Influence of volcanic originated natural materials as additives on the setting time and some mechanical properties of concrete

Aydın, Abdulkadir Cüneyt; Gül, Rüstem

doi:10.1016/j.conbuildmat.2006.02.011

Cited by 74 publications

(32 citation statements)

References 6 publications

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“…Moreover, when weights of the structures are considered, not only natural light weight aggregates but also artificial light materials, such as gas concrete, are used. Incorporation of natural/artificial resources in concrete brings environmental, economic and/or technological benefits Aydın et al 2006Aydın et al , 2007Aydın et al , 2008Aydın et al , 2010Aydın & Gül 2007;Düzgün et al 2005;Tortum et al 2005;Oguz & Aydın 2003;Hasar et al 2009Hasar et al , 2010Türkmen et al 2010).…”

Section: Introductionmentioning

confidence: 93%

The effect of fly ash to self-compactability of pumice aggregate lightweight concrete

Kurt

Aydın

Gül

et al. 2015

Sadhana

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This paper presents the results of an experimental study on the effects of fly ash, different water/(cement + mineral additive) ratios and pumice aggregates to some physical and mechanical properties of self-compacting lightweight aggregate concrete. In this study, pumice had been used as lightweight aggregates. Several properties of self-compacting pumice aggregate lightweight concretes like the unit weight, flow diameter, T50 time, flow diameter after an hour, V-funnel time, and L-box tests, 7, 28, 90 and 180-day compressive strength, 28-day splitting tensile strength, dry unit weight, water absorption, thermal conductivity and ultrasonic pulse velocity tests were investigated. For this purpose, 18 series of concrete samples were prepared in two groups. Pumice aggregate was used as a replacement of natural aggregate, at the levels of 0, 20, 40, 60, 80, and 100% by volume. Furthermore, a second series of 100% pumice aggregate was used for the production of self-compacting lightweight aggregate concrete with constant w/(c+m) ratios as 0.35, 0.40, and 0.45 by weight. The flow diameters, T50 times, paste volumes, 28-day compressive strengths, dry unit weights and thermal conductivities of self-compacting lightweight aggregate concrete were obtained in the range of 600-800 mm, 2-8 s, 471-572 lt/m 3 , 9.2-53.26 MPa, 839-2156 kg/m 3 and 0.321-1.508 W/mk, respectively, which satisfies not only * For correspondence 1343 1344 Murat Kurt et al the strength requirement of semi-structural lightweight concrete but also the flowing ability requirements and thermal conductivity requirements of self-compacting lightweight aggregate concrete.

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Section: Introductionmentioning

confidence: 93%

The effect of fly ash to self-compactability of pumice aggregate lightweight concrete

Kurt

Aydın

Gül

et al. 2015

Sadhana

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“…The hydraulic and pozzolanic activity of silica mineral additions depends on its crystalline or amorphous state as well as on its size and particle shape (15). Some authors have shown that the use of diatomite in the production of mortar and concrete does not improve its mechanical properties (14,16).…”

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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“…Aruntaş (1996) proposed that diatomite reserves of Ankara and Çankırı, Turkey, could be used as puzzolanic additive in cement production at the ratios of 10 and 20%, but stated that diatomite addition decreased compressive and tensile strength while it increased sulfate resistance in cementitious systems. Aydın and Gül (2006) determined that when diatomite was added to cement in concrete production, as the diatomite ratio increased the initial setting and setting duration of concrete increased. Ünal et al (2005) investigated physical and mechanical properties of lightweight concretes produced with diatomite aggregates.…”

Section: The Use Of Diatomite In the Construction Industrymentioning

confidence: 99%

Use of diatomite in the production of lightweight building elements with cement as binder

Gökçe¹

2012

Sci. Res. Essays

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Diatomite is currently being used as raw material in various industrial sectors worldwide and is also in use in the construction industry, aimed at improving characteristics of concrete and cement, and in producing heat-insulating bricks, using various binders. In this study, usage of cement as a binder, in producing diatomite-based lightweight building elements, was investigated. Diatomite rocks were ground and sifted through sieves with square-shaped apertures of 500 µ µ µ µm then blended with cement at ratios of 10, 20, 30 and 40% by volume. The mixtures were kneaded to plastic consistency by adding water and were placed into the moulds to obtain test sample cubes of 100 × 100 × 100 mm in dimensions. Compressive strengths and ultrasonic sound transmission values of samples were determined as basic evaluation criteria. The samples were observed to have gained strength compared to the strengths of the samples of 7 days age at the end of 28 days curing period, and no visible deformations were determined for the first 50 days. However, as the age of the samples proceeded, the samples displayed decreases in their compressive strengths due to formations of capillary fractures that expanded gradually. Finally, at the age of 150 days, non-negligible mass losses developed in the samples. These loses were thought to have sourced from the alkali aggregate reaction that took place between cement and silica constituent of diatomite. Consequently, it was concluded that it is not convenient to use cement as a binding agent in the production of diatomite-based lightweight building elements.

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Influence of volcanic originated natural materials as additives on the setting time and some mechanical properties of concrete

Cited by 74 publications

References 6 publications

The effect of fly ash to self-compactability of pumice aggregate lightweight concrete

The effect of fly ash to self-compactability of pumice aggregate lightweight concrete

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

Use of diatomite in the production of lightweight building elements with cement as binder

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