140 E 120 100 80 60 40 20 0.2 0.3 0.4 0.5 0.6 0.7 0.8 Water-cement ratio Coefficient of permeability, 10 14 m/s

Q: Three 100*200 mm cylindrical concrete specimens were tested for 28 days compressive strength and…

A: Solution: Given: Three Compress strengths of same concrete sample: C1=25.5MPa C2=28.6Mpa C3=24.8MPa…

Q: Discuss five different desirable characteristics of aggregate used in Portland cement concrete (PCC)

A: Here some of the most desirable characteristics of aggregates used in portland cement concrete are…

Q: A concrete mix includes the following ingredients per cubic meter: a. Cement = 400 kg b. Water = 176…

A: Given, Cement= 400 kg Water= 176 kg

Q: A concrete mix with a 75 mm slump, w/c ratio of 0.50, and sand with a fineness modulus of 2.4…

A: W/c ratio =0.5 Fineness modulus=2.4 Coarse aggregate = 1009 kg/m3                              =1700…

Q: Grade of Specimen Mass of specimens (g) concrete 7 days 14 days 28 days Air Water Air Water Air…

A: We know, Density=MassVolume Here, volume = 100 x 100 x 100 = 106 mm3 = 0.001 m3  The density is…

Q: A concrete is composed of a mixture 286 lbm of cement (SG = 3.11), 520 kgm gravel (SG 2.71), 260 kgm…

A:

Q: The design of a concrete mix requires 1173 kg/m3 of gravel in dry condition,582 kg/m3 of sand in dry…

A: Given data :Weight of Gravel indry state=1173 kgAvailable absorption % and moisture content of Job…

Q: A concrete mix includes the following ingredients per cubic meter: Cement%3D400 kg Water=184 kg No…

A:

Q: Chapter 13 Question: What is the elasticity of concrete for a normal weight mix (unit weight equal…

A:

Q: A concrete mix consists of 5 gallons of water for each bag of cement. What is the expected…

A: To find the strength of the concrete depending on the values given. 5 gallons of water per each bag…

Field applications of hydraulic conductivity

Hydraulic conductivity is one of the hydraulic properties of soil defined as a measurement of the ability of a porous medium to permit water movement or fluid flow through it. It is denoted by the letter K. It is influenced by the density and viscosity of the fluid. It is also called permeability. Hydraulic conductivity is defined as the ratio of velocity to the hydraulic gradient. The different methods used to determine the hydraulic conductivity are laboratory methods (constant head permeability tests and falling head tests), in-situ field methods (pumping in and pumping out tests), small scale field tests (infiltration tests and slug tests), and indirect methods such as estimation from grain size, consolidation test data, and horizontal capillary test. The pedotransfer function (PTF) method is a specific empirical estimating approach employed in the soil sciences is also used to determine the hydraulic conductivity of the soil.