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Pipe Table 1: Thermal Conductivities of Typical Grouts and Backfills (1-4)
管道属性表1:典型灌浆和回填的导热系数(1-4)
 
k ()
Grouts without Additives
无添加剂的灌浆
 
20% Bentonite 膨润土
0.42
30% Bentonite 膨润土
0.43
Cement Mortar 水泥砂浆
0.40-0.45
Concrete 混凝土 @ 130/150 
0.60/0.80
Concrete 混凝土 (50% Quartz Sand 石英砂)
1.1-1.7
 
Thermally Enhanced Grouts
热增强灌浆
 
20% Bentonite 膨润土--40% Quartzite 石英砂
0.85
30% Bentonite 膨润土--30% Quartzite 石英砂
0.70-0.75
30% Bentonite 膨润土--30% Iron Ore 铁矿石
0.45
60% Quartzite 石英砂--Flowable Fill 流动性填充
(Cement 水泥 + Fly Ash 粉煤灰 + Sand 沙)
1.07

1. CRC Handbook of Tables for Applied Engineering Science, Chemical Rubber Co., Cleveland, 1970.
2. C. P. Remund, "The Effect of Grout Thermal Conductivity on Vertical Geothermal Heat Exchanger Design and Performance," South Dakota State University, 1996.
3. "Thermal and Water Vapor Transmission Data," 1993 ASHRAE Handbook-Fundamentals, p.22.8. Atlanta: American Society of Heating, Refrigerating, and Air-Conditioning Engineers, Inc., 1993.
4. M. L. Allan, "Improvement of Cementitious Grout Thermal Conductivity for GHP Applications," Preliminary Report, Brookhaven National Laboratory.

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