Effects Of Aggregate Types On Thermal Properties Of Concrete

Effects Of Aggregate Types On Thermal Properties Of Concrete

  • (PDF) Effects of aggregate types on thermal properties of ...

    In case of thermal diffusivity, concrete with stone-chips have 19% greater value than burnt clay brick-chips as coarse aggregate. Mixing ratio also have influence on thermal diffusivity

  • The Effect of Aggregate Properties on Concrete

    The Effect of Aggregate Properties on Concrete Concrete is a mixture of cementious material, aggregate, and water. Aggregate is commonly considered inert filler, which accounts for 60 to 80 percent of the volume and 70 to 85 percent of the weight of concrete.

  • Size effects on mechanical properties of recycled ...

    Recycled aggregate thermal insulation concrete (RATIC) is a kind of green material, in which the thermal insulation material-glazed hollow beads (GHB) and recycled coarse aggregate (RCA) are substituted for natural sand and coarse aggregate, respectively, partly to improve the thermal properties of concrete and improve the utilization of waste concrete. RATIC has low thermal

  • Author: Wenjing Wang, Yuanzhen Liu, Xiaochao Qin, Zhu Li, Pengfei Duan, Xiaoqiang Dong
  • effects of aggregate types on thermal properties of concrete

    Nine mixture proportions were used to examine the effect of size on RATIC mechanical properties ().Different concrete types (normal concrete (NC), RAC, thermal insulation concrete (TIC), RATIC), recycled coarse aggregate replacement of RATIC (0%, 30%, 50%, 70%, ), and strength grade (C30, C40, C50) of RATIC were investigated.

  • Effect of coarse aggregate type and loading level on the ...

    Effect of coarse aggregate type and loading level on the high temperature properties of concrete. ... The properties of concrete at high temperature were evaluated by aggregate types. • The thermal properties of concrete are mainly affected by that of aggregate. • LWC indicates better thermal properties than NWC. Abstract. When concrete is exposed to

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  • Effect of Aggregates on the Properties of Concrete ...

    Usually an aggregate used in cement concrete is considered at least 10 times stronger than hardened cement paste. Hence the strength of concrete depends upon its bond strength. The bond strength depends upon the strength of cement paste and on the properties of aggregate surface as well. Bond strength is found to increase with the age of concrete.

  • Physical and Thermal Properties of Aggregate and its ...

    If the difference between coefficients of thermal expansion of aggregate and cement paste is smaller, durability of concrete is not adversely affected within a temperature range of 4 to 60 °C If the difference between coefficients of thermal expansion of aggregate and cement paste is more than 5.5 x 10 -6 / o C , durability of concrete subjected to freezing and thawing may be

  • Effects of Aggregate Properties on Concrete - Size, Grading

    Effects of aggregate properties on Concrete like 'Shape and surface texture' affects usually the properties of freshly mixed concrete. Angular aggregates increases flakiness or elongation thus reduces workability. Round smooth aggregates require less water and less lubrication and greater workability in a given w/c ratio.

  • (PDF) Effect of Aggregate Type on Mechanical Properties of ...

    The effects of aggregate type on mechanical properties were investigated under standard, atmospheric, and high-pressure steam curing. The test

  • EFFECTS OF AGGREGATE TYPE, SIZE, AND CONTENT ON

    Coarse aggregate typically occupies over one-third of the volume of concrete, and research indicates that changes in coarse aggregate can change the strength and fracture properties of concrete.

  • Effect of coarse aggregate type and loading level on the ...

    Effect of coarse aggregate type and loading level on the high temperature properties of concrete. ... The properties of concrete at high temperature were evaluated by aggregate types. • The thermal properties of concrete are mainly affected by that of aggregate. • LWC indicates better thermal properties than NWC. Abstract. When concrete is exposed to temperature changes, its durability is ...

  • Physical and Thermal Properties of Aggregate and its ...

    If the difference between coefficients of thermal expansion of aggregate and cement paste is smaller, durability of concrete is not adversely affected within a temperature range of 4 to 60 °C If the difference between coefficients of thermal expansion of aggregate and cement paste is more than 5.5 x 10 -6 / o C , durability of concrete subjected to freezing and thawing may be adversely affected

  • Effect of Surrogate Aggregates on the Thermal Conductivity ...

    3.2. Effect of Aggregate Size. Fine and coarse aggregates are compared for their effects on the thermal conductivity of paste, mortar, and concrete specimens. The thermal needle probes are fully inserted into cylindrical specimens (Φ 70 mm × 100 mm),

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  • Effect of aggregate type, gradation, and compaction level ...

    This paper investigates the effects of mix design factors on the thermal properties of Superpave asphalt concrete. The thermal properties were measured using a guarded testing device (k-alpha device) developed recently at the University of New Brunswick.Two aggregate types, three gradations (determined by the material retained on a 4.75 mm sieve), and four compaction levels (at 35, 70, 100 ...

