Fundamentals of property and compositions management concrete mix and concrete

The choice of the concrete composition following set research tasks must satisfy requirements: 1-the maximum achievable strength on given starting materials; 2-the required formability, corresponding to accepted vibration-impact-peristaltic pressing; 3-a level dehydration mixture, providing a residual W/C , close normal density cement paste. conditions are necessary and sufficient when using physical-analytical method designing composition. Distinctive features use large amount information absence arbitrary coefficients, technological constants, or parameters. data for assignment compositions determined according preliminary laboratory experiments, parameters mechanisms equipment, design characteristics structure be formed. For experimental study, total six independent streams initial used: 1-physical mechanical properties constituents ( R c ρ ° [ V/C ], р с γ 3 shch sh ); 2-laboratory tests raw materials in mix (a, b, c, Ku, A, B); 3-design b F, W, OK, Z h 4-characteristics product concreted V, h, l, μ 5-technological mechanisms, devices th, tb, TO, t0 6-the cost per unit volume Sc, Cn, Ssh, Se, Sg ). Obviously, listed comprehensively characterizes used forming product. previously developed pipes, addition above, require, assigning concrete, take into account observance balance masses mixture compacted, modified concrete. This should manifested checking equation absolute volumes original compacted (dewatered)