For a design a concrete which will be exposed to seawater and sulfates in a structure that comprises thin members, the 28-day compressive strength 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 What should be the weight of dry weight of coarse aggregate in kg's? What should be the weight of fine aggregate in kg's? What should be the water to cement ratio? Seç... Seç... Seç... #

For a design a concrete which will be exposed to seawater and sulfates in a structure that comprises thin members, the 28-day compressive strength 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 What should be the weight of dry weight of coarse aggregate in kg's? What should be the weight of fine aggregate in kg's? What should be the water to cement ratio? Seç... Seç... Seç... #

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

20 - Which of the following does not occur if the material under 63 micron exceeds 4% in the aggregate.A) The need for water increases.B) Workability increases.C) No problem occurs.D) Strength decreases.E) The need for cement increases.
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
Use ACI method .
31
The strength of cement is determined by a number of factors.
The fineness modulus of fine aggregate is 2.78 and of coarse aggregate is 7.82 and the desired fineness modulus of mixed aggregate is 6.14. What is the amount of fine aggregate to be mixed with one part of coarse aggregate?
If I have a coarse aggregate that is low fine modulus range of coarse aggregate, what will happen to the mix and what will happen to the structure as time passes?
What are the effects the unsoundness of aggregate on concrete? The physical causes of large or permanent volume changes of aggregate are------ Why the bulking of sand is affected in the case of volume batching? Why should not the shale, coal, mica and iron pyrites present in aggregate? Why should not the clay and fine materials present in excessive quantities in The bulking of sand depends on ---. and ------ aggregate? ( 2 reasons) Define the soundness of aggregate -and Define alkali-silica reaction What are the effects of alkali-silica reaction on hydrated cement paste? The rate of alkali-aggregate reaction depends upon-- -and ---- How to get rid of reactive silica Aggregate? Define sieve analysis • Why should the aggregate sample has to be air-dried before the sieve analysis is performed? Define fineness modulus of sand • What are the usefulness of determination of fineness modulus of aggregate? • What are the main factors governing the desired aggregate grading? • What are the…
An aluminum pipe is filled in polymer concrete is subjected to a pure compressive force as shown in the figure below. Determine the factor of safety against compressive stress acting on the column. The pipe has an outer diameter of 60 mm and inner diameter of 50 mm. The aluminum and the polymer concrete have the following material properties: Young's modulus: Eal = 70 GPa (aluminum). Ecr = 10 GPa (polymer concrete). Yield compressive strength: Sy-al = 150 MPa (aluminum), Sy-cr= 80 MPa (polymer concrete). 100 kN 500 mm Select one O FS = 6.4 FS= 1.3 o FS =1.1 O FS =1.7 OFS=50
Is it correct to say that the fineness modulus of aggregate B is 0.44 asumming aggregate B is a fine aggregate and also that the percent passing the 1.18mm, No. 16 sieve is 56%?
Use ACI method.
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.