Evaluation of thermal conductivity, mechanical and transport properties of lightweight aggregate foamed geopolymer concrete

Liu, Michael Yong Jing; Alengaram, U. Johnson; Jumaat, Mohd Zamin

doi:10.1016/j.enbuild.2013.12.029

Cited by 342 publications

(124 citation statements)

References 33 publications

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“…3) at the age of 28 days, according to Chinese Standard GB10294-2008. It is a stationary method which has been discussed by Shi (Shi et al, 2014) as well as by various other authors (Liu et al, 2014;Ng et al, 2010). Six specimens which were divided into three groups were used for each mix proportion.…”

Section: Experimental Studymentioning

confidence: 99%

Experimental study and modeling on effective thermal conductivity of EPS lightweight concrete

Jiang

Liu

et al. 2016

JTST

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Section: Experimental Studymentioning

confidence: 99%

Experimental study and modeling on effective thermal conductivity of EPS lightweight concrete

Jiang

Liu

et al. 2016

JTST

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“…The reuse of the OPS waste material in concrete could encourage reduction in the environmental pollution associated with the irresponsible disposal of OPS waste. In addition, when OPS is used to produce LWC, the resulting OPS concrete (OPSC) is found to have good thermal insulation properties compared to conventional concrete (Alengaram et al, 2013;Liu et al, 2014), and, therefore, such concrete could be of significant benefit when used in concrete blocks or walls. This could lead to significant energy savings due to the reduction in air-conditioning, and, hence, contribute towards the construction of a more environmentally friendly building.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of the mechanical properties of lightweight oil palm shell concrete using rice husk ash and manufactured sand

Foong

Alengaram

Jumaat

et al. 2015

J. Zhejiang Univ. Sci. A

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Abstract:This study explores the use of rice husk ash (RHA) and manufactured sand (M-sand) as replacements for cement and fine aggregate, respectively, in lightweight oil palm shell concrete (OPSC). In the first stage of this study, the effect of various cement replacement levels, with RHA (5%, 10%, 15%, and 20%) and 100% sand replacement with M-sand and quarry dust (QD), on the compressive strength of OPSC was investigated. The results showed that the highest compressive strength of OPSC of about 51.49 MPa was achieved with the use of 15% RHA and M-sand. In the second stage of the work, the variables of RHA (0 and 15%) and M-sand (0, 50%, and 100%) were used to investigate their combined effects on the mechanical properties of OPSC. It was found that the combination of 15% RHA and 100% M-sand gave the best performance of OPSC in terms of mechanical properties, such as compressive, splitting tensile, flexural strength, and Young's modulus.

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“…Tüm malzemeler için sıcaklığın artması ile k değerinin arttığı gözlenmiştir. Jing Liu vd., [34] Binaların yalıtımında yaygın olarak kullanılan malzemelerden birisinin köpük beton olduğunu vurgulamışlar ve palmiye yağının köpük beton ısıl iletkenliğine olan etkisini deneysel olarak araştırmışlardır. Numunelerin ısıl iletkenlik katsayıları BS EN 12664 standardına uygun olarak ölçmüşlerdir.…”

Section: Introductionunclassified

Köpük Betonun Yoğunluk ve Sıcaklığa Bağlı Isıl İletkenlik Katsayısının Isı Akış Ölçer Yöntemiyle Belirlenmesi

Koru¹

2017

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Isı akış ölçer (IAÖ)Özet: Köpük beton, taze halde yüksek akıcılığa ve sertleştikten sonra normal betona kıyasla düşük yoğunluğa ve yüksek ısıl dirence sahip ısıl işlemsiz olarak üretilebilen bir hafif beton türüdür. Köpük betonun yapı ve yalıtım elemanı olarak kullanılabilme potansiyeli birlikte değerlendirildiğinde bina ısıl performansı, konforu ve doğru projelendirilmesi açısından yoğunluk ve sıcaklığa bağlı ısıl iletkenlik katsayısının (k) belirlenmesi önemlidir. Bu çalışmada 309-1427 kg/m 3 kuru yoğunluğa sahip 10 farklı köpük beton numunenin yoğunluk ve sıcaklığa bağlı k değerleri ısı akış ölçer (IAÖ) yöntemi ile belirlenmiştir. Ölçümler (-10, 0, 10 ,20 ,30, 40, 50 °C) ortalama sıcaklık değerlerinde gerçekleştirilmiştir. Ölçümü yapılan tüm köpük beton numuneleri için sıcaklığın ve yoğunluğun artması ile ısıl iletkenlik katsayısı artmıştır. Elde edilen deneysel bulgulardan köpük beton için sıcaklık, yoğunluk ve k değeri arasındaki ilişkiyi ifade eden ve ısıl iletkenlik katsayılarının değişimlerini tahmin etmeye yönelik bir bağıntı önerilmiştir. Deneyler sonucunda köpük betonun ısıl iletkenlik katsayısının geleneksel betona oranla ve yoğunluğa bağlı 5-27 kat daha düşük olduğu gözlenmiştir. Bununla birlikte köpük betonun yoğunluğa bağlı Reş=1,5 (m 2 K/W) değerini sağlayan uygulama kalınlıkları sunulmuştur. Sonuç olarak ısıl iletkenlik katsayısı ve uygulama kalınlığı açısından en ideal köpük beton numunesi KB-309 (kg/m 3 ) olarak belirlenmiştir. Determination of Thermal Conductivity of Foam Concrete with Heat Flow Meter MethodDepending on Density and Temperature KeywordsFoam concrete, Thermal conductivity k, Temperature, Density, Heat flow meter (HFM) Abstract: Foam concrete which can be produced without heat treatment process is a lightweight concrete with high flowability in its fresh form and low density and high thermal resistance compared to regular concrete after hardening of it. When the foam concrete is evaluated in terms of its potential as a structural and an insulation material, it is so important to determine thermal conductivity of the foam concrete depending on density and temperature in order to make a correct design in terms of thermal performance and comfort of the building. In the study, k values of ten different foam concrete samples with dry densities ranging from 309 to 1427 kg/m 3 are determined by heat flow meter method (HFM) depending on density and temperature. Measurements have been performed mean temperature values of -10, 0, 10, 20, 30, 40 and 50 °C respectively. Thermal conductivities are increased depending on increase of temperature and density for all measured foam concrete samples. As a result of measurement findings, an equation describing the relationship among temperature, density and k value is proposed for foam concrete to determine thermal conductivity variations. It is also observed from the measurements that thermal conductivity of the foam concrete is 5-27 times lower than that of traditional concrete depending on variations of the densities. In addition, application ...

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Evaluation of thermal conductivity, mechanical and transport properties of lightweight aggregate foamed geopolymer concrete

Cited by 342 publications

References 33 publications

Experimental study and modeling on effective thermal conductivity of EPS lightweight concrete

Experimental study and modeling on effective thermal conductivity of EPS lightweight concrete

Enhancement of the mechanical properties of lightweight oil palm shell concrete using rice husk ash and manufactured sand

Köpük Betonun Yoğunluk ve Sıcaklığa Bağlı Isıl İletkenlik Katsayısının Isı Akış Ölçer Yöntemiyle Belirlenmesi

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