期刊
MATERIALS
卷 15, 期 9, 页码 -出版社
MDPI
DOI: 10.3390/ma15093090
关键词
wood fly ash (WFA); sand; cement stabilized mixtures; mechanical properties
类别
资金
- Faculty of Civil Engineering and Architecture Osijek, Croatia
The article describes the laboratory evaluation of sand mixtures modified with wood fly ash and stabilized with different amounts of cement. The test results show that wood fly ash has a considerable stabilization effect on the sand mixture and improves its load bearing capacity. By adding a small quantity of cement, the strength and resistance to freezing of the stabilized mixture are enhanced. The results indicate that by replacing part of the sand with wood fly ash, higher strengths can be achieved with reduced cement content.
The article describes the laboratory evaluation of mixtures of sand modified with wood fly ash (WFA) and additionally stabilized with different amounts of cement. Laboratory research includes determining the California Bearing Ratio (CBR), compressive and indirect tensile strengths of the mixtures, and the resistance of mixtures to freezing/thawing cycles. The aim of the research is to determine if WFA, an alternative material, can improve sand bearing capacity and contribute to strength development while reducing necessary cement amounts and satisfying the technical regulation for use in pavement base courses. The test results obtained show that WFA has a considerable stabilization effect on the sand mixture and improves its load bearing capacity. By adding a small quantity of the cement, the hydraulic reaction in the stabilized mixture is more intense and results in greater strengths and an improved resistance to freezing. The test results show that, by replacement of part of the sand with WFA (in the quantity of 30%), greater strengths can be achieved in relation to the mixture of only sand and cement. Additionally, the content of cement necessary for the stabilization of sand (usually 8-12%) is considerably reduced, which enables cost savings in the construction of pavement structures.
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