Using beam and ENDB specimens to evaluate fracture characteristics of wavy steel fiber‐reinforced self‐compacting concrete containing different coarse aggregate volumes

Abstract

This research has addressed the effects of coarse aggregate (CA) and wavy steel fiber (WSF) volumes on the self‐compacting concrete (SCC) fracture parameters in beam and edge notched disk bend (ENDB) specimens using size effect and work fracture methods (SEM and WFM). Mix designs were based on 30%–60% CA volumes and 0.15%–0.45% WSF volumes, and 144 different‐size notched beam specimens underwent 3‐point bending tests. Results showed that increasing the CA volume and percent WSFs increased the SCC ductility in both SEM and WFM; increasing the WSF volume affected the fracture energy‐compressive strength relationship negatively at 30% and 40% CA volumes, and increasing the WSF affected the mentioned relationship positively at 50 and 60% CA volumes. Finally, we predicted the relationship between the fracture parameters calculated with ENDB specimens and those of beam specimens calculated with SEM and WFM.

Comparative cracking resistance‐cost study for the hot mix asphalt (HMA) mixtures made of natural and recycled asphaltic materials

“…These two indexes can be determined experimentally using suitable laboratory samples. Review of available works reveals that some test specimens including SCB, [87][88][89][90][91][92][93][94][95][96][97] short and long cracked beams subjected to three-or four-point bending, 57,[98][99][100][101][102][103] center cracked Brazilian disk under diametric compression, 104,105 and the ENDB 52,64,[106][107][108][109][110][111][112][113][114][115][116] are among the common used test samples for investigating mixed modes I and II fracture in asphaltic materials. Among them, the ENDB specimen is the newest developed sample and has some advantages such as ease of manufacturing and testing.…”

Mixed mode I/II and I/III fracture toughness investigation for preplaced aggregate concrete mixtures: Experimental study and theoretical prediction

“…Hosseini et al investigated the fracture behavior of self-compacting concrete in different studies. [33][34][35] Aliha et al 36 and Rooholamini et al 37 looked at how adding synthetic Forta fibers affected the mode I and mixed mode I/III fracture resistance of plain concrete. Various researchers, including Seitl, 38 Tang, 39 and Scorza, 40 investigated the influence of adding waste materials on fracture toughness.…”

3D numerical analysis of stability and onset of hydraulic fracture in the vertical‐oblique‐horizontal wells under wide range of in situ stresses

“…On the other hand, some researchers have focused on the experimental determination of fracture toughness value for rocks or geo-materials under different loading modes, different temperatures and different confining pressures. [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28] Due to the cylindrical shape of rock cores, disc and circular type specimens are among the common and frequently used test configurations for conducting the rock fracture toughness experiments. Center cracked Brazilian disc, 15,26 edge cracked semi-circular bend, [25][26][27][28] edge notched disc subjected to three-point bending, 19,20,23 single or double edge notched diametral compressed disc 14,24,29 punch through shear, 30,31 short rod tension, 15,16 and edge cracked cylinder loaded with threepoint bending 15,16 are examples of testing configurations and methods for determining the fracture toughness of rock and geo-materials.…”

“…[11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28] Due to the cylindrical shape of rock cores, disc and circular type specimens are among the common and frequently used test configurations for conducting the rock fracture toughness experiments. Center cracked Brazilian disc, 15,26 edge cracked semi-circular bend, [25][26][27][28] edge notched disc subjected to three-point bending, 19,20,23 single or double edge notched diametral compressed disc 14,24,29 punch through shear, 30,31 short rod tension, 15,16 and edge cracked cylinder loaded with threepoint bending 15,16 are examples of testing configurations and methods for determining the fracture toughness of rock and geo-materials.…”

“…In this regard, a number of researchers have simulated the hydraulic fracturing process for wellbores containing artificial crack or perforation to determine the crack tip stress intensity factors 7–10 and to relate these factors to the pumping pressure and magnitude and direction of the applied in situ stresses. On the other hand, some researchers have focused on the experimental determination of fracture toughness value for rocks or geo‐materials under different loading modes, different temperatures and different confining pressures 11–28 . Due to the cylindrical shape of rock cores, disc and circular type specimens are among the common and frequently used test configurations for conducting the rock fracture toughness experiments.…”