scholarly journals Long-term field studies of old-growth forests on Changbai Mountain in Northeast China

2011 ◽  
Vol 68 (5) ◽  
pp. 885-887 ◽  
Author(s):  
Guofan Shao
Keyword(s):  
Northeast China ◽  
Field Studies ◽  
Changbai Mountain ◽  
Old Growth ◽  
Old Growth Forests ◽  
Term Field

scholarly journals Changes in carbon density for three old-growth forests on Changbai Mountain, Northeast China: 1981–2010

2011 ◽  
Vol 68 (5) ◽  
pp. 953-958 ◽  
Author(s):  
Li Zhou ◽  
Limin Dai ◽  
Shaoxian Wang ◽  
Xiangtong Huang ◽  
Xinchuang Wang ◽  
...  
Keyword(s):  
Northeast China ◽  
Changbai Mountain ◽  
Carbon Density ◽  
Old Growth ◽  
Old Growth Forests

Radial growth ofPinus koraiensisand carbon sequastration potential of the old growth forest in Changbai Mountain, Northeast China

2016 ◽  
Vol 36 (9) ◽  
Author(s):  
于健 YU Jian ◽  
罗春旺 LUO Chunwang ◽  
徐倩倩 XU Qianqian ◽  
孟盛旺 MENG Shengwang ◽  
李俊清 LI Junqing ◽  
...  
Keyword(s):  
Northeast China ◽  
Radial Growth ◽  
Changbai Mountain ◽  
Old Growth ◽  
Old Growth Forest

scholarly journals A synopsis of long-term field studies of mammals: achievements, future directions, and some advice

2017 ◽  
Vol 98 (3) ◽  
pp. 670-677 ◽  
Author(s):  
Carsten Schradin ◽  
Loren D. Hayes
Keyword(s):  
Field Studies ◽  
Future Directions ◽  
Term Field

Long-Term Field Aging of Warm-Mix and Hot-Mix Asphalt Binders

2017 ◽  
Vol 2632 (1) ◽  
pp. 140-149 ◽  
Author(s):  
Weiguang Zhang ◽  
Shihui Shen ◽  
Shenghua Wu ◽  
Louay N. Mohammad
Keyword(s):  
High Temperature ◽  
Prediction Model ◽  
Hot Mix Asphalt ◽  
Field Studies ◽  
Asphalt Binders ◽  
Climate Effect ◽  
Air Voids ◽  
Multiple Parameters ◽  
Term Field

Limited field studies have considered the aging of warm-mix asphalt (WMA) binders, especially from the perspective of long-term aging. This paper quantifies the long-term (10 to 82 months) field aging properties of WMA binders and the control hot-mix asphalt (HMA) binders and identifies the key factors associated with long-term field aging of asphalt. Asphalt binders from 23 field projects consisting of 65 HMA and WMA pavements were recovered, and high-temperature performance grade (PG) was tested. The effects of climate, month of aging, WMA technologies, and original binder high-temperature PG on field asphalt aging were analyzed. A prediction model that included multiple parameters was developed and validated. Results indicated that Evotherm WMA binder had a lower high-temperature PG than HMA binder shortly after construction, but this difference reduced with time. No statistical difference of field aging between HMA and WMA binders was observed. The climate effect on asphalt field aging was apparent within dry areas or freeze areas, whereas the aging difference between dry and freeze areas was inconclusive and requires further research. Other conclusions were that ( a) the field asphalt aging affects more of top-down longitudinal wheelpath crack than transverse crack, ( b) foaming WMA binder ages slowest of all binders considered, ( c) PG 64-XX and PG 70-XX binders aged more than PG 58-XX and PG 76-XX binders, and ( d) the prediction model had good agreement with test results and was well validated. The identified factors that affected field asphalt aging were overlay thickness, in-place air voids, effective binder content, complex shear modulus, and solar radiation.

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