Thermal Conductivity and Compressive Strength of Lightweight Mortar Utilizing Pumice Breccia as Fine Aggregate

Widodo, Slamet; Ma’arif, Faqih; Gan, Buntara Sthenly

doi:10.1016/j.proeng.2017.01.446

Cited by 16 publications

(6 citation statements)

References 2 publications

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“…Although lightweight concretes are classed as aerated concretes and lightweight aggregate concretes (LWA), the latter has higher strength and density as well as poorer thermal conductivity, in addition to requiring a high energy production method [9]. When used as a fine aggregate, pumice dramatically inhibits heat conductivity by up to 40% [10]. e thermal conductivity of aggregate is substantially impacted by the value of aggregate loose unit weight and the volume of the aggregate matrix to the total volume ratio [11].…”

Section: Introductionmentioning

confidence: 99%

Thermal Conductivity of Thermally Insulated Concretes in a Nuclear Safety Vessel of Reactor Vault: Experimental Interpretation

Anish

Arunkumar

Jayaprabakar

et al. 2022

Advances in Materials Science and Engineering

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Thermally insulated concretes are a type of alternative building material that helps improve thermal efficiency in nuclear reactor vault safety vessel applications. The experimental results of thermal conductivity values of lightweight concrete materials at various temperatures are presented in this paper. To minimize heat conduction in concrete, different lightweight aggregates and vermiculite are employed as coarse aggregate alternatives.Both linear and plane heat source approaches are used to calculate the thermal conductivity values of the specimens. The findings emphasize that increasing the proportion of lightweight particles in concrete may dramatically lower the thermal conductivity, with the kind of lightweight aggregates having a vital role in thermal insulation. The inclusion of micron-sized vermiculite decreases heat conductivity even further; however, the effect is less obvious than that of lightweight particles.

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Section: Introductionmentioning

confidence: 99%

Thermal Conductivity of Thermally Insulated Concretes in a Nuclear Safety Vessel of Reactor Vault: Experimental Interpretation

Anish

Arunkumar

Jayaprabakar

et al. 2022

Advances in Materials Science and Engineering

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“…Widodo et al (12) evaluated the k-value of a mortar in which the fine aggregate was replaced with pumice breccia, discovering that the k-value decreased by up to 40%. Kockal (13) evaluated the k-value of a mortar in which the normal fine aggregates were replaced by porous slag (SS), acidic pumice (AS) and basic pumice (BS).…”

Section: Introductionmentioning

confidence: 99%

Thermal properties of cement mortar with different mix proportions

et al. 2020

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The energy required for the heating and cooling of buildings is strongly dependant on the thermal properties of the construction material. Cement mortar is a common construction material that is widely used in buildings. The main aim of this study is to assess the thermal properties of cement mortar in terms of its thermal conductivity, heat capacity and thermal diffusivity in a wide range of grades (cement: sand ratio between 1:2 and 1:8). As there is insufficient information to predict the thermal conductivity and diffusivity of a cement mortar from its physical and mechanical properties, the relationships between thermal conductivity and diffusivity and density, compressive strength, water absorption and porosity are also discussed. Our results indicate that, for a cement mortar with a 28-day compressive strength in the range of 6–60 MPa, thermal conductivity, specific heat and thermal diffusivity are in the range of 1.5–2.7 W/(m.K), 0.87–1.04 kJ/kg.K and 0.89–1.26 (x10-6 m2/s), respectively. The scanning electron microscope (SEM) images showed that pore size varied from 18 μm to 946 μm for samples with different cement-to-sand ratios. The porosity of cement mortar has a significant effect on its thermal and physical properties. For this reason, thermal conductivity and thermal diffusivity was greater in cement mortar samples with a higher density and compressive strength.

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“…In addition, it also wastes the material in the process. This condition cannot be ignored because it will affect the building's strength, performance, and aesthetics [1]- [6].…”

Section: Introductionmentioning

confidence: 99%

Correlation of Ultrasonic Pulse Velocity with Porosity and Compressive Strength of Mortar with Limestone for Building Quality Assessment

Widodo

Ma’arif

Nugroho

et al. 2022

UKaRsT

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Mortar is used for bonding bricks, filling gaps in masonry, and as a plaster for strengthening and smoothing wall surfaces in finishing works. Poor quality of mortar can cause cracks in the walls which are identified after the building is completed. Assessment of a building is essential to determine its quality. Non-destructive testing is widely chosen because it will not directly affect the physical building condition. However, there still needs to achieve a good fit equation that can be used to estimate mortar quality using non-destructive testing. This research aimed to propose a formula to predict the mortar quality using an ultrasonic pulse velocity (UPV) test with porosity and compressive strength in the mortar with limestone. Variations in adding the lime powder to the mortar mix are 20%, 30%, 40%, and 55%. It was divided into M, S, N, and O types. The mortar cubes were prepared based on ASTM C-1329 and ASTM C-270. The specimens were then evaluated with UPV, porosity, and compressive strength test using three samples for each test. Equations for the relationship between UPV and porosity and compressive strength can be derived from these tests. The results showed that the value of the ultrasonic pulse speed is directly proportional to the compressive strength of the mortar, which fits the equation y = 0.0542e0.0015x, and is inversely proportional to the porosity, showing the equation y = 108.57e-6E-04x. The results of this study can be used to assess the quality of new construction works and existing buildings.

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Thermal Conductivity and Compressive Strength of Lightweight Mortar Utilizing Pumice Breccia as Fine Aggregate

Cited by 16 publications

References 2 publications

Thermal Conductivity of Thermally Insulated Concretes in a Nuclear Safety Vessel of Reactor Vault: Experimental Interpretation

Thermal Conductivity of Thermally Insulated Concretes in a Nuclear Safety Vessel of Reactor Vault: Experimental Interpretation

Thermal properties of cement mortar with different mix proportions

Correlation of Ultrasonic Pulse Velocity with Porosity and Compressive Strength of Mortar with Limestone for Building Quality Assessment

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