Refer to Appendix A for tables and equations to be used. Use the CNCI method.water requirementinlitersw:c ratio• Cement content (kg/m of concrete) =• Mat = CBD (K – 0.1 FM)You are given the following design parameters for a concrete mix:M.M.D.• Vols = 1000 -The compressive strength of the concrete mix must be 40 MPa after 28 days. The cementthat is going to be used is a CEM I 52.5 with a relative density of 3.14. The stone availableTaps vis % water30is a 19.0 mm stone with a dry compacted bulk density (CBD) of 1780 kg/m3 and a relativedensity of 2.24. An average, natural sand with a fineness modulus of 2.45 and a relative2520density of 2.86 is going to be used for the mix. The slump on site is specified as 75 mm.15The concrete is going to be compacted by moderate vibration on site.105Calculate and show the amount of water, cement, stone and sand that is needed to make101520Тарвup 1 m3 of concrete mix as specified above. APPENDIX BTable 1: w:c ratios for certain cementitious materials:Water:cement(w:c) ratioSpecifiedstrength ofmix(28 days.MPa)CEM I 32.5 MPaCEM I 42.5 MPACEM I 52.5 MPa99'00.610.720.82250.670.770.720.670.62350.530.570.50.520.62Table 2: water requirement for a concrete mix where 19.0 mm aggregate is used,and a 75 mm slump is specified:Water content I/m3Sand qualitynaturalcrusherVery poor235240poor225225average210215205poobexcellent195180195Table 3: values of K for determining stone content:Approximate slumpK.Maximum size of stone. mmcompactionrange. mm9.513.219.026.537.5Hand75 - 1500.750.840.941.05compactionModerate00'L00'L80'L1.1025 - 1000.800.801.10vibration90'L0 - 25Heavy vibration00'L1.051.15Formula's for calculating the material requirements for a concrete mix design:

As per the given information we have calculate the following things which are: amount of water…

Refer to Appendix A for tables and equations to be used. Use the CNCI method. You are given the following design parameters for a concrete mix: The compressive strength of the concrete mix must be 40 MPa after 28 days. The cement that is going to be used is a CEM I 52.5 with a relative density of 3.14. The stone available is a 19.0 mm stone with a dry compacted bulk density (CBD) of 1780 kg/m³ and a relative density of 2.24. An average, natural sand with a fineness modulus of 2.45 and a relative density of 2.86 is going to be used for the mix. The slump on site is specified as 75 mm. The concrete is going to be compacted by moderate vibration on site. Calculate and show the amount of water, cement, stone and sand that is needed to make up 1 m³ of concrete mix as specified above. • Cement content (kg/m³ of concrete) = water requirement in liters • Mat=CBD (K-0.1 FM) w:c ratio • Vol = 1000- (MMM) 30 25 20 15 10 5 0 10 15 Taps v/s % water 20 Taps 25 30

Refer to Appendix A for tables and equations to be used. Use the CNCI method. You are given the following design parameters for a concrete mix: The compressive strength of the concrete mix must be 40 MPa after 28 days. The cement that is going to be used is a CEM I 52.5 with a relative density of 3.14. The stone available is a 19.0 mm stone with a dry compacted bulk density (CBD) of 1780 kg/m³ and a relative density of 2.24. An average, natural sand with a fineness modulus of 2.45 and a relative density of 2.86 is going to be used for the mix. The slump on site is specified as 75 mm. The concrete is going to be compacted by moderate vibration on site. Calculate and show the amount of water, cement, stone and sand that is needed to make up 1 m³ of concrete mix as specified above. • Cement content (kg/m³ of concrete) = water requirement in liters • Mat=CBD (K-0.1 FM) w:c ratio • Vol = 1000- (MMM) 30 25 20 15 10 5 0 10 15 Taps v/s % water 20 Taps 25 30

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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Find the quantity of cement.
The following table represents a concrete mixture that has not been completely proportioned. The values given are the theoretical mixture proportions (oven dry basis). Material properties are also provided. Please answer the question at the end of the information given. Theoretical Mixture Proportions (oven dry basis) Water Cement Air Coarse Aggregate ASTM C 150 Type I Cement: Specific Gravity: 3.15 Coarse Aggregate: Well-graded 3/4 in. NMSA rounded gravel Oven-dry specific gravity: 2.63 Absorption: 1.10% Moisture content of stockpile: 3.10 % Oven-dry bulk density: 101.5 lb/ft³ Fine Aggregate: Natural Sand Oven-dry specific gravity: 2.60 Absorption: 3.20% Moisture content of fine stockpile: 3.50% Fineness Modulus: 2.80 265 lb/yd³ 675 lb/yd³ 6.00 % 1816 lb/yd³ What is the theoretical unit weight (in lbs/yd³) of fine aggregate in this concrete mixture (oven dry basis)? Round to the nearest whole number and do not include units when entering your answer.
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.
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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…
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.