drag coefficient of concrete

I was looking for a list that I once had but lost that had standard drag factors for example: Dry asphalt .075 Wet Snow .025 or others I know the drag sled is most accurate but if anyone has the estimated standards I would appreciate it.

Drag force is of interest for applications like wind force on structures and drag force due to air resistance or water resistance on moving vehicles or other moving objects. PCI's Design Handbook says the concrete-to-concrete friction factor for dry conditions is 0.80. The drag coefficient is a number that aerodynamicists use to model all of the complex dependencies of shape, inclination, and flow conditions on aircraft drag.This equation is simply a rearrangement of the drag equation where we solve for the drag coefficient in terms of the other variables. A drag factor, like a coefficient of friction, is actually a non-dimensional number, but is often used in conjunction with the … RE: Concrete friction coefficients steve1 (Structural) 23 Mar 05 11:37 Several years ago the PCA advised me, via email, that I should use 0.4 as COF between a precast concrete building and a cast in place foundation.

Sources (more). Therefore, the drag coefficient can often be treated as a constant. For example, in the energy balance, the dissipation function represents rate of viscous dissipation in units of energy/(volume time), t u! … 1 BRIDGE GIRDER DRAG COEFFICIENTS AND WIND RELATED BRACING RECOMMENDATIONS By ZACHARY HARPER A THESIS PRESENTED TO THE GRADUATE SCHOOL OF THE UNIVERSITY OF FLORIDA IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE O F MASTER OF SCIENCE UNIVERSITY OF FLORIDA 2013 PAGE 2 2 2013 Zachary Harper PAGE 3 3 … The latest edition of PCA's Concrete Masonry Handbook, Appendix A, gives a precast concrete-to-concrete masonry friction coefficient of 0.4 based on a safety factor of two. The Little Book of Tire Pavement Friction Version 1.0 Submitted for Review and Comment Pavement Surface Properties Consortium September 2012 Gerardo W. Flintsch Kevin K. McGhee Edgar de León Izeppi Shahriar Najafi Concrete 152/85 120 100 Corrugated steel - 60 60 Manning’s Equation roughness coefficient (n) Material Values for n Range Typical Design Value Polyethylene pipe 0.008-0.011 0.009 Uncoated cast or ductile iron pipe 0.012-0.015 0.013 Corrugated steel pipe 0.021-0.030 0.024 Concrete pipe … The settlement of particles is of great importance in many areas. Is there a standard method for measuring the coefficient? THE DIFFERENCE BETWEEN COEFFICIENT-OF-FRICTION AND DRAG FACTOR . The drag coefficient is a number that aerodynamicists use to model all of the complex dependencies of shape, inclination, and flow conditions on aircraft drag.This equation is simply a rearrangement of the drag equation where we solve for the drag coefficient in terms of the other variables. What's a reasonable coefficient of friction that will help to prevent slip-and-fall accidents on concrete floors? The drag coefficient value for two square cylinders was found to be depended on the dimension of the pier, spacing between piers and location of the piers relative to each other. Stock Vehicles. Tables and graphs are available with values of drag coefficient for various common shapes and for … F = coefficient of subgrade friction (F = 1.2 to 2 for pavement, F = 1.5 for concrete slab on grade) L = Length of slab between control joint (feet) w = weight of slab (lb/ft 2) f s = allowable working stress of reinforcement (lb/in 2) is usually 0.67f y to 0.75 f y, f y is yield strength of … Frontal Area formula = Height * Width * .84 (Height and Width in feet) Frontal Area formula = (Height/12) * (Width/12) * .84 Return to Main Page Coefficient of Drag List. This is a preview of subscription content, log in to check access. in the mixture) and the method of finishing/texturing (e.g., burlap, grooving, tining) used on a concrete paving material. Rolling Resistance Coefficient: 0.014. May 2005.

= ). For a streamlined body to achieve a low drag coefficient, the boundary layer around the body must remain attached to the surface of the body for as long as possible, causing the wake to be narrow. Tire-Roadway Friction Coefficients on Concrete and Asphalt Surfaces Applicable for Accident Reconstruction 900103. The drag coefficient Cd is equal to the drag D divided by the quantity: density r times half … Log In or Register.

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