Heavy concrete currently used for construction contains special materials that are expensive and difficult to work with.This study replaced natural aggregate(stones) in concrete with round steel balls,which are inexpensive and easily obtainable.The diameters of the steel balls were 0.5 and 1 cm,and their density was 7.8 kg/m3.Dense packing mixture methods were used to produce heavy concrete with densities of 3500 and 5000 kg/m3.The various properties of this concrete were tested according to the standards of the American Society for Testing and Materials(ASTM).The results indicated that the construction slump of the concrete could reach 260-280 mm and its slump flow could reach 610-710 mm.More important,its compressive strength could reach 8848 MPa.These results will significantly alter traditional construction methods that use heavy concrete and enhance innovative ideas for structural design.
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机译:The Rise of the Chinese Concerto: A Look into the Developments of Chinese Traditional Instrument Concerti with Western Orchestra =中国协奏曲文化的兴起:对于中国传统乐器与西洋交响乐团合作的协奏曲的研究
机译:Contexto e desenvolvimento cognitivo:freqüênciaàcrecheeevoluçãododesenvolvimento mental Context and cognitive development:at carecare to day care center and mental development of mental development