000			01809aab a2200193 4500
008			230921b2023 |||br|p| |||| 00| 0 eng d
022			_a0889-325x
100			_aHossein Karimi and H. J. H. Brouwers _9878270
245			_aA Particle Packing Method for Pumpable Low-Shrinkage Flowing Concrete
300			_a81-92p.
520			_aIn this paper, the applicability of the modified Andreasen and Andersen (A&A) particle packing model for designing pumpable flowing concretes, according to ACI 211.9R-18, is analyzed. An experimental investigation is undertaken to evaluate consistency, compressive strength, and shrinkage of flowing concretes designed with this model. The results show that the modified A&A model optimizes the particle size distribution of concrete ingredients and produces pumpable concretes according to ACI 211.9R-18. The distribution modulus of the model controls the combined grading, the ratio of coarse-to-fine aggregate, and the percentage of fine aggregate passing 300 and 150 μm. At a distribution modulus of 0.35, the model serves as the ACI’s recommended boundary limit for ideal-for-pumping combined grading. A high distribution modulus results in a high coarse-to-fine aggregate ratio and lowers the drying shrinkage of concrete. This insight enables a straightforward mixture design methodology that results in concrete that meets ACI 211.9R-18 recommendations.
650			_aFlowing Concrete _9698177
650			_aMix Design _9729549
650			_aModified A&A Model _9878271
650			_aParticle Size Distribution _9700077
773	0		_x0889325X _dDetroit, U.S.A : American Concrete Institute _tACI Materials Journal
856			_uhttps://www.concrete.org/publications/internationalconcreteabstractsportal.aspx?m=details&id=51738685
942			_2ddc _n0 _cART _o188 _pNAZIA Sami
999			_c814167 _d814167