CVEEN3510_Homework4- Solutions

Determine the suitability of the aggregate, with the gradation tabulated below, for use in Portland cement concrete. Review the grain size distribution to determine if it meets all of the relevant specifications for use in concrete (i.e. gradation limits, fineness modulus and % fines). Refer to the specification for concrete aggregates (Table 7 – 10) below:   Grain Size (mm) % Passing Cum %Retained 25 100   19 100   12.5 100   9.5 100   4.75 95   2.36 85   1.18 55   0.6 30   0.3 15   0.15 8   0.075 6

Determine the suitability of the aggregate, with the gradation tabulated below, for use in Portland cement concrete. Review the grain size distribution to determine if it meets all of the relevant specifications for use in concrete (i.e. gradation limits, fineness modulus and % fines). Refer to the specification for concrete aggregates (Table 7 – 10) below:   Grain Size (mm) % Passing Cum %Retained 25 100   19 100   12.5 100   9.5 100   4.75 95   2.36 85   1.18 55   0.6 30   0.3 15   0.15 8   0.075 6       Fineness Modulus - write answer to two decimal places  Percent fines - write answer to the nearest whole number  % Meets Gradation Limits? - y/n (only type lower case "y" for yes and lower case "n" for no)  Suitable for use in portland cement concrete subject to abrasion? - y/n (only type lower case "y" for yes and lower case "n" for no)

Describe in detail the relationship between an aggregate's: Shape to the workability of concrete mixes. Texture to the bond strength of concrete mixes. Size to the financial cost of concrete mixes i) ii) iii) iv) You are in charge of designing a concrete mix for use in the construction of a high-rise building. Give 1 important characteristic of the aggregate that you will choose to use for the task and elaborate on why this trait of the aggregate is important.

6. The following table shows the gradation of two aggregates A and B which are to be blended to produce an acceptable aggregate for use in manufacturing asphalt concrete for highway pavement construction. If the required limits of gradation for asphalt concrete are shown in the table below, determine a suitable ratio for blending aggregates A and B to obtain the acceptable combined aggregate. Sieve Size 3/4 in. (19 mm) 3/8 in. (9.5 mm) No. 4 (4.25 mm) No. 10 (2 mm) No. 40 (0.425 mm) No. 200 (0.075 mm) A 100 80 50 43 20 4 Percent Passing by Weight B 98 76 45 33 30 8 Required Mix 96 to 100 65 to 80 40 to 55 35 to 40 15 to 35 5 to 8

Choose one answer and write the answer number for me

Students in the materials lab performed the specific gravity and absorption test (ASTM C127) on coarse aggregate and they obtained following data: a. Dry weight = 3862.1 g b. SSD weight = 3923.4 g c. Submerged weight = 2452.1 g 1. Calculate the specific gravity values (dry bulk, SSD, and apparent) and the absorption of the coarse aggregate. (Answer in 3 decimal places)

Answer question 5.43

lease type your solutions in the box below. Answers without solutions will not have any marks.   Students in the materials lab performed the specific gravity test and bulk unit weight and voids of aggregate on a sample of coarse aggregate and obtained the following data: Mass of oven dried aggregate: 951 g Mass of aggregate submerged in water: 603 g Mass of saturated surface dry aggregate: 993 g Find: Bulk dry specific gravity of aggregate. Find the absorption of aggregate. If the dry rodded unit weight of aggregate found to be 1695 kg/m3 , calculate the percent voids between aggregate particles in this test. We blend this aggregate with other aggregate with bulk dry specific gravities of 2.23. Calculate the bulk dry specific gravity of the blend if the blend proportion is 40:60.

The grading of three aggregates is given below. a) Calculate the percent passing for a combined aggregate which is a blend of 30% (by weight) aggregate A, 45% aggregate B and 25% aggregate C. b) Determine the fineness modulus of aggregate B. c) How much percent of fine aggregate having fineness modulus of 3.00 should be mixed with sample Aggregate B to decrease its fineness modulus to 4.50? % Passing Aggregate B Sieve size Aggregate A Aggregate C Combined Aggregate 1-1/2" 100 3/4" 100 56 3/8" 60 23 # 4 100 40 #8 65 25 #16 45 12 #30 22 #50 11 #100 6. MONSTER

Answer part C and D only

is 5.10 only as specified by the instructor. Samples of coarse aggregate from a stockpile are brought to the laboratory for determination of specific gravities. The following weights are found: Mass of moist aggregate sample as brought to the laboratory: 5,298 g Mass of oven dried aggregate: 5,216 g dadeab terhib Mass of aggregates submerged in water: 3,295 g Mass of SSD (Saturated Surface Dry) Aggregate: 5,227 g 112 Find a. The aggregate bulk dry specific gravity b. The aggregate apparent specific gravity c. The moisture content of stockpile aggregate (report as a percent) d. Absorption (report as percent)

essence of determining moisture content and surface moisture of aggregates in construction. pls explain

