The design procedure of a dense gap-graded friction course（DGGFC） with coarse aggregate void filling method is presented. Testing results show that a DGGFC mixture possesses a dense stone-matrix structure, good stab...The design procedure of a dense gap-graded friction course（DGGFC） with coarse aggregate void filling method is presented. Testing results show that a DGGFC mixture possesses a dense stone-matrix structure, good stability and almost the same texture depth as stone matrix asphalt （SMA）. It also has a coarse and even surface after paving and has no separation during construction. It is durable and impermeable. It balances and improves the inherent inconsistency of asphalt mixture between the large texture depth for skid resistance and the impermeability for durability. The actual application in the Nanning-Liuzhou Expressway also shows that the performance of the DGGFC is as excellent as that of SMA, while the DGGFC mixture is cheaper than SMA. The DGGFC mixture is good for wearing course of pavement. Further research on DGGFC can be helpful for improving the surface skid resistance, prolonging the life-span period and reducing the construction costs of asphalt pavement.展开更多
MCAM(Monte Carlo Automatic Modeling)是FDS团队自主开发的蒙特卡罗粒子输运计算自动建模软件,其主要功能是实现CAD模型与蒙特卡罗粒子输运计算模型之间的相互转换,但是目前MCAM基于布尔减运算算法生成的蒙特卡罗计算模型的空腔描述往...MCAM(Monte Carlo Automatic Modeling)是FDS团队自主开发的蒙特卡罗粒子输运计算自动建模软件,其主要功能是实现CAD模型与蒙特卡罗粒子输运计算模型之间的相互转换,但是目前MCAM基于布尔减运算算法生成的蒙特卡罗计算模型的空腔描述往往复杂,计算耗时,另外MCAM对于大量管道模型仍需手工填充建模,建模效率低,而且容易出错。为了提高蒙特卡罗计算效率,方便管道空腔建模,提出了一种基于特征识别技术的CAD模型的空腔构造算法,并实现了MCAM空腔构造功能。一方面,降低了CAD模型经过MCAM转换后的空腔描述复杂度;另一方面,可以对管道模型进行自动填充。该功能已经集成至MCAM4.8版本中,测试结果表明了其正确性和可靠性。展开更多
文摘The design procedure of a dense gap-graded friction course（DGGFC） with coarse aggregate void filling method is presented. Testing results show that a DGGFC mixture possesses a dense stone-matrix structure, good stability and almost the same texture depth as stone matrix asphalt （SMA）. It also has a coarse and even surface after paving and has no separation during construction. It is durable and impermeable. It balances and improves the inherent inconsistency of asphalt mixture between the large texture depth for skid resistance and the impermeability for durability. The actual application in the Nanning-Liuzhou Expressway also shows that the performance of the DGGFC is as excellent as that of SMA, while the DGGFC mixture is cheaper than SMA. The DGGFC mixture is good for wearing course of pavement. Further research on DGGFC can be helpful for improving the surface skid resistance, prolonging the life-span period and reducing the construction costs of asphalt pavement.
文摘MCAM(Monte Carlo Automatic Modeling)是FDS团队自主开发的蒙特卡罗粒子输运计算自动建模软件,其主要功能是实现CAD模型与蒙特卡罗粒子输运计算模型之间的相互转换,但是目前MCAM基于布尔减运算算法生成的蒙特卡罗计算模型的空腔描述往往复杂,计算耗时,另外MCAM对于大量管道模型仍需手工填充建模,建模效率低,而且容易出错。为了提高蒙特卡罗计算效率,方便管道空腔建模,提出了一种基于特征识别技术的CAD模型的空腔构造算法,并实现了MCAM空腔构造功能。一方面,降低了CAD模型经过MCAM转换后的空腔描述复杂度;另一方面,可以对管道模型进行自动填充。该功能已经集成至MCAM4.8版本中,测试结果表明了其正确性和可靠性。
