Swiss Federal Institute of Technology L..JU.L.._...,,LJ., Specific fracture energy and strain softening have parameters, which describe cracking of ...,~,, .. JL._, .. ~,,HV realistic way. But depend on ~..,.~..,A .. ,.,.~AA as strength does. In order to investigate fracture mechanics…
Swiss Federal Institute of Technology L..JU.L.._...,,LJ., Specific fracture energy and strain softening have parameters, which describe cracking of ...,~,, .. JL._, .. ~,,HV realistic way. But depend on ~..,.~..,A .. ,.,.~AA as strength does. In order to investigate fracture mechanics parameters wedge splitting tests out on geometrically similar specimens specimen dimension ranging between prepared with hardened cement paste, mortar, AA~AAAA·~A concrete have been tested. The influence the ......... ~.,u ..... LA~,, ..... dependence the....,...,.,.,,..,.,~._....,,"""' increases size concrete decreases instead. increasing aggregate size. words: investigation, ~ ...... ,..,~.~ .. influence aggregate size, .u ........ ~ ... ., ..... _ .. ,.., mechanics parameters are specimens compared to size of a mechanics tests it is known, that these parameters depend on IJ'-'''""·u ...... ...,A. size and geometry. This has been observed before by V.l.Ul..l.U!Jl.'"' Briihwiler (1989), (1990), in most models of mechanics it is assumed constants and independent of size m grained mortars (FM I, FM normal concrete (NC) and DC been Table 1.