  • HOW AGGREGATE PROPERTIES AFFECTS CONCRETE

    2019-02-15  INFLUENCE OF AGGREGATE PROPERTIES ON CONCRETE. Aggregates influence the properties of concrete/mortar such as water requirement, cohesiveness and workability of the concrete in plastic stage, while they influence strength, density,

  • Effect of Surrogate Aggregates on the Thermal Conductivity ...

    We present an experimental assessment of the thermal conductivity of five thermally insulated concrete specimens made using lightweight aggregates and Limestone bubbles in place of normal aggregates. Four different measurement methods are used to assess the reliability of the thermal data and to evaluate the effects of the various sensor types. The concrete specimens are also assessed at every 100 ...

  • Thermal properties of concrete - BrainKart

    Thermal conductivity is measured in joules per second per square meter of are conductivity of concrete depends on type of aggregate a of body when the temperature difference is 1degree C per meter thickness of the body. The conductivity of concrete depends on type of aggregate moisture content, density and temperature of concrete.

  • The effect of pumice as aggregate on the mechanical and ...

    The cement dosages (250 kg/m3), aggregate amounts (250 kg/m3), fresh concrete densities and w/c ratio (0.45) were kept constant in all foamed concrete mixtures. Then, physical, mechanical, and thermal conductivity properties of the resulting foam concretes were investigated. When the findings were evaluated, the most suitable type of lightweight aggregates for use in foam concrete have been ...

  • Mechanical and thermal properties of prepacked aggregate ...

    proportion, aggregate type and cementitious particles. In contrast to other thermal properties, such as thermal con-ductivity and the specific heat of the concrete, however, few studies are available [19–23]. The replacement of ordinary portland cement (OPC) by POFA in the prepacked aggregate concrete

  • Durability of Concrete Types of Durability and Factors ...

    Durability is defined as the capability of concrete to resist weathering action, chemical attack and abrasion while maintaining its desired engineering properties. It normally refers to the duration or life span of trouble-free performance. Different concretes require different degrees of durability depending on the exposure environment and properties desired.

  • The effect of pumice as aggregate on the mechanical and ...

    The cement dosages (250 kg/m3), aggregate amounts (250 kg/m3), fresh concrete densities and w/c ratio (0.45) were kept constant in all foamed concrete mixtures. Then, physical, mechanical, and thermal conductivity properties of the resulting foam concretes were investigated. When the findings were evaluated, the most suitable type of lightweight aggregates for use in foam concrete have been ...

  • Thermal properties of concrete - BrainKart

    Thermal conductivity is measured in joules per second per square meter of are conductivity of concrete depends on type of aggregate a of body when the temperature difference is 1degree C per meter thickness of the body. The conductivity of concrete depends on type of aggregate moisture content, density and temperature of concrete.

  • Effect of different expanded aggregates on the properties ...

    The thermal (thermal conductivity) and mechanical (compressive strength) properties of the lightweight concrete specimens were evaluated experimentally and numerically. The relationship between the physical properties and characteristics was analysed to demonstrate the effect of each expanded aggregate on lightweight aggregate concrete.

  • Effect of Aggregate Mineralogy and Concrete Microstructure ...

    Effect of Aggregate Mineralogy and Concrete Microstructure on Thermal Expansion and Strength Properties of Concrete Jinwoo An 1, S. Sonny Kim 2,*, Boo Hyun Nam 1,* and Stephan A. Durham 2 1 Department of Civil, Environmental, and Construction Engineering, University of Central Florida, Orlando, FL 32816, USA; [email protected] 2 Department of Civil Engineering, University of Georgia ...

  • Thermal properties of concrete with various aggregates

    We have studied whether it is possible to improve the thermal properties of concrete for buildings with high thermal mass by using aggregates with high heat capacity and/or materials with high thermal conductivity. It was found that both volumetric heat capacity and thermal

  • Properties of Concrete at Elevated Temperatures

    Thermal properties that govern temperature dependent properties in concrete structures are thermal conductivity, specific heat (or heat capacity), and mass loss. These properties are significantly influenced by the aggregate type, moisture content, and composition of concrete mix.

  • Different Types Sizes of Aggregate for Concrete ...

    2018-08-11  GLASS AGGREGATE Glass aggregate can replace part or all of the sand and gravel in concrete, for effects that range from colorful terrazzo, to granite- or marble-like finishes, to concrete that reflects light like a mirror. Glass aggregate can even be used to produce concrete that literally glows. SLAG AGGREGATE

  • A Study on the Thermal Properties of High-Strength ...

