Influence of fibrous additives on properties of aerated autoclaved concrete forming mixtures and strength characteristics of products

Laukaitis, A.; Kerienė, Jadvyga; Mikulskis, Donatas; Sinica, Marijonas; Sezemanas, Georgijus

doi:10.1016/j.conbuildmat.2009.04.007

Cited by 38 publications

(17 citation statements)

References 30 publications

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“…The authors observed that hybrid fibers can significantly improve the toughness, flexural impact performance and fracture properties of concrete compared to that of single fiber addition. Laukaitis et al [25] investigated the influence of micro fibrous additives (carbon, poly-propylene, basalt, kaoline) on properties of aerated autoclaved concrete forming mixtures and strength characteristics of the developed products.…”

Section: Rudolph and Valormentioning

confidence: 99%

Mechanical behavior of sustainable hybrid-synthetic fiber reinforced cellular light weight concrete for structural applications of masonry

Rasheed

Prakash

2015

Construction and Building Materials

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Cellular light weight concrete (CLC) masonry has gained tremendous popularity in recent decades owing to its sustainability, density, low thermal conductivity and use of less mortar joints. The objective of this study is to develop a high performance fiber reinforced cellular concrete to provide a better alternative than aerated autoclaved concrete blocks for structural applications of masonry. Use of micro-fibers (Fibrillated) enhances pre-cracking behavior of masonry by arresting cracks at micro-scale, while Macro (structural) fibers induce ductile behavior in post-peak region by arresting the crack propagation soon after the crack initiation. In particular, the mechanical behavior of CLC cylinders under pure compression and CLC blocks under flexure with and without polyolefin structural fiber reinforcement as well as hybrid fiber reinforcement is investigated. Test results indicate that the addition of structural fibers improved the compressive strength upto 66.8% for 0.55% volume fraction. Post-peak ductility improved upto a factor of nine in case of compression for 0.55% volume fraction. Similarly, it resulted in 15.31% increase of post-peak flexural ductility by a hybrid addition of 0.44% and 0.02% volume fraction of macro and micro fibers respectively. Hybrid fiber reinforcement enhanced the peak strength and ductility which indicated better crack bridging both at micro and macro levels.

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Section: Rudolph and Valormentioning

confidence: 99%

Mechanical behavior of sustainable hybrid-synthetic fiber reinforced cellular light weight concrete for structural applications of masonry

Rasheed

Prakash

2015

Construction and Building Materials

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“…For silicate matrix composites, the use of unidirectional or randomly orientated chopped alkali‐resistant glass and ceramic fibers for different soda lime glass matrices has also been reported in literature. The polymeric, metallic, and natural fibers such as polypropylene (PP), polyamide, steel, and cellulosic fibers can also be used to improve the impact properties of such brittle matrices. However, the selection of the reinforcing fiber is an important factor for use in both silicate and glass matrices as the fibers need to withstand both local highly alkaline environments during processing and ultraviolet (UV) radiations during their expected service life.…”

Section: Introductionmentioning

confidence: 99%

Effect of alkali and ultraviolet aging on physical, thermal, and mechanical properties of fibers for potential use as reinforcing elements in glass/silicate composites

Akonda

Kandola

Horrocks

2011

Polymers for Advanced Techs

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This work reports the effect of an alkaline environment and ultraviolet (UV) radiation on the physical, thermal, and tensile properties of different fibers selected as potential reinforcing elements to enhance the impact properties of brittle glass/silicate composites. The fibers, which included regenerated cellulosic (viscose and rayon), synthetic (ultrahigh molecular weight polyethylene, polypropylene, polyamide, acrylic), glass, ceramic, and steel, were aged in different alkaline solutions with pH ranging from 11.1 to 13.6 at 70°C for different periods of time and exposed to UV radiation for 330 h. The physical and thermal properties of aged fibers were studied using tensile testing, scanning electron microscopy, and simultaneous differential and thermogravimetric analysis. Results showed that the regenerated cellulosic fibers, acrylic, E‐glass, and A‐glass fibers could not withstand the highly alkaline environment. Overall, ultrahigh molecular weight polyethylene, UV‐stable polypropylene, polyamide 6.6, AR‐glass, ceramic (alumino borosilicate), and steel fibers performed very well under all conditions, indicating that they have the potential to be used as reinforcing elements in glass/silicate composites. Copyright © 2011 John Wiley & Sons, Ltd.

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“…It was found that the spreadability, temperature and plasticity strength depend on water temperature, water and solids ratio and activity of the forming mixture. The influence of fibers of different type and length on the properties of AAC forming mixtures was studied in [7,8,12,16]. It was found that 0.1 % (counting of solids mass) of mechanically untreated CF leads to the decrease of spreadability or temperature of the forming mixtures accordingly by 3.5 % and 10.2 %, or by 1.0 % and 1.5 %, expansion in one case increased by 8.0 % [7], otherwise decreased by 7.1 % [16], while plasticity strength increased accordingly by 116.7 % and 114.3 %.…”

Section: Discussionmentioning

confidence: 99%

Investigations of Forming Mixture Parameters of Autoclaved Aerated Concrete with Nanoadditives

Lekūnaitė

Laukaitis

Kligys

et al. 2012

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Impact of some nanoadditives, such as amorphous SiO₂ (AS) of pozzolanic properties and carbon fibers (CF) reduced to nanosize particles on autoclaved aerated concrete (AAC) forming mixtures, the following parameters were investigated: changes in consistence of binding material during hydration, spreadability, expansion and temperature of mixture, plasticity strength. The investigations were carried out with AAC forming mixture where 10 % lime was replaced by equivalent content of Portland cement. Upon completion of investigations, it was established that the optimal replacement of sand by AS was 1.0 % resulting in increase of temperature of AAC forming mixture by up to 2.1 %, expansion by up to 11.0 %, ultrasonic impulse velocity (UIV) by up to 3.0 % and plasticity strength by up to 271.4 %. Meanwhile the optimal replacement of sand by CF was 0.1 % resulting in decrease in temperature of AAC forming mixture by up to 1.5 %, expansion by up to 16.0 % and increase in UIV by up to 2.0% and plasticity strength by up to 152.9 %.

DOI: http://dx.doi.org/10.5755/j01.ms.18.3.2441

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Influence of fibrous additives on properties of aerated autoclaved concrete forming mixtures and strength characteristics of products

Cited by 38 publications

References 30 publications

Mechanical behavior of sustainable hybrid-synthetic fiber reinforced cellular light weight concrete for structural applications of masonry

Mechanical behavior of sustainable hybrid-synthetic fiber reinforced cellular light weight concrete for structural applications of masonry

Effect of alkali and ultraviolet aging on physical, thermal, and mechanical properties of fibers for potential use as reinforcing elements in glass/silicate composites

Investigations of Forming Mixture Parameters of Autoclaved Aerated Concrete with Nanoadditives

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