For a design a concrete mix which is going to be used in Muğla the 28-day compressive strength of the concrete 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 According to ACI 211 and based on absolute volumes: What should be the weight of SSD coarse aggregate in kg's? What should be the amount of mixing water in kg's? What should be the water to cement ratio? What should be the volume of dry rodded coarse aggregate per unit volume of concrete? What should be the air content in 96? What should be the SSD weight of fine aggregate in kg's? Seç... Seç... Seç... Seç... Seç Seç... # # # #

For a design a concrete mix which is going to be used in Muğla the 28-day compressive strength of the concrete 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 According to ACI 211 and based on absolute volumes: What should be the weight of SSD coarse aggregate in kg's? What should be the amount of mixing water in kg's? What should be the water to cement ratio? What should be the volume of dry rodded coarse aggregate per unit volume of concrete? What should be the air content in 96? What should be the SSD weight of fine aggregate in kg's? Seç... Seç... Seç... 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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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 1%o Previous control data yielded a standard deviation of 5 N/mm 2o CEM-I 52.5o Air-entraining is not requiredo Required slump 50 mmo Maximum cement content is 550 kg/m 3o Coarse aggregate: Uncrushed maximum size 10mmo Fine aggregate: Uncrushed with 45% passing 600 μm sieveo Relative density of aggregates: 2.7o Assume both types of aggregate as SSD. Proceed with the concrete mix design methodology and comment on any implications during thisprocess.
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 1%o Previous control data yielded a standard deviation of 5 N/mm 2o CEM-I 52.5o Air-entraining is not requiredo Required slump 50 mmo Maximum cement content is 550 kg/m 3o Coarse aggregate: Uncrushed maximum size 10mmo Fine aggregate: Uncrushed with 45% passing 600 μm sieveo Relative density of aggregates: 2.7o Assume both types of aggregate as SSD.Proceed with the concrete mix design methodology and comment on any implications during thisprocess.
A concrete mix with a 75 mm slump, w/c ratio of 0.50, and sand with a fineness modulus of 2.4 contains 1009 kg/m3of coarse aggregate. Compute the required mass of coarse aggregate per cubic meter. To adjust the mix so as to increase the compressive strength, the water–cement ratio is reduced to 0.45. Will the quantity of coarse aggregate increase, decrease, or stay the same? Explain your answer.
A concrete mix with a 75 mm slump, w/c ratio of 0.50, and sand with a fine-ness modulus of 2.4 contains 1009 kg/m3 of coarse aggregate. Compute therequired mass of coarse aggregate per cubic meter. To adjust the mix so as toincrease the compressive strength, the water–cement ratio is reduced to 0.45.Will the quantity of coarse aggregate increase, decrease, or stay the same?Explain your answer.
Consider the following example: The 28-day compressive strength should be 4,000 psi. The slump should be between 3 and 4 in. and the maximum aggregate size should not exceed 1 in. The coarse and fine aggregates in the storage bins are wet. The properties of the materials are as follows: • Cement : Type I, specific gravity = 3.15 • Coarse Aggregate: Bulk specific gravity (SSD) = 2.70; absorption capacity = 1.1%; dry-rodded unit weight : 105 lb./ft.3 surface moisture = 1% • Fine Aggregate: Bulk specific gravity (SSD) = 2.67; absorption capacity = 1.3%; fineness modulus = 2.70: surface moisture = 1.5% 5. What is the estimated batch weight of wet coarse aggregates in Ib/yd^3?
Compute for the concrete mix proportion for a 6" diameter concrete cylinder mold with 12" height and 6"x6"x21" concrete beam mold Slump = 75mm to 100mm fc' = 20.68MPa at 28 days Maximum size of Coarse Aggregates (gravel) = 3/8" Unit weight of Coarse aggregate= 1660 kg/m³ Cement Type I Specific Gravity=3.15 Specific Gravity for Coarse Aggregates=2.76 Specific Gravity for Fine Aggregate=2.60 Fineness Modulus (FM)=2.63
The moisture content of coarse aggregate is 0.60%. If the mass of the aggregate is 1,290 kg, adjust the mass of the aggregate. If the volume of sand is 0.30 cubic meter and its specific gravity is 1.50, what is the mass of the sand? If the mass of mixing water is 175 kg, and the required water-cement ratio is 0.65, how much cement powder is needed in the concrete mix? If the target slump of concrete is 160 mm, the maximum nominal size of the coarse aggregate is 37.5 mm, and the smallest nominal size is 9.5 mm, what is the estimated entrapped air in the ordinary concrete mix? The nominal maximum size of coarse aggregate is 25mm, the fineness modulus of coarse aggregates is 2.80, dry rodded mass of coarse aggregates is 1,100 kg and the fineness modulus of fine aggregates is 2.50. How much coarse aggregates is needed in the concrete mix? If the nominal maximum size of coarse aggregates is 25mm, what is the first estimate of air-entrained concrete?
Read the question carefully and give me right solution according to the question. If you don't know the solution please leave it but don't give me wrong solution. Dry weight of coarse aggregate, fine aggregate and water for 1 m3 of one type of concrete requires 1100 kg, 680 kg and 175 liters, respectively. From laboratory test for, it is determined that absorption content of coarse and fine aggregates is 0.5% and 1.25%, respectively. Meanwhile, moisture content of coarse and fine aggregate is 0.75% and 1.0%, respectively. Determine weight of coarse aggregate, fine aggregate and water for one batch with volume of mixer of 800 liter.
How many pounds of sand will you need with the following batch design of one cubic yard? The concrete will not have Air Entrainment. You are asked to develop a mix design for 1cy with the following requirements. Desired strength of 3,545psi concrete. The sp. gr. of the fine agg is given as 2.7. The fineness modulus of the fine aggregate is 2.98. The course aggregate has a sp. gr. of 2.86, a max aggregate size of 2", and a dry rodded weight of 116. The air content is to be 2% and the slump is 5 to 6 in.
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…
what is the requirement volume of fine aggregates (s.g. = 2..4) if the mass nedded for the concrete mix is 850 kg?
compute for the corrected amount of water needed in the concrete mix if the mass and fine coarse aggregates are 740 kg and 1100 kg, and both have a natural moisture content of 2% and 1.5% respectively. water/cement ratio is 0.5 and the mass of ratio of concrete is 1:2:3