Please answer a and b. Thank you **Concrete Workability in Hot Conditions**When building a structure in Arizona during the summer, you may notice that the aggregate stockpile is exposed to the sun, causing the material to be quite dry. This situation raises two important concerns:1. **Absorption of Mixing Water by Dry Aggregate:** - **Question**: Should you be concerned that the dry aggregate "sucks" the mixing water from the fresh concrete? - **Consideration**: Yes, there is a potential risk that dry aggregate can absorb some of the mixing water, which can affect the concrete's workability and consistency.2. **Procedures to Maintain Workability:** - **Question**: What procedures would you recommend to avoid problems with the workability of concrete when this dry aggregate is used? - **Recommendation**: To mitigate these issues, consider pre-wetting the aggregate before mixing, adjusting the water content, or using water-reducing admixtures to ensure proper hydration and workability of the concrete.

Introduction- A bulk material stockpiling is a mound or store site for bulk materials that is used…

You are building a structure in Arizona during the summer. You notice that the aggregate stockpile is exposed to the sun and that the material is quite dry. (a) should you be concerned that the dry aggregate “sucks" the mixing water from the fresh concrete? (b) what procedures would you recommend to do avoid problems with the workability of concrete when this dry aggregate is used?

You are building a structure in Arizona during the summer. You notice that the aggregate stockpile is exposed to the sun and that the material is quite dry. (a) should you be concerned that the dry aggregate “sucks" the mixing water from the fresh concrete? (b) what procedures would you recommend to do avoid problems with the workability of concrete when this dry aggregate is used?

Fundamentals Of Construction Estimating

4th Edition

ISBN:9781337399395

Author:Pratt, David J.

Publisher:Pratt, David J.

Chapter11: Pricing Concrete Work

Section: Chapter Questions

Problem 4RQ

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Concept explainers

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.

Question

Please answer a and b. Thank you

**Concrete Workability in Hot Conditions**

When building a structure in Arizona during the summer, you may notice that the aggregate stockpile is exposed to the sun, causing the material to be quite dry. This situation raises two important concerns:

1. **Absorption of Mixing Water by Dry Aggregate:**
- **Question**: Should you be concerned that the dry aggregate "sucks" the mixing water from the fresh concrete?
- **Consideration**: Yes, there is a potential risk that dry aggregate can absorb some of the mixing water, which can affect the concrete's workability and consistency.

2. **Procedures to Maintain Workability:**
- **Question**: What procedures would you recommend to avoid problems with the workability of concrete when this dry aggregate is used?
- **Recommendation**: To mitigate these issues, consider pre-wetting the aggregate before mixing, adjusting the water content, or using water-reducing admixtures to ensure proper hydration and workability of the concrete.

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