How long can ready-mix concrete remain in the mixer and still be used?

Q: A trial concrete mix is to be prepared for a garage floor which is subjected to freezing. and…

A:

Q: 7-What is the effect of aggregate grading on the properties of concrete? 8-Describe kinds of slump…

A: Answer 7. Effect of aggregate on the properties of concrete.

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: 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: an you explain the steps in Rapid Method of Concrete Mix Design? Tha

A: The Rapid Method of Concrete Mix Design is also called the Accelerated Method and it determines the…

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: Give any two examples of samples of different types of aggregates and note the different shapes,…

A: This question is related to the Construction Materials from Civil Engineering.Find out - Any two…

Q: Assume that you are going to make a three cubic yard (3yd³) of concrete. Create your own mix design…

A: The design strength = 3.8 ksiThe slump should = 3 to 4 in.The maximum size of aggregate = 2 inUnit…

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.