Drying shrinkage of fibre-reinforced lightweight aggregate concrete containing fly ash

Kayali, Obada; Haque, M N; Zhu, Bin

doi:10.1016/s0008-8846(99)00179-9

Cited by 146 publications

(76 citation statements)

References 3 publications

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“…Therefore, the higher drying shrinkage of light weight hybrid composites than that of premix mortar is due to higher cement content, lower sand content and higher water/cement ratio. Similar results are also reported by Kayali et al [12] where the drying shrinkage of light weight FRC was found twice as compared to normal weight concrete. The light weight hybrid composites containing FL1 type light weight sand exhibited slightly higher drying shrinkage than the one containing FL0 type light weight sand.…”

Section: Resultssupporting

confidence: 90%

Restrained Shrinkage-Induced Cracking of Light Weight High Performance Fiber Reinforced Cementitious Composites

Shaikh¹,

Mihashi²

2009

American J. of Engineering and Applied Sciences

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Problem statement: Shrinkage induced cracking cause damage to reinforced concrete structures. An experimental study was conducted on restrained shrinkage test of cement mortar and light weight High Performance Fiber Reinforced Cementitious Composites (HPFRCC). Approach: Two types of light weight HPFRCC and a premix mortar containing small amount of fiber were included in the experiment. Results: Results showed the multiple cracks, as many as 49, in light weight HPFRCC specimens compared to few cracks (about six cracks) in the premix mortar specimen. At the end of shrinkage test, the width of the cracks in the mortar specimen was more than 250 µm with the largest crack width of about 400 µm. However, the scenario was quite different in light weight HPFRCC specimens, where the width of almost all cracks was less than 100 µm. Conclusion: The higher number of multiple cracks with small cracks width in light weight HPFRCC specimens due to drying shrinkage was due to their strain hardening and ductile behavior compared to quasi brittle behavior of premix mortar where less number of wide cracks was observed.

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Section: Resultssupporting

confidence: 90%

Restrained Shrinkage-Induced Cracking of Light Weight High Performance Fiber Reinforced Cementitious Composites

Shaikh¹,

Mihashi²

2009

American J. of Engineering and Applied Sciences

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“…For high-strength LWAFRC, the bers did not signicantly contribute to the compressive strength [21]. In addition, there was no signi cant increase in the compressive strength of the hardened lightweight self-compacting concrete due to the addition of polypropylene bers [22].…”

Section: Compressive Strengthmentioning

confidence: 92%

“…Specimens with diameter sizes varying from 76, 100, 150, and 200 mm increased in splitting tensile strength of 134%, 33%, 12%, and 0%, respectively, for normal concrete and 127%, 165%, 44%, and 29% for lightweight concrete, respectively [11]. Fiber reinforcement signi cantly increases the tensile strength of lightweight aggregate concrete [21].…”

Section: Splitting Tensile Strengthmentioning

confidence: 98%

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State-of-the-Art Report on Fiber-Reinforced Lightweight Aggregate Concrete Masonry

Rico

Farshidpour

Tehrani

2017

Advances in Civil Engineering

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Masonry construction is the most widely used building method in the world. Concrete masonry is relatively low in cost due to the vast availability of aggregates used within the production process. ese aggregate materials are not always reliable for structural use. One of the principal issues associated with masonry is the brittleness of the unit. When subject to seismic loads, the brittleness of the masonry magni es. In regions with high seismic activity and unspeci ed building codes or standards, masonry housing has developed into a death trap for countless individuals. A common approach concerning the issue associated with the brittle characteristic of masonry is addition of steel reinforcement. However, this can be expensive, highly dependent on skillfulness of labor, and particularly dependent on the quality of available steel. A proposed solution presented in this investigation consists of introducing steel bers to the lightweight aggregate concrete masonry mix. Previous investigations in the eld of lightweight aggregate ber-reinforced concrete have shown an increase in exural strength, toughness, and ductility. e outcome of this research project provides invaluable data for the production of a ductile masonry unit capable of withstanding seismic loads for prolonged periods.

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“…Moreover, the lightweight aggregate concrete becomes more brittle as its strength increases making its engineering application subject to many restrictions. Numerous studies at home and abroad (O Kayali et al, 1999;Hua, 1998;Ding & Yang, 2006;Liu et al, 2009) have shown that high elastic modulus steel fibers, compared with low elastic modulus steel fibers, can effectively suppress the shrinkage crack of lightweight aggregate concrete, and can increase the tensile strength and toughness of concrete. However, synthetic fibers such as PP play a unique role in solving early-stage plastic cracking and reducing the drying shrinkage and deformation of concrete.…”

Section: Introductionmentioning

confidence: 99%

An Orthogonal Test of Steel-polypropylene Hybrid Fiber Lightweight Aggregate Concrete

Li¹,

Li²,

Liu³

2017

dtmse

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Using orthogonal test, cubic anti-pressure test and splitting tension strength test were carried out on 9 groups of steel-polypropylene (PP) hybrid fiber lightweight aggregate concrete and 1 group of standard lightweight aggregate concrete, in order to explore the impacts of steel fiber content, length-diameter ratio of PP, and PP content on light aggregate concrete's mechanical performance. Based on the test results, an optimum mix ratio of steel-PP hybrid fiber lightweight aggregate concrete has been found.

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Drying shrinkage of fibre-reinforced lightweight aggregate concrete containing fly ash

Cited by 146 publications

References 3 publications

Restrained Shrinkage-Induced Cracking of Light Weight High Performance Fiber Reinforced Cementitious Composites

Restrained Shrinkage-Induced Cracking of Light Weight High Performance Fiber Reinforced Cementitious Composites

State-of-the-Art Report on Fiber-Reinforced Lightweight Aggregate Concrete Masonry

An Orthogonal Test of Steel-polypropylene Hybrid Fiber Lightweight Aggregate Concrete

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