Find the quantities of cement, fineaggregates (FA) and coarse aggregates(CA) for 1 m³ of concrete.The void ratio in cement is 60%, in FA is 40%and in CA is 44%.Take Materials properties as:Mix is 1:2:4 with water-cement ratio of 0.59. Onebag of cement weighs 50 kg (neglecting the emptyweight of bag) and density of cement is 1440kg/m³. Density of FA is 1780 kg/m³ and coarseaggregate (CA) is 1650 kg/m³. Volume of one bagof cement is 34.7 litres. Assume volume of air inconcrete as 3% per m³ of concrete.

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Answered: Find the quantities of cement, fine…

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 concrete mix has a ratio os 1:2:4 by mass. The properties of thematerials to be used are tabulated below.MATERIALS. SPECIFIC GRAVITYCEMENT 3.33SAND 2.65GRAVEL 2.67Cement weighs 40 kg per bag. Use 24 liters of water per bag of cement Compute the volume of cement solids per bag of cement in cu m.Compute for the required volume of sand solids per bag of cement.Compute for the volume of concrete that can be produced per bag of cement 0.1
A concrete mix includes the following ingredients per cubic meter: a. Cement = 400 kg b. Water = 176 kg c. No admixture Table P6.30 shows possible changes that can be made to the mix ingredi- ents. Indicate in the appropriate boxes in the table what will happen in each case for the workability and the ultimate compressive strength as increase, decrease, or approximately the same.
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.
The following mix design information is provided to you for 1 m³ concrete. • Air content = 5% • w/cm = 0.7 • cement Gsb = 3.000 • water = 158 kg, density = 1000 kg/m³ • Coarse aggregate (CA) with Gsb = 2.695 and fine aggregate (FA) with Gsb = 2.690 What is the total volume of aggregates (CA + FA) in the mix (in m³)?
In designing a concrete mix, if the amount of mixing water is estimated at W = 185 Kg/m, the SSD weight of the coarse aggregate is 1045 Kg/m, and the SSD weight of the fine aggregate is 617 Kg/m. The coarse aggregate has a moisture content of 1% and an absorption capacity of 2%. The fine aggregate has a moisture content of 2% and an absorption capacity of 5%. The adjusted weight of mixing water (in Kg/m³) is: O 177 O 214 156 193 O 172 O O O O O
Concrete is required for a column that will be Severe 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 Required Average Compressive Strength of concrete at 28 days is 35 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.
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 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 also the table.
ASAP
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.
A concrete mix required for construction of an industrial building. Cement is PKC32,5. Specific gravity of cement is 31.5 kg/dm3. Vibrator will be used during the placement of concrete. The grading analysis of bulk aggregate as follows. Specific gravities and bulk density of aggregates as follows: :2.60 kg/dm3 Coarse Aggregate :2.65 kg/dm³ :2.72 kg/dm 1.30 kg/dm3 1.70 kg/dm3 1.55 kg/dm3 Sand Pebble Target strength has been desired as 20 + 5 = 25 MPa Workability of the resulting concrete will be Plastic Minimum amount cement will be 350 kg/m³ Grading of the bulk aggregate at the site: Sieve size (mm) 16 8 4 1 0.5 0.25 Cumulative Passing (%) 100 64.8 48.7 32.8 24.0 12.0 4,5 Design a concrete mix which is already solved by using Eprical Formulas according to ACI and TS and compate the results,
The cement content of a concrete is 375 kg/m3 and the w/c ratio is 0.46. At a specific moment of the cement hydration, the degree of hydration is 0.80. Calculate the volume (dm/m³) of the following: (i) chemically bound water, (ii) gel water and (iii) capillary water A concrete sample was extracted from a structure and dried at 105 °C in which 80 kg/m3 of water evaporated. The degree of hydration (a) was determined to be 0.5. The mix design of the concrete was 1:6.0:0.6 (Cement:Aggregates:Water mix ratio by weight) and the target air content was 3 %. a) How much of the water had been evaporated prior to drying at 105°C? b) What were the volume of (i) un-hydrated cement, (ii) solid part of cement gel, (iii) gel water, (iv) contraction pores, and (v) capillary pores at the time of sampling?

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