A novel lightweight concrete-fabrication and its thermal and mechanical properties

Chen, Bing; Liu, Ning

doi:10.1016/j.conbuildmat.2013.03.091

Cited by 128 publications

(37 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…However, these foam concretes present poor durability and high cost, and the availability of special cements is relatively difficult, all of which lead to limitations in the application and popularization of foam concretes. In addition, many investigations have been conducted on the composition, physical properties and application of foam concretes with density of 600-1500 kg/m 3 [7][8][9][10][11], while few studies have been done on the composition and properties of ultra-lightweight foam concretes (<300 kg/m 3 ), which show superior thermal insulation properties than the former [12]. http In this paper, ultra-lightweight foam concrete was prepared using Portland cement, fly ash, hydrogen peroxide and chemical admixtures.…”

Section: Introductionmentioning

confidence: 99%

Proportioning and characterization of Portland cement-based ultra-lightweight foam concretes

Huang

Zhang

2015

Construction and Building Materials

141

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Proportioning and characterization of Portland cement-based ultra-lightweight foam concretes

Huang

Zhang

2015

Construction and Building Materials

141

View full text Add to dashboard Cite

“…For example Yu et al used recycled expanded glass and achieved 28-day density of the composites as low as 1280 kg/m 3 with good durability, however, the corresponding compressive strength was limited to 23.3 MPa Yu et al 2013). Also, Chen and Liu developed expanded polystyrene foam composite with density of 400 and 800 kg/m 3 with excellent thermal insulation properties (lower thermal conductivity coefficient) but the extremely low corresponding strength values of 3 and 13 MPa hampered the use in structural applications (Chen and Liu 2013). Similarly, Topku and Isikdag used perlite aggregate as LWF and produced the composites within the density range of 1800-2040 kg/m 3 and deduced that any amount of perlite aggregate greater than 30% has negative effects on the parameters relating to mechanical strength.…”

Section: Introductionmentioning

confidence: 99%

Effects of Different Lightweight Functional Fillers for Use in Cementitious Composites

Hanif

Cheng

et al. 2017

Int J Concr Struct Mater

View full text Add to dashboard Cite

Abstract:The effects of different lightweight functional fillers on the properties of cement-based composites are investigated in this study. The fillers include fly ash cenospheres (FACs) and glass micro-spheres (GMS15 and GMS38) in various proportions. The developed composites were tested for compressive, flexural and tensile strengths at 10 and 28-day ages. The results indicated that both FACs and GMS38 are excellent candidates for producing strong lightweight composites. However, incorporation of GMS15 resulted in much lower specific strength values (only up to 13.64 kPa/kg m 3 ) due to its thinner shell thickness and lower isostatic crushing strength value (2.07 MPa). Microstructural analyses further revealed that GMS38 and GMS15 were better suited for thermal insulating applications. However, higher weight fraction of the fillers in composites leads to increased porosity which might be detrimental to their strength development.

show abstract

“…Chen ve Liu [35] tarafından yapılan çalışmada özgün EPS katkılı köpük betonun mekanik, termal özellikleri ve işlenebilirliğine köpük içeriğinin etkisini araştırmışlardır. Taze halde 400 ve 800 kg/m 3 yoğunluğa sahip özgün köpük betonlar için dayanımın 3-13 Mpa arasında değiştiği ve ısıl iletkenlik değerinin 0,09-0,25 (W/mK) arasında değiştiğini ve EPS katkısının işlenebilirliği artırdığını vurgulamışlardır.…”

Section: Introductionunclassified

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

Koru¹

2017

SDÜ Fen Bil Enst Der

View full text Add to dashboard Cite

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 ...

show abstract

A novel lightweight concrete-fabrication and its thermal and mechanical properties

Cited by 128 publications

References 24 publications

Proportioning and characterization of Portland cement-based ultra-lightweight foam concretes

Proportioning and characterization of Portland cement-based ultra-lightweight foam concretes

Effects of Different Lightweight Functional Fillers for Use in Cementitious Composites

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

Contact Info

Product

Resources

About