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Table 4 Thermal conductivity obtained on the starting and doped (+ 5 and + 10% of graphite powder) bentonitic grouts

From: Doped bentonitic grouts for implementing performances of low-enthalpy geothermal systems

  λ (W/m K)
Starting material
 1st measurement 1198
 2nd measurement 1207
 3rd measurement 1171
 4th measurement 1186
Starting material + graphite 5%
 1st measurement 1861
 2nd measurement 1819
 3rd measurement 1940
 4th measurement 1872
 5th measurement 1896
Starting material + graphite 10%
 1st measurement 1917
 2nd measurement 1963
 3rd measurement 2013
 4th measurement 1928
 5th measurement 2045