Journal ArticleDOI
Development of microfine cement grouts by pulverizing ordinary cements
Ioannis A. Pantazopoulos,I. N. Markou,Dimitrios Christodoulou,A. I. Droudakis,Dimitrios K. Atmatzidis,S.K. Antiohos,E. Chaniotakis +6 more
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TLDR
In this article, three different cements (CEM I, CEM II/B-M and CEM IV/B according to EN 197-1) containing 0, 23.5% and 38% of pozzolan, respectively, were pulverized to obtain three additional gradations from each cement, with nominal maximum grain sizes of 40, 20 and 10μm.Abstract:
Three different cements (CEM I, CEM II/B-M and CEM IV/B according to EN 197-1) containing 0%, 23.5% and 38% of pozzolan, respectively, were pulverized to obtain three additional gradations from each cement, with nominal maximum grain sizes of 40, 20 and 10 μm. Cements with the two finer gradations are classified as “microfine” cements. Suspension properties, groutability and effectiveness of all cements were evaluated for water-to-cement ratios (W/C) of 1, 2 and 3 by weight. A superplasticizer was used to optimize rheological properties. The properties and performance of all suspensions tested are affected primarily by W/C ratio and cement fineness. All microfine cement suspensions have acceptable apparent viscosity, behave as Bingham fluids, are stable for W/C = 1, have reasonable setting times for field applications, have mostly predictable groutability and provide satisfactory strength to grouted sands. The finer gradations of II/B-M cement exhibited the best overall behavior and are considered as the most promising compared to similar gradations of the other two cements.read more
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Experimental study on performance of cement-based grouts admixed with fly ash, bentonite, superplasticizer and water glass
TL;DR: In this paper, the ASTM Type I Portland cement (PC), class F fly ash (FA), bentonite (B), superplasticizer (SP) and water glass were designed to improve properties of grouting materials in different aspects.
Journal ArticleDOI
Development of an injectable grout for concrete repair and strengthening
TL;DR: In this paper, the coupled effect of temperature and silica fume addition on rheological, mechanical behaviour and porosity of grouts based on CEMI 42.5R, proportioned with a polycarboxylate-based high range water reducer was investigated.
Journal ArticleDOI
Performance and hydration study of ultra-fine sulfoaluminate cement-based double liquid grouting material
TL;DR: In this article, a double liquid grouting material (ultra-fine sulfoaluminate cement-based grouting materials) was studied with micro-calorimeter, thermal-thermogravimetric (DTA-TG) analysis, scanning electron microscopy and energy spectrum technique (SEM-DES), marsh cone flow time, setting time, compressive strength and expansion/shrinkage tests.
Journal ArticleDOI
Rheological and mechanical properties of microfine-cement-based grouts mixed with microfine fly ash, colloidal nanosilica and superplasticizer
TL;DR: In this paper, a microfine-cement-based grout mixed with microfine fly ash (MFA), colloidal nanosilica (NS) and superplasticizer (SP) was designed to ensure desirable fluidity, less leaching and mechanical properties of grouts in geotechnical engineering.
Journal ArticleDOI
Investigation on fundamental properties of microfine cement and cement-slag grouts
TL;DR: In this article, the properties of six different MC grouts (three portland-based and three slag-blended) and two ordinary Portland cements (ASTM I and III) are measured.
References
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Journal ArticleDOI
Variations in the rheology and penetrability of cement-based grouts—an experimental study
TL;DR: In this article, a number of measurements of grout properties relating to the rheology and penetrability of fresh cement-based grout are presented, and the main purpose of this study is to investigate and describe variations that can be detected when measurements of these grout parameters are carried out repeatedly.
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Injection of Fine Sands with Very Fine Cement Grout
TL;DR: Very fine cement grouts with a water-to-cement ratio as low as two can permeate several feet into well-compacted fine sands with D15 in the range of 0.15 mm.
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Estimating the groutability of granular soils: a new approach
Suat Akbulut,Ahmet Sağlamer +1 more
TL;DR: In this paper, an alternative empirical formula to estimate the groutability of granular soils is presented and supported by experimental results obtained from the grouted sand samples prepared with various relative densities.
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Thixotropic behaviour of cement pastes
TL;DR: In this paper, the thixotropic behavior of fresh Portland cement pastes is examined on the basis of the stress transients determined at constant shear rate, and significant quantities are considered: the difference between maximum and equilibrium shear stresses, the breakdown area and the density of the energy absorbed by material for the breakdown of the structure.
Journal ArticleDOI
Engineering properties of medium-to-fine sands injected with microfine cement grout
TL;DR: In this paper, the authors investigated the penetrability of microfine cement suspensions prepared with Rheocem 900 with and without superplasticizer additive into various graded fine-to-medium sands into which chemical grout permeation is only possible.