    This study investigated the effects of replacing fine aggregates with coal bottom ash (CBA) and the influence of curing age on the thermal properties of high-strength concrete with a compressive strength exceeding 60 MPa. The different CBA aggregate contents included 25%, 50%, 75%, and 100%, and different curing ages included 28 and 56 days.

  • Effects of Aggregate Blends on the Properties of Portland ...

    The laboratory testing documented in this report demonstrates conclusively that the material properties of blended aggregate concrete, including tensile strength, compressive strength, modulus of elasticity, drying shrinkage, and thermal coefficient of expansion, may be estimated as a simple weighted average of the properties of the unblended constituents.

  • Thermal conductivity modelling of structural lightweight ...

    2019-12-20  The study was based on an extensive experimental campaign carried out for different water to cement ratios and types and volume fractions of aggregate. Moreover, given that there are no standards for determining the thermal conductivity of lightweight aggregates (LWAs), a new technique was devised. The proposed model is easily implemented in practice, contributing to expeditious

  • Effect of different expanded aggregates on the properties ...

    Several types of lightweight aggregates have been used to produce lightweight aggregate concrete, and the characteristics of such lightweight aggregates strongly affect the material properties. In this study, three different expanded materials – expanded Limestone (Liaver), expanded clay (Liapor) and foam Limestone (Ecoglas) – were utilised as lightweight aggregates, and their effects on the ...

  • Effects of Coarse Aggregate on the Physical Properties of ...

    The primary goal of the research was to study the effects of different coarse aggregate types on the physical properties and design of portland cement concrete, with the emphasis on coarse aggregate from Florida for use in structural concrete. Concrete specimens were made and tested to acquire the information necessary for use in the design equations used to predict the physical properties of ...

  • Effect of Aggregate Mineralogy and Concrete Microstructure ...

    Effect of Aggregate Mineralogy and Concrete Microstructure on Thermal Expansion and Strength Properties of Concrete Jinwoo An 1, S. Sonny Kim 2,*, Boo Hyun Nam 1,* and Stephan A. Durham 2 1 Department of Civil, Environmental, and Construction Engineering, University of Central Florida, Orlando, FL 32816, USA; [email protected] 2 Department of Civil Engineering, University of Georgia ...

  • A Study on the Thermal Properties of High-Strength ...

    The thermal conductivity of concrete is a key factor for efficient energy consumption in concrete buildings because thermal conductivity plays a significant role in heat transfer through concrete walls. This study investigated the effects of replacing fine aggregates with coal bottom ash (CBA) and the influence of curing age on the thermal properties of high-strength concrete with a ...

  • Effect of Different Gradings of Lightweight Aggregates on ...

    Aggregates on the Properties of Concrete Sang-Yeop ... Lightweight aggregate concrete is a material with very low density and good thermal insulation, and several types of lightweight aggregates have been used for lightweight concrete. Since the characteristics of lightweight aggregates strongly affect the properties of lightweight concrete, a proper consideration for the use of lightweight ...

  • Effects of Aggregate Blends on the Properties of Portland ...

    thermal properties, and shrinkage properties. The objective of this study was to investigate the material properties of crushed limestone and siliceous river gravel, two aggregates predominantly used in current pavement construction, and to determine a relationship between the properties of single-aggregate concrete and concrete made with predetermined blends of limestone and gravel. This ...

  • Effect of Recycled Aggregates On Mechanical Properties Of ...

    Effect of Recycled Aggregates on Mechanical Properties of Concrete . Yamini Jayantibhai Patel . Abstract: Many structures that were constructed in India during the construction boom of the 1970s are now required of either major repairs or possible replacement. Also due to new construction for better economic growth, tructures are s turned into debris resulting from natural disasters like ...

  • Effect of Aggregate-Cement Ratio on Engineering Properties ...

    Pervious concrete is a composite type of material containing coarse aggregate, little or no fine aggregate, cement and water. In pervious concrete, carefully controlled amount of water and cementitious materials are used to create a paste that forms a thick coating around aggregate particles. Unlike conventional concrete which contains only 3-5% voids, pervious concrete contains around 15

  • Effect of aggregate type, casting, thickness and curing ...

    Different types of aggregate were used in the analysis for studying the effect of thermal properties of aggregate on temperature and restrained strain in mass concrete. Different conditions of curing (insulation and normal curing) were also studied and compared. It was found from the analytical results that the maximum temperature increases with the increase of the thickness of structure. The ...

  • Thermal conductivity modelling of structural lightweight ...

    2019-12-20  The study was based on an extensive experimental campaign carried out for different water to cement ratios and types and volume fractions of aggregate. Moreover, given that there are no standards for determining the thermal conductivity of lightweight aggregates (LWAs), a new technique was devised. The proposed model is easily implemented in practice, contributing to expeditious