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) 265 lb/yd3 675 lb/yd3 Water Cement Air 6.00 % Coarse Aggregate 1816 Ib/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 What is the theoretical unit weight (in Ibs/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) 265 lb/yd3 675 lb/yd3 Water Cement Air 6.00 % Coarse Aggregate 1816 Ib/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 What is the theoretical unit weight (in Ibs/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 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.

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)
265 lb/yd3
675 lb/yd3
Water
Cement
Air
6.00 %
Coarse Aggregate
1816 Ib/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 Ib/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
What is the theoretical unit weight (in Ibs/yd®) 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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