An experimental study on thermal conductivity of iron ore sand cement mortar

Liu, Kai; Wang, Zhi; Jin, Can; Wang, Fang; Xue-yuan, LU

doi:10.1016/j.conbuildmat.2015.10.108

Cited by 53 publications

(18 citation statements)

References 28 publications

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“…This can be attributed to the enhanced pore formation within the composite with increasing amount of water [31]. The thermal conductivity of cement paste has also been observed to decrease by up to 30% over a 7-day hardening period but remained unchanged 5 beyond this period [32,33].…”

Section: Thermal Conductivity Of Cementitious Compositesmentioning

confidence: 99%

Thermal conductivity of cementitious composites containing microencapsulated phase change materials

Ricklefs

Thiele

Falzone³

et al. 2017

International Journal of Heat and Mass Transfer

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This thesis investigates the effects of adding microencapsulated phase change materials (PCM) on the thermal conductivity of cement paste and cement mortar composites. Embedding cementitious composites with microencapsulated PCM has been considered a promising method for increasing the thermal mass of buildings to achieve greater energy efficiency. Cement paste and cement mortar samples were synthesized with a constant water to cement ratio of 0.45. Both contained microencapsulated PCM with diameter ranging from 17-20 µm, volume fraction up to 30%, and a melting temperature around 24˚C. The cement mortar also contained quartz grains 150-600 µm in diameter such that the sum of the volume fractions of quartz and microencapsulated PCM was fixed at 55%.All samples were aged for more than 28 days. Their effective density and free moisture content were systematically measured. A guarded hot plate apparatus was designed, assembled, and validated according to the ASTM C177 to measure the effective thermal conductivity of the aged specimens of cement paste and cement mortar without and with microencapsulated PCM. Measurements were 2 performed between 10 and 40˚C, encompassing the entire PCM phase change temperature window. The effective thermal conductivity of both the cement paste and the cement mortar composites was found to be nearly independent of temperature in the range considered. It also decreased as the volume fraction of microencapsulated PCM increased. Finally, excellent agreement was obtained between experimental data and the effective medium approximation derived by Felske (2004) for core-shell-matrix composites. 3The thesis of Alex Ricklefs is approved.

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Section: Thermal Conductivity Of Cementitious Compositesmentioning

confidence: 99%

Thermal conductivity of cementitious composites containing microencapsulated phase change materials

Ricklefs

Thiele

Falzone³

et al. 2017

International Journal of Heat and Mass Transfer

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“…According to the basic principles of heat transfer, Mirza and Li [46,47] derived the components of the temperature field of concrete under fire by means of finite difference methods. Additionally, a variety of experiments have been conducted to test the influences of different factors, including heating rate [36], aggregates [48,49], cement fraction [50], moisture rate [51], admixture [52], and temperature http://dx.doi.org/10.1016/j.ijheatmasstransfer.2016.03.033 0017-9310/Ó 2016 Elsevier Ltd. All rights reserved. elevation [53,49], on the thermophysical properties of concrete.…”

Section: Introductionmentioning

confidence: 99%

On the thermal spalling mechanism of reactive powder concrete exposed to high temperature: Numerical and experimental studies

Liu

et al. 2016

International Journal of Heat and Mass Transfer

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“…Table 1. Mix composition of conventional cement bricks in lab scale [5][6][7][8][9][10][11][12][13][14]. At the range of 0.40 to 0.55 w/c ratio, the thickness of bricks produced were in the range of 73 mm to 75 mm, indicating enough compaction during pressing.…”

Section: Effect Of W/c Ratio On the Quality Quantity And Production mentioning

confidence: 99%

Industrial Operation Feasibility for Red Gypsum-Based Brick Manufacturing

Sidek

Yunus²,

Khan³

et al. 2019

AJAS

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The red gypsum (RG) waste is one of the major solid wastes generated in Malaysia. Currently the RG is mainly sent to secured landfill within the premise of the waste generators. In this study, the RG was investigated for its potential to be used as replacement for cement and sand in the manufacturing of cement brick using industrial brick manufacturing facility. An industrial guideline for RG brick manufacturing industry was established based on the outcome of this study. The guideline can be used by RG brick manufacturer to select the best water/cement (w/c) ratio to be used in the RG brick manufacturing for a specific market segment in order to maximize its profit and competitiveness.

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An experimental study on thermal conductivity of iron ore sand cement mortar

Cited by 53 publications

References 28 publications

Thermal conductivity of cementitious composites containing microencapsulated phase change materials

Thermal conductivity of cementitious composites containing microencapsulated phase change materials

On the thermal spalling mechanism of reactive powder concrete exposed to high temperature: Numerical and experimental studies

Industrial Operation Feasibility for Red Gypsum-Based Brick Manufacturing

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