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

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

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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Similar questions

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
Standard deviation is 3.6 MPa
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. mix? Given information: Concrete weight = 150 pcf Weight of standard cement bags = 94 lbs Water weight = 8.34 pounds per gallon Approximately how many gallons of water should be added to each cubic yard of this 20 gallons 30 gallons 40 gallons 50 gallons
It has been determined by trial mixing that a 1:1½:3 mixture (by volume) with 5 gal water per sack of cement produces a satisfactory mixture of concrete with a 2-in slump. What quantity of mixed concrete in cubic feet will a barrel of cement produce if the following is known about cement, sand and stone aggregate? Voids Unit weight,lb Cement 0.513 94 Sand 0.360 120 Stone 0.330 105 A. 16.51 ft³B. 17.25 ft³C. 17.80 ft³D. 18.35 ft³
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.
Find the quantity of cement.
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
Two batches of concrete cylinders were made with and without a calcium chloride (CaCl2) accelerator admixture. Six cylinders were made of each batch and submerged in water for different times before testing for compressive strength and the results are shown in Table P6.34. It is required to do the following: a. Using an Excel sheet, plot the relationship between curing time and compressive strength of the two mixes on the same graph. Label all axes and curves. b. Comment on the effect of the accelerator on the compressive strength of PCC at early and late ages. TABLE P6.34 Cylinder no. 1 2 3 4 5 6 Water submergence (days) Compressive strength of plain concrete (MPa) Compressive strength of concrete with accelerator (MPa) 1 3 7 14 21 28 0.8 7.8 15.8 21.1 24.5 26.8 6.2 14.8 20.1 24.0 25.9 26.8
Concrete basics.
Working on major construction project that requires considerable amounts of concrete to be used,you are asked to design a concrete mix following the BRE methodology. The concrete mixspecifications are:o Characteristic compressive strength of 50 N/mm 2 at 7 days.o Failure rate of 2%o Previous control data yielded a standard deviation of 5 N/mm 2o CEM-I 52.5o Air-entraining is not requiredo Required slump 120 mmo Coarse aggregate: Crushed maximum size 10mmo Fine aggregate: Uncrushed with 45% passing 600 μm sieveo Relative density of aggregates: 2.7o Coarse aggregate has 4% moistureo Fine aggregate is dry and has 1.2% absorption.o Volume of the required trial mix: 0.120 m3 Create the mix design and state what actions and recommenations you would do if trial produced a result with a mean compressive strength of 64 MPa at 7 days and the slump was 80mm.