Structure, composition and properties of geopolymers from mineral wool waste
The waste generated during the mineral wool production makes up to 30 % of the finished product mass. These wastes can be used for producing building materials, in particular as raw materials for the production of geopolymers (alkali-activated binders). The research aim was to determine the influenc...
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| Format: | Article |
| Language: | English |
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Peter the Great St. Petersburg Polytechnic University
2019-10-01
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| Series: | Инженерно-строительный журнал |
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| Online Access: | https://engstroy.spbstu.ru/en/article/2019.90.1/ |
| _version_ | 1818339365661704192 |
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| author | Vladimir Erofeev Alexander Rodin Vladislav Yakunin Maksim Tuvin |
| author_facet | Vladimir Erofeev Alexander Rodin Vladislav Yakunin Maksim Tuvin |
| author_sort | Vladimir Erofeev |
| collection | DOAJ |
| description | The waste generated during the mineral wool production makes up to 30 % of the finished product mass. These wastes can be used for producing building materials, in particular as raw materials for the production of geopolymers (alkali-activated binders). The research aim was to determine the influence of the chemical composition of mineral wool production wastes (MWPW) on the phase composition, structure, and physico-mechanical properties of geopolymers. Five types of MWPW with various chemical compositions and specific surfaces were hydrated in the presence of NaOH (from 2 to 4 wt. %). The experimental results were obtained using the methods of X ray differential (XRD), differential thermal (DTA) and thermogravimetric (DTG) analyses. Moreover, scanning electron microscopy (SEM) and physical and mechanical tests were used. The main hydration product of MWPW in the NaOH presence is determined to be calcium hydrosilicates of the C–A–S–H fiber texture type. The largest amount of C–A–S–H was detected in geopolymer samples made of wastes with an acidity modulus between 1.4 and 1.6. The compressive strength of the obtained materials reaches 80 MPa. They are also characterized by high water resistance. The Al2O3 content in the waste should be about 10 % in order to obtain geopolymers with stable properties. The obtained results made it possible to define the correlation between the structure, composition, and physic-mechanical properties of geopolymers made of MWPW. The practical effect of the research results lies in the possibility of obtaining higher strength classes concrete. |
| first_indexed | 2024-12-13T15:25:51Z |
| format | Article |
| id | doaj.art-6bf3ef1f841847b7b53f1d8ee9aef4f7 |
| institution | Directory Open Access Journal |
| issn | 2071-0305 |
| language | English |
| last_indexed | 2024-12-13T15:25:51Z |
| publishDate | 2019-10-01 |
| publisher | Peter the Great St. Petersburg Polytechnic University |
| record_format | Article |
| series | Инженерно-строительный журнал |
| spelling | doaj.art-6bf3ef1f841847b7b53f1d8ee9aef4f72022-12-21T23:40:22ZengPeter the Great St. Petersburg Polytechnic UniversityИнженерно-строительный журнал2071-03052019-10-0190631410.18720/MCE.90.1Structure, composition and properties of geopolymers from mineral wool wasteVladimir Erofeev0https://orcid.org/0000-0001-8407-8144Alexander Rodin1https://orcid.org/0000-0002-8080-9808Vladislav Yakunin2https://orcid.org/0000-0002-8892-4085Maksim Tuvin3https://orcid.org/0000-0003-0611-2241Ogarev Mordovia State UniversityOgarev Mordovia State UniversityOgarev Mordovia State UniversityOgarev Mordovia State UniversityThe waste generated during the mineral wool production makes up to 30 % of the finished product mass. These wastes can be used for producing building materials, in particular as raw materials for the production of geopolymers (alkali-activated binders). The research aim was to determine the influence of the chemical composition of mineral wool production wastes (MWPW) on the phase composition, structure, and physico-mechanical properties of geopolymers. Five types of MWPW with various chemical compositions and specific surfaces were hydrated in the presence of NaOH (from 2 to 4 wt. %). The experimental results were obtained using the methods of X ray differential (XRD), differential thermal (DTA) and thermogravimetric (DTG) analyses. Moreover, scanning electron microscopy (SEM) and physical and mechanical tests were used. The main hydration product of MWPW in the NaOH presence is determined to be calcium hydrosilicates of the C–A–S–H fiber texture type. The largest amount of C–A–S–H was detected in geopolymer samples made of wastes with an acidity modulus between 1.4 and 1.6. The compressive strength of the obtained materials reaches 80 MPa. They are also characterized by high water resistance. The Al2O3 content in the waste should be about 10 % in order to obtain geopolymers with stable properties. The obtained results made it possible to define the correlation between the structure, composition, and physic-mechanical properties of geopolymers made of MWPW. The practical effect of the research results lies in the possibility of obtaining higher strength classes concrete.https://engstroy.spbstu.ru/en/article/2019.90.1/geopolymersslagsmineral woolmechanical propertiesx ray diffraction analysisthermoanalysismicrostructure |
| spellingShingle | Vladimir Erofeev Alexander Rodin Vladislav Yakunin Maksim Tuvin Structure, composition and properties of geopolymers from mineral wool waste Инженерно-строительный журнал geopolymers slags mineral wool mechanical properties x ray diffraction analysis thermoanalysis microstructure |
| title | Structure, composition and properties of geopolymers from mineral wool waste |
| title_full | Structure, composition and properties of geopolymers from mineral wool waste |
| title_fullStr | Structure, composition and properties of geopolymers from mineral wool waste |
| title_full_unstemmed | Structure, composition and properties of geopolymers from mineral wool waste |
| title_short | Structure, composition and properties of geopolymers from mineral wool waste |
| title_sort | structure composition and properties of geopolymers from mineral wool waste |
| topic | geopolymers slags mineral wool mechanical properties x ray diffraction analysis thermoanalysis microstructure |
| url | https://engstroy.spbstu.ru/en/article/2019.90.1/ |
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