Mechanical properties of reactive powder concretes

Dugat, J.; Roux, N.; Bernier, G.

doi:10.1007/bf02485945

Cited by 148 publications

(81 citation statements)

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“…Application of pre-setting pressure nearly doubled compressive strength of the samples [7].Dugat applied 60 MPa pre-setting pressure to RPC800 along with heat treatment cure (90ºC and 250ºC). Consequently, they reached compressive strength of about 500 MPa and Young's modulus of 36 -74 GPa [8].…”

Section: 3mentioning

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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Section: 3mentioning

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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“…UHPFRC has a broad application prospect, which can be widely used in several environments [1]. In pursuit of excellent properties of UHPFRC, some methods including reducing water-cement ratio [1], adding reactive powders [2], and adding compound chemical admixtures were carried out.…”

Section: Introductionmentioning

confidence: 99%

Effect of Curing Conditions on the Shrinkage of Ultra High‐Performance Fiber‐Reinforced Concrete

Han

Cui

Huang

et al. 2018

Advances in Civil Engineering

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e effect of curing conditions on the early age and long-term shrinkage of ultra high-performance fiber-reinforced concrete (UHPFRC) was systematically studied. e shrinkage of the early age (0-168 h) and long-term age (0-90 d) of UHPFRC material was measured based on three kinds of humidity conditions (dry, sealed, and soaked) and curing temperatures (25°C, 40°C, and 75°C), respectively. In this paper, the hydration degree of different shrinkage stages was studied in combination with chemicalbound water experiment. Meanwhile, the influencing mechanism of curing condition on the shrinkage of UHPFRC was analyzed.e results show that the early shrinkage rate of UHPFRC is accelerated with the increase of temperature, and the rate of shrinkage development at the latter stage is suppressed with the increase of temperature. With the increase of humidity, the early age shrinkage of UHPFRC and its increasing rate gradually decrease, which means drying condition > sealing condition > soaking condition. According to the long-term shrinkage results, increasing temperature has very significant inhibiting effect on the UHPFRC shrinkage in the sealed condition. Due to the majority of the in-site components of UHPFRC cured in the sealed condition, high-temperature curing has evident inhibition of early age shrinkage of UHPFRC. erefore, promoting curing temperature is fairly effective at inhibiting the early age shrinkage of UHPFRC for the in-site structures.

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“…Reaktif pudra betonu (RPB) ise basınç dayanımı 150 ile 800 MPa arasında, çekme dayanımı 25 ile 150 MPa arasında, kırılma enerjisi yaklaşık 30000 J/m2, elastisite modülü 50000 ile 75000 MPa arasında ve birim ağırlığı 2500-3000 kg/m3 değerleri arasında olan bir beton türüdür. Bu özellikleri ile RPB'ler üstün mekanik ve fiziksel özeliklere, mükemmel sünekliğe ve çok düşük geçirimliliğe sahip ultra yüksek dayanımlı çimento esaslı kompozit olmuştur [1,2]. RPB, normal betondan farklı olarak, homojenliğin arttırılması için mikro boyuttaki tanelerin kullanımı, tane dağılımın betonda en az boşluk oluşturacak şekilde düzenlenmesi, puzolanik aktivitenin en üst düzeyde gerçekleşmesi için SD kullanılması ve sıcak kür uygulanmasıyla üretilmiştir [1].…”

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