CE337 Spring 24 - Sample Lab Report

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Michigan State University *

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337

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Civil Engineering

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Apr 3, 2024

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(SAMPLE LAB REPORT FOR CE 337) Relationship between Water Cement Ratio and Slump CE 337: Civil Engineering Materials Fall Semester 2020 Group and Section Number Student Name and Signature Student Name and Signature Student Name and Signature Student Name and Signature Student Name and Signature (Missing signature will be assumed as no contribution and yields 0 grade) Friday, September 20, 2019

1 ABSTRACT An experiment was conducted to determine the relationship between the water cement ratio of a Portland Cement Concrete (PCC) mix and the resulting slump. Six PCC mix designs were obtained with water cement ratios varying from 0.3 to 0.6 by weight. All other PCC mix design parameters were held constant. The ASTM C143 slump test was run on all six mixes and the results were graphed. The resulting graph provided strong evidence of a direct non-linear relationship between the water cement ratio and slump.

2 *Note: Any italic font indicates further TA explanations of lab report guidelines. Students should NOT include sections like these in their lab reports. Essentially, the abstract condenses your entire report into one paragraph. The Abstract tells the reader:  Purpose of the experiment(s)  BRIEF summary of methods used (Note how the titles of procedures were often used in place of descriptions of procedures.)  Important results An informed reader should be able to understand the experiment and its results from reading the abstract alone. Abstracts are SHORT! They should consist of no more than 150-250 words. Therefore, students must employ concise statements. Do NOT use vague language. Whenever possible include specific information.

3 GROUP ORGANIZATION Lab Participation  Bob measured concrete components  Frank mixed the six concrete mixes  Sue filled and rodded the slump cone  Jane recorded all laboratory measurements Report Participation  Bob wrote the abstract, group organization, and procedure section  Frank and Sue created the graphs and wrote the results and conclusion sections  The discussion questions were answered as a group  Jane wrote the discussion section and proofread the report  David Adams from the writing center reviewed the final report In the Group Organization section, please describe how the work was divided up and what each group member’s responsibilities were. Include the names of all proofreaders. If you took your report to the CE Writing Center, please include the name of the Writing Assistant who helped with the report. This section should be no more than one page. A list format is acceptable.

4 INTRODUCTION The ASTM C143 slump test can be used as an indicator of workability. Workability of concrete relates to how easily the concrete can be placed. Concrete mix designs often are required to meet certain specified slump values. The slump value requirements ensure the concrete can be properly poured and finished during construction. This experiment explored the effects of water cement ratio on the slump of a PCC mix design. The objectives of the experiment were as follows:  Determine whether a relationship exists between water cement ratio and slump of a PCC mix design  Obtain an equation that can be used to adjust the water cement ratio of a given PCC mix design such that the concrete produces the desired slump. This experiment is based on the ASTM C143 method of determining the slump of Portland Cement Concrete. In addition, the standard linear regression analysis procedures were applied by the Microsoft Excel to obtain the theoretical relationship between water cement ratio and slump. The introduction must do the following:  Define parameters and/or relationships you were asked to calculate and/ or develop.  Explain why the parameters are important, what they are used for, and why they pertain to civil engineering.  State the objective of the experiment(s). Treat the objective as if you are doing research for industry. What are they paying you to find out? Objectives should NOT be written as follows: “An experiment was performed to teach students about slump.”

5 METHODS AND MATERIALS Six Portland Cement Concrete (PCC) mix designs were used to explore the effects of water cement ratio on slump. These six designs were identical except for the water cement ratio. These designs can be found in Table 2 in the Appendix. Each of the designs were mixed and subjected to slump testing. The slump testing procedure requires the use of a slump cone, tamping rod, ruler, and a pan. The ASTM C143 specifications were used to determine the slump of several Portland Cement Concrete (PCC) mixtures. The ASTM procedure is summarized below: 1. Mix the concrete and dampen the mold. 2. After filling the mold in three layers, rod 25 times between each lift and remove excess concrete from top of mold 3. Lift mold off of concrete using a strictly vertical motion and measure the difference in height between the mold and concrete. As stated above, the mold must be filled in three lifts and rodded 25 times between each lift. Each lift should be approximately 1/3 the volume of the mold. During the rodding procedure, the rod should penetrate slightly into the previous lift. When removing the mold from the concrete, care should be taken to avoid lateral or torsional motions. After the mold is removed, the slump must be measured. (See Figure 1 below.) The slump is measured by placing the rod horizontally across the top of the metal mold. The vertical distance from the center of the slumping concrete to the bottom of the horizontal rod is measured using a ruler. The slump is then recorded to the nearest ¼ inch. This procedure was repeated for each of the six PCC mix designs. Figure 1: Diagram of slump measurement Slump Cone Concrete Ruler Rod

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