Drop Weight Impact Test on Prepacked Aggregate Fibrous Concrete—An Experimental Study
In recent years, prepacked aggregate fibrous concrete (PAFC) is a new composite that has earned immense popularity and attracted researchers globally. The preparation procedure consists of two steps: the coarse aggregate is initially piled into a mold to create a natural skeleton and then filled wit...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-04-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/15/9/3096 |
| _version_ | 1797504075918475264 |
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| author | Gunasekaran Murali Sallal Rashid Abid Mugahed Amran Nikolai Ivanovich Vatin Roman Fediuk |
| author_facet | Gunasekaran Murali Sallal Rashid Abid Mugahed Amran Nikolai Ivanovich Vatin Roman Fediuk |
| author_sort | Gunasekaran Murali |
| collection | DOAJ |
| description | In recent years, prepacked aggregate fibrous concrete (PAFC) is a new composite that has earned immense popularity and attracted researchers globally. The preparation procedure consists of two steps: the coarse aggregate is initially piled into a mold to create a natural skeleton and then filled with flowable grout. In this instance, the skeleton was completely filled with grout and bonded into an integrated body due to cement hydration, yielding a solid concrete material. In this research, experimental tests were performed to introduce five simple alterations to the ACI 544 drop weight impact test setup, intending to decrease result dispersion. The first alteration was replacing the steel ball with a steel bar to apply a line impact instead of a single point impact. The second and third introduced line and cross notched specimens at the specimen’s top surface and the load applied through a steel plate of cross knife-like or line load types. These modifications distributed impact load over a broader area and decrease dispersion of results. The fourth and fifth were bedding with sand and coarse aggregate as an alternate to the solid base plate. One-hundred-and-eight cylindrical specimens were prepared and tested in 12 groups to evaluate the suggested alteration methods. Steel and polypropylene fibers were utilized with a dosage of 2.4% to produce PAFC. The findings indicated that the line notched specimens and sand bedding significantly decreased the coefficient of variation (COV) of the test results suggesting some alterations. Using a cross-line notched specimen and line of impact with coarse bedding also effectively reduced COV for all mixtures. |
| first_indexed | 2024-03-10T03:59:29Z |
| format | Article |
| id | doaj.art-6a63995fbcf94463b75467bfa3d4eda5 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T03:59:29Z |
| publishDate | 2022-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-6a63995fbcf94463b75467bfa3d4eda52023-11-23T08:38:09ZengMDPI AGMaterials1996-19442022-04-01159309610.3390/ma15093096Drop Weight Impact Test on Prepacked Aggregate Fibrous Concrete—An Experimental StudyGunasekaran Murali0Sallal Rashid Abid1Mugahed Amran2Nikolai Ivanovich Vatin3Roman Fediuk4Peter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, RussiaCivil Engineering Department, University of Wasit, Kut 52001, IraqDepartment of Civil Engineering, College of Engineering, Prince Sattam Bin Abdulaziz University, Alkharj 16273, Saudi ArabiaPeter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, RussiaPeter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, RussiaIn recent years, prepacked aggregate fibrous concrete (PAFC) is a new composite that has earned immense popularity and attracted researchers globally. The preparation procedure consists of two steps: the coarse aggregate is initially piled into a mold to create a natural skeleton and then filled with flowable grout. In this instance, the skeleton was completely filled with grout and bonded into an integrated body due to cement hydration, yielding a solid concrete material. In this research, experimental tests were performed to introduce five simple alterations to the ACI 544 drop weight impact test setup, intending to decrease result dispersion. The first alteration was replacing the steel ball with a steel bar to apply a line impact instead of a single point impact. The second and third introduced line and cross notched specimens at the specimen’s top surface and the load applied through a steel plate of cross knife-like or line load types. These modifications distributed impact load over a broader area and decrease dispersion of results. The fourth and fifth were bedding with sand and coarse aggregate as an alternate to the solid base plate. One-hundred-and-eight cylindrical specimens were prepared and tested in 12 groups to evaluate the suggested alteration methods. Steel and polypropylene fibers were utilized with a dosage of 2.4% to produce PAFC. The findings indicated that the line notched specimens and sand bedding significantly decreased the coefficient of variation (COV) of the test results suggesting some alterations. Using a cross-line notched specimen and line of impact with coarse bedding also effectively reduced COV for all mixtures.https://www.mdpi.com/1996-1944/15/9/3096impact loadnotched specimenbeddingresult dispersionfibersgrout |
| spellingShingle | Gunasekaran Murali Sallal Rashid Abid Mugahed Amran Nikolai Ivanovich Vatin Roman Fediuk Drop Weight Impact Test on Prepacked Aggregate Fibrous Concrete—An Experimental Study Materials impact load notched specimen bedding result dispersion fibers grout |
| title | Drop Weight Impact Test on Prepacked Aggregate Fibrous Concrete—An Experimental Study |
| title_full | Drop Weight Impact Test on Prepacked Aggregate Fibrous Concrete—An Experimental Study |
| title_fullStr | Drop Weight Impact Test on Prepacked Aggregate Fibrous Concrete—An Experimental Study |
| title_full_unstemmed | Drop Weight Impact Test on Prepacked Aggregate Fibrous Concrete—An Experimental Study |
| title_short | Drop Weight Impact Test on Prepacked Aggregate Fibrous Concrete—An Experimental Study |
| title_sort | drop weight impact test on prepacked aggregate fibrous concrete an experimental study |
| topic | impact load notched specimen bedding result dispersion fibers grout |
| url | https://www.mdpi.com/1996-1944/15/9/3096 |
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