Calculate the weight of moist gravel that should be in a batch if the design mix requires concrete to havewater-cement ratio of 0.45, dry gravel of 1258 kg/m3, water of 122 kg/m3 and 6% of air content. Use thefollowing:GravelSpecific Gravity = 2.65Moisture Content = 2.5%Absorption = 4%SandSpecific Gravity = 2.42Moistur Content = 2.17%Absoprtion = 1.86 %

Given Data:water-cement ratio =0.45dry gravel= 1258kg/m3water of 122kg/m3Air content =…

Answered: Calculate the weight of moist gravel

Engineering

Civil Engineering

Calculate the weight of moist gravel

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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Calculate the slump of fresh concrete mix if you know: 1. W/C =0.47 2. Sand = 648 Kg/m3. 3. Gravel = 1056 Kg/m?. 4. Dry rodded mass of coarse aggregate is 1650 Kg/m?.
A heavily reinforced retaining wall is to be constructed and you are asked to design a concrete mixfollowing the ACI methodology. The concrete mix specifications are:o Characteristic compressive strength of 30 N/mm 2 at 28 days.o Failure rate of 1%o Previous control data yielded a standard deviation of 2 N/mm 2o Air-entraining is required for extreme exposureo Minimum cement content 450 kg/m 3o Required slump 160 mmo Maximum aggregate size 10 mmo Fineness modulus of aggregates is 2.90o Dry rodded mass of coarse aggregates is 1650 kg/m 3o Relative density of aggregates: 2.5o Coarse aggregate has 3% moisture.o Fine aggregate has 4% moisture.o Volume of the required trial mix: 18 m 3 Following the ACI step-by-step process estimate the cement content of the mix, the total mix quantities required for this project and Using the ACI volumetric approach, provide the estimated mix quantities for the above specifications and comment on any differences between the mass approached followed in the…
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A mix design for a major sidewalk construction project is required. The concrete will not be reinforced, but will be exposed to freezing and thawing with chlorides. The trial mix strength is 32 MPa (including overdesign) with a 75 mm slump. For the sand; FM = 2.60 and its absorption is 1.2%. The coarse aggregate has a nominal maximum size of 19 mm with an absorption of 1.6% and a dry rodded density of 1720 kg/m3. Determine the mix design amounts for the concrete if the coarse aggregate contains 3% water. (keep all calculations and answers to one decimal place except where indicated. That is, round to one decimal place) Design Water = kg/m3 Water to Cement (W/CM) ratio = (two decimal places) Cement Content = kg/m3 Volume of coarse aggregate per unit volume of concrete = (two decimal places) Estimated total mass of concrete = kg/m3 Design mass of coarse aggregate = kg/m3 Actual mass of coarse aggregate = kg/m3 Actual mass of fine aggregate = kg/m3 Actual mass of water added =…
QUESTION 2 A mix design for a major sidewalk construction project is required. The concrete will not be reinforced, but will be exposed to freezing and thawing with chlorides. The trial mix strength is 32 MPa (including overdesign) with a 75 mm slump. For the sand; FM = 2.60 and its absorption is 1.2%. The coarse aggregate has a nominal maximum size of 19 mm with an absorption of 1.6% and a dry rodded density of 1720 kg/m3. Determine the mix design amounts for the concrete if the coarse aggregate contains 3% water. (keep all calculations and answers to one decimal place except where indicated. That is, round to one decimal place) Design Water = kg/m3 Water to Cement (W/CM) ratio = (two decimal places) Cement Content = kg/m3 Volume of coarse aggregate per unit volume of concrete = (two decimal places) Estimated total mass of concrete = kg/m3 Design mass of coarse aggregate = kg/m3 Actual mass of coarse aggregate = kg/m3 Actual mass of fine aggregate = kg/m3 Actual mass…
Description Concrete is required for a foundation located below ground where no substantial freezing and thawing occur. The 28-day compressive strength should be 4,000 lb./in?. The slump should be 2 in. and the maximum aggregate size should not exceed 4 in. The properties of the materials are as follows: Cement : Type I, specific gravity = 3.15 Coarse Aggregate: Bulk specific gravity (SSD) = 2.82; absorption capacity = 3%; dry-rodded unit weight = 125 lb./ft.3; surface moisture = 0%; Moisture content = %3D 3% Fine Aggregate: Bulk specific gravity (SSD) = 2.60; absorption capacity = 1.3%; fineness modulus = 2.70; surface moisture 2%; Moisture content = 3.3% %3D Box your final estimate.
3. (a) Using DOE method to design a theoretical concrete mix, needed for the construction of reinforced concrete columns in marine environment. The following materials are available for use: Ordinary Portland cement (CEM I); 20 mm maximum size crushed granite and (uncrushed) river sand as coarse and fine aggregates, respectively. Specific requirements for the concrete are as follows: Concrete grade C40; maximum water-to-cement ratio of 0.45 and minimum cement content of 360 kg/m3 (BS 8500.1:2006); and slump of 100 mm. The tests on concrete making materials gave the following results: • Specific gravity values for granite and river sand are 2.65 and 2.60, respectively; • Specific gravity of cement is 3.5; • Fine aggregate grading showed 40% passing 600 mm sieve; and • Assume 5% defective level (k = 1.64) and standard deviation based on 50 results = 3 MPa. [Ans: C = 455 kg/m3, W = 205 kg/m3, FA = 760 kg/m3, W = 930 kg/m3] (b) Redesign the concrete mix if superplasticiser is used to…