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

Olgun, Murat; Kanat, Askar; Senkaya, Alican; Erkan, İbrahim Hakkı

doi:10.1016/j.conbuildmat.2020.120637

Cited by 12 publications

(4 citation statements)

References 37 publications

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“…Like fine aggregate fills in the spaces between coarse aggregate particles, silica fume fills in the spaces between cement grains. This phenomenon is frequently referred to as "particle packing" or "micro-filling" [20]. At the same time, the chemical contribution of silica fume is that it is a very reactive pozzolanic material in concrete because of its very high amorphous silicon dioxide content.…”

Section: Silica Fumementioning

confidence: 99%

Characteristics of Pile Models Injected by Low-Pressure-Injection Laboratory Setup for Chemical Improving Loose Sandy Soil

Mohammed,

Ahmed

2023

E3S Web Conf.

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The jet grouting method for soil improvement is a novel geotechnical alternative for enhancing problematic soils where traditional foundation designs cannot provide sustainable solutions. The paper methodology was based on improving loose fine sandy soil using silica fume as a chemical additive added (with 10 percent of the cement weight) to the water and Portland cement mixes with different W/C ratios to produce pile models injected by a low-pressure injection laboratory setup that was designed and locally manufactured for this purpose. The setup design was inspired by previous research works, where its performance was validated by systematically performing unconfined compression tests (UCTs) on samples of the laboratory-injected pile models. Based on the UCTs results, high determination coefficient (R2) mathematical models were developed that related the W/C ratios of the injected mixtures to the basic parameters (cohesion, friction angle, and elasticity modulus) of the grouted pile models, validating the laboratory setup injection efficiency.

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Section: Silica Fumementioning

confidence: 99%

Characteristics of Pile Models Injected by Low-Pressure-Injection Laboratory Setup for Chemical Improving Loose Sandy Soil

Mohammed,

Ahmed

2023

E3S Web Conf.

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“…In addition, it is necessary to specify which soft soil properties should be improved [1,2]. By selecting a suitable method according to the soil parameters, improving the soil and as a result, the bearing capacity increases, settlements and impermeability decrease, and liquefaction resistance increases [3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Mechanical and Physical Features of Cementitious Jet Grout Applications for Various Soil Types

Cinar

2023

Buildings

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The cementitious jet grout method (CJG) is one of the most preferred methods for the ground reinforcement of building foundations. As a result of the soil improvement made with the CJG, it was observed that there was a decrease in settlement, permeability, and liquefaction potential and an increase in the bearing capacity. In this study, columns with different grouting pressures (400, 450, and 500 bar) and water/cement ratios of 0.75, 1.00, and 1.25 were produced on several soil types (sand, clay, and alluvial soil) that have high liquefaction, settlement potential, and low bearing capacity. CJG columns were kept for 28 days after completion and then removed from the soil, and diameter measurements were made and significant differences were observed according to pressure and w/c ratios. Three samples were taken in CJG columns extracted from the ground. Laboratory tests were conducted to determine the physical (water absorption rate, density, and porosity) and mechanical (UCS and UPV) properties of CJG column samples. The highlighting of this paper is to build full-scale CJG columns in sandy soil, clay soil, and alluvial soil, increase the geotechnical engineering properties, and investigate the strength development, and diameter under different w/c ratios and different injection pressures. The strength of CJG columns in sandy soils was found between 36 and 15 MPa, in clay soils between 15 and 4 MPa and in alluvial soils between 32 and 15 MPa. Moreover, it was observed that there was a significant increase in the diameters with the increase in the injection pressure and a decrease in the compressive strengths. When the CJG column diameters were compared with constant injection pressure and increasing w/c ratios, the maximum increase was found to be 13% for sandy soils, 10% for clayey soils, and 14% for alluvial soils. The column diameters were 37% larger for sandy soils than clayey soils and 26% larger than alluvial soils at the same w/c ratio and constant injection pressure. In conclusion, since the results found in this study were made on a real scale in the field and for three different soil conditions, the results can be used directly in future engineering applications.

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“…However, at present, there is a lack of systematic research on the influence of components on the macro properties and microstructure of grout and the correlation between them. In addition, in order to achieve high strength performance in grouting materials, it is usually necessary to add essential materials, such as nano silica [22,23], liquid sodium silicate [24], and silica fume [25], which significantly increases the cost of grouting materials. Therefore, it is of practical significance to prepare an more economical HSG which composed of cheap components.…”

Section: Introductionmentioning

confidence: 99%

Study on macro performance and micro-analysis of high strength grouting material

Shu,

Zeng,

Zhou

et al. 2023

Mater. Res. Express

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Wind turbine duct put forward higher requirements for the performance of grouting materials. In order to obtain more economical high strength grouting materials (HSG), three kinds of low price main components, cement, quartz sand (QS) and fly ash microspheres (MS) were utilized and developed. Macro performance and micro-analysis of the HSG were conducted. The macro performance tests revealed that the mix proportion of HSG is determined as, cement: QS: MS: superplasticizer: swelling agent=80:10:10:0.3:0.12, When the water binder ratio was lower than 0.26, fluidity loss rapid increased. Thus water binder ratio is determined as 0.26. Compressive and flexural strength of the HSG exceeding 120MPa and 20MPa respectively. The HSG also showed good fluidity and homogeneity. The micro-analysis showed that a complete and continuous micro-structure was formed, interface transition zone could not be observed. XRD ang TG-DSC meant that the amount of AFt increased, on the contrary, Ca(OH)2 decreased. pore diameter of the HSG was mostly 10nm. The addition of swelling agent and MS did not changed the types of hydration products of HSG, but the pore structure was optimized. Due to the cheap components, HSG can generate higher profits at the lower price, and which perform good economic benefits and market competitiveness.

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

Cited by 12 publications

References 37 publications

Characteristics of Pile Models Injected by Low-Pressure-Injection Laboratory Setup for Chemical Improving Loose Sandy Soil

Characteristics of Pile Models Injected by Low-Pressure-Injection Laboratory Setup for Chemical Improving Loose Sandy Soil

Investigation of Mechanical and Physical Features of Cementitious Jet Grout Applications for Various Soil Types

Study on macro performance and micro-analysis of high strength grouting material

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