Assignment 3 practical and/or data analysis for remote students | ENGR20003 – Semester 2 – 2020 Introduction The assignment 3 has two parts – one practical experiment that you should perform at home with the received kit – two a data analyses part It is very important that you read the following assignment, have watched the Online Remote Practical Work Induction videos, read the FAQ and successfully answered to the online pre-lab quiz and the Melbourne School of Engineering quiz before performing Part A. At the end of Part A you have to complete a form and enter your experimental data. We will share and updated the data spreadsheet every other day with all the collected data, and you will have to interpret the results of all the class’ students. Part B is focussed on the interpretation of data obtained in the past by students. Depending to your student number you will have to interpret different set of data, please see Part B for further details. Part A – Practical experiment Part A is the practical experiment you are to perform if you’ve received the kit sent by the University via mail. In part A you will perform a mini slump test with mortar. Slump Test on concrete Assignment 3 practical and/or data analysis for remote students ENGR20003 | 6% weighing of the total score Assignment 3 Individual assignment Online submission 8% weighing Due at Midnight 22/10/2020 — Engineering Materials Assignment 3 Assignment 3 practical and/or data analysis for remote students| ENGR20003 – Semester 2 – 2021 If you are living in Australia and you haven’t received your kit by the 5th of October please contact Madhu or Rackel. If by the 15th of October you still haven’t received anything then you will complete only the analytic part of the Part A as well as Part B. You have to clearly state on your report that you have been very unlucky to not receive your kit and you will then do only the analytic part. You won’t be penalised if you haven’t received your kit, we will use another marking scheme. If you are overseas and you haven’t received your kit by the 5th of October, please let us know we have tracking numbers to locate your parcels. Before starting to do anything you have to o Read the assignment part A o Watch the lecture and the videos going through the whole practical process o Read the Melbourne School of Engineering safety rules to perform a remote practical work and be successful at more than 80% at the MSE test (the links are available on the assignment page the module and in the announcement email) o You have to success (>80%) the online quiz starting available on the quiz subset on canvas o Please proceed to the take 5 section below before performing the experiment full fil the form sign it and add a copy to your assignment report o Please set up all you working area before starting, the best would be to have a clear flat space of 1-meter square. The practical experiment will take you around 40 minutes SAFETY RULES Non-compliance with regulations may result in the immediate exclusion of the student halls of Hands. General rules You should not open the kit before seen the online videos and completing the online quiz. It is a University requirement that student dress and behaviour must conform to the following safety standards: 1. Long sleeve and Long leg clothing are compulsory (or wear Lab coats) 3. Footwear must completely cover feet 4. No smoking, drinking, or eating while performing the experiment. 5. the experiment is to be performed standing up 6. send Rackel or Madhu an email if you have any queries or use the discussion board 7. Keep table/work area tidy before performing the experiment and after 8. Handle chemicals (cement) and equipment with care Assignment 3 practical and/or data analysis for remote students| ENGR20003 – Semester 2 – 2021 9. Follow online instruction in case of drops of the mortar on a non-protected surface 10. Ask question if you are unsure before starting the experiment, you only have 1 kit unfortunately so you only have 1 go. Quality: Follow the instructions contained in the following Protocol. o Be sure the working area is clean after handling running water washing no soap is the best cleaning way o Throw in the plastic bag provided the contaminated material and tools (spoon tube bag. Plastic sheet) o Follow the protocols proposed Assignment 3 practical and/or data analysis for remote students| ENGR20003 – Semester 2 – 2021 Take 5 A word version is available on the Assignment 3 subset for you to download fill up and sign, take a picture of or scan and to be add to your assignment 3 report. Student Name: Date: Student Number: Subject Code:ENGR20003 Signature: Procedures: Yes No N/A I have read the notes / guidance for this practical I have read the MSE safety FAQ and completed the online quiz and had 80% or more I have watched the video explaining what I need to do on the assignment’s page I have completed the online pre-lab quiz and had 80% or more If no, please send an email to Rackel or Madhu before commencing any practical work. Personal Protective Equipment: Yes No N/A Am I wearing the required PPE for the task Gloves (mandatory for tasks that involve the use of a soldering iron) Closed-toe shoes (mandatory for all practical works) Long sleeves (mandatory