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Investigating the properties of jet grouting columns with fine-grained cement and silica fume
Highlights Smaller binder grain size requires more water to injectibility. Fine grained cement well penetrated into soil and provide better mechanic characteristics. SF admixtured OPC cement has better mechanic characteristics than OPC. SEM images supported that both fine grained cement and SF improved the hydration.
Abstract In Jet Grouting (JG) applications, manufacturing of jet grouted columns which answer the purpose, is possible by designing proper injection fluid which is a cement grout in most cases. In this study, the impacts of three different binder types on the performance of JG columns was investigated. Fine-grained cement (DMFC-800), Ordinary Portland Cement (OPC) and the mixture of OPC cement including 10% silica fume (SF) by weight were used as binders. Grouting mixtures were prepared at various water/cement (W/C) ratios, then JG columns were manufactured. Whilst the maximum unconfined compressive strength (UCS) value was obtained from fine grained cement induced samples (max. UCS = 24.6 MPa for W/C = 1.0), very high strength values were detected for OPC + 10%SF induced samples as well. The maximum splitting tensile strength (STS) values for OPC + 10% SF induced samples were found to be (min. STS = 3.62 MPa for W/C = 1.25). Furthermore, after the permeability tests, it was observed that the columns with DMFC-800 and OPC + 10% SF induced mixtures exhibit the lowest permeability coefficients as compared to columns made from the other binders (min. k = 0.1124 × 10−8 m/s for DMFC-800). Scanning electron microscope (SEM) image analysis revealed that DMFC-800 cement and OPC + 10% SF induced mixture reduced the voids between particles and enhanced the binding ability of the grouting mixture.
Investigating the properties of jet grouting columns with fine-grained cement and silica fume
Highlights Smaller binder grain size requires more water to injectibility. Fine grained cement well penetrated into soil and provide better mechanic characteristics. SF admixtured OPC cement has better mechanic characteristics than OPC. SEM images supported that both fine grained cement and SF improved the hydration.
Abstract In Jet Grouting (JG) applications, manufacturing of jet grouted columns which answer the purpose, is possible by designing proper injection fluid which is a cement grout in most cases. In this study, the impacts of three different binder types on the performance of JG columns was investigated. Fine-grained cement (DMFC-800), Ordinary Portland Cement (OPC) and the mixture of OPC cement including 10% silica fume (SF) by weight were used as binders. Grouting mixtures were prepared at various water/cement (W/C) ratios, then JG columns were manufactured. Whilst the maximum unconfined compressive strength (UCS) value was obtained from fine grained cement induced samples (max. UCS = 24.6 MPa for W/C = 1.0), very high strength values were detected for OPC + 10%SF induced samples as well. The maximum splitting tensile strength (STS) values for OPC + 10% SF induced samples were found to be (min. STS = 3.62 MPa for W/C = 1.25). Furthermore, after the permeability tests, it was observed that the columns with DMFC-800 and OPC + 10% SF induced mixtures exhibit the lowest permeability coefficients as compared to columns made from the other binders (min. k = 0.1124 × 10−8 m/s for DMFC-800). Scanning electron microscope (SEM) image analysis revealed that DMFC-800 cement and OPC + 10% SF induced mixture reduced the voids between particles and enhanced the binding ability of the grouting mixture.
Investigating the properties of jet grouting columns with fine-grained cement and silica fume
Olgun, Murat (author) / Kanat, Askar (author) / Senkaya, Alican (author) / Erkan, Ibrahim Hakkı (author)
2020-08-14
Article (Journal)
Electronic Resource
English
UCS , Unconfined Compressive Strength , STS , Splitting Tensile Strength , OPC , Ordinary Portland cement , k , Coefficient of permeability , JG , Jet grout , SF , Silica fume , W/C , Water to cement ratio of cement grout , Jet grouting , Fine-grained cement , Unconfined compressive strength , Permeability test in triaxial test apparatus
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