"Collapsible" lightweight aggregate concrete. Part I: material concept and preliminary characterization under static loadings

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• 作者：Liberato Ferrara ; Alessio Caverzan ; Alva Peled
• 关键词：Collapsible concrete ; Multiscale mix optimization ; Energy dissipation ; Blast protection
• 刊名：Materials and Structures
• 出版年：2016
• 出版时间：May 2016
• 年：2016
• 卷：49
• 期：5
• 页码：1733-1745
• 全文大小：1,677 KB
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  4.Deo O, Neithalath N (2011) Compressive response of pervious concretes proportioned for desired properties. Constr Build Mater 25:4181–4189CrossRef
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  6.Ferrara L, Park YD, Shah SP (2007) A method for mix-design of fiber reinforced self compacting concrete. Cem Concr Res 37:957–971CrossRef
  7.Ferrara L, Caverzan A, Nahum L, Peled A (2015) “Collapsible” lightweight aggregate concrete. Part II: characterization under static and dynamic loadings. Mater Struct. doi:10.​1617/​s11527-015-0608-4
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  12.Nian W, Subramaniam KVL, Andreopoulos Y (2015) Experimental investigation of blast-pressure attenuation by cellular concrete. ACI Mater J 112:21–28
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  17.Sumanasooriya MS, Neithalath N (2011) Pore structure features of pervious concretes proportioned for desired properties and their performance prediction. Cement Concrete Compos 33:778–787CrossRef
  18.Sumanasooriya MS, Deo O, Neithalath N (2012) Particle packing-based material design methodology for pervious concretes. ACI Mater J 109:205–214
  
• 作者单位：Liberato Ferrara (1)
  Alessio Caverzan (1) (3)
  Alva Peled (2)
  
  1. Department of Civil and Environmental Engineering, Politecnico di Milano, Milan, Italy
  3. European Laboratory for Structural Assessment, Institute for the Protection and Security of the Citizen (IPSC), European Commission Joint Research Centre (JRC), Ispra, Italy
  2. Structural Engineering Department, Ben Gurion University of the Negev, Beersheva, 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 low compressive strength as well as to high deformation and energy dissipation capacity. This peculiar performance 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 through 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. This part I of a companion paper study first of all details the optimization of the material composition, in terms of mix-design variables such as w/c ratio, content of air entraining agent, mixing protocol, paste volume fraction, grain size distribution of the employed lightweight expanded clay aggregate. The mechanical performance of a trial collapsible concrete mix will be then checked. In part II extensive mechanical characterization under static and impact loadings will be performed as pertinent to the intended aforementioned application.