for all practical works) Long pants(mandatory for all practical works) Mask (mandatory when handling dry powders) Safety glasses (mandatory for all practical works) Equipment – before using any equipment, you must complete the following safety checks: Yes No N/A Bags is in good condition, no holes no link Gloves, mask and glasses in good condition Spoon, plastic sheet, tub in good condition Contact your Madhu or Rackel via email if you answered no to any of the above questions. Hazard Identification – before commencing my practical work, you must review my workplace: Yes No N/A Burns due to drop of mortar not straightaway washed with water Exposure to dust due to poor handling of dry powder, poor ventilation and not wearing mask Cuts due to the usage of a cutting tool for the cylinder Chemicals, such as cement The area around my work zone is free from clutter and trip hazard Chemical such as mortar fresh I am working standing Risk Control – all hazards identified above must have a suitable control: 1. 2. 3. 4. 5. 6. Yes No N/A All controls listed above are in place Risks have been minimised to an acceptable level Assignment 3 practical and/or data analysis for remote students| ENGR20003 – Semester 2 – 2021 Kit received Step by step experimental homework Table 1: Mortar mix to make Cement (g) Water (g) Sand (g) Your mortar formulation 50 30 100 Note: Wear gloves to protect hands as cement is corrosive, and wear a dust mask when mixing dry materials Step 1: Prepare your working area, clean and free of food. Step 2: Check list the equipment required: 1. Scissors 2. Tape 3. Ruler 4. Received kit containing the following: a. Bag of cement and sand b. Plastic spoon c. Plastic sheet d. Plastic bag e. Plastic tub to measure water f. Gloves g. Face Mask h. Chux i. Safety glasses Assignment 3 practical and/or data analysis for remote students| ENGR20003 – Semester 2 – 2021 Step 3: Cut a rectangle out of the plastic sheet provided (50 mm high and 160 mm length) as on the picture on the right Step 4: Tape with sticky tape the mould on itself to make a cylinder make sure the tape holds the cylinder properly. Step 5: place the cylinder on the remaining plastic sheet Step 6: wet lightly the chux and humidify the surface of the plastic sheet as well as the inside of the cylinder Step 7: put your mask and gloves on Step 8: use the scissors to open the bag Step 9: leave the bag safely open on you table and measure 30ml of water that you put on the dry cement and sand. You should use the plastic tube to measure accurately 30ml of water. Step 10: mix the cement sand and water with the plastic spoon in the bag Step 11: perform the slump: 1. Hold the cylinder down on the plastic sheet and poor approximately half of the mortar from the bag 2. Tap 25 times your mortar using the other side of the spoon 3. Pour all the mortar left in the mixing bag, use the spoon if needed the cylinder shouldn’t move to much now 4. Tap 25 times again 5. Remove the cylinder slowly, steady and up right 6. Measure the slump (the slump is the different in high between where was the material in the cylinder when full and the top of the cylinder after removing the plastic cylinder). Assignment 3 practical and/or data analysis for remote students| ENGR20003 – Semester 2 – 2021 7. Measure the spread (measure the diameter of the cylinder after removing the cylinder from the top, measure at least 2 diameters in 2 different directions) 8. Record your slump and spread value on a piece of paper Step 12: Dispose of everything in the plastic bag provided and clean with a damped chux your working area Step 13: Finish cleaning with a dry paper making sure there is no remaining of the mortar anywhere. Step 14: Complete the online form with your average values of slump and spread Use the link below also available on the assignment 3 page and the module. this is the end of your experimental work Report on part A In you report you have to describe the experiment that you have performed including pictures/videos if possible. Please follow the below guidelines for the section A of your report. Your report on Part A should include: o The objectives of practical homework o The procedure followed during the practical homework o Your own measurement results in a table form; o Graphs plotting the data from all the students with the calculation of the standard deviation and a small comment on the data and the dispersion. The data of all students will be available on an excel spreadsheet that will be updated every other day with the new data o Small conclusions. Assignment 3 practical and/or data analysis for remote students| ENGR20003 – Semester 2 – 2021 Part B – Practical experiment data analyse Part B is focussed on the analyses of previous data obtained by students over previous years in the lab. You have access to these data on the assignment 3 Canvas page. We described below the experiment perform on the different formulations of concretes and mortars. This section aims to highlight the correlation between composition, process and properties of the materials. Following tables indicate mix designs for mortar for which samples have been casted and tested by students undertaking ENGR20003 at the Francis lab, University of Melbourne this year or in