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Investigating the properties of jet grouting columns with fine-grained cement and silica fume

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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.… Click to show full abstract

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.

Keywords: fine grained; cement; jet grouting; grained cement; dmfc 800

Journal Title: Construction and Building Materials
Year Published: 2020

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