High-Performance Grouting Mortar Based on Mineral Admixtures

Ma, Cong; Tan, Yuehu; Li, Erbing; Meng, Yunxiao

doi:10.1155/2015/425456

Cited by 10 publications

(9 citation statements)

References 21 publications

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“…The adverse effects of PP fiber were compensated by the addition of SP through enhanced flowability and reduced permeability. In the study conducted by Ma et al [3], cement grouts containing bauxite and gypsum as mineral admixtures were used. The resulting grout mixes had good fluidity, short setting time, and high strength.…”

Section: Literature Reviewmentioning

confidence: 99%

Properties of cement grout modified with ultra-fine slag

Gopinathan

Anand

2017

Front. Struct. Civ. Eng.

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The purpose of the study is to obtain a cement grout with improved performance. The grout mixes of the present study contain cement, ultra-fine slag (UFS), super plasticizer and water. Properties like flowability, bleeding, compressive strength and shrinkage of cement grouts have been studied. Rheological parameters were also studied in order to explain the grout workability. The results show that, cement replacement with slag in grouts could reduce bleeding substantially without affecting the workability of the mixes. Introduction of slag enhanced the compressive strength and reduced shrinkage reasonably. Ultra-fine slag can be used as a supplementary cementitious material in cementitious grouts in order to improve the grout behavior.

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Section: Literature Reviewmentioning

confidence: 99%

Properties of cement grout modified with ultra-fine slag

Gopinathan

Anand

2017

Front. Struct. Civ. Eng.

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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.…”

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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“…No bleeding and segregation is mandatory in high fluidity cement-based materials, such as self-compacting concrete, self-leveling floor, and grout materials. Generally, this can be obtained with addition of viscosity-enhancing agent (VEA) and superplasticizer [ 1 , 2 , 3 ]. Polyacrylic acid (PAA) is one of the most commonly used viscosity-enhancing agents with an excellent effect on resisting bleeding and segregation [ 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Polyacrylic Acid on Rheology of Cement Paste Plasticized by Polycarboxylate Superplasticizer

Peng

Tan

et al. 2018

Materials

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Viscosity-enhancing agents (VEA) have been widely employed in high flowability cement-based materials, so as to ensure that no bleeding and segregation would occur. However, in most cases, interaction between VEA and superplasticizer would be unavoidable. In this study, the effect of polyacrylic acid (PAA), known as one of the most commonly used VEAs, on rheology performance of cement paste containing polycarboxylate superplasticizer (PCE), was studied. The initial fluidity was assessed with mini slump, and rheological behavior of cement paste was evaluated with rotor rheometer. Adsorption amount was examined with total organic carbon (TOC) analyzer, and the zeta potential was also tested. The interaction between PAA and PCE in the presence of calcium ion (Ca2+) was analyzed with conductivity, X-ray photoelectron spectroscope (XPS), and dynamic light scattering (DLS). The results illustrate that PAA can adsorb onto the surface of cement particles to plasticize cement paste, being similar to PCE. In the presence of Ca2+, PAA can be curled and crosslinked, as a result of the combination between carboxyl groups (COO−) and Ca2+, thereby affecting the adsorption performance and conformation behavior. It is interesting that negative impact of PAA on dispersion efficiency of PCE can be demonstrated; one reason is the reduced adsorption amount of PCE by PAA competitively adsorbing onto the cement surface, and another possible reason is the invalided PCE by adsorption of PAA. Additionally, molecular weight of PAA should be considered if being used as VEA in PCE system.

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High-Performance Grouting Mortar Based on Mineral Admixtures

Cited by 10 publications

References 21 publications

Properties of cement grout modified with ultra-fine slag

Properties of cement grout modified with ultra-fine slag

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

Effect of Polyacrylic Acid on Rheology of Cement Paste Plasticized by Polycarboxylate Superplasticizer

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