The following table represents a concrete mixture that has not been completely proportioned. The values given are the theoretical mixture proportions (oven dry basis). Material properties are also provided. Please answer the question at the end of the information given. Theoretical Mixture Proportions (oven dry basis) Water Cement Air Coarse Aggregate ASTM C 150 Type I Cement: Specific Gravity: 3.15 Coarse Aggregate: Well-graded 3/4 in. NMSA rounded gravel Oven-dry specific gravity: 2.63 Absorption: 1.10% Moisture content of stockpile: 3.10 % Oven-dry bulk density: 101.5 lb/ft³ 265 lb/yd³ 675 lb/yd³ 6.00 % 1816 lb/yd³ Fine Aggregate: Natural Sand Oven-dry specific gravity: 2.60 Absorption: 3.20% Moisture content of fine stockpile: 3.50% Fineness Modulus: 2.80 What is the theoretical unit weight (in lbs/yd³) of fine aggregate in this concrete mixture (oven dry basis)? Round to the nearest whole number and do not include units when entering your answer.

The following table represents a concrete mixture that has not been completely proportioned. The values given are the theoretical mixture proportions (oven dry basis). Material properties are also provided. Please answer the question at the end of the information given. Theoretical Mixture Proportions (oven dry basis) Water Cement Air Coarse Aggregate ASTM C 150 Type I Cement: Specific Gravity: 3.15 Coarse Aggregate: Well-graded 3/4 in. NMSA rounded gravel Oven-dry specific gravity: 2.63 Absorption: 1.10% Moisture content of stockpile: 3.10 % Oven-dry bulk density: 101.5 lb/ft³ 265 lb/yd³ 675 lb/yd³ 6.00 % 1816 lb/yd³ Fine Aggregate: Natural Sand Oven-dry specific gravity: 2.60 Absorption: 3.20% Moisture content of fine stockpile: 3.50% Fineness Modulus: 2.80 What is the theoretical unit weight (in lbs/yd³) of fine aggregate in this concrete mixture (oven dry basis)? Round to the nearest whole number and do not include units when entering your answer.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

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.

Question

The following table represents a concrete mixture that has not been completely proportioned. The values given are the theoretical mixture proportions (oven dry basis). Material properties are also provided. Please answer the question at the end of the information given.

**Theoretical Mixture Proportions (oven dry basis)**

| Component | Proportion |
|-------------------|---------------|
| Water | 265 lb/yd³ |
| Cement | 675 lb/yd³ |
| Air | 6.00% |
| Coarse Aggregate | 1816 lb/yd³ |

**ASTM C 150 Type I Cement: Specific Gravity:** 3.15

**Coarse Aggregate:**

- Well-graded 3/4 in. NMSA rounded gravel
- Oven-dry specific gravity: 2.63
- Absorption: 1.10%
- Moisture content of stockpile: 3.10%
- Oven-dry bulk density: 101.5 lb/ft³

**Fine Aggregate:**

- Natural Sand
- Oven-dry specific gravity: 2.60
- Absorption: 3.20%
- Moisture content of fine stockpile: 3.50%
- Fineness Modulus: 2.80

**Question:** What is the theoretical unit weight (in lbs/yd³) of fine aggregate in this concrete mixture (oven dry basis)? Round to the nearest whole number and do not include units when entering your answer.

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Step 1: What we need to calculate

The question is based on the concrete mixture (oven-dry basis). The question gives the water, air, coarse aggregate, and cement proportions. The theoretical unit weight of fine aggregate in a concrete mixture has to be determined.

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