Mechanical Properties and Microstructure of Geopolymer-Based PFSS Synthesized from Excavated Loess
Pre-mixed fluidized solidified soil (PFSS) has the advantages of pumpability, convenient construction, and a short setting time. This paper took the excavated loess in Fuzhou as the research object and used cement-fly-ash-ground granulated blast furnace slag-carbide slag as a composite geopolymer sy...
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| description | Pre-mixed fluidized solidified soil (PFSS) has the advantages of pumpability, convenient construction, and a short setting time. This paper took the excavated loess in Fuzhou as the research object and used cement-fly-ash-ground granulated blast furnace slag-carbide slag as a composite geopolymer system (CFGC) to synthesize PFSS. This study investigated the fluidity and mechanical strength of PFSS under different water-solid ratios and curing agent dosages; finally, the microstructure of the composite geopolymer system-pre-mixed fluidized solidified soil (CFGC-PFSS) was characterized. The results showed that when the water-solid ratio of PFSS increased from 0.46 to 0.54, the fluidity increased by 77 mm, and the flexural strength and compressive strength at 28 d decreased to 450.8 kPa and 1236.5 kPa. When the curing agent dosage increased from 15% to 25%, the fluidity increased by 18.0 mm, and the flexural strength and compressive strength at 28 d increased by 1.7 times and 1.6 times. A large number of needle-like AFt, C-S-H gel, and C-(A)-S-H gel coagulate with soil particles to form a three-dimensional reticular structure, which is the mechanism of the strength formation of PFSS under the action of CFGC. |
| doi_str_mv | 10.3390/ma18010030 |
| format | Article |
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This paper took the excavated loess in Fuzhou as the research object and used cement-fly-ash-ground granulated blast furnace slag-carbide slag as a composite geopolymer system (CFGC) to synthesize PFSS. This study investigated the fluidity and mechanical strength of PFSS under different water-solid ratios and curing agent dosages; finally, the microstructure of the composite geopolymer system-pre-mixed fluidized solidified soil (CFGC-PFSS) was characterized. The results showed that when the water-solid ratio of PFSS increased from 0.46 to 0.54, the fluidity increased by 77 mm, and the flexural strength and compressive strength at 28 d decreased to 450.8 kPa and 1236.5 kPa. When the curing agent dosage increased from 15% to 25%, the fluidity increased by 18.0 mm, and the flexural strength and compressive strength at 28 d increased by 1.7 times and 1.6 times. A large number of needle-like AFt, C-S-H gel, and C-(A)-S-H gel coagulate with soil particles to form a three-dimensional reticular structure, which is the mechanism of the strength formation of PFSS under the action of CFGC.</description><identifier>ISSN: 1996-1944</identifier><identifier>EISSN: 1996-1944</identifier><identifier>DOI: 10.3390/ma18010030</identifier><identifier>PMID: 39795674</identifier><language>eng</language><publisher>Switzerland: MDPI AG</publisher><subject>Alkalinity ; Calcium silicate hydrate ; Cement ; Cemented carbides ; Compressive strength ; Curing ; Curing agents ; Dosage ; Flexural strength ; Fluidizing ; Fourier transforms ; Geopolymers ; GGBS ; Hydration ; Industrial wastes ; Loess ; Mechanical properties ; Microstructure ; Raw materials ; Scanning electron microscopy ; Slag ; Soil mechanics ; Soil properties ; Soil strength ; Soil structure ; Solidification ; Solids ; Synthesis ; Water</subject><ispartof>Materials, 2024-12, Vol.18 (1), p.30</ispartof><rights>2024 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). 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This paper took the excavated loess in Fuzhou as the research object and used cement-fly-ash-ground granulated blast furnace slag-carbide slag as a composite geopolymer system (CFGC) to synthesize PFSS. This study investigated the fluidity and mechanical strength of PFSS under different water-solid ratios and curing agent dosages; finally, the microstructure of the composite geopolymer system-pre-mixed fluidized solidified soil (CFGC-PFSS) was characterized. The results showed that when the water-solid ratio of PFSS increased from 0.46 to 0.54, the fluidity increased by 77 mm, and the flexural strength and compressive strength at 28 d decreased to 450.8 kPa and 1236.5 kPa. When the curing agent dosage increased from 15% to 25%, the fluidity increased by 18.0 mm, and the flexural strength and compressive strength at 28 d increased by 1.7 times and 1.6 times. 