Engineering Properties of Medium-to-Fine Sands Injected with Microfine Cement Grout

Mollamahmutoğlu, Murat; Yılmaz, Yüksel

doi:10.1080/1064119x.2010.517715

Cited by 56 publications

(9 citation statements)

References 12 publications

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“…Additives and admixtures play an important role in the production of more durable grouts than those that can be obtained using neat cement suspensions, increasing the effectiveness of grouting (Anagnostopoulos, 2005;Cambefort, 1977;Mollamahmutoglu and Yilmaz, 2011;Nonveiller, 1989).…”

Section: Introductionmentioning

confidence: 97%

Effect of acrylic latex on the properties of cement grouts

Anagnostopoulos

Patsios

2019

Proceedings of the Institution of Civil Engineers - Constructio

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The main objective of this comprehensive laboratory project was to investigate the potential use of acrylic latex to improve the physical and mechanical properties of thick superplasticised cement grouts. Experiments were conducted using different acrylic latex dosages with cement grouts that were prepared with water to cement ratios of 0·5, 0·4 and 0·33. The results indicated that the addition of acrylic latex of up to 5% significantly increases the 28 and 90 d strength, despite an extension of the setting time. The bleeding and resistance to acid attack of acrylic latex modified grouts were significantly improved. Grouts containing acrylic latex had much a higher viscosity and yield stress than the un-modified grouts. However, acrylic latex reduces the viscosity and yield stress of grouts that were prepared with water to cement ratios of 0·5 and 0·4 when added in small amounts. Based on the experimental results, nonlinear regression analysis was performed to correlate the physical and mechanical parameters of the acrylic latex modified grouts and the descriptor variables.

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Section: Introductionmentioning

confidence: 97%

Effect of acrylic latex on the properties of cement grouts

Anagnostopoulos

Patsios

2019

Proceedings of the Institution of Civil Engineers - Constructio

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“…Despite numerous experimental studies on strain-dependent wave propagation in single or multiple rock joints, the strain-dependent characteristics of grouted joints have yet to be theoretically investigated. The strain-dependent properties of grouted soils have been extensively documented for different soil types, cementing agents, and additives using resonant-column or bender-element tests for a wide range of strain levels [ 25 , 26 , 27 , 28 , 29 ]. However, owing to difficulties in simulating grouted joints and testing methodologies, the strain-dependent behavior of grouted rock joints has yet to be properly assessed.…”

Section: Introductionmentioning

confidence: 99%

Experimental Characterization of Stress- and Strain-Dependent Stiffness in Grouted Rock Masses

2018

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Grouting of fractured rock mass prior to excavation results in grout-filled discontinuities that govern the deformation characteristics of a site. The influence of joint characteristics on the properties of grouted rocks is important in assessing the effects of grouting on jointed rock mass. However, grouting remains a predominantly empirical practice and the effects of grouting on rock joint behavior and material properties have yet to be accurately assessed. Granular materials, including jointed rocks, typically display nonlinear strain-dependent responses that can be characterized by the shear modulus degradation curve. In this study, the effects of grouting on the strain-dependent shear stiffness of jointed rock mass were investigated at the small-strain (below 10−5) and mid-strain (10−5 to 10−3) ranges using the quasi-static resonant column test and rock mass dynamic test devices. The effects of curing time, axial stress, initial joint roughness, and grouted joint thickness were examined. The results show that (1) grouting of rock joints leads to decreased stress sensitivity and increased small-strain shear stiffness for all tested samples; (2) the grouted rock samples display similar modulus degradation characteristics as the applied grout material; (3) the initial joint roughness determines the stress-dependent behaviors and general stiffness range of the jointed and grouted rocks, but the strain-dependent behaviors are dependent on the properties of the grout material; (4) increased grouted joint thickness results in larger contribution of the grout properties in the overall grouted rock mass.

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“…To promote grouting technique in civil engineering, many researchers have released the studies on grouting materials [15,16], grouting performance [17][18][19], and grouting device [20]. Mollamahmutoglu and Yilmaz [21] firstly evaluated some basic properties of the superfine cement suspensions such as stability, viscosity, and setting time, and then permeability behaviors under different grouting pressures of the studied suspensions injected into sand specimens with different gradations were examined. Markou and Droudakis [22] evaluated some relevant parameters influencing grout effectiveness by an experimental investigation.…”

Section: Introductionmentioning

confidence: 99%

Modelling of Permeation Grouting considering Grout Self-Gravity Effect: Theoretical and Experimental Study

Wang

Zhang

et al. 2019

Advances in Materials Science and Engineering

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Self-gravity is one key parameter for behavior characterization of grout permeation and diffusion.is study proposes mathematical models for permeation grouting with consideration of grout self-gravity effect. e models concerning power law, Bingham, and Newtonian grouts are based on the generalized Darcy's law and spherical diffusion theory. In addition, a prediction model of grout concretion dimension used for Bingham grout was developed. An analysis of the injection pressure distribution law and a comparative evaluation of diffusion radius considering self-gravity effect using established models were conducted subsequently. Moreover, grouting experiments were performed to check and verify the prediction model. e experimental results showed that injection pressure decreases linearly with increase of diffusion radius for the power-law grout, while nonlinear decrease of injection pressure was confirmed in Bingham and Newtonian grouts in this case. ree grouts approximately diffuse in an "ellipsoidal" shape, and it is confirmed that the diffusion radius is closely related to grout self-gravity. e Newtonian grout produces the maximum diffusion radius compared with the other two grouts whether the gravity effects were considered or not. e grout quantity under a smaller water-to-cement (w/c) ratio exhibits a significant difference and undergoes two increasing stages, whereas the quantity simply tends to be stable after it reaches its maximum in terms of the larger (w/c) ratios. e constructed dimension prediction model agrees well with the experimental results, which can be helpful for design and assessment of the grouting scheme.

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Engineering Properties of Medium-to-Fine Sands Injected with Microfine Cement Grout

Cited by 56 publications

References 12 publications

Effect of acrylic latex on the properties of cement grouts

Effect of acrylic latex on the properties of cement grouts

Experimental Characterization of Stress- and Strain-Dependent Stiffness in Grouted Rock Masses

Modelling of Permeation Grouting considering Grout Self-Gravity Effect: Theoretical and Experimental Study

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