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 265 lb/yd³ Cement 675 lb/yd³ 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 quantity in Ib/yd³ of coarse aggregate to batch for this mixture given its current stockpiled moisture content? 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 265 lb/yd³ Cement 675 lb/yd³ 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 quantity in Ib/yd³ of coarse aggregate to batch for this mixture given its current stockpiled moisture content? 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

See similar textbooks

Similar questions

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 water to cement ratio (w/cm) for this mixture? Round to two decimal places.
A concrete mix includes the following ingredients per cubic meter: Cement%3D400 kg Water=184 kg No admixture Table below shows possible alternatives mix ingredients. Indicate in the appropriate boxes in the table what will happen in each case for the workability and the ultimate compressive strength as increase, decrease or approximately the same. What will happen? Cement Water Admixture (kg) (kg) Ultimate compressive Workability strength 400 225 None 449 184 None Water 400 184 Reducer Water 400 128 Reducer 400 184 Super Plasticizer 400 184 Air Entrainer 400 184 Accelerator DFocus
A concrete mix includes the following ingredients per cubic meter: a. Cement = 400 kg b. Water = 176 kg c. No admixture Table P6.30 shows possible changes that can be made to the mix ingredi- ents. Indicate in the appropriate boxes in the table what will happen in each case for the workability and the ultimate compressive strength as increase, decrease, or approximately the same.
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.
3. A concrete mix includes the following ingredients per cubic foot: (14 pts.) = 25 lbs. = 11 lbs. Cement Water No Admixture Table shows possible changes that can be made to the mix ingredients. Indicate in the appropriate boxes in the table what will happen in each case for the workability and the ultimate compressive strength as increase, decrease, or approximately the same. What WIlII Happen? Ultimate Compressive Strength Cement (Ib) Water (Ib) Admixture Workablity None 25 28 15 11 None Water reducer Water reducer Superplasticizer Air entrainer Accelerator 25 11 25 8. 25 11 25 11 25 11
A sieve analysis test was performed on a sample of coarse aggregate used in a concrete mix design and the resulting mass retained per sieve is shown in the table below. Sieve Size 3 in. 2 in. 1.5 in. 1 in. ¾ in. ½ in. 3/8 in. No. 4 Pan Amount Retained (lb) 0 2.2 3.7 15.9 12.0 13.5 26.7 10.1 1.3 a) What is the "maximum" size of the aggregate? b) What is the "nominal maximum" size of the aggregate? c) Complete the table below and plot the Grain Size Distribution curve on a semi-log scale. (either use the plot provided on the next page, or recreate your on using excel)
A concrete mix consists of 5 gallons of water for each bag of cement. What is the expected compressive strength of this mix based on the compressive strength curve shown here? Given information: Weight of US standard cement bag = 94 lbs Water weight = 8.34 pounds per gallon COMPRESSIVE STRENGTH psi 6000 5000 4000 3000 2000 0.3 0.4 6000 psi 5000 psi 4000 psi 3000 psi NORMAL CONCRETE 0.5 0.6 W/C RATIO 0.7 MPa 42 35 28 21 14 0.8
Q3. Three concrete mixes with the same ingredients, except the amount of mixing water, and their slump values were obtained. Three 100 mm * 200 mm concrete cylinders were prepared for each mix. The cylinders were cured for 7 days and then tested for compressive strength. The test results are as shown in the table below. Assume that the aggregate was at the saturated surface-dry condition before adding mixing water. It is required to do the following: a. Plot the relationship between slump and amount of mixing water for all mixes. Comment on the effect of increasing the amount of water on workability. b. Determine the compressive strength of each cylinder after 7 days. c. Determine the average compressive strength of each mix after 7 days. d. Using the Figure below, estimate the compressive strength after 28 days (fc) for each mix. e. Determine the w/c ratio for each mix. Plot the average fc values versus w/c ratios for all mixes. Comment on the effect of increasing the w/c ratio on the…
List the steps involved in proportioning of concrete (i.e. mix design) if the required concrete strength, durability and workability of the concrete are known? According to the durability requirement, strength class of a particular concrete and water to cement ratio, the calculated aggregate weights are given below in the table. If the calculated water requirement is 180kg, adjust the water requirement by considering water availability and water absorption of the aggregates. Calculate the final required aggregates weights after adjusting water weights. Aggregate Weight (kg) Water Water availability (%) absorption (%) (moisture content) 0/8 aggregate 1024 0.8 3.5 8/16 aggregate 420 0.5 0.8 16/24 aggregate 420 0.5 0.5
: Prepare mix design for given data • The 28-day compressive strength should be 5000 psi, The slump should 2 inch and the maximum aggregate size should not exceed one inch ( 3/4 inch). The properties of the materials are as follows: • Cement : Type I, specific gravity = 3.15 • Coarse Aggregate: Bulk specific gravity= 2.70; absorption capacity = 0.5%; dry-rodded unit weight = 1500 kg/m3, surface moisture = 1.2 % • Fine Aggregate: Bulk specific gravity= 2.80 ; absorption capacity = 1.1%; fineness modulus = 2.80; surface moisture = 3*C.No/90 %
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
Three concrete mixes with the same ingredients, except the amount of mixing water, and their slump values were obtained. Three 150 mm * 300 mm concrete cylinders were prepared for each mix. The cylinders were cured for 7 days and then tested for compressive strength. The test results are as shown. Assume that the aggregate was at the saturated surface-dry condition before adding mixing water.It is required to do the following:a. Determine the compressive strength of each cylinder after 7 days.b. Determine the average compressive strength of each mix after 7 days.c. Determine the w/c ratio for each mix.