Consider the following example: The28-day compressive strength should be4,000 psi. The slump should bebetween 3 and 4 in. and the maximumaggregate size should not exceed 1 in.The coarse and fine aggregates in thestorage bins are wet.The properties of the materials are asfollows:• Cement : Type l, specific gravity =3.15• Coarse Aggregate: Bulk specificgravity (SSD) = 2.70; absorptioncapacity = 1.1%: dry-rodded unitweight = 105 lb./ft.3 surfacemoisture = 1%• Fine Aggregate: Bulk specific gravity(SSD) = 2.67; absorption capacity =1.3%; fineness modulus = 2.70;surface moisture = 1.5%

Given:- 28 day compressive strength To find:- wet weight

28-day compressive strength shoul 4,000 psi. The slump should be between 3 and 4 in. and the maxim aggregate size should not exceed 1 The coarse and fine aggregates in t storage bins are wet. The properties of the materials are follows: • Cement : Type I, specific gravity

28-day compressive strength shoul 4,000 psi. The slump should be between 3 and 4 in. and the maxim aggregate size should not exceed 1 The coarse and fine aggregates in t storage bins are wet. The properties of the materials are follows: • Cement : Type I, specific gravity

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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a. For an aggregate sample, if you know that the apparent relative density is 2.72 and the water absorption is 1.2%. The dry mass of the aggregate is 514 gm. Find the bulk and saturated surface dry (SSD) relative density values? b. Why does the maximum size of aggregate depend on the clear spacing between bars? Show with a simple sketch. Note: Please answer both a and b... Please answer the both questions.. I don't want single b answer.. thank you
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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... # # + ÷
Design a concrete mix for construction of an elevated tank. The specified characteristic strength of concrete is 30 MPa at 28 days measured on standard cylinders. • Standard deviation can be taken as 4 MPa. • The FA and CA are used are crushed with specific gravity of 2.65 and 2.7 respectively. Fine aggregate have 38% passing a 600 m sieve. • The dry rodded bulk density of CA is 1600 kg/m3, and a slump of 50 mm is necessary. • CA is found to be absorptive to the extent of 1% and free surface moisture in sand is found to be 2%. 3 • Calculate the mix proportions for a batch of 0.080 m . ?
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Concrete is required for a column that will be moderately exposed to freezing and thawing. The cross section of the column is 300 × 300 mm. The smallest spacing between reinforcing steel is 30 mm. The specified compressive strength of concrete at 28 days is 40 MPa with a slump of 80 to 100 mm. The properties of materials are as follows: ❖ Cement used is type I Portland cement with a specific gravity of 3.15. ◆ The available coarse aggregate has a maximum size of 23 mm, a dry-rodded unit weight of 1800 kg/m3, a bulk specific gravity (SSD) of 2.7, absorption capacity of 0.55%, and moisture content (SSD) of 0.25%. The fine aggregate has a bulk specific gravity (SSD) of 2.75, absorption capacity of 1.4%, a moisture content (SSD) of 2.5%, and a fineness modulus of 2.70. The aggregates conform to the ASTM C33-84 requirements for grading.
Example 2: Design a concrete mix to implement a concrete slab (exposed to sever conditions moisture and freezing and thawing) with design compressive strength 30 MPa, a standard deviation equals to 4 and the percentage expected less than minimum strength is 10%. Sulphate Resisting Portland Cement is used. The maximum size of an angular aggregate is 20 mm with apparent density 1500 kg/m3. The available fine aggregate has fineness modulus 2.4 An air entraining agent has been used in the mix.
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) = 2.87; absorption capacity= 1.6%; dry-rodded unit weight = 121 lb./ft.3 surface moisture = 0.75% • Fine Aggregate: Bulk specific gravity (SSD) = 2.67; absorption capacity= 1.3%; fineness modulus = 2.70; surface moisture 1.12%
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?
2: What is meant by: 1. absorption, 2. Moisture content (MC). 3. Bulk density of aggregate, 4. Fineness modulus of aggregate, 5. Additions
Concrete is required for walls of a building that will be Mild Exposed to freezing and thawing. The cross section of a wall is 300 x 1500 mm. The smallest spacing between reinforcing steel is 50 mm. The specified compressive strength of Compressive strength of concrete at 28 days is 35 MPa and a slump of 55 mm. Portland cement type I is used with specific gravity of 3.12, maximum size of aggregate 27 mm and fineness modulus of fine aggregate is 2.4, absorption capacity and moisture content of fine aggregate are of 0.92%, and 1.95% respectively. The dry-rodded unit weight of coarse aggregate is 1820 kg/m³, absorption capacity and moisture content of coarse aggregate are of 0.75%, and 1.85% respectively. Both aggregates have a bulk specific gravity (SSD) of (2.45). 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.
Concrete is required for walls of a building that will be Moderately exposed to freezing and thawing. The cross section of a wall is 300 x 1500 mm. The smallest spacing between reinforcing steel is 50 mm. The specified compressive strength of concrete at 28 days is 30 MPa and a slump of 40 mm. Portland cement type I is used with specific gravity of 3.12, maximum size of aggregate 27 mm and fineness modulus of fine aggregate is 2.4, absorption capacity and moisture content of fine aggregate are of 0.92%, and 1.95% respectively. The dry-rodded unit weight of coarse aggregate is 1820 kg/m³, absorption capacity and moisture content of coarse aggregate are of 0.75%, and 1.85% respectively. Both aggregates have a bulk specific gravity (SSD) of (2.45). 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.