Design a portland cement concrete mix for a loading clock

Reference no: EM13297329

Design a Portland cement concrete mix for a loading dock driveway slab. The concrete will be exposed to deicing chemicals and subjected to freezing and thawing in a moist condition. This is severe environmental exposure. The slab is considered flat work for the purpose of determining minimum cement content. The concrete will be made from material that you have tested twenty times with a resulting standard deviation of 210psi. The concrete is to be designed for an f'c of 4500psi and a slump of 4 inches. The slab will be 20 feet by 40 feet by 5 inches. Compute the design and the weights of materials required to mix enough concrete for the slab. If 0.25 ounce of air entraining chemical per 100 pounds of cement per 1% of air will provide the correct amount of air compute the number of ounces you would need for the slab.
Coarse Aggregate: Nominal maximum size is 1 inch
Dry rodded unit weight is 100pcf
Bulk specific gravity is 2.55
Abosorption is 1.0%
Moisture content is 1.0%
Fine Aggregate: Fineness modulus is 2.90
Bulk specific gravity 2.82
Absorption is 2.0%
Moisture content is 1.0%

Reference no: EM13297329

Questions Cloud

Develop 95 percent confidence interval for population mean : a simple random sample of 20 items from a normal population resulted in a sample mean of 17.25 and a sample standard devation of 3.3 a. develop a 90% confidence interval for the population mean. b. develop a 95% confidence interval for the populatio..

Explain the equilibrium constant for a forward reaction : If Kc is the equilibrium constant for a forward reaction, 2 A? B, what is Kc´ for the reaction 4 A? 2B? A) Kc B) Kc C) 2 Kc D) (Kc)2

Estimate the value of the property using a dcf model : Estimate the value of the property using a DCF model with a discount rate and what is the value of the property to the nearest whole dollar?

Describe the greatest lattice energy : Predict which of the following compounds has the greatest lattice energy. A. SCl6 B. AlCl3 C. NaCl D. MgCl2 E. PCl5

Design a portland cement concrete mix for a loading clock : Design a Portland cement concrete mix for a loading dock driveway slab. The concrete will be exposed to deicing chemicals and subjected to freezing and thawing in a moist condition. This is severe environmental exposure.

Determine the change in length of the steel bar : A steel bar of length 30 inches and circular cross section whose diameter varies linearly from 0.50 inches at one end to 0.75 inches at the other is subjected to an axial tensile force of 4.5 kip. Find the change in length of the bar.

State what is the equilibrium concentration of hi : The decomposition of HI(g) is represented by the equation 2HI(g) H2(g) + I2(g) Kc= 64 at 25°C. If the equilibrium concentrations of H2 and I2 at 400°C are found to be [H2] = 5.0x10-4 M and [I2] = 1.4x10-3 M, what is the equilibrium concentration o..

Explain suggest one plausible reason for a % mass : Suggest one plausible reason for a % mass of water that is lower/higher than the true value

Find min acceptable wire diameter for max allowable stress : A 200ft length of steel wire is to carry a tensile load of 340lb. Find the minimum acceptable wire diameter if the maximum allowable stress in the wire is 30ksi, and the lengh of the wire must not increase by more than 2 inches when there is no ch..

User Account

All Pages