Three standard mortar cubes were made using nonpotable water available at the job site, and three others were made using potable water. The cubes were tested for compressive strength after seven days of curing and produced the following failure loads in kilograms: Based on these results only, would you accept that water for mixing concrete according to ASTM standards? Why?

Q: If you knew that the cubic compressive strength of a certain type of concrete is 35 MPa, then…

A: Given:- compressive strength=35MPa=35N/mm2 To find:- Load

Q: After concreting is completed, your project manager raises concern about the quality of the concrete…

A:

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: normal-weight concrete has an average compressive strength of 4500 psi. What is the estimated…

A: Given-Normal weight concrete having compressive strength of 4500 psi. Required-To estimate the…

Q: To evaluate the effect of a certain admixture on the flexure strength of concrete, two mixes were…

A: Solution Given data cross section= 0.15m *0.15m Span= 0.45 m

Q: To evaluate the effect of a certain admixture on the flexure strength of concrete, two mixes were…

A:

Q: A normal-weight concrete has an average compressive strength of 4500 psi. What is the estimated…

A: It is required to determine the estimated modulus of elasticity of the concrete. Here, fc’ is the…

Q: Mixing and handling can significantly alter the air content of fresh concrete. Thus, field tests are…

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

A: Given data: Compressive strength of the test specimens after 28 days fc1=30.5 MPafc2=29.6…

Q: Students in the materials lab mixed concrete with the following ingredients: 22.1 lb of cement, 41.6…

A:

Q: A normal-weight concrete has an average compressive strength of 30 MPa. What is the estimated…

A: The expression for modulus of elasticity is given by, Here, f’c is the average compressive strength…

Q: To evaluate the effect of a certain admixture on the flexure strength of concrete, two mixes were…

A: Modulus of rupture in bending is the maximum fiber stress at failure. In a torsion test and the…

Q: To evaluate the effect of a certain admixture on the flexure strength of concrete, two mixes were…

A: Modulus of rupture in bending is the maximum stress at failure and in torsion is the maximum shear…

Q: Students in the materials lab mixed concrete with the following ingredients: 32.1 lb of cement, 51.6…

A: Solution: Given: Cement = 32.1 lb  = 14.6 kg Sand = 51.6 lb      = 23.4 kg Gravel = 67.5 lb    =…

Q: The results of a laboratory experiment to evaluate the effects of a plasticizer are shown. a.…

A: Given data: Plasticizers are used for various purposes according to the requirement of…

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

A:

Q: A normal-weight concrete has an average compressive strength of 4500 psi. What is the estimated…

A: compressive strength of concrete      = 4500psi (1)Modulus of elasticity of concrete:-

Q: Two batches of concrete cylinders were made with and without a calciumchloride (CaCl2) accelerator…

A: (a) It is required to plot the graph between curing time and compressive strength.

Q: Three batches of concrete were prepared using the same materials and ingredients, except that they…

A: Water Cement Ratio means the ratio between the weight of water to the weight of cement used in the…

Q: In order to evaluate the sustainability of non-potable water available in the job site for mixing…

A:

Q: To evaluate the effect of a certain admixture on the flexure strength of concrete, two mixes were…

A: a) The formula of modulus of rupture of the beam is given by,

Q: In order to evaluate the suitability of nonpotable water available at the job site for mixing…

A: Given values: Compressive strength of mortar cubes after 7 days of curing tested and failure loads…

Q: in a ready mixed concrete plant, 28-day compressive strength results of 32-cylinder specimens…

A: specimenCompressive strengthDeviation () Squared DeviationAvg. of last 3…

Q: Three batches of concrete were prepared using the same materials and ingre-dients, except that they…

A: The modulus of rupture can be calculated as, σ=3FL2bd2 Given here: b=4'', d=4'', L=12'' Substitute…

Q: 2. What is the standard size of PCC specimens to be tested for compressive strength? If a smaller…

A: 2). The standard size of the PCC specimen is used in testing is 150x150x150 mm. most 150 mm cubes…

Q: Determine the reaction forces Ax and Bx of the structure. Self-weight w=0.2 tn/m, P=20 tn

A: