D concrete mix for use in reinforced cement concrete work from the following data. ) Characteristic strength at 28-days = 25 N/mm2 %3D fi) Type of cement = 43 grade ordinary Portland cement %3D fi Slump required = 30-60 mm; exposure = moderate %3D iv) 20 mm and 40 mm maximum size rounded gravel aggregate available (v) Natural sand is available as fine aggregate (vi) Specific gravity of coarse aggregate = 2.7 bopen W (vii) Specific gravity of fine aggregate = 2.65 (ViI) The fine aggregate corresponds to grading zone II (Table 1.9).

D concrete mix for use in reinforced cement concrete work from the following data. ) Characteristic strength at 28-days = 25 N/mm2 %3D fi) Type of cement = 43 grade ordinary Portland cement %3D fi Slump required = 30-60 mm; exposure = moderate %3D iv) 20 mm and 40 mm maximum size rounded gravel aggregate available (v) Natural sand is available as fine aggregate (vi) Specific gravity of coarse aggregate = 2.7 bopen W (vii) Specific gravity of fine aggregate = 2.65 (ViI) The fine aggregate corresponds to grading zone II (Table 1.9).

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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Design a concrete mix for construction of an elevated water tank. Required Slump = 3”. Maximum Size of Aggregate is 19mm. The specified design strength of concrete is 30 MPa at 28 days measured on standard cylinders. The specific gravity of FA and C.A. are 2.65 and 2.7 respectively. The dry rodded bulk density of C.A. is 1600 kg/m3, and fineness modulus of FA is 2.80. Ordinary Portland cement (Type I) will be used. S.G. = 3.15 C.A. is found to be absorptive to the extent of 1% and free surface Fill out the table below.
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Concrete is required for several structural members of a residential house. Due to the present moisture, it is expected that the concrete shall be non-aerated (Non AE) with a 28 day compressive strength of 3.000 psi for slabs and 4,000 psi for beams and columns. Due to extra moisture present in the site, the slump to be used shall be the minimum allowed by the ACI mix. Using a 3/4 inch max aggregate size, compute for the weight of cement, water coarse aggregate, and fine aggregate. Aggregate details: Cement: Type 1. Specific Gravity = 3.15 Coarse Aggregate: Bulk Specific gravity (SSD) = 2.65; absorption capacity = 4%. Dry-rodded unit weight= 100 lb/ft: surface moisture 1.2% Fine Aggregate: Bulk Specific Gravity (SSD) = 2.60: Absorption capacity = 1.5%: Fireness modulus = 2.70: Surface moisture= 496 Structural members dimmensions: Columns: 8 pes 300mm x 300mm x 3100mm (Length x Width x Height) Beam: 9 pcs. 300mm x 500mm x 4000mm (Length x Width x Height) Slab: 12000mm x 4000mm x 400mm…
Calculate the weight of cement that should be in a batch if the design mix requires concrete to have water-cement ratio of 0.45, dry gravel of 1258 kg/m3, water of 122 kg/m3 and 6% of air content. Use the following: Gravel Specific Gravity = 2.65 Moisture Content = 2.5% Absorption = 4% Sand Specific Gravity = 2.42 Moistur Content = 2.17% Absoprtion = 1.86 % Select the correct response: 253.16 kg/m3 O 122 kg/m3 395.56 kg/m3 271.11 kg/m3
PROBLEM 1 Given the following parameters, design a Concrete Mix Design ACI Method Required average strength will be 28MPa with slump of 75 to 100mm. The coarse aggregate has a nominal maximum size of 25 mm and a dry-rodded mass of 1900kg/m'. Other properties of the ingredients are: Cement Type I specific gravity 3.15 Coarse aggregate bulk specific gravity 2.75 absorption 3% Fine aggregate bulk specific gravity 2.68 absorption 1.2 % fineness modulus 3 Adjustment for Aggregate Moisture: Tests indicate total moisture of 5 percent in the coarse aggregate and 8 percent in the fine aggregate.
Please solve only Question-4 and please step by step thanks for the helping and it is not assgiment or exam queastion.
Choose the correct answer from the followings Use ACI method to design a concrete mix which is required to obtain f'c28 = 34.5MPa and a slump of 75mm . The fineness modulus of the aggregate is 3.0 , the bulk density of coarse aggregate is 1600 kg/m² and the maximum size is 25. Both the specific gravity of fine and coarse aggregate are 2.68. neglect the absorption and total moisture content . 1- The W/C ratio is * a-0.74 b-0.48 c-0.57 d-0.61 2- The cement content is * 420 kg/m3 240 kg/m3 204 kg/m3 402 kg/m3 3- The carse aggregate content is * 1140 kg/m3 1004 kg/m3 1040 kg/m3 1400 kg/m3 4- The fine aggregate content is * 807 kg/m3 780…
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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.