The cement paste requirement for concrete is related to the void content of the combined aggregates. True or False?

choose one

What is the maximum size of coarse aggregates in mm needed for the design mix? Round down your answer to the nearest whole number

In proportioning a concrete mix, the coarse and fine aggregates had the following properties respectively; Coarse: Dry weight: 800lb, 3,2% MC, 2.0% AC, Fine: Dry weight 350 lb, 1.2% MC, 2.9% AC. How much should the water be adjusted to account for the agregate moisture?

choose the correct answer

Which type of aggregate is more harmful for using in concrete?     Angular     Rounded     Rough     Elongated

What is the minimum strength that concrete must reach prior to freezing so that the overall strength gain is not affected? OA 5.0 MPa O B) 2.5 MPa O0 4.5 MPa OD) 3.5 MPa When testing for organic impurities in Lab 4, which colour number was deemed to be the limit for acceptable organics in the fine aggregate. ON 1 O B) 2 O D) 3 Concrete is required for the construction of an agricultural dairy barn floor slab in Central Alberta. The floor slab will be exposed to freeze/thaw conditions. Which of the following exposure classes best describes the environmental conditions that the concrete will be exposed to? O Al A-4 O B) S-2 O D) A-2 Slow setting may be caused by: O A Prolonged cold weather when protection is not provided to keep the concrete warm O B) Not having enough fly ash in the concrete OC) Cold as-delivered concrete placed during hot weather OD) Not enough water in the concrete to fully hydrate the cement < O O

a. Write down three aggregate properties that increase segregation in concrete. b. Three of the properties that affect the bond between cement and aggregate and depend on aggregate. write one.

The design of a concrete mix requires 1173 kg/m3of gravel in dry condition,582 kg/m3of sand in dry condition, and 157 kg/m3of free water. The gravelavailable at the job site has a moisture content of 0.8% and absorption of1.5%, and the available sand has a moisture content of 1.1% and absorptionof 1.3%. What are the masses of gravel, sand, and water per cubic meter thatshould be used at the job site?

I need the answer as soon as possible