For the dry rodded bulk density test of coarse aggregate as performed in lab 4, angular aggregates have more void space than rounded aggregates. ON True O B) False What are the steps of placing fresh concrete? OA) Float, Screed, Consolidate O B) Screed, Consolidate, Float OC) Consolidate, Float, Screed O D) Consolidate, Screed, Float When working with concrete in hot weather, what is an acceptable measure to help in the batching and placing of concrete? OA Spray concrete forms O B) All of the above OC Spray the aggregates OD) Add ice at the batch plant The highest concrete strength is obtained when there is a: ON Low w/c and concrete is moist cured for as long as possible O B) High w/c and concrete is moist cured for as long as possible O9 Low w/c and concrete is moist cured for 24 hours and then dried O D) High w/c and concrete is air cured for as long as possible < O O

For the dry rodded bulk density test of coarse aggregate as performed in lab 4, angular aggregates have more void space than rounded aggregates. ON True O B) False What are the steps of placing fresh concrete? OA) Float, Screed, Consolidate O B) Screed, Consolidate, Float OC) Consolidate, Float, Screed O D) Consolidate, Screed, Float When working with concrete in hot weather, what is an acceptable measure to help in the batching and placing of concrete? OA Spray concrete forms O B) All of the above OC Spray the aggregates OD) Add ice at the batch plant The highest concrete strength is obtained when there is a: ON Low w/c and concrete is moist cured for as long as possible O B) High w/c and concrete is moist cured for as long as possible O9 Low w/c and concrete is moist cured for 24 hours and then dried O D) High w/c and concrete is air cured for as long as possible < O O

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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Objective Questions : Answer the following question briefly. 1. How do you test flexural strength ? 2. How do you conduct the flexural strength of concrete ? Show a sketch. 3. What are the factors affecting flexural tests? 4. What is the importance of flexural strength in concrete? 5. What does the higher flexural modulus mean ? 6. How do you calculate the flexural strength of concrete?. 7. Why is flexure test two point loading.?
The gel space ratio of a concrete sample is given as 589. What is the theoretical strength (N/mm²) of that concrete sample?
Q1 What moisture condition should the coarse and fine aggregate be in when mixing the concrete? A Unknown B Saturated C Oven Dry D Air Dried E SSD Q2 What restriction is placed on the size of a sample of a concrete batch? A 30 L B 15 L C 20 L D 10 L E 5 L
Design a Mix for the following Data. Specified strength = (99.5) MPa, Required Slump = 80 mmMaximum size of aggregate = 25 mm, FM of fine aggregate = 2.40Grading of aggregate as satisfied by ASTM C33 (American Society for Testing and Materials)SSD specific gravity of fine and coarse aggregate = 2.75Rodded bulk density of coarse aggregate = 1600 kg/cubic mAbsorption Capacity of coarse aggregate = 0.9 %Absorption Capacity of fine aggregate = 0.5 %Moisture Content of fine and coarse aggregate = 2 %Exposure Conditions = Normal
A sieve analysis test was performed on a sample of coarse aggregate and produced the following results:A.) Calculate the fineness modulus of aggregate? Is in within the typical range?
A concrete mix design uses coarse aggregates with NMAS of 19 mm. Fineness modulus of 2.8 and DRUW of 135 lb/ft^3. What is the mass of Coarse aggregates in the mix?
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What is the weight of fine aggregates in kilograms needed for the design mix? Use three decimal places in the computation of volumes Use two decimal places for the computed weight of fine aggregates
Note:hand written solution should be avoided.
To determine the particle size distribution of fine and coarse aggregate by dry sieving.
In a ready-mix plant, cylindrical samples are prepared and tested periodically to detect any mix problem and to ensure that the compressive strength is higher than the lower specification limit. The minimum target value was set at 27.6 MPa. The compressive strength data shown in Table P7.48 were collected. Use one system of units only as specified by the instructor. a. Calculate the mean, standard deviation, and the coefficient of variation of the data.b. Using a spreadsheet program, create a control chart for these data showing the target value and the lower specification limit. Is the plant production meeting the specification requirement? If not, comment on possible reasons. Comment on the data scatter.
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