Effect of Dry-Wet Cycles on Strength Properties and Microstructure of Lime-Metakaolin-Modified Soil
To explore the feasibility of replacing natural hydraulic lime (NHL) with lime-metakaolin (L-MK) in the restoration of soil sites, the samples of L-MK-modified silty sand (hereinafter L-MK-modified soil) underwent 0, 5, 10, and 15 dry-wet cycles and were then tested for mass loss, unconfined compres...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2022-01-01
|
| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2022/1296288 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849409079573741568 |
|---|---|
| author | Xinming Li Haoyang Zhang Yanrui Guo Song Yin Kebin Ren |
| author_facet | Xinming Li Haoyang Zhang Yanrui Guo Song Yin Kebin Ren |
| author_sort | Xinming Li |
| collection | DOAJ |
| description | To explore the feasibility of replacing natural hydraulic lime (NHL) with lime-metakaolin (L-MK) in the restoration of soil sites, the samples of L-MK-modified silty sand (hereinafter L-MK-modified soil) underwent 0, 5, 10, and 15 dry-wet cycles and were then tested for mass loss, unconfined compressive strength, and splitting tensile strength. Some samples were tested using XRD, TG and SEM microscopic tests to study the strength mechanism for L-MK- and NHL-modified soil. The results showed that the mass loss ratios of the L-MK- and NHL-modified soils after 15 dry-wet cycles were within 2%. The compressive and tensile strengths of the L-MK-modified soil decreased with more dry-wet cycles, but the tensile strength decreased sharply initially and then to be stable after five dry-wet cycles. The attenuation characteristics were different obviously for the failure mode of compressive and tensile strength and the unevenness of the specimen caused by dry-wet cycles. The compressive and tensile strengths of L-MK-modified soil were significantly higher than those of NHL-modified soil after the same dry-wet cycle, and the decreased range of compressive and tensile strength was smaller than that of NHL-modified soil. The strength formation and attenuation characteristics of L-MK-modified soil are closely related to the influence of dry-wet cycles on the hydration products (e.g., CSH and C4AH13) generated by hydration reaction. The mix proportion of 6% L + 4% MK can effectively replace 8% and 10% NHL to protect soil sites. |
| format | Article |
| id | doaj-art-77c0d389725148c4bb85ddf83fe99e33 |
| institution | Kabale University |
| issn | 1687-8094 |
| language | English |
| publishDate | 2022-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-77c0d389725148c4bb85ddf83fe99e332025-08-20T03:35:37ZengWileyAdvances in Civil Engineering1687-80942022-01-01202210.1155/2022/1296288Effect of Dry-Wet Cycles on Strength Properties and Microstructure of Lime-Metakaolin-Modified SoilXinming Li0Haoyang Zhang1Yanrui Guo2Song Yin3Kebin Ren4School of Civil Engineering and ArchitectureSchool of Civil Engineering and ArchitectureSchool of Civil Engineering and ArchitectureSchool of Civil Engineering and ArchitectureHenan Provincial Architectural Heritage Protection and Research InstituteTo explore the feasibility of replacing natural hydraulic lime (NHL) with lime-metakaolin (L-MK) in the restoration of soil sites, the samples of L-MK-modified silty sand (hereinafter L-MK-modified soil) underwent 0, 5, 10, and 15 dry-wet cycles and were then tested for mass loss, unconfined compressive strength, and splitting tensile strength. Some samples were tested using XRD, TG and SEM microscopic tests to study the strength mechanism for L-MK- and NHL-modified soil. The results showed that the mass loss ratios of the L-MK- and NHL-modified soils after 15 dry-wet cycles were within 2%. The compressive and tensile strengths of the L-MK-modified soil decreased with more dry-wet cycles, but the tensile strength decreased sharply initially and then to be stable after five dry-wet cycles. The attenuation characteristics were different obviously for the failure mode of compressive and tensile strength and the unevenness of the specimen caused by dry-wet cycles. The compressive and tensile strengths of L-MK-modified soil were significantly higher than those of NHL-modified soil after the same dry-wet cycle, and the decreased range of compressive and tensile strength was smaller than that of NHL-modified soil. The strength formation and attenuation characteristics of L-MK-modified soil are closely related to the influence of dry-wet cycles on the hydration products (e.g., CSH and C4AH13) generated by hydration reaction. The mix proportion of 6% L + 4% MK can effectively replace 8% and 10% NHL to protect soil sites.http://dx.doi.org/10.1155/2022/1296288 |
| spellingShingle | Xinming Li Haoyang Zhang Yanrui Guo Song Yin Kebin Ren Effect of Dry-Wet Cycles on Strength Properties and Microstructure of Lime-Metakaolin-Modified Soil Advances in Civil Engineering |
| title | Effect of Dry-Wet Cycles on Strength Properties and Microstructure of Lime-Metakaolin-Modified Soil |
| title_full | Effect of Dry-Wet Cycles on Strength Properties and Microstructure of Lime-Metakaolin-Modified Soil |
| title_fullStr | Effect of Dry-Wet Cycles on Strength Properties and Microstructure of Lime-Metakaolin-Modified Soil |
| title_full_unstemmed | Effect of Dry-Wet Cycles on Strength Properties and Microstructure of Lime-Metakaolin-Modified Soil |
| title_short | Effect of Dry-Wet Cycles on Strength Properties and Microstructure of Lime-Metakaolin-Modified Soil |
| title_sort | effect of dry wet cycles on strength properties and microstructure of lime metakaolin modified soil |
| url | http://dx.doi.org/10.1155/2022/1296288 |
| work_keys_str_mv | AT xinmingli effectofdrywetcyclesonstrengthpropertiesandmicrostructureoflimemetakaolinmodifiedsoil AT haoyangzhang effectofdrywetcyclesonstrengthpropertiesandmicrostructureoflimemetakaolinmodifiedsoil AT yanruiguo effectofdrywetcyclesonstrengthpropertiesandmicrostructureoflimemetakaolinmodifiedsoil AT songyin effectofdrywetcyclesonstrengthpropertiesandmicrostructureoflimemetakaolinmodifiedsoil AT kebinren effectofdrywetcyclesonstrengthpropertiesandmicrostructureoflimemetakaolinmodifiedsoil |