previous years. Table 2: Mix Designs for Mortar Samples Mix ID Cement Fly ash (g) Water Accelerator Water reducer Sand (g) g) (g) (g) (g) a 450 0 225 0 0 1237.5 b 450 0 270 0 0 1237.5 c 450 0 180 0 0 1237.5 d 450 0 180 0 1.13 1237.5 e 450 0 180 0 2.25 1237.5 f 250 250 125 0 2.5 1237.5 g 250 250 125 10 2.5 1237.5 h 500 0 125 0 2.5 1237.5 Mortar formulations were tested for the following properties. Fresh state properties→ Slump Hard state properties → Compressive strength Based on your student number, please select the appropriate spreadsheet which you need to analyse from the following table. Table 4: which data you have to analyse for part B Last Digit of your Student ID Spreadsheet 0,1,4,5 Mortar-1 2,6,7 Mortar-2 3,8,9 Mortar-3 Assignment 3 practical and/or data analysis for remote students| ENGR20003 – Semester 2 – 2021 The spreadsheets include Mortar formulations, fresh state properties and hard state properties. Sample preparations were carried out in several batches by different groups of students, even for the same formulation. Therefore, you may find different slump values corresponding to the same mortar formulation. The casted mortars were then tested for compressive strength at different ages (7, 14, 21 and 28 days after casting) as indicated in the spreadsheets. Based on the data, the following points need to be analysed. Part B.1: Analysis of the Fresh State Properties Based on the available slump test data, comment on the effects of superplasticiser and the water content on the workability of the mix. You need to correlate the formulation to the slump test results and explain why this behaviour has occurred. When it’s possible, for each formulation, discuss and draw curves of the slump versus water content. Part B.2: Analysis of Hard State Properties Formulations should be correlated to the compressive strength results. Explanations on why this behaviour has occurred need to be provided. You may consider: o Compressive strength versus time for all formulations o Compressive strength vs w/c o Effects of introducing fly ash to the mix When it’s possible, for each maturity, draw and discuss the strengths depending on the formulation (quantity of water, fly ash content etc…) Note: Please note that results should be plotted, and the corresponding trends need to be interpreted in a clear manner. These results have been obtained for samples prepared and tested by students. Please note that due to experimental errors, some results may not be agreeable. Therefore, you have the choice of extracting the suitable data from the given data set and disregard any outliers in order to perform a meaningful analysis. You may average the data to produce the plots. The corresponding statistical parameters (error, standard deviation etc) need to be clearly stated. Interpretations and comments from students will mainly be considered in the marking process. Final output for assignment 3 Final report: o It is due in 22nd of October 2021, submission Online via LMS at midnight o If you haven’t received the kit by the 15st of October, you can state clearly on the report that you haven’t received the kit on time and your report won’t include the part related to the experimental homework. You will still be able to complete the analyse of the results from part A and part B of the assignment o All the results obtained on part A are to be logged by completing the online form at the following link Assignment 3 practical and/or data analysis for remote students| ENGR20003 – Semester 2 – 2021 o An excel spreadsheet with all the data will be shared and updated regularly for you to work on the whole class data. This spreadsheet will be on the assignment 3’s page and on the assignment 3’s module o On part B use table 4 to know which data you have to work on. o A detailed presentation of the practical homework performed is needed, o Results must be plotted and accompanied by an interpretation of the trends. o The marks will mainly consider the interpretations and comments from students. o The final report will necessarily follow the following plan: – Introduction – Part A: Presentation of the practical homework performed Presentation of your results Presentation of all the class results and small discussion of the results and dispersion – Part B Presentation of results obtained, Explanations of trends Discussion around the dispersion of the data obtained – Conclusion Extra tips for part B o You need to comment the workability of the different mixes, (effect of fly ash content, effect of water, effect of the accelerator) o You need to correlate the formulation parameters to the results obtained with the slump and explain why you have certain trend/behaviour o When it’s possible, for each formulation, discuss and draw curves of the slump versus water content) o You need to correlate the formulation to the results obtained in density (fresh and hard) and compression and explain why you have this behaviour. (example: compressive strength versus time for all formulations, compressive strength vs w/c…) o When it’s possible, for each formulation, discuss and draw curves of strength versus time. o When it’s possible, for each maturity, draw and discuss the strengths depending on the formulation END OF ASSIGNMENT 3
