The weights of ingredients for producing 1 m³ of concrete as obtained from mix design calculations is given in the below table. The temperatures of ingredients are also shown in the same table. Ingredient Cement Water kg/m³ 350 160 1250 610 Temperature (°C) 40 30 30 35 Coarse Aggregate (SSD) Fine Aggregate (SSD) If the absorption capacities of coarse and fine aggregates are 2 % and 2.5 % respectively, what is the minimum concrete temperature which can be achieved by replacing all of the mixing water with ice?

The weights of ingredients for producing 1 m³ of concrete as obtained from mix design calculations is given in the below table. The temperatures of ingredients are also shown in the same table. Ingredient Cement Water kg/m³ 350 160 1250 610 Temperature (°C) 40 30 30 35 Coarse Aggregate (SSD) Fine Aggregate (SSD) If the absorption capacities of coarse and fine aggregates are 2 % and 2.5 % respectively, what is the minimum concrete temperature which can be achieved by replacing all of the mixing water with ice?

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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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: + ÷
There are two sources of aggregates (A, B). A sample has been taken from both sources and measured their mass as shown in table below. Measurement Wet mass (9) Oven-dry mass (g) Aggregate A 500 480 Aggregate B 600 564 (a) Determine the total moisture content for the samples from both aggregate sources, respectively. (b) Determine the total moisture content for an aggregate blend with 30% of aggregate A and 70% of aggregate B.
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 Specif. Agg. A Agg. B Agg. C % (in) ½ (in) 100 80-100 100 100 100 77 100 100 3/8 (in) 70-90 57 94 100 No.4 45-65 22 81 100 No.8 No.30 33-47 18-29 2.8 1.1 66 49 100 100 No.50 13-23 0 36 98 No. 100 8-16 0 24 93 No.200 6-10 0 12 80
The weights of ingredients for producing 1 m³ of concrete as obtained from mix design calculations is given in the below table. The temperatures of ingredients are also shown in the same table. kg/m³ 350 160 Ingredient Cement Water Coarse Aggregate (SSD) Fine Aggregate (SSD) 1250 610 Temperature (°C) 40 30 30 35 If the absorption capacities of coarse and fine aggregates are 2 % and 2.5 % respectively, to which temperature water should be cooled down in order to obtain 1 m³ of 28 °C?
Samples of coarse aggregate from a stockpile are brought to the laboratory for determination of specific gravities and absorption. The following masses were obtained.Mass of moist aggregate = 3,500 gramsMass of oven-dried aggregate = 3,420 gramsMass of aggregates submerged in water = 1,800 gramsMass of SSD aggregate = 3,430 gramsDetermine;a) bulk dry specific gravityb) bulk SSD specific gravityc) apparent specific gravityd) moisture content of stockpile aggregate, in percente) absorption, in percentf) free moisture
A mix design requires 1160 kg/m3 of coarse aggregate (in dry condition), 599 kg/m3of fine aggregate (in dry condition) and 148 kg/m3 of water. The absorption capacityof the coarse aggregate is 0.4 % while the moisture content is 1.5%. The absorptioncapacity of the fine aggregate is 0.4 % while the moisture content is 4%. Pleaseanswer the following questions based on information given. a. What is the amount of Moist Coarse Aggregate? b. What is the amount of SSD Fine Aggregate? c. What is the amount of Moist Fine Aggregate? d. What is the amount of water after adjusting for moisture?
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 Specif. Agg. A Agg. B Agg. C Percent Passing % % (in) 100 100 100 100 ½ (in) 80-100 77 100 100 3/8 (in) No.4 70-90 45-65 57 22 94 81 100 100 No.8 No.30 No.50 33-47 18-29 2.8 1.1 49 100 66 100 Seive opening (mm) 13-23 0 36 98 No. 100 8-16 0 24 93 No.200 6-10 0 12 80
Sample of coarse aggregate from a stockpile are brought to the laboratory for determination of specific gravities and absorption. The following masses were obtained.Mass of moist aggregate = 5,982 gramsMass of oven-dried aggregate = 5,892 gramsMass of aggregates submerged in water = 4,082 gramsMass of SSD aggregate = 5,897 gramsDetermine;a) apparent specific gravityb) bulk dry specific gravityc) bulk SSD specific gravityd) absorption, in percente) moisture content of stockpile aggregate, in percentf) free moisture
Laboratory specific gravity and absorption tests are run on two coarse aggre- gate sizes, which have to be blended. The results are as follows: Aggregate A: Bulk specific gravity = 2.491; absorption = 0.8% Aggregate B: Bulk specific gravity = 2.773; absorption = 4.6% a. What is the specific gravity of a mixture of 60% aggregate A and 40% aggregate B by weight? b. What is the absorption of the mixture? TABLE P5.32 Aggregate A D Blend Blend 20% 15% 25% 40% Sieve Size, mm Percent Passing 37.5 100 100 100 100 25 100 100 100 100 19 95 100 100 100 12.5 89 100 100 100 9.5 50 85 100 100 4.75 10 55 100 100 2.36 2 15 88 98 1.18 2. 5 55 45 0.6 2 3 35 34 0.3 2 2 22 25 0.15 2 15 14 0.075 2 1 6 5
Laboratory specific gravity and absorption tests are run on two coarse aggre-gate sizes, which have to be blended. The results are as follows: Aggregate A: Bulk specific gravity = 2.814; absorption = 0.4,Aggregate B: Bulk specific gravity = 2.441; absorption = 5.2,a. What is the specific gravity of a mixture of 35% aggregate A and 65%aggregate B by weight?b. What is the absorption of the mixture?
SECTION A Answer ALL Questions Physical and mechanical properties of civil engineering materials, their behaviour and characteristics in design and construction works. Answer below questions using your own words and understanding. (a) (i) Design a concrete mix for the following given data: A mean 28-day compressive strength (measured on standard cubes) of 45 MPa Slump = 40 mm, Uncrushed aggregate with maximum size of 20 mm Specific gravity of aggregate = 2.64 Fine aggregate passes through the 600 µm sieve = 48% No air entrainment required, ordinary Portland cement to be used. [Use supplied charts and table to get required values]
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