Predicting thermal performance of a mass concrete

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Predicting thermal performance of a mass concrete ...

2019-12-1  ConcreteWorks (CW) has specific capabilities to predict the early age thermal development and cracking potential of mass concrete and can assist in devising a TCP . It contains modules for several structural concrete applications, including bridge deck types, precast concrete beams, and concrete pavements [ 15 ].

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Predicting thermal performance of a mass concrete

The properties of mass concrete mixes, required as CW inputs, were measured through isothermal and semi-adiabatic calorimetry tests. The temperature development profile, temperature differential, maturity, and compressive strength of the mixes were predicted and compared with those measured through the real-time monitoring of the bridge foundation.

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"Predicting early-age thermal behavior of mass

2013-5-30  Due to the increased heat generation during massive concrete foundation construction, the concern for cracking, resulting from thermal contraction, is increased. To reduce the thermal cracking potential and ensure the safety and durability of the foundation structure, several practices are utilized, such as using low heat generating cement, proper ...

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Models for predicting thermal properties and

2018-2-16  replacement of cement in mass concrete structures. However, the effect of slag towards thermal properties in mass concrete is not extensively investigated. Predicting thermal properties and adiabatic temperature rise are essentially useful for investigating thermal cracking potential especially at early stage of mass concrete.

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Predicting early-age thermal behavior of mass concrete

2020-10-13  Predicting early-age thermal behavior of mass concrete for bridge foundations by Jinxin Li A thesis submitted to the graduate faculty in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE Major: Civil Engineering (Civil Engineering Materials) Program of Study Committee: KejinWang, Co-Major Professor

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Predicting temperature drop rate of mass concrete

Thus, in order to control the thermal cracking of such structure, temperature development due to heat of hydration of cement should be dropped at suitable rate. In this study, an attempt have been made to formulate the relation between cooling rate of mass concrete with passage of time (age of concrete) and water cooling parameters: flow rate and inlet temperature of cooling water.

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A Stochastic Multi-scale Model for Predicting the Thermal ...

A Stochastic Multi-scale Model for Predicting the Thermal Expansion Coefficient of Early-age Concrete S. Liu1, X. Liu2, X. F. Guan3, P.F. He1, Y. Yuan2 Abstract: Early performance of mass concrete structures is very sensitive to the thermal expansion characteristics of concrete. As a

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THERMAL PERFORMANCE OF MASONRY THERMAL

2018-7-27  accurate calculation method useful in predicting the thermal performance of concrete block walls insulated with perlite loose fill. Two calculation techniques, the series—parallel (isothermal planes) and the parallel analyses methods, are given in the ASHRAE Handbook of Fundamentals to determine the thermal performance of building

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Thermal mass of concrete

Concrete has a high thermal mass with properties similar to brick and stone. It is possible to absorb heat from the atmosphere in warm weather and release it during cooler periods, e.g. overnight. This is known as the ‘thermal flywheel’ effect.

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Concrete as a thermal mass material for building ...

2018-9-1  Thermal performance is evaluated according to the specific heat capacity and specific latent heat. Applying thermal mass materials such as concrete is deemed a suitable strategy to reduce the energy consumption of buildings. Concrete with low thermal conductivity and high specific heat capacity is desirable in building construction.

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"Predicting early-age thermal behavior of mass

2013-5-30  Large volume concrete continues to present increasing concern in the construction of bridges. Due to the increased heat generation during massive concrete foundation construction, the concern for cracking, resulting from thermal contraction, is increased. To reduce the thermal cracking potential and ensure the safety and durability of the foundation structure, several practices are utilized ...

Get price

A Stochastic Multi-scale Model for Predicting the Thermal ...

A Stochastic Multi-scale Model for Predicting the Thermal Expansion Coefficient of Early-age Concrete S. Liu1, X. Liu2, X. F. Guan3, P.F. He1, Y. Yuan2 Abstract: Early performance of mass concrete structures is very sensitive to the thermal expansion characteristics of concrete. As a

Get price

Predicting temperature drop rate of mass concrete

Thermal cracking on concrete dams depends upon the rate at which the concrete is cooled (temperature drop rate per day) within an initial cooling period during the construction phase. Thus, in order to control the thermal cracking of such structure, temperature development due to heat of hydration of cement should be dropped at suitable rate.

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Concrete Temperature Monitoring in Mass Concrete

2021-5-10  Mass concrete is categorized as any volume of concrete with dimensions large enough to require that measures be taken to cope with generation of heat hydration of the cement and attendant volume changes to minimize cracking.When it comes to large bodies of concrete, one of the most important characteristics is thermal behavior.

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THERMAL PERFORMANCE OF MASONRY THERMAL

2018-7-27  accurate calculation method useful in predicting the thermal performance of concrete block walls insulated with perlite loose fill. Two calculation techniques, the series—parallel (isothermal planes) and the parallel analyses methods, are given in the ASHRAE Handbook of Fundamentals to determine the thermal performance of building

Get price

Model for Predicting the Thermal Conductivity of

2021-1-19  Thermal conductivity of concrete greatly influences the heat transfer of buildings and affected by many factors. This paper presents a prediction model for thermal conductivity of concrete by adopting the theory of Wiener bounds and considering concrete to have four components (water, air, aggregate, and cement mortar). The proposed model considers the combined effects of porosity, water ...

