为探索贝雷法在半刚性基层中的应用,补充骨架密实型配合比中Coarse Aggregate Ration(CA)值的范围,设计了两种均为"S"型的骨架密实型配合比。通过室内试验,对比静压成型时的稳压力以模拟施工现场的碾压难易程度,总结CA、Coars...为探索贝雷法在半刚性基层中的应用,补充骨架密实型配合比中Coarse Aggregate Ration(CA)值的范围,设计了两种均为"S"型的骨架密实型配合比。通过室内试验,对比静压成型时的稳压力以模拟施工现场的碾压难易程度,总结CA、Coarse Portion of Fine Aggregate(FAC)、Fine Portion of Fine Aggregate(FAf)值对强度的影响。结果表明:在一定范围内,随着CA值的增加稳压力增加且无侧限抗压强度也增加,但强度的增加幅度较小;FAf值的变化对劈裂强度的影响较小;实际工程的应用表明,CA值可大于传统值(0.85),但不宜大于1.0。展开更多
Under the condition of steady state, the pressure drop of coolant is mainly caused by friction along the cable. In the CICC (cable-in-conduit-conductor), helium flow within the conductor consists of two parallel inter...Under the condition of steady state, the pressure drop of coolant is mainly caused by friction along the cable. In the CICC (cable-in-conduit-conductor), helium flow within the conductor consists of two parallel interconnected tubes. The velocity distribution has some differece between the central channel and conductor space. The region of Reynolds number is from 103 to 106. This paper describes the calculation of pressure drop of HT-7U CICC at various mass flows. It is assumed that the coolant flows in two parallel, rough tubes during the calculation.展开更多
文摘为探索贝雷法在半刚性基层中的应用,补充骨架密实型配合比中Coarse Aggregate Ration(CA)值的范围,设计了两种均为"S"型的骨架密实型配合比。通过室内试验,对比静压成型时的稳压力以模拟施工现场的碾压难易程度,总结CA、Coarse Portion of Fine Aggregate(FAC)、Fine Portion of Fine Aggregate(FAf)值对强度的影响。结果表明:在一定范围内,随着CA值的增加稳压力增加且无侧限抗压强度也增加,但强度的增加幅度较小;FAf值的变化对劈裂强度的影响较小;实际工程的应用表明,CA值可大于传统值(0.85),但不宜大于1.0。
基金This work was supported by the National Meg-science Engineering Project of the Chinese Government.
文摘Under the condition of steady state, the pressure drop of coolant is mainly caused by friction along the cable. In the CICC (cable-in-conduit-conductor), helium flow within the conductor consists of two parallel interconnected tubes. The velocity distribution has some differece between the central channel and conductor space. The region of Reynolds number is from 103 to 106. This paper describes the calculation of pressure drop of HT-7U CICC at various mass flows. It is assumed that the coolant flows in two parallel, rough tubes during the calculation.
