Performance of pfa concrete in a marine environment––10-year results

Thomas, M D; Matthews, John D.

doi:10.1016/s0958-9465(02)00117-8

Cited by 160 publications

(67 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Generally, the migration coefficients showed by mortars with additions were lower for all studied conditions in comparison with those noted for CEM I mortars. This would agree with several studies [12,15,23,24], which have pointed out that using slag and fly ash cements brings a noticeable improvement in chloride ingress resistance. Firstly, this could be explained in relation to the higher refinement of pore network provided by fly ash and slag in comparison with pure clinker [7][8][9]14,15].…”

Section: Forced Chloride Migration Resultssupporting

confidence: 93%

“…In this regard, there are not too many experimental works where slag and fly ash cement-based materials had been hardened under real in-situ environments [12,13,[19][20][21][22][23][24][25][26] and considering their results, those materials showed different behaviour as a function of the climate characteristics of the place in which the specimens were located, although the majority of them coincide in the fact that the use of both additions is particularly adequate for marine structures [13,23,27,28].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effects of Environment in the Microstructure and Properties of Sustainable Mortars with Fly Ash and Slag after a 5-Year Exposure Period

et al. 2018

View full text Add to dashboard Cite

Nowadays, getting a more environmentally sustainable cement production is one of the main goals of the cement industry. In this regard, the use of active additions, like fly ash and ground granulated blast-furnace slag, has become very popular. The behaviour, in the short-term, of cement-based materials with those additions is well-known when their hardening is produced under optimum conditions. However, real structures are exposed to different environments during long periods, which could affect the development of microstructures and the service properties of cementitious materials. The objective of this work is to analyse the effects in the long-term (up to 5 years approximately) produced by the exposure to different non-optimum laboratory conditions in the microstructure, mechanical and durability properties of mortars made with slag and fly ash commercial cements. Their performance was compared to that observed for ordinary Portland cement (OPC) mortars. The microstructure has been analysed using mercury intrusion porosimetry. The effective porosity, the capillary suction coefficient, the chloride migration coefficient and mechanical strengths were analysed too. According to the results, mortars prepared using slag and fly ash sustainable commercial cements, exposed to non-optimum conditions, show a good performance after 5-years hardening period, similar or even better than OPC mortars.

show abstract

Section: Forced Chloride Migration Resultssupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Effects of Environment in the Microstructure and Properties of Sustainable Mortars with Fly Ash and Slag after a 5-Year Exposure Period

et al. 2018

View full text Add to dashboard Cite

show abstract

“…In the particular case of CEM III, their better behaviour against chloride ingress could be related to the possible formation of Friedel's salt, because this cement has a higher content of Al 2 O 3 from the slag. Furthermore, other researches (1,(34)(35)(36) Figure 10. Results of non-steady-state chloride migration coefficient for environment A.…”

Section: Migración Forzada De Clorurosmentioning

confidence: 99%

Influencia de diferentes condiciones de curado en la estructura porosa y en las propiedades a edades tempranas de morteros que contienen ceniza volante y escoria de alto horno

Ortega¹,

Sánchez²,

Climent³

2012

Mater. construcc.

View full text Add to dashboard Cite

In this work, the evolution of the microstructure, durability properties and mechanical strength of mortars made with commercial cements, which contain fly ash (between 21% and 35%) and ground granulated blast-furnace slag (between 66% and 80%), were studied. These mortars were exposed to three different environments during their hardening, an optimum laboratory condition, and two environments representing a mild Atlantic climate and a Mediterranean climate, respectively. As a reference, ordinary Portland cement mortars were also tested. The microstructure was characterized using mercury intrusion porosimetry. Regarding durability, the capillary suction coefficient and non-steady-state chloride migration coefficient were determined. Compressive strength was studied too. The tests were performed at 7, 28 and 90 days. The main conclusion of this work is that cements with slag and fly ash hardened under environmental conditions of Atlantic and Mediterranean climates, can develop good service properties after three months of hardening.

show abstract

“…At the same time, there are new sustainable technologies being developed for the purpose of the recycling of fresh concrete waste [7], where even fresh concrete waste with a high content of calcium silicate was classified as a cement paste and used as a medium capturing CO 2 [8], similar to the use of sludge from waste water treatment plants [9]. The use of some types of waste waters and industrial waste materials in the concrete production sector has already been proven in the past [10][11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

The Utilization of Waste Water from a Concrete Plant in the Production of Cement Composites

et al. 2017

View full text Add to dashboard Cite

This article presents the results of a study dealing with the utilization of sludge water from a concrete plant as a partial replacement for mixing water in the production of cement composites. The replacement of mixing water with sludge water from a concrete plant was carried out in the amounts of 20% and 50%. The following tests were carried out in order to determine the effect of the replacement of mixing water with sludge water from a concrete plant on the physical and mechanical properties of the cement composites: cement mortar consistency, beginning and end of setting, strength characteristics (compressive strength and flexural strength), and thermal properties.The measured values of the strength characteristics of the test specimens after 28 days of age confirm the possibility of replacing mixing water with sludge water from a concrete plant without significantly reducing the compressive and flexural strength.

show abstract

Performance of pfa concrete in a marine environment––10-year results

Cited by 160 publications

References 6 publications

Effects of Environment in the Microstructure and Properties of Sustainable Mortars with Fly Ash and Slag after a 5-Year Exposure Period

Effects of Environment in the Microstructure and Properties of Sustainable Mortars with Fly Ash and Slag after a 5-Year Exposure Period

Influencia de diferentes condiciones de curado en la estructura porosa y en las propiedades a edades tempranas de morteros que contienen ceniza volante y escoria de alto horno

The Utilization of Waste Water from a Concrete Plant in the Production of Cement Composites

Contact Info

Product

Resources

About