What are the two main reasons that steel corrodes inside reinforced concrete? ingress of chlorides from deicing chemicals carbonation that reduces the internal pH the use of a low w/

Q: i. How and why do we test ii. What does it tell us about the mix iii. What is expected to happen…

A: Compressive strength is a very important property of materials and structures. It measures the…

Q: choose the correct option please Silica fume admixture increase concrete strength up to  60 MPa  120…

A: This question is related to Concrete technology from Civil Engineering. In this question ask about…

Q: Why do we need to find the Specific Gravity and Absorption of Fine Aggregate, Surface Moisture of…

A: Introduction:- Engineers value specific gravity because it assists them in establishing the…

Q: Hydration of cement is due to chemical action of water with Tetra calcium Aluminoferrite Tricalcium…

A: Answer: d)Tricalcium silicate and Dicalcium silicate

Q: Any potable water is suitable for making concrete. However, some nonpotable water may also be…

A: Portable water Portable water is defined as water that is suitable for human consumption i.e, water…

Q: Answer by true or false for the following Using alkaline water in mixing concrete reduces the…

A: The alkali-aggregate reaction is caused mainly due to the OH- ions associated with alkalies. The…

Q: Q1A- the process of hardening the concrete mixes by keeping its surface moist for a certain period…

A:

Q: This is a type of admixture that is used to slow the rate of concrete hardening

A: The water reducer reduces the amount of water content of the concrete mix. The retarder increase the…

Q: Question Identify the correct sequence of the concrete manufacturing process by rearranging the…

A: The answers with explanation has been provided Explanation:

Q: Discuss Sulfate Attack on Concrete

A: Sulfate attack: It is one of the causes for damage of concrete deterioration, by making concrete…

Q: Although the constituents of concrete (aggregate and hydrated cement paste) behave in a linear…

A: Although aggregate and hydrated cement paste have linear stress-strain curves but the concrete…

Q: Which of the following cements is cement with at least 50% slag density and is suitable for use in…

A: The cement is a main substance in concreting which is used as a binding material and helps to…

Q: Reinforcing steel inside concrete is protected by the passive layer that forms due to the high pH…

A: Answer:- Mechanism: 1. Ingress of chlorides deicing chemicals: The corrosion of steel reinforcement…

Q: Choose one common mineral that is used in cement and explain how this affects the performance of…

A: one common mineral that is used in cement is lime.

Q: Which of the following statements is correct? A) Pozzolans react with Calcium Silicate Hydrate…

A: Pozzolans are silicate-based compounds that combine with the calcium hydroxide produced whenever…

Q: This refers to a change from liquid state to solid state of cement paste

A: Setting is the process in which cement concretee starts solidifying and gaining strength. Curing is…

Q: Which of the following directly causes sulfate attack in concrete? CH Delayed ettringite formation…

A: Sulfate attack in concrete is mainly caused by the reaction of sulfate ions with calcium hydroxide…

Q: 24 - Which of the following is the common effect of pozzolan on concrete. A) Decrease in hydration…

A: Given data:  Which of the following is the common effect of pozzolana on concrete.A) Decrease in…

Q: At saturated surface dry (SSD) an aggregate's moisture condition is equal to its: air dry…

A: When aggregate particles are completely having dry surfaces, this situation is called the saturated…

Q: (a) In general, which provides better fire performance, carbonate or silicate aggregates? Why? (b)…

A: (a). Carbonate aggregates provide much better fire resistance than the silicate aggregates because…

Q: The process of conversion of plastic concrete to solid stage is called About 70% to 80% of cement is…

A:

Q: Concrete is required for the construction of an agricultural dairy barn floor slab in Central…

A: A -2 class of exposure is structurally reinforced concrete exposed to moderate to severe manure with…

Q: Compressive strength developed with the age of hardening and decrease with the increase of water…

A:

Q: The black color in bricks results due to alumina O magnesia iron oxide O gravel O O O

A: Alumina does not impart any colour to brick yet, imparts moulding and plasticity.

Q: From the knowledge of the effects of GGBS, PFA and microsilica, indicate whether their inclusion to…

A: Brief concept introduction- GGBS, PFA and microsilica- GGBS (Ground Granulated Blast Slag) is a…

Q: It is not enough to use sulfate resisting cement in concrete exposed to sea water

A: Soils, marine, and wastewater with high levels of sulfates are frequent hostile conditions that…

Q: Water/cement ratio of concrete is the ratio of Volume of water to the volume of cement Volume of…

A: Introduction : The given question is related with building material . Water cement ratio is…

Q: Reinforced concretes are usually attacked by water and rusted. This is due to, a. Low density…

A: Reinforced cement concrete is a type of concrete made with a combination of cement concrete and…

Q: Los Angeles abrasion test evaluates the aggregates' soundness and durability. Select one: O True O…

A: Los Angeles abrasion test is used for the aggregates to be used for highway material.

Q: If a water reducer is added to the concrete mix without changing other ingre-dients, what will…

A: The water reducer in concrete increases the workability of concrete. The workability of concrete is…

Q: why do we need to know the Specific Gravity and Absorption of Fine Aggregate, Surface Moisture of…

A: (1) Specific Gravity: Since, specific gravity is the ratio of densities. Therefore, specific gravity…

Types of Composite

Composite materials are formed by merging two components that have different chemical and physical properties. The merged output is termed as a composite, whose properties are completely different from the individual components. Composite materials also have better strength than the individual components.Composite materials usually have two main parts, reinforcement material, and matrix material. The matrix material acts as a binder and surrounds the fiber of another material that bears a much higher strength. This material is known as the reinforcement material. The matrix materials are usually high-strength additives resins, while the fibers of the reinforced material can be random, oriented, and in a mat format.Composite materials are also known as fiber-reinforced composite polymers because they are composed of the polymer matrix which is reinforced to laboratory-created fibers or naturally occurring fibers, such as glass fibers, carbon fibers, or aramid fibers. Under the application of external loads, the matrix material absorbs and transfers the loads to the fibers, these fibers in return provide good compressive strength, tensile strength, and stiffness to the fiber-reinforced composite materials.Depending upon the matrix and the reinforcement material, different properties can be induced to the fiber-reinforced composite materials, including good corrosion resistance properties. The most common matrix material is the resin while the glass fibers act as the reinforcement material. Strong fibers provide strength and stiffness to the composite materials while, a soft and flexible resin provides shape to the composite materials.