Report 2_Group 4

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.

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

Answer question 5.43

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Civil Read  properly Q- Membersof the ACI Building Code committee conducted a study, and the results showed that the scatter in the modulus of elasticity did not support the use of a different or "more precise" formulation. As a result, the equation (Eci) can be applied generally. Calculations should be based on project mixture design test results if a project calls for a more exact estimation of the modulus of elasticity. Where f 0 ci is the strength of the concrete at the moment of transfer in psi and wc is the unit weight of the concrete in pcf, which is often taken to be 160 pcf for precast concrete and 150 pcf for cast-in-place concrete.   Members with post-tension tensioning sequence affects elastic shortening in post-tensioned members. Tendons may be stressed to a maximum of 0.80 fpu, however the stress in the tendon right after seating must be 0.70 fpu or less.   Calculate the fES for elastic shortening losses.

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

A laboratory technician performing a test on fine aggregates in accordance with ASTM C128 weighed the pycnometer filled with water reading 1201.8 g on the scale. He then took 502.3 g sample in saturated surface dry condition and poured into the pycnometer partially filled with water then filled it up to the calibrated mark. The weight of the pycnometer containing water and sample is 1516.1 g. After which he poured the content of the pycnometer in a drying pan and dried the sample in the oven. The resulting weight of the sample after drying was 494.9 g. Compute the following: a. Bulk Specific Gravity (oven dry) b. Bulk Specific Gravity (SSD) c. Apparent Specific Gravity d. Absorption in %

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)

Sieve Analysis of Coarse Aggregates) Another group of students have gathered data for sieve analysis for another aggregate stockpile. Determine the percentages passing of each size and draw the grain size curve. Sieve Size Amount retained, g 1-1/2" 1" 315 782 3/8" No. 4 No. 30 No. 200 1493 677 1046 1502 Pan 45

Write water absorption of Aggregate: 1-Introduction. 2-Procedure. 3- discussion .

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If needed assume the unit weight of water to be 62.4 lb/ft3 a) A HMAC sample has the following volumetric properties (i) VMA = 0.1865 ft3and (ii)Volume of air = 0.0452 ft3 Compute %VFA.  b) A HMAC sample has 140 lbs of aggregate with a bulk specific gravity of 2.65 and aneffective specific gravity of 2.71. Based on this information the volume of the absorbedasphalt is ________________ft3A compacted sample of hot mix asphalt concrete sample has a unit weight of 135 lb/ft3.c) The sample has an asphalt content of 5% (by weight). Assume no absorbed asphalt.The bulk specific gravity of the aggregate is 2.65, and specific gravity for the asphaltcement is 1.05. Based on this information compute VMA for this mixture.

Write introduction Part B:The lab investigation undertaken as part of this module is designed to help you• further understand the basic concept of the fracture properties ofconcrete;• understand the procedure of testing the fracture properties of concrete;• strengthen the ability to design concrete mixes;• develop the ability to numerically calculate the fracture energy of concrete;• develop the ability to analyze test results and make objective judgements.1. TEST SPECIMENSNotched concrete beams are adopted for this lab activity, as shown in the figurebelow, with typical dimensions as follows:Length of the beam L = 500 mmBreadth of the beam B = 100 mmDepth of the beam H = 100 mmDepth of the notch a = 50 mmDepth of the ligament h - a = 50 mmEffective span l = 400 mmHl BFigure 1: Schematic representation of a beam under three-point bending2. MATERIALS FOR MAKING CONCRETEOne concrete grade was used for this laboratory investigation, C50 (50 MPa) at28 days after standard water curing, with…

2. A sample of fine aggregate weighs 501.2 g when SSD and 491.6 g when OD. The flask weighs 540.6 g when filled with water and 843.1 g when filled with the aggregate sample and water. Calculate the bulk specific gravity, apparent specific gravity and percent absorption.

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Using online resources, find the aggregate specifications for the state of California and identify the limitations for deleterious materials in aggregates used for asphalt concrete

What is the discussion about the specific gravity experiment of concrete (gravel) aggregates?

5.10 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 5.11 5.12 5.13 5.14 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) Base course aggregate has a target dry density of 1917 kg/m³ in place. It will be laid down and compacted in a rectangular street repair area of 600 m × 15 m × 0.15 m. The aggregate in the stockpile contains 3.1% moisture. If the required compaction is 95% of the target, how many tons of aggregate will be needed? Calculate the percent voids between aggregate particles that have been com- pacted by rodding, if the…

Fly ash, which is among the mineral additives and used as a concrete additive;• Its use in dam concretes,• Its use in concrete design in hot and cold weather conditions,• Effects on the strength and durability of concrete,• Write your comments by evaluating the effects on the workability of concrete.Your opinion about these hennas is very important.

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?

Specific Gravity and Absorption of Coarse Aggregates    What are the possible discussion of observations for specific gravity and absorption of aggregate to observed values?

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5. Calculate the solid volume and percent of voids of an aggregate that weighs 111.2 pcf and has a specific gravity of 2.62.

(c) Table 1 shows the mass of fine aggregates used to conduct a specific gravity test. Calculate the; i) Dry bulk specific gravity ii) SSD bulk specific gravity i) Apparent specific gravity iv) Aggregate absorption. Table 1 Mass of Aggregate 600 g SSD Mass of Aggregate 589 g Mass of pycnometer with water 710 g Mass of pycnometer with water and aggregate 1090 g Mass of aggregate at cool temperature 498 g