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

Liberato Ferrara, Alessio Caverzan, Lior Nahum, Alva Peled

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

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.

Original languageEnglish
Pages (from-to)1747-1760
Number of pages14
JournalMaterials and Structures/Materiaux et Constructions
Volume49
Issue number5
DOIs
StatePublished - 1 May 2016

Keywords

  • Blast protection
  • Collapsible concrete
  • Energy dissipation
  • Multiscale material concept and performance
  • Static and dynamic testing

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