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

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• 作者：Liberato Ferrara ; Alessio Caverzan ; Lior Nahum ; Alva Peled
• 关键词：Collapsible concrete ; Energy dissipation ; Static and dynamic testing ; Blast protection ; Multiscale material concept and performance
• 刊名：Materials and Structures
• 出版年：2016
• 出版时间：May 2016
• 年：2016
• 卷：49
• 期：5
• 页码：1747-1760
• 全文大小：1,962 KB
• 参考文献：1.Deo O, Neithalath N (2011) Compressive response of pervious concretes proportioned for desired properties. Constr Build Mater 25:4181–4189CrossRef
  2.Ferrara L, Caverzan A, Peled A (2015) “Collapsible” lightweight aggregate concrete—part I: material concept and preliminary characterization under static loadings. Mater Struct. doi:10.​1617/​s11527-015-0609-3
  3.Naaman AE, Wille K (2010) Some correlation between high packing density, ultra-high performance, flow-ability and fiber reinforcement of a concrete matrix. In: Barros J et al (eds) BAC 2010, proceedings 2° Congreso Iberico Betão Auto-Compactável—Hormigón AutoCompactante. 1–2 July 2010, Guimarães, Multicomp, pp 3–18
  4.Pekmezci BY, Voigt T, Wang K, Shah SP (2007) Low compaction energy concrete for improved slipform casting of concrete pavements. ACI Mater J 104:251–258
  5.Sumanasooriya MS, Neithalath N (2011) Pore structure features of pervious concretes proportioned for desired properties and their performance prediction. Cem Concr Compos 33:778–787CrossRef
  
• 作者单位：Liberato Ferrara (1)
  Alessio Caverzan (1) (4)
  Lior Nahum (2)
  Alva Peled (3)
  
  1. Department of Civil and Environmental Engineering, Politecnico di Milano, Milan, Italy
  4. European Laboratory for Structural Assessment, Institute for the Protection and Security of the Citizen (IPSC), European Commission Joint Research Centre (JRC), Ispra, Italy
  2. Energy Engineering Department, Ben Gurion University of the Negev, Beersheba, Israel
  3. Structural Engineering Department, Ben Gurion University of the Negev, Beersheba, Israel
  
• 刊物类别：Engineering
• 刊物主题：Structural Mechanics
  Theoretical and Applied Mechanics
  Mechanical Engineering
  Operating Procedures and Materials Treatment
  Civil Engineering
  Building Materials
  
• 出版者：Springer Netherlands
• ISSN：1871-6873

文摘

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.