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Temperature Management of Mass Concrete

2006-11-2  Thermal analysis of mass concrete elements alone will not directly control cracking risk. Clearly, a more unified approach to engineering mass concrete to prevent thermal cracking and improve long-term performance is needed. Research* suggests that the cracking risk of mass concrete

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Thermal Cracking of Mass Concrete Bridge Footings in ...

Finite-element model results showed that reasonably sized mass concrete footings that followed typical NCDOT control plans did not have a high likelihood of significant cracking from thermal stresses. However, a much larger mass concrete footing had a distinctly higher risk of significant cracking even when typical NCDOT control plans are followed.

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ACI 207.1R-05 Guide to Mass Concrete

2017-8-5  The design of mass concrete structure s is generally based on durability, economy, and thermal action, with strength often being a secondary concern. This document contains a history of the development of mass concrete practice and discussion of materials and concrete mixture proportioning, p roperties, construction methods, and equipment.

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Predicting thermal and mechanical performance of ...

2021-2-26  Predicting thermal and mechanical performance of stochastic and architected International Journal of Heat and Mass Transfer ( IF 4.947) Pub Date : 2021-02-25, DOI: 10.1016/j Fangzhou Wang, Huan Jiang, Yanyu Chen, Xianglin Li

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Model for Predicting the Thermal Conductivity of

2021-1-19  Thermal conductivity of concrete greatly influences the heat transfer of buildings and affected by many factors. This paper presents a prediction model for thermal conductivity of concrete by adopting the theory of Wiener bounds and considering concrete to have four components (water, air, aggregate, and cement mortar). The proposed model considers the combined effects of porosity, water ...

Get price

Predicting temperature drop rate of mass concrete

Thermal cracking on concrete dams depends upon the rate at which the concrete is cooled (temperature drop rate per day) within an initial cooling period during the construction phase. Thus, in order to control the thermal cracking of such structure, temperature development due to heat of hydration of cement should be dropped at suitable rate.

Get price

Thermal Mass Performance of Concrete Panels

2020-7-14  Thermal mass performance of concrete panels incorporated with phase change materials . Dervilla Niall. 1,2, Oliver Kinnane. 3, Roger P. West. 2. and Sarah McCormack. 2. 1. Dublin Institute of Technology, 2. Trinity College, University of Dublin and . 3. University College Dublin, Abstract: Using the mass of a building as a thermal storage ...

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Predicting Long-Term Coefficient of Thermal

2020-6-23  The coefficient of thermal expansion (CTE) of concrete is an important parameter that affects the design and performance analysis of concrete pavements. Higher CTE value results in increased curling and related stresses. A 28-day CTE value is used for designing rigid pavements.

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Temperature Management of Mass Concrete

2006-11-2  Thermal analysis of mass concrete elements alone will not directly control cracking risk. Clearly, a more unified approach to engineering mass concrete to prevent thermal cracking and improve long-term performance is needed. Research* suggests that the cracking risk of mass concrete

Get price

Mass Concrete Thermal Control - agcia

2009-4-23  Iowa Mass Concrete Specifications • Special Provision for Mass Concrete – Control of Heat of Hydration – Mix design • Cement: Type II, IP, or IS – min. 560 lbs • Slag and Class F fly ash substitution • Maximum water to cementitious ratio = 0.45 – Thermal Control Plan (per 207.4R-05 ACI) • Concrete temperature at placement: 40 ...

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Predicting thermal and mechanical performance of ...

2021-2-26  Predicting thermal and mechanical performance of stochastic and architected International Journal of Heat and Mass Transfer ( IF 4.947) Pub Date : 2021-02-25, DOI: 10.1016/j Fangzhou Wang, Huan Jiang, Yanyu Chen, Xianglin Li

Get price

ACI 207.1R-05 Guide to Mass Concrete

2017-8-5  The design of mass concrete structure s is generally based on durability, economy, and thermal action, with strength often being a secondary concern. This document contains a history of the development of mass concrete practice and discussion of materials and concrete mixture proportioning, p roperties, construction methods, and equipment.

Get price

Thermal performance of different materials BUILD

2021-7-31  Thermal mass properties, the thickness of the material and the method of construction will change the R-values of your walls and roof. There are minimum R-value requirements for these parts of your home specified under the Building Code of

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Predicting the Long-Term Insulation Performance of ...

2015-4-1  concrete ducts, asbestos cement pipes and pipes with sliding insulation or an air gap to the insulation. This thesis focuses on predicting the insulation performance of the type of district heating pipe generally used in fairly new network installations, i.e. a steel fluid pipe insulated with polyurethane foam covered by a polyethylene casing

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