The suitability of a supersulfated cement for nuclear waste immobilisation

Collier, N.C.; Milestone, Neil B.; Gordon, Laura; Ko, Suz-Chung

doi:10.1016/j.jnucmat.2014.05.078

Cited by 30 publications

(9 citation statements)

References 25 publications

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“…The literature lists a wide range of pressures applied to cement pastes and mortars to obtain a suitable amount of pore solution for the test procedure. Accordingly, the pressures applied to cement pastes varied between 345 MPa and 560 MPa, although it was not specified by all of the authors (33)(34)(35)(36). Similar figures may be observed in the literature on the pressures applied to obtain pore solutions from mortars, which generally ranged between 200 MPa and 1,100 MPa (37)(38)(39)(40)(41).…”

Section: Ph-meterssupporting

confidence: 56%

A review of sample preparation and its influence on pH determination in concrete samples

Manso

Aguado

2017

Mater. construcc.

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SUMMARY:If we are to monitor the chemical processes in cementitious materials, then pH assays in the pore solutions of cement pastes, mortars, and concretes are of key importance. However, there is no standard method that regulates the sample-preparation method for pH determination. The state-of-the-art of different methods for pH determination in cementitious materials is presented in this paper and the influence of sample preparation in each case. Moreover, an experimental campaign compares three different techniques for pH determination. Its results contribute to establishing a basic criterion to help researchers select the most suitable method, depending on the purpose of the research. A simple tool is described for selecting the easiest and the most economic pH determination method, depending on the objective; especially for researchers and those with limited experience in this field. RESUMEN:Revisión sobre la preparación de muestras de hormigón y su influencia sobre la determinación del pH. Determinar el pH de la fase acuosa de los poros de pastas de cemento, morteros y hormigones tiene gran importancia en el monitoreo de los procesos químicos que tienen lugar en los materiales cementiceos. Sin embargo, no existe una normativa que regule el método de preparación de la muestra para la determinación de su pH. Este artículo presenta un estado del conocimiento de diferentes metodologías para la determinación del pH de materiales cementiceos y la influencia del método de preparación según el objetivo. Además, se presenta una campaña experimental comparando tres técnicas diferentes. Dicha campaña contribuye a establecer un criterio simple que ayude al investigador en la selección del método más adecuado dependiendo del objeto de studio. Este artículo tiene por objetivo ser una herramienta sencilla para seleccionar la metodología más fácil y económica para determiner el pH dependiendo del objetivo, especialmente para investigadores noveles o aquellos con escasa experiencia.

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Section: Ph-meterssupporting

confidence: 56%

A review of sample preparation and its influence on pH determination in concrete samples

Manso

Aguado

2017

Mater. construcc.

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“…Despite the significantly less content of C 3 A in the ternary samples, the quantities of these hydration products appeared to be similar to those in OPC; however, it is not surprising because a large quantities of ettringite or monosulfate could be produced from the triple combination of GGFBS, Ca(OH) 2 , and gypsum (or CaSO 4 ), even in the case of no C 3 A such as supersulfated slag cements [27].…”

Section: Phasementioning

confidence: 79%

Microstructural verification of the strength performance of ternary blended cement systems with high volumes of fly ash and GGBFS

Jeong

Park

Jun

et al. 2015

Construction and Building Materials

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“…Formation of ettringite is considered to be desirable for nuclear waste encapsulation via cementation, as its large unit cell accommodates a high content of bound water, leaving less free water in the pore network available for radiolysis [10]. Radiolysis of free water compromises the integrity of a solid cement wasteform as it causes formation of cracks and open pores [11].…”

Section: Introductionmentioning

confidence: 99%