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Temperature reduction during concrete hydration in

PDF Mass Concrete Thermal Control

Mass Concrete Hydration • Significant heat is generated in the first few and mix temperature (prior to, during and after concrete placement) • Control measures should be evaluated temperature reduction • Chipped or shaved ice: about 15°F to 20°F (75% subs.) temperature reduction

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Modeling adiabatic temperature rise during concrete

Modeling adiabatic temperature rise during concrete hydration: A data mining approach Alexandre G. Evsukoff a,*, Eduardo M.R. Fairbairn a,E´tore F. Faria b, Marcos M. Silvoso a, Romildo D. Toledo Filho a a Department of Civil Engineering, COPPE/Universidade Federal do Rio de Janeiro, P.O. Box 68506, 21945-970 Rio de Janeiro RJ, Brazil b Department of Civil Engineering, Furnas Centrais Ele

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Methods of Curing Concrete - Curing types and Techniques

See Also: Maturity of Concrete Definition: Curing can be described as keeping the concrete moist and warm enough so that the hydration of cement can continue. More elaborately, it can be described as the process of maintaining a satisfactory moisture content and a favorable temperature in concrete during the period immediately following placement, so that hydration of cement may

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Guidelines for Curing and Sealing Concrete – Kuhlman

Temperature greatly affects hydration. While hot weather can make concrete harden and gain strength faster, it ultimately leads to a weaker concrete than one which has been kept cool (50 to 70 degrees Fahrenheit) during its first few days. The goal is to keep concrete cool and moist so it gains strength slowly, but efficiently.

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Effects of Confinement on Reaction‐Induced Fracturing

The equilibrium temperature of the dehydration reaction of brucite to form periclase is ~550 °C at 1 atm pressure (Johnson & Walker, 1993). The kinetics of this reaction have been studied experimentally (Liu et al., 2017 ) and follow an Avrami-type sigmoidal kinetics (Avrami, 1939 ) at temperatures between 320 to 360 °C and pressures ranging

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PDF A Study on the Reduction in Hydration Heat and Thermal

concrete mixture [3,4]. Some special methods are required to control the temperatures during cement hydration. Therefore, some actions should be performed before, during, and after concrete placement to prevent the heat of hydration formation emanating from the center to the surface of the concrete [5].

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Using Chilled Water or Ice to Slow the Cement Hydration

The heat produced by concrete during concrete curing is called heat of hydration. This is a reaction that occurs when water and cement react. The success of many hot-weather concreting operations depends on the steps taken to slow the cement hydration reaction within the concrete. An important way to accomplish this during hot weather is []

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Will Extreme Heat Damage Your Concrete? - Davis Concrete

The main concern during this process is how the heat will affect the temperature of the concrete. If the setting time does not take place as it should, then the strength of the concrete is lowered. When the temperature is super-hot, the cement will hydrate, sucking up the water and crystals will grow around the aggregate particles in a rapid

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Problems with Concrete in Cold Weather - What's New! | The

Retain the concrete's body temperature: By insulating the forms or covering the concrete with adequate insulation, heat can be retained in the concrete and sustain the hydration reaction so that the concrete can achieve adequate strength. Provide an incubator: The temperature of the concrete is related to the temperature of its surroundings

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Possibilities of Regulation of Temperature in Concrete

Paper is focused on development of hydration heat in concrete in time. Possible ways of reduction of temperature during concrete hydration are mentioned. Paper presents study of possibilities of regulation temperature in concrete during hydration by selection of suitable input components. Blast furnace slag and micronized limestone were added to pure Portland cement; several variants of

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All-weather Concrete Masonry Construction - Ncma

Hydration and strength development in mortar and grout generally occurs at temperatures above 40°F (4.4°C) and only when sufficient water is available. However, masonry construction may proceed when temperatures are below 40°F (4.4°C) provided cold weather construction and protection requirements of reference 3 are followed.

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