Insights for Workability
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A hard-copy version shall be also submitted at the competition as described below for display during the competition. The hard copy shall be on standard letter size paper or A4 format and bound together. Teams failing to submit the hard-copy version of the report shall receive a zero in the report section of the Final Score equation given in Section 5.
Failure to submit the electronic report prior to the competition will be considered as a withdrawal from the competition, despite the intention of the team to compete. The report must consist of the following sections: Table 2 shows the point allocation that the judges will use to score the report:. Failure to include a correct mix design sheet shall also result in disqualification Hint: Two competition categories are considered: ACI reserves the right to perform a detailed examination and check all entries for compliance with the competition rules. Due to the complexity of this task, the examination may be done after the competition.
The abstract must be no longer than words. In addition, the overall cost of the mixture should be included in the abstract. The introduction section must have a maximum of one page. The purpose of this section is to provide the reader with insight about the concrete workability and why this competition is important to the concrete industry. This section must include the following:. The procedures section is a maximum of two pages. The procedures section will provide the important details about how the mortar was or will be prepared. Maximum of 3 pages. The team will present the data obtained of flowability and stability with graphs, figures, and tables of the final mix to be used in the competition as well as prior trials that lead to the selection of the final mix.
This section must have a maximum of 3 pages. The students must discuss their approach and decision-making process to achieving the goal of this project while taking into account the constraints.
For example, did the team opt to focus on flow and then stability, or stability and then flow? Similarly, if the team decided to minimize a certain material or use a particular mixing method to optimize flow and stability this should be discussed as well as the reason for it. Include trial mixes and how they were modified in order to achieve the desired results.
The conclusion has a 1-page limit. The purpose of the conclusion is to summarize the key findings regarding what the student found to be the best approach with respect to materials, mixture proportioning, cost, etc. Download the official Mix and Cost sheet here. Egg Protection Device Competition. James Instruments Student Paper Award. Pervious Concrete Cylinder Competition. Introduction to Student Chapters.
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Join a Technical Committee. Registration is now open. Please click here to register. Objectives While current ACI competitions focus mainly on strength or hardened concrete performance, this competition will focus on workability and rheological properties of cement-based materials. Prizes Flowability, mixture stability, cost of the mixture, and quality of the written report will be used to determine the winners of the competition.
Eligibility Each team must consist of students in high school, technical school, trade school, or undergraduate students of a college or university at the time of the competition. Undergraduate students on cooperative or internship work assignment are also eligible to compete. All members of a given team must be from the same school.
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A team is limited to eight individuals. Each school may register only one team. Each team must have a supervising faculty advisor who will see that the student team complies with the rules of the competition.
Should the team determine that the workability of their mixture does not meet their expectation, the team will be allowed to adjust the quantity of 1 one chemical admixture, employed in the reported mortar mixture, relative to the mix design reported by the team. Shopbop Designer Fashion Brands. The judges will inspect both sets of raw materials and verify compliance with the rules, including the amount and gradation requirements. Data are currently being evaluated. Multiple additions of the same chemical admixture are allowed, as long as the total mixing time does not exceed the maximum of 10 ten min as specified in section 4. All material requirements indicated below should be closely followed and all materials and the mix design used in the competition are to be clearly described in the Written Report see Section 3. Failure to submit the electronic report prior to the competition will be considered as a withdrawal from the competition, despite the intention of the team to compete.
Since this competition involves mixing and pouring of mixture at the convention, it is required that at least two team members be present at the convention to participate in the mixing, pouring, and cleanup during the competition. Participation by additional team members is both permitted and encouraged, though a maximum of 4 students will be allowed to mix mortar in order to maintain a safe working area. Please note that previously for this competition there have been many teams disqualified due to non-compliance with the rules.
Please review the rules carefully, taking special note of the allowable materials and requirements for aggregate composition and water content.
Objectives
Material All material requirements indicated below should be closely followed and all materials and the mix design used in the competition are to be clearly described in the Written Report see Section 3. The mortar must use cementitious materials as binder, as defined in Section 2. If no pure Portland cement is available in the region of the competing team, a blended cement may be used, provided the amount of SCM in the cement does not exceed the limiting quantity.
Product information sheets must be included in the report. If the quantity of SCM is stated to be in a certain range, the maximum value shall be assumed for this competition. The cost of a blended cement is considered to be equal to the cost of a pure Portland cement. Blended cement shall not be used, except if no pure Portland cement is available, as discussed in 2. Nano-materials shall only be used in aqueous suspensions.
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The maximum ratio between water and cementitious materials plus mineral fillers is 0. The mix design needs to be reported in SSD conditions. The aggregate needs to be delivered at or below SSD condition at the moment of the competition. No water shall be added to correct for a moisture condition , as it is uncertain how much of the water will be absorbed by the aggregate.
The mass of aggregate min. Written Report Teams shall submit a unique written report meeting the requirements listed below for the judges to review and score. Table 2 shows the point allocation that the judges will use to score the report: All materials , except water and admixtures, are to be pre-weighed, bagged individually , and brought to the competition.
Admixtures may be measured at the competition site but must be supplied by the team.
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The competition organizer will prepare appropriate measures for water measurement on-site. The chemical admixtures can only be measured by means of a syringe provided by the team by volume on site. The judges will inspect both sets of raw materials and verify compliance with the rules, including the amount and gradation requirements. Both sets of identical raw materials shall comply with the rules see Section 8. Note that in order to ensure all raw materials arrive on time, all teams are strongly encouraged to contact their traveling companies regarding regulations of baggage and carry-on allowance, particularly liquid—that is, chemical admixture s —prior to their travels.
The judges will randomly select one set of the raw materials for mixing. Mixing If necessary, a judge will verify the water content of the sand by means of the procedure described in ASTM C If the judges deem that the aggregate is above SSD condition the sand does not slump , the team will be disqualified. Then you can start reading Kindle books on your smartphone, tablet, or computer - no Kindle device required.
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