Thermal insulation material based on SiO2 aerogel

Liu, Zhaohui; Ding, Yi-dong; Wang, Fei; Deng, Zhaohui

doi:10.1016/j.conbuildmat.2016.06.096

Cited by 134 publications

(52 citation statements)

References 7 publications

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“…Silika aerojeller, hidrolik aktive göstermemekle birlikte kendilerine özgü por yapısı ile yüksek düzeydeki hava içeriğine rağmen katı iskeletlerini koruyacak şekilde üretilmektedir [21]. Dünyanın en hafif katısı olarak kabul edilen silika aerojellerin çimento esaslı karışımlarda kullanılması genellikle malzemelerin termal yalıtım [22][23][24][25][26] veya akustik yalıtım [27] performanslarının arttırılması üzerine odaklıdır. Ancak, silika aerojeller %99.8 düzeyine erişebilen por hacmine rağmen kendi kütlelerinin 1600 katı kadar da yük taşıyabilmektedirler [28].…”

Section: B Literatür Taramasıunclassified

“…Liu vd. [24] ise hacimce %60 oranında aerojel içeren numunelerde 2.15 MPa'lık basınç dayanımı ve 0.45 MPa'lık eğilme dayanımı tespit etmişlerdir. Öte yandan, karışımlarında silika aerojelin çimento katkı maddesi olarak kullanımında ise, silika aerojel katkısının düşük içeriği nedeniyle mekanik dayanımlarda genellikle ciddi düzeyde düşüşler görülmemektedir [4].…”

Section: B Literatür Taramasıunclassified

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Mechanical, Pore Structure and Microstructural Properties of Alkali-Activated Fly Ash Mortars Containing Silica Aerogel

Bostancı

2020

Bilecik Şeyh Edebali Üniversitesi Fen Bilimleri Dergisi

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Inclusion of silica aerogels in cement matrix can lead to an enhancement in thermal and acoustic properties of cementbased materials due to the high porosity values of silica aerogel particles. Despite their high porosity values, silica aerogel particles can also show sufficient mechanical performance under stress. In this study, mechanical, pore structure and microstructure properties of alkaliactivated fly ash mortars containing a small amount of silica aerogel powder (0.25% and 0.50% of binder, by weight) were investigated. The results obtained from the experimental study reveal that the compressive toughness and compressive post-peak toughness capacities of fly ash mortars with an average compressive strength of 20 MPa could increase by about 27% and 70%, respectively. Toughness development obtained via the change in the micro and capillary pore formation in the pore structure of the mortar samples presents an innovative design idea for the production of silica aerogelincorporated mortar blocks with improved deformation behavior under equivalent compressive stress.

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Section: B Literatür Taramasıunclassified

Mechanical, Pore Structure and Microstructural Properties of Alkali-Activated Fly Ash Mortars Containing Silica Aerogel

Bostancı

2020

Bilecik Şeyh Edebali Üniversitesi Fen Bilimleri Dergisi

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“…Moreover, in few aerogel particles, the cracked surface of aerogel in the hydrated concrete specimens was noticed (Figure 6 b). Literatures [25,47,48] also indicate the brittleness of aerogel, and the incorporation of aerogel decreases the mechanical performances.…”

Section: Scanning Electronic Microscopy (Sem) Of Cnt-lwacmentioning

confidence: 99%

Effects of Carbon Nanotubes on the Properties of Lightweight Concrete Prepared With Expanded Glass and Hydrophobic Silica Aerogel

Adhikary¹,

Rudžionis²,

Tučkutė³

2020

Preprint

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This study aimed to study the effect of carbon nanotubes on the properties of expanded glass and silica aerogel based lightweight aggregate concrete. CNTs were dispersed in the polycarboxylate superplasticizer added water by ultrasonication energy for 3 minutes. Combinations of expanded glass (55%) and hydrophobic silica aerogel particles (45%) were used as lightweight aggregates. Study results show that the incorporation of MWCNTs significantly influences the mechanical and microstructural performance of aerogel based lightweight concrete. Almost 41% improvement in compressive strength was gained by the addition of carbon nanotubes. SEM image of lightweight concrete shows CNTs were almost dispersed homogeneously within the concrete structure. SEM image of the composite also shows the presence of the C-S-H structure surrounding the CNTs, that confirms the cites of nanotubes for higher growth of C-S-H. Besides, agglomeration of CNTs and the presence of Ettringites observed in the transition zone between the silica aerogel and cementitious materials. Moreover, flowability, water absorption, microscopy, XRD, and semi-adiabatic calorimetry results were analyzed in this study.

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“…일반적으로 유기계 소재는 스티로폼, 우레탄 폼 등이 있으 며, 이들 소재는 우수한 단열특성을 발현하지만 화재·인체 에 취약하다는 단점이 있다 [1,2]. 대표적 무기계 단열소재 인 유리면과 암면 등은 화재에는 강하나, 수분에 취약하여 내구성이 떨어지는 특징도 있다 [3,4].…”

Section: 연구의 목적unclassified

Physical Properties of Calcium Silicate Inorganic Insulation Depending on Curing Time

Park¹,

Chu²,

Jeong³

2016

Journal of the Korea Institute of Building Construction

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Calcium silicate inorganic insulating material is a porous material which is made of 90 wt% of cement. Unlike existing inorganic insulation materials, it is produced without high temperature curing process and also it costs much less than existing inorganic insulation materials. It is an innovative insulation material that supplemented disadvantages of conventional inorganic insulation material. Researches and developments about inorganic insulation materials have been actively researched abroad. Calcium silicate insulation has 0.13g/cm3 of specific gravity. Its heat conductivity is under 0.050W/mK, which it similar to conventional inorganic insulation. However, it has weak compressive strength compared to other inorganic insulation. The point of this research is to manifest that calcium silicate inorganic insulating material can have certain compressive strength after curing process with high insulating performance and to find out the proper curing methods and period.

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Thermal insulation material based on SiO2 aerogel

Cited by 134 publications

References 7 publications

Mechanical, Pore Structure and Microstructural Properties of Alkali-Activated Fly Ash Mortars Containing Silica Aerogel

Mechanical, Pore Structure and Microstructural Properties of Alkali-Activated Fly Ash Mortars Containing Silica Aerogel

Effects of Carbon Nanotubes on the Properties of Lightweight Concrete Prepared With Expanded Glass and Hydrophobic Silica Aerogel

Physical Properties of Calcium Silicate Inorganic Insulation Depending on Curing Time

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