Brittleness index of cementitious composites

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Scopus citations

Abstract

Series of direct tension tests were conducted to observe the softening response of different types of cementitious composites, namely, mortar, plain concrete, high strength concrete, normal fibrous concrete, and high strength fibrous concrete. The types of fibers used are straight and hooked end steel fibers with volume fraction of 0.5, 1.0, 1.5, and 2.0%. The strength of the matrix varied from 24 MPa to 83 MPa. Two types of direct tension specimen, a dog bone and an end-tapered specimen, were developed for monitoring the post-peak response of brittle composites like concrete. All tests were done in an MTS testing machine under closed-loop strain control. The complete load-displacement curve, both ascending and descending branches, of each test was closely monitored and recorded. A simple generalized stress-displacement relationship is proposed. A single variable named 'brittleness index' is introduced and use to model the softening response of different types of cementitious composites. The predicted responses agree closely with the experimental results.

Original languageEnglish (US)
Title of host publicationServ Durability Constr Mater Proc First Mater Eng Congr
PublisherPubl by ASCE
Pages966-975
Number of pages10
ISBN (Print)0872627772
StatePublished - Jan 1 1990
EventServiceability and Durability of Construction Materials - Proceedings of the First Materials Engineering Congress Part 1 (of 2) - Denver, CO, USA
Duration: Aug 13 1990Aug 15 1990

Publication series

NameServ Durability Constr Mater Proc First Mater Eng Congr

Other

OtherServiceability and Durability of Construction Materials - Proceedings of the First Materials Engineering Congress Part 1 (of 2)
CityDenver, CO, USA
Period8/13/908/15/90

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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