50 cubic feet of 2:2-1/2:4 (by weight) concrete are to be produced. The constituents have the following properties= Constituent SSD Density (pcf) Moisture Cement 197 Sand 164 5% excess Coarse Aggregate 2% deficit 168 What are the required order quantities if the design calls for 5.5 gallons of water per sack and 5% entrained air?

50 cubic feet of 2:2-1/2:4 (by weight) concrete are to be produced. The constituents have the following properties= Constituent SSD Density (pcf) Moisture Cement 197 Sand 164 5% excess Coarse Aggregate 2% deficit 168 What are the required order quantities if the design calls for 5.5 gallons of water per sack and 5% entrained air?

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

Pricing Concrete Work

The concrete work in a project usually holds a high-end cost in terms of cost and value of the work. It becomes an important step in calculating the cost associated with concrete while preparing the project scale. The cost of making concrete depends on the cost of building materials, mixed materials, labor, and machinery. A concrete contractor builds structures from concrete, usually managing all the steps of the process from assembling ingredients to building a holding structure and preparing the mixture. This person or team oversees the delivery and unloading of goods to ensure that they are done properly. Nowadays, most of the concrete in the United States comes from manufacturers working abroad, usually with branches and plants within the provinces. Contributions can range from pre-mixed concrete to basic ingredients, the consumer company then mixes it. Many American-based concrete companies, however, offer concrete products, such as ballads, bricks, countertop, concrete pipe, and building products, as well as concrete construction and installation materials. This article covers both types of suppliers for this set of building materials.

Question

50 cubic feet of 2:2-1/2:4 (by weight) concrete are to be produced. The constituents have the following properties:
Constituent
SSD Density (pcf) Moisture
Cement
197
Sand
164
5% excess
Coarse Aggregate
2% deficit
168
What are the required order quantities if the design calls for 5.5 gallons of water per sack and 5% entrained air?

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CONCRETE TECHNOLOGY// THEORY PART.
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One cubic yard of fresh concrete mix includes 1900 lbs coarse and 1150 lbs fine aggregates. Water-cement ratio (W/C) for the mix is 0.5. Given information: Concrete weight = 150 pcf Weight of standard cement bags 94 lbs Water weight = 8.34 pounds per gallon Approximately how many bags of Portland cement should be added to each cubic yard of this mix? 4 bags 5 bags 6 bags 7 bags
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 Fine Aggregate: Natural Sand Oven-dry specific gravity: 2.60 Absorption: 3.20% Moisture content of fine stockpile: 3.50% Fineness Modulus: 2.80 265 lb/yd³ 675 lb/yd³ 6.00 % 1816 lb/yd³ 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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