Effects of Fineness and Dosage of Fly Ash on the Fracture Properties and Strength of Concrete
| Autor: | Tsong Yen, Chung-Ho Huang, Chung-Hao Wu, Yu-Cheng Kan |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Critical stress fracture energy Fineness 0211 other engineering and technologies 02 engineering and technology lcsh:Technology lcsh:Chemistry Fracture toughness critical stress intensity factor 0203 mechanical engineering fineness 021105 building & construction General Materials Science lcsh:QH301-705.5 Instrumentation Fluid Flow and Transfer Processes lcsh:T Process Chemistry and Technology Metallurgy General Engineering Fracture mechanics compressive strength lcsh:QC1-999 Computer Science Applications 020303 mechanical engineering & transports Compressive strength fly ash lcsh:Biology (General) lcsh:QD1-999 lcsh:TA1-2040 Fly ash Fracture (geology) Cementitious lcsh:Engineering (General). Civil engineering (General) lcsh:Physics |
| Zdroj: | Applied Sciences Volume 9 Issue 11 Applied Sciences, Vol 9, Iss 11, p 2266 (2019) |
| ISSN: | 2076-3417 |
| DOI: | 10.3390/app9112266 |
| Popis: | This study focuses on evaluating the effects of the fineness of fly ash on the strength, fracture toughness, and fracture resistance of concrete. Three fineness levels of fly ash that respectively pass sieves&mdash no. 175, no. 250, and no. 32&mdash were used. In addition to the control concrete mixture without fly ash, two fly ash replacement levels of 10% and 20% by weight of the cementitious material were selected for the concrete mixture. The experimental results indicate that the compressive strength of the fly ash concrete decreases with the increase in the replacement ratio of fly ash but increases in conjunction with the fineness level of fly ash. The presence of finer fly ash can have beneficial effects on the fracture energy (GF) of concrete at an early age (14 days) and attain a higher increment of GF at a later age (56 days). The concrete containing finer fly ash was found to present larger critical stress intensity factors (KSIC) at various ages, and the KSIC also increases in conjunction with the fineness levels of fly ash. |
| Databáze: | OpenAIRE |
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