Materials for Civil and Construction Engineers (2nd Edition)
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ISBN: 9781292154411
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Chapter 7, Problem 7.12QP
a)
To determine
The weight of the components to produce 5,000 lb of concrete.
b)
To determine
Determine the volumes of components to produce
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Design a non-air-entrained concrete mix for a small job with a nominal maximum gravel size of 19 mm. Show the results as follows:a. mass of components to produce 2263 kg of concreteb. volumes of components to produce 1 m3 of concrete
Design a non-air-entrained concrete mix for a small job with a nominal maximum gravel size of 25 mm. Show the results as follows: a. masses of components to produce 2000 kg of concrete b. volumes of components to produce 1 m3 of concrete Use one system of units only as specified by the instructor.
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Chapter 7 Solutions
Materials for Civil and Construction Engineers (2nd Edition)
Ch. 7 - The design engineer specifies a concrete strength...Ch. 7 - A project specifies a concrete strength of 24.1...Ch. 7 - A project specifies a concrete strength of at...Ch. 7 - What is your recommendation for the maximum size...Ch. 7 - A concrete mix with a 3-in. slump, w/c ratio of...Ch. 7 - Prob. 7.6QPCh. 7 - You are working on a concrete mix design that...Ch. 7 - Design the concrete mix according to the following...Ch. 7 - Design the concrete mix according to the following...Ch. 7 - The design of a concrete mix requires 1173 kg/m3...
Ch. 7 - Prob. 7.11QPCh. 7 - Prob. 7.12QPCh. 7 - Students in the materials lab mixed concrete with...Ch. 7 - Students in the materials lab mixed concrete with...Ch. 7 - Why is it necessary to measure the air content of...Ch. 7 - What do we mean by curing concrete? What will...Ch. 7 - Discuss five different methods of concrete curing.Ch. 7 - Draw a graph showing the typical relation between...Ch. 7 - Why is extra water harmful to fresh concrete, but...Ch. 7 - Discuss the change in volume of concrete at early...Ch. 7 - Discuss the creep response of concrete structures....Ch. 7 - Prob. 7.22QPCh. 7 - On one graph, draw a sketch showing the typical...Ch. 7 - Using Figure 7.34, a. Determine the ultimate...Ch. 7 - Three concrete mixes with the same ingredients,...Ch. 7 - Three concrete mixes with the same ingredients,...Ch. 7 - Three 100 mm 200 mm concrete cylinders with water...Ch. 7 - Students in the materials class prepared three 4 ...Ch. 7 - Three 150 mm 300 mm concrete cylinders with water...Ch. 7 - Three 6 in. 12 in. concrete cylinders with water...Ch. 7 - A normal-weight concrete has an average...Ch. 7 - Discuss the significance of the compressive...Ch. 7 - What is the standard size of PCC specimens to be...Ch. 7 - Prob. 7.34QPCh. 7 - What is the purpose of performing the flexure test...Ch. 7 - What are the advantages of using a third-point...Ch. 7 - Consider a standard flexural strength specimen of...Ch. 7 - To evaluate the effect of a certain admixture on...Ch. 7 - To evaluate the effect of a certain admixture on...Ch. 7 - Prob. 7.40QPCh. 7 - Prob. 7.41QPCh. 7 - A normal-weight concrete has an average...Ch. 7 - Three batches of concrete were prepared using the...Ch. 7 - Three batches of concrete were prepared using the...Ch. 7 - Prob. 7.45QPCh. 7 - Prob. 7.46QPCh. 7 - Discuss two nondestructive tests to be performed...Ch. 7 - Discuss the concept of concrete maturity meters.Ch. 7 - Discuss four alternatives that increase the use...Ch. 7 - What is self-consolidating concrete? How are its...Ch. 7 - Prob. 7.51QPCh. 7 - Two 6 in. 12 in. concrete cylinders with randomly...Ch. 7 - Discuss the concept of high-performance concrete....Ch. 7 - Comparing PCC with mild steel, answer the...Ch. 7 - Prob. 7.55QP
