Study on some factors affecting the results in the use of MIP method in concrete research

Kumar, Rakesh; Bhattacharjee, Bishwajit

doi:10.1016/s0008-8846(02)00974-2

Cited by 185 publications

(47 citation statements)

References 24 publications

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“…There has been recently some discussion on the effect that different types of drying have on the MIP measurements [16,17]. In this work samples were vacuum dried for 48 hours and then kept in oven at 50ºC.…”

Section: Cosmentioning

confidence: 99%

Use of impedance spectroscopy to determine the displacement of water in cement paste under small loads

Sánchez¹,

Castro²,

Climent³

et al. 2007

WIT Transactions on Engineering Sciences, Vol 57

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The effect of mechanical loading in concrete structures may cause deformation by creeping. The physical origin of this phenomenon is not well known, but water seems to play an essential role in it. Impedance spectroscopy in the high frequency region can detect water movements towards empty pores, even when the applied load is small. In this paper a system for application of mechanical loading compatible with simultaneous impedance spectroscopy measurements is presented. The effect of several parameters (ageing, water to cement ratio, water content) on cement paste samples' performance under mechanical loading is analysed through the corresponding impedance spectra.

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Section: Cosmentioning

confidence: 99%

Use of impedance spectroscopy to determine the displacement of water in cement paste under small loads

Sánchez¹,

Castro²,

Climent³

et al. 2007

WIT Transactions on Engineering Sciences, Vol 57

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“…There are extensive publications reporting the use of MIP (Kumar and Bhattacharjee 2003) and epoxy impregnation techniques (Wong et al 2006), but only a handful of studies (Dullien 1981;Lange et al 1994;Diamond 2000;Nemati 2000;Stroeven et al 2010) have used the metal intrusion/ impregnation technique. The major limitations of the Wood's metal intrusion technique include: (1) the requirement for customized high-pressure chambers and sample holder (Willis et al 1998) to sustain pressure; (2) the difficulty of controlling the pressure, such that customized control units (Lloyd et al 2009) have been needed; (3) the high toxicity of Wood's metal due to its Pb and Cd content (Chen et al 1975;Schubauer-Berigan et al 1993), creating high risk for those involved in the regular handling (grinding and polishing) of samples.…”

Section: Introductionmentioning

confidence: 99%

A new scheme for analysis of pore characteristics using centrifuge driven non-toxic metal intrusion

Chen

Tian

et al. 2016

Geomech. Geophys. Geo-energ. Geo-resour.

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This study investigates the intrusion behavior of a non-toxic low-melting-point metal using centrifugation to develop a better pore characterization technique for cementitious materials such as ordinary Portland cement. This study suggests that centrifugation is a safe and effective method for driving melted low-melting-point alloys into cementitious material at pressure between 12 and 15 MPa. The non-toxic Field's metal alloy is suggested as a replacement for the toxic Wood's metal. For pores between 100 nm and 10 lm, Field's metal can be used without vacuuming the sample before intrusion. For pores [10 lm, pre-vacuuming of the sample is suggested to prevent the extrusion of hardened Field's metal from large pores. Different failure modes for the extrusion phenomenon were analyzed and the results suggest that weak bonding between the Field's metal and the cement matrix is the main cause for the extrusion. The new scheme may also be applicable to porous geomechanical materials such as porous rock, sand and clay.

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“…Corrosion of reinforcement in mortars demerits its durability due to the damages caused by the corrosion products in the cement matrix [1,2], being that the use of steel as reinforcement leads to risks of corrosion, the pore solution of mortar can transport aggressive ions, such as chlorides, up to the reinforcement, decreasing the durability [3,4]. In various investigations OPC has been replaced with different types of ash in order to provide durability to mortars, such as: RHA [5,6], cane bagasse ash, fly ash, blast furnace ash, among others, improving mechanical, physical, chemical and electrochemical properties and contributing to diminish the effect of corrosion of reinforcement in various noxious environments [7].…”

Section: Introductionmentioning

confidence: 99%

Chloride Penetration in mortars with replacements of rice husk Ash and nano-SiO2

Almeraya‐Calderón¹,

Fajardo-San-Miguel²,

Martínez‐Villafañe³

2013

IOSRJEN

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-Ashes and nanoparticles (NP) have been incorporated individually in mortars to improve its macrostructure and microstructure. However, regarding the simultaneous use of ashes and NP there are few reports addressing the study of resistance to corrosion. It was evaluated in this work the mechanical, physical and electrochemical performance in mortars with plastic consistency according to ASTM C 1437-99, replacement of ordinary Portland cement (OPC) by rice husk ash (RHA) and nano Silica Oxide (nSO), conducting studies of mechanical resistance to simple compression, porosity, superficial absorption, rapid chloride penetration test (RCPT) and accelerated corrosion in mortars with replacements of OPC of 1.0% of nSO and 20.0% of RHA. According to results, the simultaneous use of nSO + RHA has a higher performance in the properties of mortars with decreases in porosity and total charge passed of 3.9% and 75.6%, and increase in compressive strength, and corrosion of 7.1% and 37.6 %, respectively. Mortars of plastic consistency with replacement of OPC by RHA and nSO in simultaneous use count with higher performance in their physical, mechanical and electrochemical properties than in individual use of RHA and nSO.

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Study on some factors affecting the results in the use of MIP method in concrete research

Cited by 185 publications

References 24 publications

Use of impedance spectroscopy to determine the displacement of water in cement paste under small loads

Use of impedance spectroscopy to determine the displacement of water in cement paste under small loads

A new scheme for analysis of pore characteristics using centrifuge driven non-toxic metal intrusion

Chloride Penetration in mortars with replacements of rice husk Ash and nano-SiO2

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