Q; What are the harmful materials in aggregates? What are their harmful effects? Subject: Concrete Technology Department: BE-Civil Engineering

Samples of coarse aggregate from a stockpile are brought to the laboratory for determination of specific gravities. The following weights are found: Mass of moist aggregate sample as brought to the laboratory: 5,298 grams Mass of oven dried aggregate: 5,216 g Mass of aggregates submerged in water: 3,295 g Mass of SSD (Saturated Surface Dry) Aggregate: 5,227 g Find a. The aggregate bulk dry specific gravity b. The aggregate apparent specific gravity c. The moisture content of stockpile aggregate (report as a percent) d. Absorption (report as percent)

A sieve analysis test was performed on a sample of fine aggregate and produced the results in Table below. Calculate the percent passing through each sieve. What is the maximum size? What is the nominal maximum size? What is the Fineness Modulus? Plot the percent passing versus sieve size on a semi-log gradation size. (You can use Excel sheets or you can draw on a semi-log attached to page 3 of this assignment)     Sieve size (mm) Amount retained (g) Cumulative amount retained (g) Cumulative percentage retained Percent passing 12.5 0       9.5 21       4.75 104       2.36 79       1.18 78       0.6 51       0.30 78       0.15 82       0.075 39       pan 5

Define Particle Shape and Texture of Fine Aggregates.

The mass of fine aggregate B has been reduced and weighed to conduct an aggregate test shown in Table 2.  (e) Calculate the dry bulk specific gravity, SSD bulk specific gravity,  apparent specific gravity, and the aggregate absorption.

7) The grading of three aggregates is given below. a) Calculate the percent passing for a combined aggregate which is a blend of 30% (by weight) aggregate A, 45% aggregate B and 25% aggregate C. b) Determine the fineness modulus of aggregate B. c) How much percent of fine aggregate having fineness modulus of 3.00 should be mixed with sample Aggregate B to decrease its fineness modulus to 4.50? % Passing Aggregate B Sieve size Aggregate A Aggregate C Combined Aggregate 1-1/2" 100 3/4" 100 56 3/8" 60 23 #4 100 40 #8 65 25 #16 45 12 #30 22 #50 11 #100

A sieve analysis test was performed on a sample of coarse aggregate and produced the following results.  Referring to ASTM C33, what is the closest size number, and does it meet the gradation for that standard size?

Write a short note explaining why additives are required in the cement industry nowadays compared with 40 years ago.

29 - please show complete solution, thanks!

Show complete process

Elaborate/explain the  scope and significance use in ASTM c70 - standard test method for surface moisture in fine aggregates

please quickly thanks !

Question 1

A sieve analysis test was performed on a sample of coarse aggregate and produced the results in Tablea. Calculate the percent passing through each sieve.b. What is the maximum size?c. What is the nominal maximum size?d. Plot the percent passing versus sieve size on a semilog gradation chart.e. Plot the percent passing versus sieve size on a 0.45 gradation chart.f. Referring to Table (ASTM C33), what is the closest size number anddoes it meet the gradation for that standard size?

The following information is available from a specific gravity test on fine aggregate: wt of SSD sand= 509 g wt of pycnometer plus sand plus water = 2665g wt of pycnometer plus water = 2329 g wt of oven dry sand = 491 g Calculate the bulk specific gravity (SSD), bulk specific gravity, apparent specific gravity, and absorption (dry) of the material.

2. Students in the materials lab performed the specific gravity test (ASTM C127) on coarse aggregate and they obtained the following data: a. Dry weight = 3862.1 g b. SSD weight = 3923.4 g c. Submerged weight = 2452.1 g Calculate the specific gravity values (dry bulk and SSD).

Please provide complete solution for full credit and box final answer/s. PROBLEM: The following are the results in the test for specific gravity of fine aggregates:a. Mass of Oven-dry specimen in air = 502 gramsb. Mass of Pycnometer filled with water, to calibration mark = 640 gramsc. Mass of Saturated Surface-Dry Specimen = 510 gramsd. Mass of Pycnometer filled with specimen and water to calibration mark = 950 gramsCalculate the absorption, apparent specific gravity, bulk specific gravity in SSD condition, and bulk specific gravity in OD condition.

Aggregates from three sources having the properties shown in Table were blended at a ratio of 25:60:15 by weight. Determine the properties of the aggregate blend.

The mass of aggregate B has been reduced and weighed to conduct an aggregate test shown in Table 2.  (a) Calculate the: (i) dry bulk specific gravity (ii) SSD bulk specific gravity,