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Zhang, Hengchun ; Yang, Zhengzhou ; Feng, Chao ; Wang, Yao ; Yu, Demei ; Fu, Tengfei ; Zhang, Feng ; Huang, Xia</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c296t-a75162fb214681fc615dbf10775684a78ab9528d1c604fe045d5ae9db1e93fcd3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2024</creationdate><topic>Alkalinity</topic><topic>Calcium silicate hydrate</topic><topic>Cement</topic><topic>Cemented carbides</topic><topic>Compressive strength</topic><topic>Curing</topic><topic>Curing agents</topic><topic>Dosage</topic><topic>Flexural strength</topic><topic>Fluidizing</topic><topic>Fourier transforms</topic><topic>Geopolymers</topic><topic>GGBS</topic><topic>Hydration</topic><topic>Industrial wastes</topic><topic>Loess</topic><topic>Mechanical properties</topic><topic>Microstructure</topic><topic>Raw materials</topic><topic>Scanning electron microscopy</topic><topic>Slag</topic><topic>Soil mechanics</topic><topic>Soil properties</topic><topic>Soil strength</topic><topic>Soil structure</topic><topic>Solidification</topic><topic>Solids</topic><topic>Synthesis</topic><topic>Water</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Chen, Shujie</creatorcontrib><creatorcontrib>Zhang, Hengchun</creatorcontrib><creatorcontrib>Yang, Zhengzhou</creatorcontrib><creatorcontrib>Feng, Chao</creatorcontrib><creatorcontrib>Wang, Yao</creatorcontrib><creatorcontrib>Yu, Demei</creatorcontrib><creatorcontrib>Fu, Tengfei</creatorcontrib><creatorcontrib>Zhang, Feng</creatorcontrib><creatorcontrib>Huang, Xia</creatorcontrib><collection>PubMed</collection><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Technology Research Database</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection (ProQuest)</collection><collection>ProQuest One Community College</collection><collection>ProQuest Materials Science Collection</collection><collection>ProQuest Central Korea</collection><collection>SciTech Premium Collection</collection><collection>Materials Research Database</collection><collection>Materials Science Database</collection><collection>Materials Science Collection</collection><collection>Publicly Available Content Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>MEDLINE - Academic</collection><collection>PubMed Central (Full Participant titles)</collection><jtitle>Materials</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Chen, Shujie</au><au>Zhang, Hengchun</au><au>Yang, Zhengzhou</au><au>Feng, Chao</au><au>Wang, Yao</au><au>Yu, Demei</au><au>Fu, Tengfei</au><au>Zhang, Feng</au><au>Huang, Xia</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Mechanical Properties and Microstructure of Geopolymer-Based PFSS Synthesized from Excavated Loess</atitle><jtitle>Materials</jtitle><addtitle>Materials (Basel)</addtitle><date>2024-12-25</date><risdate>2024</risdate><volume>18</volume><issue>1</issue><spage>30</spage><pages>30-</pages><issn>1996-1944</issn><eissn>1996-1944</eissn><abstract>Pre-mixed fluidized solidified soil (PFSS) has the advantages of pumpability, convenient construction, and a short setting time. This paper took the excavated loess in Fuzhou as the research object and used cement-fly-ash-ground granulated blast furnace slag-carbide slag as a composite geopolymer system (CFGC) to synthesize PFSS. This study investigated the fluidity and mechanical strength of PFSS under different water-solid ratios and curing agent dosages; finally, the microstructure of the composite geopolymer system-pre-mixed fluidized solidified soil (CFGC-PFSS) was characterized. The results showed that when the water-solid ratio of PFSS increased from 0.46 to 0.54, the fluidity increased by 77 mm, and the flexural strength and compressive strength at 28 d decreased to 450.8 kPa and 1236.5 kPa. When the curing agent dosage increased from 15% to 25%, the fluidity increased by 18.0 mm, and the flexural strength and compressive strength at 28 d increased by 1.7 times and 1.6 times. A large number of needle-like AFt, C-S-H gel, and C-(A)-S-H gel coagulate with soil particles to form a three-dimensional reticular structure, which is the mechanism of the strength formation of PFSS under the action of CFGC.</abstract><cop>Switzerland</cop><pub>MDPI AG</pub><pmid>39795674</pmid><doi>10.3390/ma18010030</doi><orcidid>https://orcid.org/0000-0003-0939-7967</orcidid><oa>free_for_read</oa></addata></record> |
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| source | MDPI - Multidisciplinary Digital Publishing Institute; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; PubMed Central; Free Full-Text Journals in Chemistry; PubMed Central Open Access |
| subjects | Alkalinity Calcium silicate hydrate Cement Cemented carbides Compressive strength Curing Curing agents Dosage Flexural strength Fluidizing Fourier transforms Geopolymers GGBS Hydration Industrial wastes Loess Mechanical properties Microstructure Raw materials Scanning electron microscopy Slag Soil mechanics Soil properties Soil strength Soil structure Solidification Solids Synthesis Water |
| title | Mechanical Properties and Microstructure of Geopolymer-Based PFSS Synthesized from Excavated Loess |
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