Calcareous fillers and the compressive strength of portland cement

Soroka, I.; Stern, Noa

doi:10.1016/0008-8846(76)90099-5

Cited by 129 publications

(42 citation statements)

References 3 publications

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“…However, concerning the calcareous filler, the maximum heat of hydration is reached earlier (around 14 h). This hydration acceleration using filler has been reported in literature [87]. This accelerated hydration is explained by the nucleation sites provided by filler addition for C-S-H growth [58,88].…”

Section: Semi-adiabatic Calorimetrysupporting

confidence: 76%

Ability of Two Dam Fine-Grained Sediments to be Used in Cement Industry as Raw Material for Clinker Production and as Pozzolanic Additional Constituent of Portland-Composite Cement

Faure

Smith

Coudray

et al. 2017

Waste Biomass Valor

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other one is calcined in the range 550-1000 °C aiming to obtain a pozzolanic reactive material that could be used as supplementary cementitious material in blended Portland cement. After thermal treatments, the products are characterized and compared to ordinary Portland cement (OPC) and to pozzolanic active materials (fly ash from pulverized-coal power plant). Results showed that each sediment is suitable for the only tested reuse option. For the clinker prepared with SEP sediment, the morphology and the mineralogical composition correspond to those of a typical Portland clinker. Concerning calcined STA pozzolanic activity, the optimum thermal treatment was found to be 900 °C using the chemical Frattini test. Similar compressive strength results were obtained with calcined STA and silico-aluminous fly ash.Abstract Fine-grained sediment deposition is a phenomenon that occurs at different extents in all the reservoirs. This particle accumulation has to be properly managed, in accordance with the operational needs and the environment. As an extracted and on-land managed sediment has to be considered as a waste material according to both European and French regulations, sustainable reuse options need to be investigated. One of them could be a beneficial reuse as a raw material in cement industry either as partial substitution in Portland clinker raw mix or as a supplementary cementitious material (SCM) after thermal treatment in order to activate its possible pozzolanic activity. Two dredged materials, labelled SEP and STA, both from French hydroelectric reservoirs, are characterized on physical, chemical and mineralogical aspects. SEP is used as raw material partial replacement for clinker synthesis and the The original version of this article was revised due to a retrospective Open Access order.

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Section: Semi-adiabatic Calorimetrysupporting

confidence: 76%

Ability of Two Dam Fine-Grained Sediments to be Used in Cement Industry as Raw Material for Clinker Production and as Pozzolanic Additional Constituent of Portland-Composite Cement

Faure

Smith

Coudray

et al. 2017

Waste Biomass Valor

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“…Some authors consider the effect of limestone on cement to be only physical, taking into account the increase in strength (42).…”

Section: Hardened State Propertiesmentioning

confidence: 99%

Lime mud from cellulose industry as raw material in cement mortars

Modolo¹,

Senff²,

Labrincha³

et al. 2014

Mater. construcc.

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ABSTRACT:This study reports the use of lime mud (LM) in cement-based-mortars. Lime mud is a waste generated in the production of cellulose by the kraft mill process. It is mainly composed of CaCO 3 , a small amount of magnesium carbonate and other trace minerals. Mortars were prepared by adding different amounts of LM (10, 20 and 30% by weight of cement) in dry weight. The mortar compositions were evaluated through rheology and flow table measurements, assuring that all the samples exhibited adequate conditions for testing in both equipments. The hardened state properties were also evaluated through mechanical strengths at 7, 28 and 90 days of curing. Following a waste management solution perspective, this work intend to provide a general evaluation of LM application in cement based mortars, looking at both fresh and hardened properties in order to guarantee that the final application requirements are not hindered. RESUMEN: Lodo de carbonato de la industria de celulosa como materia prima en las morteros de cemento.Este estudio revela el uso de lodo de carbonato (LM) en morteros de cemento. El LM es un residuo compuesto principalmente por CaCO 3 generado en la producción de pasta de papel por el método Kraft. Los morteros se prepararon a partir de la adición de diferentes niveles de LM (10, 20 y 30% en peso de cemento) en peso seco. Las composiciones de los morteros fueron caracterizadas através de mediciones de reología de mesa y de flujo, asegurando que las muestras exhibían condiciones adecuadas para su caracterización en ambos equipamientos. Las propiedades en estado endurecido también se evaluaron através de resistencias mecánicas a los 7, 28 y 90 días de cura. Con objeto de gestión de residuos, este trabajo tiene la intención de proporcionar una visión general de la aplicación de LM en los morteros, haciendo hincapié en las propiedades con el fin de garantizar que los requisitos para su aplicación final no se vean obstaculizados.

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“…A partir de los resultados obtenidos tras el análisis mineralógico realizado por DRX, lo anteriormente expuesto se puede justificar por la formación de carboaluminatos en las mezclas, como consecuencia de la reacción del C3A del cemento anhidro con el carbonato de bario. Es conocido en bibliografía que la formación de monocarboaluminatos va asociada a incrementos en las resistencias mecánicas (7). Este incremento podría compensar la esperada pér-dida de resistencias que tendrían las pastas con altos contenidos en BaCOg, ya que éstas tienen menor cantidad de silicatos calcicos hidratados.…”

Section: Análisis Por Drxunclassified

Influencia de la adición del BaCO<sub>3</sub> sobre la hidratación del cemento portland

Dumitru¹,

Vázquez²,

Puertas³

et al. 1999

Mater. construcc.

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INTRODUCCIÓNEn un estudio previo ( 1 ) se ha comprobado que el BaCOg retarda la reacción de hidratación del C3A de modo similar al producido en presencia del CaC03(2-3). En ese mismo trabajo se ha puesto en evidencia que la composición mineralógica de los productos de hidratación del C3A en presencia de BaC03, tienen una peculiaridad específica, que se manifiesta por la formación de un hemicarboaluminato, de fórmula CgA2cH24. En la composición de este hemicarboaluminato ha sido identificado un 6% de Ba. En presencia de yeso, el BaCOg acelera la reacción de hidratación del C3A. El BaCOj inhibe la formación de ettringita, ya que precipita la sal insoluble BaSO^.En el presente trabajo el objetivo planteado ha sido conocer la influencia que puede ejercer el BaCOg en el proceso de hidratación del cemento portland. PARTE EXPERIMENTAL MetodologíaSe partió de dos clínkeres de cemento portland, uno de ellos bajo en C3A (denominado B) y otro alto en C3A

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Calcareous fillers and the compressive strength of portland cement

Cited by 129 publications

References 3 publications

Ability of Two Dam Fine-Grained Sediments to be Used in Cement Industry as Raw Material for Clinker Production and as Pozzolanic Additional Constituent of Portland-Composite Cement

Ability of Two Dam Fine-Grained Sediments to be Used in Cement Industry as Raw Material for Clinker Production and as Pozzolanic Additional Constituent of Portland-Composite Cement

Lime mud from cellulose industry as raw material in cement mortars

Influencia de la adición del BaCO<sub>3</sub> sobre la hidratación del cemento portland

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