The close aggregate packing method is a new type of mix design used to design for selfcompacting ... more The close aggregate packing method is a new type of mix design used to design for selfcompacting concrete. To improve the particle packing density of concrete, the particles should be selected to fill up the voids between large particles with smaller particles and obtain a dense and stiff particle structure. A higher degree of particle packing leads to minimum voids, maximum density, and cement and water requirement will be less. The optimum bulk density was obtained at a proportion of 42% coarse aggregates (20mm downsize), 18% coarse aggregates (12.5mm downsize), and 40% fine aggregates. The peak value of the compressive strength of cubes is 81 MPa, while that of the cylinders' split tensile strength is 2.82 MPa. The mix ratio of 1:0.80:1.20:0.25:0.013 (cement: fine aggregate: coarse aggregate: water ratio: supper plasticizer dosage) should be used for the consistent production of a Grade 80 MPa selfcompacting concrete as it will meet the European Standard for Self-Compacting Concrete acceptability criteria for a self-compacting concrete and also give 28 days compressive strength of 81 MPa.
The close aggregate packing method is a new type of mix design used to design for selfcompacting ... more The close aggregate packing method is a new type of mix design used to design for selfcompacting concrete. To improve the particle packing density of concrete, the particles should be selected to fill up the voids between large particles with smaller particles and obtain a dense and stiff particle structure. A higher degree of particle packing leads to minimum voids, maximum density, and cement and water requirement will be less. The optimum bulk density was obtained at a proportion of 42% coarse aggregates (20mm downsize), 18% coarse aggregates (12.5mm downsize), and 40% fine aggregates. The peak value of the compressive strength of cubes is 81 MPa, while that of the cylinders' split tensile strength is 2.82 MPa. The mix ratio of 1:0.80:1.20:0.25:0.013 (cement: fine aggregate: coarse aggregate: water ratio: supper plasticizer dosage) should be used for the consistent production of a Grade 80 MPa selfcompacting concrete as it will meet the European Standard for Self-Compacting Concrete acceptability criteria for a self-compacting concrete and also give 28 days compressive strength of 81 MPa.
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