​

Textile  Reinforced  Mortar  (TRM)  is  an  appealing  choice  for  the  strengthening  of 

existing  structures  and  especially  that  of  monumental  character  through  application  as 

external  reinforcement.  In  the  current  study,  the  TRM-to-masonry  bond  was  experimentally 

investigated focusing on the parameter of the yarns’ treatment, that is none or impregnation 

with Styrene-Butadiene  Rubber  – SBR latex. For this purpose, both double-lap/double-prism 

(DL) and  single-lap/single-prism  (SL)  shear  bond  test  configurations  have  been  employed.

Specimens comprised strips of glass fiber textiles (either uncoated – UT or fully impregnated

– IT)  applied  on  wall  prisms  of  stack-bonded  smooth  clay  units  through  a  cement-based

mortar. TRM strips of DL specimens (with uncoated textile – UT or impregnated textile – IT)

had  a  bond length  (BL)  equal  to  150  mm. This  BL  was  larger  than  the  effective  one,  i.e.  the

minimum  length  needed  for  the  attainment  of  the  maximum  TRM  bond  capacity  (with  UT).

Due  to  the  inadequacy  of  the  DL  set-up  in  capturing  specimens’  post-peak  response,  the  SL

set-up was also opted for. TRM strips of SL specimens (with UT or IT) had various BLs (100

mm, 150 mm and 200 mm) in order to study the combined effect of BL and textile

impregnation.  According  to  the  results  from  both  set-ups,  the  maximum  bond  load,  Fmax  of

specimens with IT was increased by 40% in comparison with specimens with UT.

Additionally, Fmax of specimens with IT increased with increasing BL.

​

== Full document ==

<pdf>Media:Draft_Content_175660329p826.pdf</pdf>

== References ==

​

[1]  Triantafillou,  T.  ed.  Textile  fibre  composites  in  civil  engineering.  Woodhead  Publishing (2016).  

​

[2]  D‟Ambrisi, A., Feo, L. and Focacci, F. Experimental and analytical investigation on bond  between Carbon-FRCM materials and masonry. Composites: Part B 46 (2013), pp. 15–20.  

​

[3]  Askouni, P.D. and Papanicolaou, C.G. Experimental investigation of bond between  glass  textile  reinforced  mortar  overlays  and  masonry:  the  effect  of  bond  length.  Materials  and  Structures 50(2) (2017), pp. 164.   

​

[4]  Donnini, J., Corinaldesi, V. and Nanni, A. Mechanical properties of FRCM using carbon  fabrics with different coating treatments. Composites: Part B, 88 (2016), pp. 220-228.   

​

[5]  Donnini,  J.  and  Corinaldesi,  V.  Mechanical  characterization  of  different  FRCM  systems for  structural  reinforcement.  Construction  and  Building  Materials  145  (2017),  pp.  565-575.  

​

[6]  Leone, M., Aiello, M.A., Balsamo, A., Carozzi, F.G., Ceroni, F., Corradi, M., Gams, M.,  Garbin,  E.,  Gattesco,  N.,  Krajewski,  P.,  Mazzotti,  C.,  Oliveira,  D.,  Papanicolaou,  C.G.,  Ranocchiai,  C.,  Roscini,  F.  and  Saenger,  D.  Glass  fabric  reinforced  cementitious  matrix: Tensile  properties  and  bond  performance  on  masonry  substrate.  Composites  Part  B  127 (2017), pp. 196-214.  

​

[7]  D'Antino,  T.  and  Papanicolaou,  C.  Comparison  between  different  tensile  test  set-ups  for the mechanical characterization of inorganic-based composites. Construction and Building Materials 171 (2018), pp. 140–151.  

​

[8]  De  Andrade  Silva,  F.,  Butler,  M.,  Hempel,  S.,  Toledo  Filho,  R.D.  and  Mechtcherine,  V. Effects  of  elevated  temperatures  on  the  interface  properties  of  carbon  textile-reinforced concrete. Cement and Concrete Composites, 48 (2014), pp.26-34.  

​

[9]  Aljewifi,  H.,  Fiorio,  B.  and  Gallias,  J.L.  Characterization  of  the  impregnation  by  a  cementitious matrix of five glass multi-filament yarns. European journal of environmental  and civil engineering 14(5) (2010), pp.529-544.  

​

[10] Schneider,  K.,  Michel,  A.,  Liebscher,  M.,  Terreri,  L.,  Hempel,  S.  and  Mechtcherine, V.  Mineral-impregnated  carbon  fibre  reinforcement  for  high  temperature  resistance  of thin-walled concrete structures. Cement and Concrete Composites 97 (2019), pp.68-77.  

​

[11] Lorenz, E., Schütze, E. and Weiland, S. Textile Reinforced Concrete-Properties of the Composite Material. BETON-UND STAHLBETONBAU 110 (2015), pp.29-41.  

​

[12] Rempel, S., Kulas, C. and Hegger, J. Bearing behavior of impregnated textile reinforcement. In: Brameshuber, W. (Ed.), 11th International Symposium on Ferrocement (FERRO-11)  and  3rd  International  Conference  on  Textile  Reinforced  Concrete  (ICTRC-3), Aachen, Germany, 7-10 June 2015, pp. 71-77.  

​

[13] RILEM TC 76. (1991). “Technical  recommendations  for  testing  and  use  of constructions materials: LUMB1.” Chapman & Hall, UK.  

​

[14] (CEN)  European  Committee  for  Standardization.  (2005).  “Design  of  masonry  structures, part 1.1.” Eurocode 6, Brussels.  

​

[15] British  Standard.  (1999).  “Textiles-Tensile  properties  of  fabrics,  part  1.”  EN  ISO 13934, UK.  

​

[16] (CEN)  European  Committee  for  Standardization. (1993). “Methods of test for mortar  for masonry, part 11.” EN 1015, Brussels.  

​

[17] Sneed,  L.H., D‟Antino,  T.,  Carloni,  C.  and  Pellegrino,  C.  A  comparison  of  the  bond  behavior of PBO-FRCM composites determined by double-lap and single-lap shear tests.Cement and Concrete Composites 64 (2015), pp. 37-48.  

​

[18] Askouni,  P.D.  and  Papanicolaou,  C.G.  Comparison  of  double-lap/double-prism  and  single-lap/single-prism shear tests for the TRM-to-masonry bond assessment, In: Mechtcherine V., Slowik V., Kabele P. (eds) Strain-Hardening Cement-Based Composites, SHCC 2017, RILEM Bookseries 15, Springer, Dordrecht, (2018) 527-534.

​