Mechanical properties of slag-fly ash based geopolymer stabilized sandy soil
Silicate cement as a conventional soil curing agent has problems of high energy consumption and high emissions, and researchers have been seeking a more economical and environmentally friendly alternative to cement. In this study, geopolymers based on ground granulated blast-furnace slag (GGBS) and...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
SCIENCE PRESS , 16 DONGHUANGCHENGGEN NORTH ST, BEIJING, PEOPLES R CHINA, 100717
2022-09-01
|
| Series: | Rock and Soil Mechanics |
| Subjects: | |
| Online Access: | http://rocksoilmech.whrsm.ac.cn/EN/10.16285/j.rsm.2021.6925 |
| _version_ | 1811198597658574848 |
|---|---|
| author | ZHANG Jin-jin LI Bo YU Chuang ZHANG Mao-yu |
| author_facet | ZHANG Jin-jin LI Bo YU Chuang ZHANG Mao-yu |
| author_sort | ZHANG Jin-jin |
| collection | DOAJ |
| description | Silicate cement as a conventional soil curing agent has problems of high energy consumption and high emissions, and researchers have been seeking a more economical and environmentally friendly alternative to cement. In this study, geopolymers based on ground granulated blast-furnace slag (GGBS) and fly ash (FA) were used to reinforce sandy soils, and the effects of different factors on the mechanical properties of geopolymer stabilized sandy soils were investigated by adjusting the type and ratio of exciter, slag-fly ash ratio, water-cement ratio, and curing conditions. The specimens were studied in depth by unconfined compressive strength (UCS) test, electron computed tomography (CT) analysis, and scanning electron microscopy (SEM). The results show that the GGBS-FA-based geopolymer can effectively improve the mechanical properties of the sandy soil; the reinforcement effect of the composite exciter is better than that of the single-component exciter; the low temperature does not significantly reduce the final mechanical properties of the geopolymer stabilized sandy soil, but only delays the polymerization reaction and structure formation; the alkaline environment promotes the strength of the geopolymer stabilized sandy soil; the acidic environment and prolonged exposure to air reduce the strength of geopolymer stabilized sandy soils. |
| first_indexed | 2024-04-12T01:34:09Z |
| format | Article |
| id | doaj.art-8bd17bba7ab047b59d60530dcb5ac40a |
| institution | Directory Open Access Journal |
| issn | 1000-7598 |
| language | English |
| last_indexed | 2024-04-12T01:34:09Z |
| publishDate | 2022-09-01 |
| publisher | SCIENCE PRESS , 16 DONGHUANGCHENGGEN NORTH ST, BEIJING, PEOPLES R CHINA, 100717 |
| record_format | Article |
| series | Rock and Soil Mechanics |
| spelling | doaj.art-8bd17bba7ab047b59d60530dcb5ac40a2022-12-22T03:53:23ZengSCIENCE PRESS , 16 DONGHUANGCHENGGEN NORTH ST, BEIJING, PEOPLES R CHINA, 100717Rock and Soil Mechanics1000-75982022-09-014392421243010.16285/j.rsm.2021.6925Mechanical properties of slag-fly ash based geopolymer stabilized sandy soil ZHANG Jin-jin 0LI Bo1YU Chuang2ZHANG Mao-yu31. College of Architecture and Civil Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, China 2. Wenzhou Key Laboratory of Intelligent Lifeline Protection and Emergency Technology for Resilient City, Wenzhou Institute of Technology, Wenzhou, Zhejiang 325035, China1. College of Architecture and Civil Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, China 2. Wenzhou Key Laboratory of Intelligent Lifeline Protection and Emergency Technology for Resilient City, Wenzhou Institute of Technology, Wenzhou, Zhejiang 325035, China1. College of Architecture and Civil Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, China3. School of Civil Engineering and Architecture, Taizhou University, Taizhou, Zhejiang 318000, ChinaSilicate cement as a conventional soil curing agent has problems of high energy consumption and high emissions, and researchers have been seeking a more economical and environmentally friendly alternative to cement. In this study, geopolymers based on ground granulated blast-furnace slag (GGBS) and fly ash (FA) were used to reinforce sandy soils, and the effects of different factors on the mechanical properties of geopolymer stabilized sandy soils were investigated by adjusting the type and ratio of exciter, slag-fly ash ratio, water-cement ratio, and curing conditions. The specimens were studied in depth by unconfined compressive strength (UCS) test, electron computed tomography (CT) analysis, and scanning electron microscopy (SEM). The results show that the GGBS-FA-based geopolymer can effectively improve the mechanical properties of the sandy soil; the reinforcement effect of the composite exciter is better than that of the single-component exciter; the low temperature does not significantly reduce the final mechanical properties of the geopolymer stabilized sandy soil, but only delays the polymerization reaction and structure formation; the alkaline environment promotes the strength of the geopolymer stabilized sandy soil; the acidic environment and prolonged exposure to air reduce the strength of geopolymer stabilized sandy soils. http://rocksoilmech.whrsm.ac.cn/EN/10.16285/j.rsm.2021.6925geopolymerstabilized sandy soilunconfined compressive strength (ucs)microstructure |
| spellingShingle | ZHANG Jin-jin LI Bo YU Chuang ZHANG Mao-yu Mechanical properties of slag-fly ash based geopolymer stabilized sandy soil Rock and Soil Mechanics geopolymer stabilized sandy soil unconfined compressive strength (ucs) microstructure |
| title | Mechanical properties of slag-fly ash based geopolymer stabilized sandy soil |
| title_full | Mechanical properties of slag-fly ash based geopolymer stabilized sandy soil |
| title_fullStr | Mechanical properties of slag-fly ash based geopolymer stabilized sandy soil |
| title_full_unstemmed | Mechanical properties of slag-fly ash based geopolymer stabilized sandy soil |
| title_short | Mechanical properties of slag-fly ash based geopolymer stabilized sandy soil |
| title_sort | mechanical properties of slag fly ash based geopolymer stabilized sandy soil |
| topic | geopolymer stabilized sandy soil unconfined compressive strength (ucs) microstructure |
| url | http://rocksoilmech.whrsm.ac.cn/EN/10.16285/j.rsm.2021.6925 |
| work_keys_str_mv | AT zhangjinjin mechanicalpropertiesofslagflyashbasedgeopolymerstabilizedsandysoil AT libo mechanicalpropertiesofslagflyashbasedgeopolymerstabilizedsandysoil AT yuchuang mechanicalpropertiesofslagflyashbasedgeopolymerstabilizedsandysoil AT zhangmaoyu mechanicalpropertiesofslagflyashbasedgeopolymerstabilizedsandysoil |