Setting time: An important criterion to determine the length of the delay period before steam curing of concrete

Erdem, Tahir Kemal; Turanlı, Lütfullah; Erdoğan, Turhan Y

doi:10.1016/s0008-8846(02)01058-x

Cited by 82 publications

(25 citation statements)

References 9 publications

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“…The most important improvement is product ready for use within 24 h (the strength is generally equivalent to 28 days under ambient curing). However, this curing method alters the properties of the resulting concrete (American Concrete Institute 1963;Boukendakdji, Brooks and Wainwright, 1996;Ho, Chua & Tam, 2003;Erdem, Turanli & Erdogan, 2003). Although plenty information is already available on the effect of steam curing on conventional concrete properties, there is limited data relating with steam cured concrete pavement blocks prepared with fly ash.…”

Section: Description Of Problemmentioning

confidence: 99%

“…Rapid curing techniques are widely used in the production of pre-cast concrete pavement blocks because it accelerates the rate of strength development (Topcu and Uygunoglu, 2007). Some pre-cast concrete plants apply steam curing immediately after casting the elements in the formwork in order to speed up the production rate (Erdem, Turanli & Erdogan, 2003). Steam curing is a heat treatment which has been used for many years to accelerate the strength development of concrete products.…”

Section: Introductionmentioning

confidence: 99%

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Comparison of properties of prefabricated interlocking pavement blocks cured at different conditions

Uygunoğlu

2016

Revista de la Construcción

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In this study, influence of curing condition and fly ash content on properties of pre-fabricated concrete interlocking blocks (PCIBs) were investigated. The blocks were produced with crushed sand stone (fine) and crushed stone (coarse) as aggregate. Also, fly ash was added to mixtures in different ratio by replacing the cement from 0 to 30%. PCIBs were cured in three different types as steam cure, water-pool cure and wet cure. Compressive strength, tensile splitting strength, density, apparent porosity, water absorption by weight and abrasion resistance of PCIBs was determined. When comparing the PCIBs, the use of wet cure results in lower physical and mechanical properties after 28 days. By contrast, waterpool and steam cure gives better result on mechanical and physical properties. Also, replacement of cement with fly ash (from 10% to 20%) has a significant effect in increasing important properties of PCIBs.Keywords: Curing; pavement blocks; prefabricated; strength; mineral admixture. ResumenEn este estudio, la influencia de la curación de la condición y el contenido de cenizas volantes sobre las propiedades del hormigón prefabricado Bloques entrelazados (PCIBs) fueron investigados. Los bloques fueron producidos con arena de piedra triturada (fina) y piedra triturada (grueso) como agregado. Además, cenizas fueron añadidas a las mezclas en diferente relación, reemplazando el cemento desde 0 a 30%. Los PCIBs fueron curados en tres tipos diferentes como: cura de vapor, piscina de agua cura y cura húmeda. Resistencia a la compresión, resistencia a la tracción indirecta, densidad, porosidad aparente, absorción de agua por el peso y la resistencia a la abrasión de PCIBs fue determinadas. Cuando se comparan los PCIBs, el uso de la cura húmeda se traduce en la reducción de propiedades físicas y mecánicas, después de 28 días. Por el contrario, la piscina de agua y vapor cura da mejor resultado en las propiedades mecánicas y físicas. Además, la sustitución de cemento con ceniza volante (del 10% al 20%) tiene un efecto significativo en el aumento de propiedades importantes de PCIBs.Palabras Claves: curado; bloques de pavimento; prefabricado; fuerza; adición mineral.

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Section: Description Of Problemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comparison of properties of prefabricated interlocking pavement blocks cured at different conditions

Uygunoğlu

2016

Revista de la Construcción

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“…For steam curing, the advantages are also offset by durability issues associated with the delayed formation of expansive minerals within the material [31][32][33]. In addition, the process can suffer from non-uniform hydration of the cement clinker, resulting from temperature gradients within the material due to inherent thermal insulation effects [34].…”

Section: Accelerated Curingmentioning

confidence: 99%

Microwave processing of cement and concrete materials – towards an industrial reality?

Buttress

Jones

Kingman

2015

Cement and Concrete Research

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Each year a substantial body of literature is published on the use of microwaves to process cement and concrete materials. Yet to date, very few if any have lead the realisation of a commercial scale industrial system and is the context under which this review has been undertaken.The state-of the-art is evaluated for opportunities, and the key barriers to the development of new microwave-based processing techniques to enhance production, processing and recycling of cement and concrete materials. Applications reviewed include pyro-processing of cement clinker; accelerated curing, non-destructive testing and evaluation (NDT&E), and end-of-life processing including radionuclide decontamination.

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“…For precast prestressed concrete industry, method of steam curing is widely applied to concrete members made of Type I cement on behalf of the massive production and accelerated production rate in response to demand (Erdoǧdu and Kurbetci 1998;Erdem et al 2003;Hanson 1963;Higginson 1961).…”

Section: Introductionmentioning

confidence: 99%

Modeling of Compressive Strength Development of High-Early-Strength-Concrete at Different Curing Temperatures

Lee

Nguyen

2016

Int J Concr Struct Mater

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High-early-strength-concrete (HESC) made of Type III cement reaches approximately 50-70 % of its design compressive strength in a day in ambient conditions. Experimental investigations were made in this study to observe the effects of temperature, curing time and concrete strength on the accelerated development of compressive strength in HESC. A total of 210 HESC cylinders of 100 9 200 mm were tested for different compressive strengths (30, 40 and 50 MPa) and different curing regimes (with maximum temperatures of 20, 30, 40, 50 and 60°C) at different equivalent ages (9, 12, 18, 24, 36, 100 and 168 h). From a series of regression analyses, a generalized rate-constant model was presented for the prediction of the compressive strength of HESC at an early age for its future application in precast prestressed units with savings in steam supply. The average and standard deviation of the ratios of the predictions to the test results were 0.97 and 0.22, respectively.Keywords: high-early-strength concrete, compressive strength, curing temperature. Age at the start of strength development at the reference temperature List of symbols

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Setting time: An important criterion to determine the length of the delay period before steam curing of concrete

Cited by 82 publications

References 9 publications

Comparison of properties of prefabricated interlocking pavement blocks cured at different conditions

Comparison of properties of prefabricated interlocking pavement blocks cured at different conditions

Microwave processing of cement and concrete materials – towards an industrial reality?

Modeling of Compressive Strength Development of High-Early-Strength-Concrete at Different Curing Temperatures

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