Early structure formation of foam concrete mix containing modifying admixture
Cement based foam concrete of natural aging experiences high shrinkage of foam concrete mix in the formwork and shrinkage strain when drying. When managing the microstructure of the composite, namely the change (acceleration) of the microstructure formation and reinforcement of the cement stone, sig...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Peter the Great St. Petersburg Polytechnic University
2015-03-01
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| Series: | Инженерно-строительный журнал |
| Subjects: | |
| Online Access: | http://engstroy.spb.ru/eng/index_2015_02/06.html |
| _version_ | 1817989312106463232 |
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| author | A.B. Steshenko A.I. Kudyakov |
| author_facet | A.B. Steshenko A.I. Kudyakov |
| author_sort | A.B. Steshenko |
| collection | DOAJ |
| description | Cement based foam concrete of natural aging experiences high shrinkage of foam concrete mix in the formwork and shrinkage strain when drying. When managing the microstructure of the composite, namely the change (acceleration) of the microstructure formation and reinforcement of the cement stone, significant decrease can be achieved in the values of shrinkage strain.
The purpose of this research is to study the patterns of influence of the chrysotile asbestos fibers and the glyoxal crystalline on shrinkage deformations of cement based foam concrete of natural aging. The foam concrete mixture was produced by one-step technology in the laboratory mixer. Values of plastic shrinkage and plastic strength were determined during three hours after pouring the foam concrete mixture into a metal vessel.
The microstructure investigation results have shown that introduction of chrysotile asbestos fibers in an amount of 2 % and glyoxal crystalline in an amount of 0.01 % by weight of cement provides a finely porous foam concrete structure with more uniform size closed pores, which are evenly distributed over the volume. Experimental studies have demonstrated that if chrysotile asbestos fibers are introduced in an amount of 2% and the crystalline glyoxal in an amount of 0.01 % by weight of cement it leads to decrease in plastic shrinkage by 40 to 29%, shrinkage when drying by 44 and 50% and growth in plastic strength by 63 and 45% respectively. |
| first_indexed | 2024-04-14T00:45:27Z |
| format | Article |
| id | doaj.art-b77eba540b8c4b629b53a04569e0b132 |
| institution | Directory Open Access Journal |
| issn | 2071-4726 2071-0305 |
| language | English |
| last_indexed | 2024-04-14T00:45:27Z |
| publishDate | 2015-03-01 |
| publisher | Peter the Great St. Petersburg Polytechnic University |
| record_format | Article |
| series | Инженерно-строительный журнал |
| spelling | doaj.art-b77eba540b8c4b629b53a04569e0b1322022-12-22T02:22:03ZengPeter the Great St. Petersburg Polytechnic UniversityИнженерно-строительный журнал2071-47262071-03052015-03-01542566210.5862/MCE.54.6Early structure formation of foam concrete mix containing modifying admixtureA.B. Steshenko0A.I. Kudyakov1Tomsk State University of Architecture and BuildingTomsk State University of Architecture and BuildingCement based foam concrete of natural aging experiences high shrinkage of foam concrete mix in the formwork and shrinkage strain when drying. When managing the microstructure of the composite, namely the change (acceleration) of the microstructure formation and reinforcement of the cement stone, significant decrease can be achieved in the values of shrinkage strain. The purpose of this research is to study the patterns of influence of the chrysotile asbestos fibers and the glyoxal crystalline on shrinkage deformations of cement based foam concrete of natural aging. The foam concrete mixture was produced by one-step technology in the laboratory mixer. Values of plastic shrinkage and plastic strength were determined during three hours after pouring the foam concrete mixture into a metal vessel. The microstructure investigation results have shown that introduction of chrysotile asbestos fibers in an amount of 2 % and glyoxal crystalline in an amount of 0.01 % by weight of cement provides a finely porous foam concrete structure with more uniform size closed pores, which are evenly distributed over the volume. Experimental studies have demonstrated that if chrysotile asbestos fibers are introduced in an amount of 2% and the crystalline glyoxal in an amount of 0.01 % by weight of cement it leads to decrease in plastic shrinkage by 40 to 29%, shrinkage when drying by 44 and 50% and growth in plastic strength by 63 and 45% respectively.http://engstroy.spb.ru/eng/index_2015_02/06.htmlfoam concreteshrinkage strainchrysotile asbestoscrystalline glyoxalstrength |
| spellingShingle | A.B. Steshenko A.I. Kudyakov Early structure formation of foam concrete mix containing modifying admixture Инженерно-строительный журнал foam concrete shrinkage strain chrysotile asbestos crystalline glyoxal strength |
| title | Early structure formation of foam concrete mix containing modifying admixture |
| title_full | Early structure formation of foam concrete mix containing modifying admixture |
| title_fullStr | Early structure formation of foam concrete mix containing modifying admixture |
| title_full_unstemmed | Early structure formation of foam concrete mix containing modifying admixture |
| title_short | Early structure formation of foam concrete mix containing modifying admixture |
| title_sort | early structure formation of foam concrete mix containing modifying admixture |
| topic | foam concrete shrinkage strain chrysotile asbestos crystalline glyoxal strength |
| url | http://engstroy.spb.ru/eng/index_2015_02/06.html |
| work_keys_str_mv | AT absteshenko earlystructureformationoffoamconcretemixcontainingmodifyingadmixture AT aikudyakov earlystructureformationoffoamconcretemixcontainingmodifyingadmixture |