The Study of Bond Strength and Bond Durability of Reactive Powder Concrete

Mg, Lee; Chiu, C-T; Yc, Wang

doi:10.1520/jai12960

Cited by 30 publications

(15 citation statements)

References 2 publications

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“…Test results from Lee et al [11] revealed that UHPC specimen (5 cm × 10 cm cylinder) was still in good condition after 600 cycles of freezing and thawing in accordance with ASTM C 666-97. After freezing and thawing test, the non-shrinkage high strength mortar showed a reduction in compressive strength, slant shear strength, steel pull out strength, and dynamic modulus by 17, 21, 24, and 25 %, compared with the corresponding values of 6, 7, 5, and 10 %, respectively, for UHPC.…”

Section: Uhpc Precast Concrete Under Severe Freeze-thaw Conditionsmentioning

confidence: 65%

UHPC Precast Concrete under Severe Freeze-Thaw Conditions

Lee¹,

Lee²,

Huang³

et al. 2013

IJET

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Abstract-In this study, ultra high performance concrete (UHPC) was used to investigate the effect of UHPC and its precast product by the severe freeze-thaw testing. The UHPC to be used as a precast product material contains a large amount of cement and cementitious materials, a large amount of superplasticizer, and a very small amount of water. The UHPC mixes with eight different volumes of steel fibres were tested and evaluated to find the optimum quality of precast production. The results show that the mechanical properties of UHPC possess high strength, ductility, and bond stress. The results also indicate that most of UHPC specimens presented a steady decrease in compressive and flexural strength after freeze-thaw testing. The 2.5, 3.0 and 3.5% steel fibres by volume were chosen and used in UHPC precast products, after UHPC specimens were tested and finished on their performance evaluations. The results show that the loading capacity of UHPC precast products increased significantly after 600 free-thaw cycles. As a result of freeze-thaw resistance, the appropriate mixes of UHPC applied in the precast products have been obtained; it would provide a reference manufacturing for the UHPC products.Index Terms-UHPC, freeze-thaw, precast product, ultra high performance concrete.

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Section: Uhpc Precast Concrete Under Severe Freeze-thaw Conditionsmentioning

confidence: 65%

UHPC Precast Concrete under Severe Freeze-Thaw Conditions

Lee¹,

Lee²,

Huang³

et al. 2013

IJET

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“…HSM showed a reduction in compressive strength, slant shear strength, steel pull out strength, and dynamic modulus by 17, 21, 24, and 25 %, compared with the corresponding values 6, 7, 5, and 10 %, respectively for RPC. For NSC, the average values of relative dynamic modulus of elasticity based on resonant frequencies after 300 and 600 freeze-thaw cycles were 75 and 55 %, compared with the corresponding values of 96 and 92 %, respectively for RPC [13]. Ming-Gin Lee has alsoreported that the effects of compressive and flexural strengthening with bonding RPC of 10 mm thickness are about 200 % and 150 % more than those of NSC.…”

Section: Rpc As a Repair Materialsmentioning

confidence: 92%

“…Ming-Gin Lee evaluated samples with basic composition for compressive strength, bond strength (slant shear test), steel pull out strength, relative dynamic modulus, NDT tests; before and after accelerated aging [13]. Zhang Yunsheng prepared green RPC (C200 GRPC) with compressive strength of 200 MPa.…”

Section: Influence Of Curing Conditionsmentioning

confidence: 99%

A State of the Art Report on Ultra High Performance Concrete: Reactive Powder Concrete

Bhusari¹,

S²

2017

IOSR JEN

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Abstract:-There has been continuous demand for materials with higher compressive strength for various civil engineering applications. Reactive powder concrete (RPC) has been developed to overcome the weakness of most high strength concrete available with compressive strength in the range of 60-100 MPa. RPC was developed from a special combination of constituent materials such as Portland cement, silica fume, quartz flour, fine silica sand, high-range water-reducer, water and steel fibers wherein attempts have been made to remove the coarse aggregate particles to make a very strong mortar with a very low water cement ratio. This paper presents a state of the art report reviewing the research in the area of the development of RPC, highlighting the enhanced performance in the mechanical properties of RPC in direct application of its use in structural members requiring high standards of strength coupled with superior performance and durability.

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“…The following sequence in mixing RPC is based on previous studies (Bonneau et al, 1997;Chan and Chu, 2004;Feylessoufi et al, 2001;Lee and Chisholm, 2005;Morin et al, 2002;Shaheen and Shrive, 2006), as well as our own trial-anderror approaches:…”

Section: Mixing Sequencementioning

confidence: 99%

Microstructural behaviour of reactive powder concrete under different heating regimes

Tam

2012

Magazine of Concrete Research

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Reactive powder concrete is an ultra-high-performance concrete which has good mechanical properties and durability. The major difference between reactive powder concrete and conventional concrete is that no coarse aggregate is involved in reactive powder concrete, but crushed quartz and quartz sand are used instead, with a high dosage of silica fume. Heat treatment is a well-known method that can further improve the performance of reactive powder concrete. This paper examines the optimal duration under heat treatment with each pre-determined temperature for reactive powder concrete. Heat treatment with temperatures of 1008C, 1508C, 2008C and 2508C and durations of 8 h, 16 h and 24 h are used for testing. It is found that when the heat-treatment temperature increases, the optimal duration for maximising compressive strength will be longer. The heat-treatment temperature is also positively correlated with the compressive strength of reactive powder concrete. The microstructural behaviour of the effect on heat-treatment temperature and the duration on compressive strength is explored by scanning electron microscope and energy dispersive X-ray spectroscopy. It is shown that the heating duration has a positive effect on the quality and quantity of crystal formation while heating temperature affects the types of crystal formed.

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The Study of Bond Strength and Bond Durability of Reactive Powder Concrete

Cited by 30 publications

References 2 publications

UHPC Precast Concrete under Severe Freeze-Thaw Conditions

UHPC Precast Concrete under Severe Freeze-Thaw Conditions

A State of the Art Report on Ultra High Performance Concrete: Reactive Powder Concrete

Microstructural behaviour of reactive powder concrete under different heating regimes

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