Loading...
Please wait, while we are loading the content...
Similar Documents
Study on Influence Factors of Compressive Strength of Low Density Backfill Foamed Concrete Used in Natural Gas Pipeline Tunnel
| Content Provider | MDPI |
|---|---|
| Author | Li, Chunbao Li, Xiaotian Guan, Di Li, Shen Lv, Wenpu Cong, Ziqin Soloveva, Valentina Y. Dalerjon, Hojiboev Qin, Pengju Liu, Xiaohui |
| Copyright Year | 2022 |
| Description | Foamed concrete is mostly used for backfilling of long-distance tunnels and compressive strength is an important technical index to control the quality of foamed concrete. The influence factors on compressive strength of low-density foamed concrete were obtained by the single factor test method based on the targeted dry density and compressive strength. The results show that the HT composed of pollution-free animal protein oil and vegetable oil is an efficient foaming agent and can produce stable foams. The cementation ability of cement can be fully expressed when a water to cement ratio of 0.45~0.5 is employed, making foamed concrete have a compressive strength higher than 2 MPa. The foam content is inversely proportional to the compressive strength and dry density of foamed concrete, and the volume ratio of slurry to foam should be 2:1~3:1. The content of fly ash is also inversely proportional to the compressive strength but positively proportional to the dry density. When the content of admixture is 40~55%, the compressive strength of foamed concrete with low density is not less than 2 MPa. The mixing proportion can be changed in the reasonable range to meet the requirements of different projects. |
| Starting Page | 8333 |
| e-ISSN | 20711050 |
| DOI | 10.3390/su14148333 |
| Journal | Sustainability |
| Issue Number | 14 |
| Volume Number | 14 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-07-07 |
| Access Restriction | Open |
| Subject Keyword | Sustainability Foamed Concrete Low Density Compressive Strength Admixture Slurry–foam Ratio Water–cement Ratio |
| Content Type | Text |
| Resource Type | Article |
