12) Suppose that the following mix design was obtaincd at the lab before making any field adjustments for aggregate moisture content: Cement 307.4 Fly ash Water Coarse ageregate (SSD) 1019.7 Fine aggregate (SSD) 43.5 193 781.1 Further suppose that the aggregates have the following properties: (by mass Coarse ageregate Fine aggregate Absorption Capacity 0.5% 0.9% Moisture Content 03% 1135 a) Determine the moisture state of the coane and fine aggregates. (ie wet, SSD, or air dry) b) Cakulate the field mix design weights (show your caleulations): Field Cement Fly ash Water Coarse aggregate (SSD) Fine aggregate (SSD)

12) Suppose that the following mix design was obtaincd at the lab before making any field adjustments for aggregate moisture content: Cement 307.4 Fly ash Water Coarse ageregate (SSD) 1019.7 Fine aggregate (SSD) 43.5 193 781.1 Further suppose that the aggregates have the following properties: (by mass Coarse ageregate Fine aggregate Absorption Capacity 0.5% 0.9% Moisture Content 03% 1135 a) Determine the moisture state of the coane and fine aggregates. (ie wet, SSD, or air dry) b) Cakulate the field mix design weights (show your caleulations): Field Cement Fly ash Water Coarse aggregate (SSD) Fine aggregate (SSD)

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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Suppose that the following mix design was obtained at the lab before making any field adjustments for aggregate moisture content: kg/m³ Cement 307.4 | 43.5 Fly ash Water | Coarse aggregate (SSD) | 1019.7 Fine aggregate (SSD) 193 781.1 Further suppose that the aggregates have the following properties: |(by mass) Coarse aggregate Fine aggregate Absorption Capacity 0.5 % Moisture Content 0.3 % 0.9 % 1.3 % a) Determine the moisture state of the coarse and fine aggregates. (i.e. wet, SSD, or air dry) b) Calculate the field mix design weights (show your calculations): Field kg/m³ Cement Fly ash Water ? Coarse aggregate (SSD) Fine aggregate (SSD) ?
CapsL 8 A Determine the range of final gradation of selected aggregates to prepare the job mix formula for binder course of a mixing plant according to data indicated in table below? Use the following tolerances: ± 6 % for 4.75 mm and above aggregate sizes, ± 4% for 2.36 and 0.30 mm aggregate sizes, and ± 2 % for 0.075 mm aggregate size. Note: use first try with 30%, 35%, 30% and 5% for groups A, B, C and D, respectively. Sieve Size 25 19 12.5 9.5 4.75 2.36 0.3 0.075 A (30%) Coarse Aggregate 100 99 56 31 4 0 0 0 % Passing B (35%) Natural Sand 100 100 100 100 100 89 15 4.2 C (30%) Crushed Sand 100 100 100 100 92 56 9 5 D (5%) Filler 100 100 100 100 100 100 97 88 Specification 100 90-100 76-90 56-80 35-65 23-49 5 19 39 Job Mix Formula Job Mix Formula Limitation 13.6
Design a Mix for the following Data. Specified strength = (99.5) MPa, Required Slump = 80 mmMaximum size of aggregate = 25 mm, FM of fine aggregate = 2.40Grading of aggregate as satisfied by ASTM C33 (American Society for Testing and Materials)SSD specific gravity of fine and coarse aggregate = 2.75Rodded bulk density of coarse aggregate = 1600 kg/cubic mAbsorption Capacity of coarse aggregate = 0.9 %Absorption Capacity of fine aggregate = 0.5 %Moisture Content of fine and coarse aggregate = 2 %Exposure Conditions = Normal
Q1: Prepare mix design for given data • The 28-day compressive strength should be 34 MPa, The slump should be between 75 mm and 100 mm and the maximum aggregate size should not exceed 19 mm The properties of the materials are as follows: • Cement : Type I, specific gravity = 3.15 • Coarse Aggregate: Bulk specific gravity= 2.65; absorption capacity = 0.5%; dry-rodded unit weight = 1605 kg/m3, surface moisture = 1% • Fine Aggregate: Bulk specific gravity= 2.60; absorption capacity = 1.1%; fineness modulus = 2.70; surface moisture = 3%
: Prepare mix design for given data • The 28-day compressive strength should be 5000 psi, The slump should 2 inch and the maximum aggregate size should not exceed one inch ( 3/4 inch). The properties of the materials are as follows: • Cement : Type I, specific gravity = 3.15 • Coarse Aggregate: Bulk specific gravity= 2.70; absorption capacity = 0.5%; dry-rodded unit weight = 1500 kg/m3, surface moisture = 1.2 % • Fine Aggregate: Bulk specific gravity= 2.80 ; absorption capacity = 1.1%; fineness modulus = 2.80; surface moisture = 3*C.No/90 %
Concrete technolog/Sieve Analysis aggregate The sieve results of a batch of aggregate are as follows: retained on 1.5" sieve: 0.3 kg: retained on I" sieve: 1.2 kg: retained on 0.75" sieve: 7.6kg: retained on 0,5" sieve: 6.2 kg; retained on 3/8" sieve: 4.2 kg; retained on No. 4 sieve: 0.8 kg; retained on No. 8 sieve: 0.1 kg. Calculate the fineness modulis for the aggregate. Is it coarse or fine aggregate?
Three types of aggregate have sieve analysis as given below. Combine these types of aggregate to meet with specification and draw the specification limits with combined mix on semi-log chart below. Sieve No.4 No.8 No.30 No.50 No.100 No.200 Specif. Agg. A Agg. B Agg. C % % (in) (in) 100 80-100 100 100 100 80 100 100 3/8 (in) 70-90 50-70 35-50 55 100 100 15 85 100 3.2 70 100 18-29 1.1 47 100 13-23 0 30 98 8-16 0 20 93 4-10 0 10 82
For the given concrete mix design below, calculate the field weight of the ingredients in kg's if the absorption capacities of both aggregates are 1%, total moisture content of coarse aggregate is 2% and the total moisture content of fine aggregate is 4%? Ingredient Weight in kg per m³ Cement 300 Water 150 1000 800 SSD Coarse aggregate SSD Fine aggregate Fine aggregate: Seç... ÷ Coarse aggregate: Seç... Seç Water: + ÷
We require a mix with a mean 28-day Required Average Compressive Strength of 32 MPa the size of the member and the spacing of the reinforcement require a slump of 70 mm and a maximum size of aggregate of 32 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.
Q3/: TILM We require a mix with a mean 28-day compressive strength of 26.5 MPa) the size of the member and the spacing of the reinforcement require a slump of 50 mm and a 3 maximum size of aggregate of 20 mm. Portland cement type I is used with specific gravity of 3.15, dry-rodded unit weight of coarse aggregate 1700 kg/m 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.
Define the following terms:a. Saturated surface-dry condition of aggregatesb. Absorption of aggregatesc. Free water on aggregatesd. Referring to Figure 5.9, which portion of the water in the aggregate reactswith the cement in the PCC mix?
Define the following terms:a. Saturated surface-dry condition of aggregatesb. Absorption of aggregatesc. Free water on aggregatesd. Referring to Figure , which portion of the water in the aggregate reacts with the cement in the PCC mix?