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- Design a non-air-entrained concrete mix for a small job with a nominal maximum gravel size of 25 mm (1 in.). Show the results as follows: a. masses of components to produce 2000 kg (4400 lb) of concreteb. volumes of components to produce 1 m3(36 ft3) of concreteUse one system of units only as specified by the instructor.arrow_forwardDesign a non-air-entrained concrete mix for a small job with a nominal maxi-mum gravel size of 25 mm. Show the results as follows: a. masses of components to produce 2000 kg of concreteb. volumes of components to produce 1 m3 of concreteUse one system of units only as specified by the instructor.arrow_forwardDesign a non-air-entrained concrete mix for a small job with a nominal maxi-mum gravel size of 25 mm (1 in.). Show the results as follows:a. masses of components to produce 2000 kg (4400 lb) of concreteb. volumes of components to produce 1 m3 (36 ft3) of concreteUse one system of units only as specified by the instructor.arrow_forward
- You are to design the concrete mix proportion for concrete foundations (single footing) in a residential project in Pampanga, with a required 28-day design strength of 5000 psi. Maximum aggregate size to be used is ¾ inch, and the allowed slump is 3-4 inches. Use conversion factor 1 yd = 3 ft. Determine the mixture proportions of water, cement, coarse aggregate, and fine aggregate in terms of Ib/y^3, as well as air content in %. Express final answers in two decimal places. Cement: Type I, Specific Gravity (SSD) = 3.15 Gravel: Bulk Specific Gravity (SSD) = 2.59, Dry Rodded unit weight = 105.4 lb/ft^3. Absorption Capacity 0.89%, Surface Moisture 0.00 % River Sand: Bulk Specific Gravity (SD) = 2.61, Absorption Capacity 2.30%, Surface Moisture 0.00%. Fineness Modulus = 2.70 Refer to the Table of Values in the picturesarrow_forwardYou are working on a concrete mix design that requires each cubic yard ofconcrete to have 0.45 water–cement ratio, 1165 kg/m3 of dry gravel, 4% air content, and 335 kg/m3 of cement. The available gravel has a specific gravity of Ggravel = 2.7, a moisture content of 1.6%, and absorption of 2.4%. The available sand has a specific gravity of Gsand = 2.5, a moisture content of 4.8%, and absorption of 1.5%. For each cubic meter of concrete needed on the job, calculate the mass of cement, moist gravel, moist sand, and water that should be added to the batch. Summarize and total the mix design when finished (don’t include air entrainer in summary).arrow_forwardEstimate the approximate quantity of Cement, Fine aggregate, Coarse aggregate and Water, for five (5) Concrete Cylinders. If one finalized the ratio from ACI-211 Mix design for specified strength as (1:1.3:2) and W/C of 0.48. (Assume the given ratio is by weight)arrow_forward
- Propose suitable Methods of finding Workability of Dry, Normal and Self Compacting Concretearrow_forwardWith sketches explain the various specifications for self compacting concrete.arrow_forwardHaving a Concrete Mix Ratioof 1: 2: 2.5 (by mass), what isthe mass of Gravel needed to create a 100 kg of concrete?Water/cement ratio is 0.55.arrow_forward
- Problem Solving You are to design the concrete mix proportion for concrete foundations (single footing) in a residential project in Pampanga, with a required 28-day design strength of 5000 psi. Maximum aggregate size to be used is ¾ inch, and the allowed slump is 3- 4 inches. Use conversion factor 1 yd = 3 ft. Required: Determine the mixture proportions of water, cement, coarse aggregate, and fine aggregate in terms of Ib/yd?, as well as air content in %. Express final answers in two decimal places.arrow_forwardUse the list below of design requirements/assumptions to come up with the concrete mix design: - A slump of 10mm to 30mm.- A characteristic 28-day compressive strength of 30 N/mm2 (5% failures permitted).- The standard deviation of the tests is σ = 6.1 N/mm².- Ordinary Portland cement (42.5 N).- Crushed sand of 2.7 density and 60% passing through a 600 µm sieve.- Crushed coarse aggregate 2.6 density and 20mm are usedarrow_forwardExample 6: Design a concrete mix for slab with dimension of (5x5x2.5) according to ACI by Volumatic method for the following stipulation by: 1- characteristic compressive strength at 28 — days = 30 Mpa 2- Nominal maximum size of aggregate = 19 mm 3- Slump value = 100 mm 4- Degree of quality control = High 5- Specific gravities of gravel and sand are 2.6 and 2.64 respectively 6- Density of gravel and sand are 1600 kg/m® and 1800 kg/m? respectively 7- Standard deviation is assumed to be 4 Mpa 8- F.M of sand is 2.6arrow_forward
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