a. When is it necessary to consolidate concrete by vibration in test method C231? Discuss the process  of vibration when placing and consolidating the sample. b. When rodding a layer of concrete in method C138, is it okay to hit the bottom of the measure? If not,  how is it supposed to be done? c. Calculate the yield of concrete if the mass of the batch is 4800 kg and its density is found to be 350  kg/m3.

Q: 1.46: A contractor claims that the mean compressive strength for a concrete mix is 5000 psi (μ) and…

A: Given data contractor’s correct or not contractor’s correct or not

Q: Q3. Three concrete mixes with the same ingredients, except the amount of mixing water, and their…

A:

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: The following mix design information is provided to you for 1 m³ concrete. • Air content = 5% • w/cm…

A: Reference : Concrete technology, Mix design ACI 318 mix design code Given : Air content, w/c ratio,…

Q: Problem 4.87 Figure 40 mm r 10 mm 20 mm 5 mm 20 mm ▾ Part A max Value Submit Determine the maximum…

A:

Q: Three concrete cylinders are cast in the field and cured on site. After 3 days they are brought and…

A: Given, Failure load for sample 1 = 212000 N  Failure load for sample 2 = 225000 N

Q: 6. A sample of lightweight coarse aggregate weighs 532.3 g when oven-dried, 615.7 g when saturated…

A:

Q: In designing concrete structures, normally the maximum aggregate  sizes adopted are within ranges of…

A:

Q: 4-How the consistency of cement paste is measured? 5-State the significance of initial setting time…

A: ANS 4: A cement paste with a standard consistency is one that will allow a vicat plunger with a 10…

Q: Please solve the following problem with step by step soutions

A: Step 1: Step 2: Step 3: Step 4:

Q: 4-How the consistency of cement paste is measured? 5-State the significance of initial setting time…

A: Solution:   1. Vicat apparatus is the instrument used to measure the standard consistency of cement.…

Q: What moisture condition should the coarse and fine aggregate be in when mixing the concrete? A…

A: Mixture of cement, fine aggregates , coarse aggregates ,water and admixtures in defined proportions…

Types of Concrete

Concrete is the fundamental material used in civil engineering such as building materials for building structures. Concrete is an aggregate mixture of cement, sand, and fine and coarse rock pieces. The cement acts as a binding material that holds the compositions together, sets, and hardens with time. Apart from cement, there are other different types of binding materials used, such as lime concrete, bitumen, asphalt, and so on.