Determination of thermal diffusivity and conductivity on ballast / Binxiang Sun, Xiaozo Xu, Yuanming Lai, Dongqing Li.

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245 00 ‡aDetermination of thermal diffusivity and conductivity on ballast /‡cBinxiang Sun, Xiaozo Xu, Yuanming Lai, Dongqing Li.
260 ## ‡a[S.l.] :‡b[s.n.],‡c2002.
300 ## ‡ap. 790-795 :‡bdiags., tables.
500 ## ‡aJournal of Glaciology and Geocryology. Vol. 24(6) :790-795 (2002).
500 ## ‡aEnglish summary and captions.
520 3# ‡aDescribes technique for determining thermal diffusivity and conductivity of ballast used in roadbed construction in cold regions. Uses 15 cm internal diameter plexiglass cylinder containing compacted ballast, with top plate to which cyclic temperature fluctuations are applied. Presents results using 12 hour cycle with specimens of embankment and revetment ballast of three particle size ranges. Using a grain size of 6 to 8 cm and temperature amplitudes ranging from 11.4 °C to 20.0 °C about means ranging from 0.0 °C to -0.5 °C, obtains values of diffusivity and conductivity via regression. Comparison with results for other grain sizes indicates both properties decrease with decreasing grain size.
546 ## ‡aIn Chinese.
650 07 ‡a624.139 -- Engineering in frozen ground.‡2udc
650 07 ‡a624.136 -- Embankments.‡2udc
650 07 ‡a625 -- Railway and highway engineering.‡2udc
650 07 ‡a551.34 -- Geocryology. Frozen ground.‡2udc
650 07 ‡a536.2.01 -- Heat, conduction.‡2udc
650 07 ‡a551.341 -- Permafrost and frozen ground, equipment for investigating.‡2udc
650 07 ‡aE12 -- Glaciology: frozen ground / snow and ice engineering.‡2local
700 1# ‡aSun, Binxiang.
700 1# ‡aXu, Xiaozo.
700 1# ‡aLai, Yuanming.
700 1# ‡aLi, Dongqing.
773 0# ‡7nnas ‡tJournal of Glaciology and Geocryology. ‡gVol. 24(6) (2002) ‡wSPRI-72888
917 ## ‡aUnenhanced record from Muscat, imported 2019
948 3# ‡a20240419