@article{fdi:010057185,
  title = {{S}trength evolution of a reactive frictional interface is controlled by the dynamics of contacts and chemical effects},
  author = {{R}enard, {F}. and {B}eaupr{\^e}tre, {S}. and {V}oisin, {C}hristophe and {Z}igone, {D}. and {C}andela, {T}. and {D}ysthe, {D}. {K}. and {G}ratier, {J}. {P}.},
  editor = {},
  language = {{ENG}},
  abstract = {{A}ssessing the healing rate of a fault is relevant to the knowledge of the seismic machinery. {H}owever, measuring fault healing at the depths where it occurs still remains inaccessible. {W}e have designed an analog laboratory experiment of a simulated rough fault that undergoes healing and investigate the relative roles of interface chemical reactivity and sliding velocity on the healing rate. {S}lide-hold-slide experiments are conducted on a bare interface with various materials in contact (glass/glass, salt/glass, and salt/salt) with or without the presence of a reactive fluid and the slider-surface pull-off force is measured. {O}ur results show that the interface strengthens with hold time, whatever the conditions of the experiments. {I}n addition, we quantify the effect of chemical reactivity on the healing rate. {C}onsidering the glass/glass case as a reference, we show that the healing rate is increased by a factor of 2 for the salt/glass case; by a factor of 3 for the salt/salt case; and by about a factor of 20 when saturated brine is added on a salt/salt interface. {W}e also measure that the sliding velocity affects the healing rate for salt/salt interfaces at room humidity. {A} careful optical monitoring of the interface allows a direct observation of the contact growth characteristics associated to each type of materials. {F}inally, the large differences of healing rate are interpreted through a mechanistic approach, where the various experimental conditions allow separating different healing mechanisms: increase of adhesion of the contacts by welding, contact growth due to creep or due to neck growth driven by surface tension.},
  keywords = {fault ; friction ; healing},
  booktitle = {},
  journal = {{E}arth and {P}lanetary {S}cience {L}etters},
  volume = {341},
  numero = {},
  pages = {20--34},
  ISSN = {0012-821{X}},
  year = {2012},
  DOI = {10.1016/j.epsl.2012.04.048},
  URL = {https://www.documentation.ird.fr/hor/fdi:010057185},
}