concrete number
1.This paper makes analysis mainly on the economical comparisons between the use of various cement with strength number 325, 425, 525 for the marine structure concrete with strength number 20, 25, 30, 40, 50 and according to the service conditions it is suggested that the designated strength number of cement should be used for corresponding marine structure concete. In the use of concrete pump, the adaptable numbers of cement are also given for the numbers of 25 and 30 concrete.
5.In this article, high performance concrete applied to some thin wall pilla structure was worked out successfully in the west of china with big temperature gap by a large number of experiments, in order to improve cracking resistence and optimize mix of concrete, which will be helpful in improving concrete construction.
6.A: Concrete measures include the following: First, breakthroughs will be made in the textile industry to accomplish the three-year targets of reducing productive capacity and increasing added value, readjusting industrial structure, transforming operational mechanisms, and enhancing efficiency through cutting the number of employees.
7.In addition, moreover the Pre-stressed strands which are anchoraged in the box girder webs produce great influence on the anchorage concrete zone,and the variant longitudinal Pre-stressed strand arrangements produce great influence of the inner inforce of the box girder upper plate,so it is paid attention to in design through collocating a number of common reinforcing steel bar.
9.In order to confirm the organization of train operation in planning regional intercity express railway, relative problems are studied, including velocity target value selection, the establishment of reasonable interval, and the concrete matters of passenger train plan, such as its influence factors and principles, operational organization modes, the choices of passenger train, the principles of the marshalling quantities on a group of intercity EMU and DMU and the number ofintercity trains in a line per day.
10.puts forward the concrete measures of establishing the mechanism of traffic safety management ,that is based on separating the functions of government from those of the enterprise and establishing long-term & effective mechanism with operating units the main body to conform and optimize the allocation of resources . to improve the traffic safety economic benefit ,reduce administrative cost ,improve the efficiency of traffic safety management ,bring down the number of traffic accidents and to realize the purpose of traffic convenience and high efficiency.
