At what percent of compressive strength pf concrete do the tensile cracks move farther upward? 33% 50% 85% 100% 90% 5%

Q: Which type of aggregate is more harmful for using in concrete?     Angular     Rounded…

A: Aggregate is generally referred to as a reinforcement to add strength to composite materials such as…

Q: What is pozzolanic material? What are the five advantages of utilising Pozzolana in conjunction with…

A: Pozzolanic materials are siliceous and aluminous materials possessing little or no cementitious…

Q: CRACK AND UNCRACKED STAGE OF CONCRETE 1. What is noncracked, linear stage? 2. What is cracked,…

A: Consider the simple supported beam depicted below, which is relatively lengthy. Assume that the load…

Q: What is the prestress steel loss from steel relaxation at 356 days for a Grade 270 low-relaxation…

A: Given:- Initial stress = 190,000 psi Yield stress = 245,000 psi Time period = 356 days To…

Q: Why does the amount of air in the concrete decrease as the slump increases?

A: Concrete:- Concrete is a composite material made of fine and coarse aggregate that is bonded by a…

Q: What problems are likely to occur if concrete has too low a slump? Too high a slump? How can the…

A: What problems are likely to occur if concrete has too low a slump?   Concrete with a low slump has a…

Q: Concrete shear walls can fail in the following manners except: flexural failure deformation failure…

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Q: Which of the following joints allows for slab shrinkage without forming any crack in the concrete?…

A: The boundary between concrete placements that are purposefully made to ease building is known as a…

Q: Why does the unit weight decrease as the slump increases?

A: Why does the unit weight decrease as the slump increases

Q: Assuming concrete below the neutral axis to be cracked, the shear stress across the depth of a…

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Q: Is it preferable to sustain compressive or tensile loads using concrete?

A: It is preferable to sustain compressive  using concrete.

Q: In joints of precast concrete bridge segments, what are the functions of applying epoxy adhesive?

A: Epoxy adhesive : According to the International Road Federation, epoxy adhesive is used in these…

Q: Select the correct statement from the following: An "under-reinforced" beam condition results in a…

A: Brief concept introduction- (1) Under-reinforced beam- This beam has lower % of steel than the…

Q: Some types of cementitious materials can set while exposed to air. True or false?

A: Cementitious materials are the building materials having binding properties to hold the entire paste…

Types of Cement

Cement is a fine mixture of limestone, chalk, or marl and clay which when mixed with water, becomes compacted due to the formation of strong molecular bonds. Due to hydration, cement turns into a hard mass when left for a sufficient amount of time upon mixing with water. The water turns the cement compounds into gel-like submicroscopic particles having higher surface areas. It is due to the hydration properties of cement, they are often known as hydraulic cement. For instance, Portland cement is a popular example in this category.