The use of raw and calcined diatomite in cement production

Yılmaz, Bülent; Ediz, Nezahat

doi:10.1016/j.cemconcomp.2007.08.003

Cited by 134 publications

(68 citation statements)

References 26 publications

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“…A disadvantage of the use of diatomite in the production of mortar and concrete is the need of a high amount water, due to diatomite high porosity, which promotes a reduction in the mechanical strength (17,18).…”

Section: Introductionmentioning

confidence: 99%

Effect of pozzolans with different physical and chemical characteristics on concrete properties

Paiva¹,

Velosa²,

Cachim³

et al. 2016

Mater. construcc.

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ABSTRACT:The durability of concrete structures is an important issue nowadays. Specifically in the case of reinforced concrete bridges or other infrastructures one of the main form of environmental attack is the penetration of chloride ions, which leads to corrosion of concrete steel reinforcement.This study aims to evaluate the effect of the introduction of metakaolin and diatomite, two chemically and physically different pozzolans, on the resistance of concrete to the penetration of chlorides but also the effect on other properties of concrete, namely, its compressive strength and its porosity distribution.The results of this study show that the pozzolans physical and chemical characteristics have a strong influence on the pozzolans behavior and, consequently, on the concrete properties. RESUMEN: Efecto de puzolanas con características físicas y químicas diferentes sobre las propiedades del hormigón.La durabilidad de las estructuras de hormigón es un tema importante hoy en día. En concreto, en el caso de los puentes de hormigón armado u otras infraestructuras, el principal factor de agresión medioambiental es la penetración de iones cloruro, lo que conduce a la corrosion del acero de refuerzo del hormigón. Este estudio tiene como objetivo evaluar el efecto de la introducción de metacaolín y diatomita, dos puzolanas química y físicamente diferentes, sobre la resistencia del hormigón a la penetración de cloruros, y también sobre otras de sus propiedades como la distribución de su porosidad o su resistencia a compresión.Los resultados de este estudio muestran que las características fisicoquímicas de las puzolanas tienen una fuerte influencia en su comportamiento y en consecuencia, en las propiedades del hormigón.

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Section: Introductionmentioning

confidence: 99%

Effect of pozzolans with different physical and chemical characteristics on concrete properties

Paiva¹,

Velosa²,

Cachim³

et al. 2016

Mater. construcc.

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“…Standard cement test results indicate the water demand and the setting times of the pastes were related to diatomite ratio [6] Calcination changed the porous structure of diatomite and rendered the grindability easier providing it to be used as a cement addition and suggested its use with substitution rate higher than 20 wt. % in this work [7].…”

Section: Introductionmentioning

confidence: 91%

Natural and Calcined Clayey Diatomite as Cement Replacement Materials: Microstructure and Pore Structure Study

Janotka¹,

Uhlík²

2014

IJRET

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“…Figure 12: SEM image of diatomaceous earth (DE) (Mejía, de Gutiérrez, & Montes, 2016) Because of its unique morphology, porous structure and high water absorption level, DE is excepted to influence properties of concrete especially its fresh properties ( Ediz (Yılmaz & Ediz, 2008) found that replacement levels up to 10% show comparable compressive strength compare to control samples, while samples with higher DE content show a significant drop in strength. On the other hand, studies by Aydin and Gül (Aydin & Gül, 2007) and Degirmenci and Yilmaz (Degirmenci & Yilmaz, 2009) showed that for all replacement levels and all measured ages module of elasticity and compressive and flexural strength were lower than control samples.…”

Section: Equipment and Testing Methodsmentioning

confidence: 99%

“…higher zeta potential). It in turn accelerates formation of hydration products and shortens setting times (Nägele, 1985;Plank & Hirsch, 2007;Yılmaz & Ediz, 2008). Kastis et al (Kastis et al, 2006) pointed out that the pozzolanic nature of diatomite can form higher amounts of hydration products in paste.…”

Section: Isothermal Calorimetrymentioning

confidence: 99%

“…For the pastes with DE replacement, the viscosity may dominate the flow diameter. It should be pointed out that, due to its high water demand, paste D10-0.4 exhibited very poor workability, (Agullo, Toralles-Carbonari, Gettu, & Aguado, 1999;Degirmenci & Yilmaz, 2009;Fragoulis et al, 2005;Miller et al, 2010;Stamatakis et al, 2003;Yılmaz & Ediz, 2008), and implementing rheological and mini-cone slump tests were not feasible for this cement paste.…”

Section: Raw Materialsmentioning

confidence: 99%

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Testing and modeling of the thixotropic behavior of cementitous materials.

Hasanzadeh¹

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The use of raw and calcined diatomite in cement production

Cited by 134 publications

References 26 publications

Effect of pozzolans with different physical and chemical characteristics on concrete properties

Effect of pozzolans with different physical and chemical characteristics on concrete properties

Natural and Calcined Clayey Diatomite as Cement Replacement Materials: Microstructure and Pore Structure Study

Testing and modeling of the thixotropic behavior of cementitous materials.

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