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

See similar textbooks

Similar questions

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?
Based from the proportion that you have designed, say that the concrete is mixed to fill 20 cubes (100 x 100 x 100mm) and 10 prisms (500 x 100 x 100mm), find the mass of each material based on the aggregate conditions in Table 2.
31
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.
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.
For a design a concrete mix which is going to be used in Muğla the 28-day compressive strength of the concrete is required to be 30 MPa and slump of the fresh concrete is specified as 8-10 cm. Maximum size of the aggregate is 25 mm. Other necessary data are given as: Specific gravity of cement = 3.1 Bulk specific gravity of coarse aggregate = 2.68 Bulk specific gravity of fine aggregate = 2.64 Absorption capacity of both aggregates is 1.5% Fineness modulus of fine aggregate = 2.8 Dry rodded unit weight of the coarse aggregate = 1600 kg/m³ According to ACI 211 and based on absolute volumes: What should be the weight of SSD coarse aggregate in kg's? What should be the amount of mixing water in kg's? What should be the water to cement ratio? What should be the volume of dry rodded coarse aggregate per unit volume of concrete? What should be the air content in 96? What should be the SSD weight of fine aggregate in kg's? Seç Seç... Seç Seç... # Seç + Seç... # # + ÷
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. 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.