普通混凝土用砂的细度模数的物理意义探讨
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摘要
通过对普通混凝土用砂细度模数计算公式的解析,得到砂细度模数计算公式的实质含义,砂的细度模数计算公式的实质除掉粒径大于4.75 mm的砂,剩下砂的各筛上的累积百分率之和.通过砂的质量平均粒径和算术平均粒径的计算公式的推导,与砂的细度模数计算公式进行对比,砂的细度模数可以认为反映了砂的筛上质量平均粒径,计算中忽略了粒径小于0.15 mm部分砂子对质量平均粒径的贡献,砂中颗粒较大粒径砂的质量对砂的细度模数和质量平均粒径值影响较大,砂中细颗粒对砂的算术平均粒径值影响较大.
Through the analysis of ordinary concrete with fineness modulus of sand formula,the real meaning of fineness modulus of sand calculation formula was given,which was the sum of the rest of the cumulative percentage on each sieve to get rid of diameter greater than 4.75 mm sand. The calculation formula of the quality average particle size of sand and the arithmetic average particle size of sand were derived,compared with the calculation formula of fineness modulus of sand. The fineness modulus of sand could be considered the quality average particle size of sand sieve residue but ignoring the small particle size in the 0. 15 mm part of sand contribution to the quality average size.The quality of sand in larger particles gave more influence on the fineness modulus of sand and the quality average particle size,and the arithmetic average particle size of sand was effected by fine sand quality in more consideration.
Through the analysis of ordinary concrete with fineness modulus of sand formula,the real meaning of fineness modulus of sand calculation formula was given,which was the sum of the rest of the cumulative percentage on each sieve to get rid of diameter greater than 4.75 mm sand. The calculation formula of the quality average particle size of sand and the arithmetic average particle size of sand were derived,compared with the calculation formula of fineness modulus of sand. The fineness modulus of sand could be considered the quality average particle size of sand sieve residue but ignoring the small particle size in the 0. 15 mm part of sand contribution to the quality average size.The quality of sand in larger particles gave more influence on the fineness modulus of sand and the quality average particle size,and the arithmetic average particle size of sand was effected by fine sand quality in more consideration.
引文
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[8]Daityari S,Khan M Y A.Temporal and spatial variations in the engineering properties of the sediments in Ramganga River,Ganga Basin,India[J]. Arabian Journal of Geosciences,2017,10(6):134-146.
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[11]Park S. Study on the fluidity and strength properties of high performance concrete utilizing crushed sand[J]. International Journal of Concrete Structures and Materials,2012,6(4):231-237.
[2]Kumar M P,Monteiro P J M.混凝土:微观结构性能和材料[M].北京:中国电力出版社,2008.
[3]许尚杰,尹小涛,马双科,等.基于颗粒流的混凝土材料数值试验研究[J].实验力学,2009,24(3):251-258.
[4]杜敏,金浏,李冬,等.模型尺寸和骨料级配对混凝土细观非均质影响[J].应用基础与工程科学学报,2017,25(2):382-394.
[5]Li D,Jin L,Du X L,et al. Size effect tests of normal-and high-strength reinforced concrete columns subjected to axial compressive loading[J].Engineering Structure,2016,109:43-60.
[6]Popovics S. The use of the fineness modulus for the grading evaluation of aggregates for concrete[J]. Magazine. Concrete.Research,1966,18(56):131-140.
[7]Ahmed M,Islam S,Nazar S,et al. A Comparative Study of Popular Concrete Mix Design Methods from Qualitative and CostEffective Point of View for Extreme Environment[J].Arabian Journal for Science and Engineering,2016,41(4):1403-1412.
[8]Daityari S,Khan M Y A.Temporal and spatial variations in the engineering properties of the sediments in Ramganga River,Ganga Basin,India[J]. Arabian Journal of Geosciences,2017,10(6):134-146.
[9]Mindess S,Young J F,Darwin D.混凝土(第二版)[M].吴科如,张雄,姚武,等译,北京:化学工业出版社,2005.
[10]Neville A M.混凝土的性能[M].刘数华,冷发光,李新宇,等译,北京:中国建筑工业出版社,2011:112-113.
[11]Park S. Study on the fluidity and strength properties of high performance concrete utilizing crushed sand[J]. International Journal of Concrete Structures and Materials,2012,6(4):231-237.