre (JRC), Ispra, Italy

Authors and Affiliations

  1. Department of Civil and Environmental Engineering, Politecnico di Milano, Milan, Italy

    Liberato Ferrara & Alessio Caverzan

  2. Energy Engineering Department, Ben Gurion University of the Negev, Beersheba, Israel

    Lior Nahum

  3. Structural Engineering Department, Ben Gurion University of the Negev, Beersheba, Israel

    Alva Peled

Authors
  1. Liberato Ferrara
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  2. Alessio Caverzan
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  3. Lior Nahum
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  4. Alva Peled
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Correspondence to Liberato Ferrara.

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Ferrara, L., Caverzan, A., Nahum, L. et al. “Collapsible” lightweight aggregate concrete. Part II: characterization under static and dynamic loadings. Mater Struct 49, 1747–1760 (2016). https://doi.org/10.1617/s11527-015-0608-4

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  • DOI: https://doi.org/10.1617/s11527-015-0608-4

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