Structure and mineral composition of soil-cement with complex additive
The effect of the polycarboxylate ether and the complex hydrophobic-plasticizing additive on the structure, phase and mineral composition of cement based on polymineral clay with content of relict minerals more than 85 % (52.49 % of quartz) was studied. As research methods chosen X-ray diffraction p...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Peter the Great St. Petersburg Polytechnic University
2018-11-01
|
| Series: | Инженерно-строительный журнал |
| Subjects: | |
| Online Access: | https://engstroy.spbstu.ru/en/article/2018.83.4/ |
| _version_ | 1818736289920319488 |
|---|---|
| author | Pavel Bulanov Elizaveta Ermilova Lenar Mavliev |
| author_facet | Pavel Bulanov Elizaveta Ermilova Lenar Mavliev |
| author_sort | Pavel Bulanov |
| collection | DOAJ |
| description | The effect of the polycarboxylate ether and the complex hydrophobic-plasticizing additive on the structure, phase and mineral composition of cement based on polymineral clay with content of relict minerals more than 85 % (52.49 % of quartz) was studied. As research methods chosen X-ray diffraction pattern, differential scanning calorimetry and scanning electron microscopy. The regularities of the effect of the complex hydrophobic-plasticizing additive based on polycarboxylate ether and octyltriethoxysilane on the formation of cement hydration products in a strengthened clayey soil are established. Changes in structure and composition include the following: the formation of a strong skeleton of the crystallization phase due to the increase in the number of hydrated new formation in the form of low-basic hydrated calcium silicate and ettringite, decrease in portlandite content, as well as an increase in the amount of amorphous phase (up to 16 %) in the form of tobermorite gel filling intercrystalline spaces. In soil-cement hydrated silicate calcium are formed in an amount of more than 4 % and ettringite in an amount of more than 7 %, the amount of portlandite reduced by 46 %. The result of modification of the complex hydrophobic-plasticizing admixture of soil-cement, a denser and homogeneous structure with a pronounced "overgrowth" of the pores formed by gel-like hydrated calcium silicate is formed, which are deposited in a large amount on the minerals of the strengthened soil. |
| first_indexed | 2024-12-18T00:34:47Z |
| format | Article |
| id | doaj.art-01dfa9d50f8a4571890a0471721a0c6f |
| institution | Directory Open Access Journal |
| issn | 2071-0305 |
| language | English |
| last_indexed | 2024-12-18T00:34:47Z |
| publishDate | 2018-11-01 |
| publisher | Peter the Great St. Petersburg Polytechnic University |
| record_format | Article |
| series | Инженерно-строительный журнал |
| spelling | doaj.art-01dfa9d50f8a4571890a0471721a0c6f2022-12-21T21:27:02ZengPeter the Great St. Petersburg Polytechnic UniversityИнженерно-строительный журнал2071-03052018-11-01837384810.18720/MCE.83.4Structure and mineral composition of soil-cement with complex additivePavel Bulanov0Elizaveta Ermilova1Lenar Mavliev2JSC "Alekseevskdorstroy"Kazan State University of Architecture and EngineeringKazan State University of Architecture and EngineeringThe effect of the polycarboxylate ether and the complex hydrophobic-plasticizing additive on the structure, phase and mineral composition of cement based on polymineral clay with content of relict minerals more than 85 % (52.49 % of quartz) was studied. As research methods chosen X-ray diffraction pattern, differential scanning calorimetry and scanning electron microscopy. The regularities of the effect of the complex hydrophobic-plasticizing additive based on polycarboxylate ether and octyltriethoxysilane on the formation of cement hydration products in a strengthened clayey soil are established. Changes in structure and composition include the following: the formation of a strong skeleton of the crystallization phase due to the increase in the number of hydrated new formation in the form of low-basic hydrated calcium silicate and ettringite, decrease in portlandite content, as well as an increase in the amount of amorphous phase (up to 16 %) in the form of tobermorite gel filling intercrystalline spaces. In soil-cement hydrated silicate calcium are formed in an amount of more than 4 % and ettringite in an amount of more than 7 %, the amount of portlandite reduced by 46 %. The result of modification of the complex hydrophobic-plasticizing admixture of soil-cement, a denser and homogeneous structure with a pronounced "overgrowth" of the pores formed by gel-like hydrated calcium silicate is formed, which are deposited in a large amount on the minerals of the strengthened soil.https://engstroy.spbstu.ru/en/article/2018.83.4/soil-cementpolycarboxylate etheroctyltriethoxysilanex-ray diffraction patterndifferential scanning calorimetryettringitelow-basic hydrated calcium silicatestructure |
| spellingShingle | Pavel Bulanov Elizaveta Ermilova Lenar Mavliev Structure and mineral composition of soil-cement with complex additive Инженерно-строительный журнал soil-cement polycarboxylate ether octyltriethoxysilane x-ray diffraction pattern differential scanning calorimetry ettringite low-basic hydrated calcium silicate structure |
| title | Structure and mineral composition of soil-cement with complex additive |
| title_full | Structure and mineral composition of soil-cement with complex additive |
| title_fullStr | Structure and mineral composition of soil-cement with complex additive |
| title_full_unstemmed | Structure and mineral composition of soil-cement with complex additive |
| title_short | Structure and mineral composition of soil-cement with complex additive |
| title_sort | structure and mineral composition of soil cement with complex additive |
| topic | soil-cement polycarboxylate ether octyltriethoxysilane x-ray diffraction pattern differential scanning calorimetry ettringite low-basic hydrated calcium silicate structure |
| url | https://engstroy.spbstu.ru/en/article/2018.83.4/ |
| work_keys_str_mv | AT pavelbulanov structureandmineralcompositionofsoilcementwithcomplexadditive AT elizavetaermilova structureandmineralcompositionofsoilcementwithcomplexadditive AT lenarmavliev structureandmineralcompositionofsoilcementwithcomplexadditive |