Bioreceptivity evaluation of cementitious materials designed to stimulate biological growth

Manso, Sandra; Muynck, Willem De; Segura, Ignacio; Aguado, Antonio; Steppe, Kathy; Boon, Nico; Belie, Nele De

doi:10.1016/j.scitotenv.2014.02.059

Cited by 73 publications

(58 citation statements)

References 27 publications

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“…Webster and Loehr (47) (53) used an L:S ratio of 2.5. Nevertheless, the most widely used ratio was 10, once again varying the procedures that were followed prior to measurement (54)(55)(56)(57)(58).…”

Section: Ph-metersmentioning

confidence: 99%

“…Moreover, the volume of pore solution is low or null depending on the cementitious material. For instance, experiments to try to obtain the pore solution of Ordinary Portland Cement and Magnesium Phosphate Cement mortars by means of this technique were done in previous works (58). However, no pore solution was obtained from any of the Magnesium Phosphate Solution samples and the analysis was not carried out.…”

Section: Selection Criteriamentioning

confidence: 99%

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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-metersmentioning

confidence: 99%

Section: Selection Criteriamentioning

confidence: 99%

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

Manso

Aguado

2017

Mater. construcc.

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“…Artificial ageing has been applied to reduce natural ageing exposure time, as well as to condition the samples with controlled conditions such as the lighting exposure (simulating the day/night time with lamps), the RH conditions (usually 50%) and the temperature (usually around 25°C), thus mirroring the optimal conditions for microorganisms growth [22,28,54,[94][95][96][97]. Several experimental setups have been proposed.…”

Section: Artificial Ageingmentioning

confidence: 99%

“…This setup can be easily adapted to different kinds of samples and to different inoculation solutions. Variations on this setup are proposed by other studies [22,28], in which samples with a 45° slope are required, while approaches developed by Portillo et al [94] and Giannantonio [54] require, respectively, vertical samples where the BG-11 (Blue Green) medium covers up to 0.5 cm of the lowest side of the sample and horizontal samples sprayed with nutrient amendments. Other tests simulating growth conditions at the base of a building trough capillarity are also documented [99].…”

Section: Artificial Ageingmentioning

confidence: 99%

“…A high pH surface is normally correlated with the inhibition of the algal growth, which are pioneer organisms [3]. For instance, Manso et al [28] showed that magnesium phosphate cement (MPC) is more suitable to stimulate colonization compared with ordinary portland cement, which could be mainly attributed to the lower pH of the MPC binder. Furthermore, the presence of living organisms on building surfaces depends on the chemical composition of the specific material, an aspect that will be discussed later.…”

Section: Introductionmentioning

confidence: 99%

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Review on the influence of biological deterioration on the surface properties of building materials: organisms, materials, and methods

Ferrari¹,

Santunione²,

Libbra³

et al. 2015

Int. J. DNE

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A strong attention is recently paid to surface properties of building materials as these allows controlling solar gains of the building envelope and overheating of buildings and urban areas. In this regard, deterioration phenomena due to biological aggression can quickly damage solar-reflecting roof surfaces and thus increase sharply solar gains, discomfort, air-conditioning costs and waterproofing degradation. The same deterioration problem has deleterious effect on cultural heritage, ruining its huge historic and artistic value. This work is aimed at providing an overview on the different organisms that affect the surface of most used building materials, to support the design of new building materials with long-lasting surface properties and to find a way to preserve cultural heritage. Artificial ageing is the long-term aim of this investigation, in which what in nature happens after months or years is compressed in a very short time by forcing the growth of microorganisms through a strict control on the different conditioning factors. Both natural and artificial ageing are eventually outlined in the last part of this work to provide a comprehensive idea of what is necessary to study in a complete way biological ageing protocols on building materials. Several characterization techniques are also introduced to analyse the influence of microorganisms on the surface of different building materials.

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Future Developments and Challenges of Smart and Multifunctional Concrete

Han

Zhang

2017

Smart and Multifunctional Concrete Toward Sustainable Infrastructures

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Bioreceptivity evaluation of cementitious materials designed to stimulate biological growth

Cited by 73 publications

References 27 publications

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

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

Review on the influence of biological deterioration on the surface properties of building materials: organisms, materials, and methods

Future Developments and Challenges of Smart and Multifunctional Concrete

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