We require a mix with a mean 28-day Required Average CompressiveStrength of 32 MPa the size of the member and the spacing of thereinforcement require a slump of 70 mm and a maximum size ofaggregate of 32 mm. Portland cement type I is used with specific gravityof 3.15, dry-rodded unit weight of coarse aggregate 1750 kg/m³ and bulkspecific gravity (SSD) of 2.55. The fineness modulus of fine aggregate is2.8 and bulk specific gravity (SSD) of 2.5 ,No air entrainment isrequired. Neglect water absorption and moisture content of bothaggregates. The aggregates conform to the ASTM C33-84 requirementsfor grading. Estimate the quantity of (cement, fine aggregate, coarseaggregate and water) for 1m³ concrete.

Solution: Choice of slump = 70 mm Choice of maximum size of aggregate = 32 mm Estimate of water…

Answered: Estimate the quantity of (cement, fine…

Engineering

Civil Engineering

Estimate the quantity of (cement, fine aggregate, coarse

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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We require a mix with a mean 28-day Required Average Compressive Strength of 35 MPa the size of the member and the spacing of the reinforcement require a slump of 50 mm and a maximum size of aggregate of 31 mm. Portland cement type I is used with specific gravity of 3.15, dry-rodded unit weight of coarse aggregate 1750 kg/m³ and bulk specific gravity (SSD) of 2.55. The fineness modulus of fine aggregate is 2.8 and bulk specific gravity (SSD) of 2.5 ,No air entrainment is required. Neglect water absorption and moisture content of both aggregates. The aggregates conform to the ASTM C33-84 requirements for grading. Estimate the quantity of (cement, fine aggregate, coarse aggregate and water) for 1m³ concrete.
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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... # # + ÷
We require a mix with a mean 28-day compressive strength of 28 MPa. The slump is selected to be 40 mm. The maximum size of aggregate is 25 mm, its bulk density is 1570 kg/m3, and its specific gravity is 2.59. The available fine aggregate has a fineness modulus of 2.60 and a specific gravity of 2.62. No air entrainment is required. The cement relative density is 3.15. 1- Design the concrete mix according to ACI method satisfying the above requirements (find water, cement, fine and coarse aggregate masses (in kg/m³) and volumes (in m³) to form 1 m³ of concrete.).
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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?
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