Very-high-performance concrete with ultrafine powders

Long, Guangcheng; Wang, Xinyou; Xie, Youjun

doi:10.1016/s0008-8846(01)00732-3

Cited by 90 publications

(29 citation statements)

References 3 publications

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“…However, Gao et al (2001) showed that the addition of superfine slag could improve the workability. Long et al (2002) observed that the addition of ultrafine fly ash or slag could improve the fluidity of cement paste at low water content. Later, Jones et al (2006) found that the addition of ultrafine fly ash would also increase the flow of mortar.…”

Section: Introductionmentioning

confidence: 99%

Roles of Packing Density and Water Film Thickness in Rheology and Strength of Cement Paste

Kwan

Chen

2012

ACT

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Lowering the water/cementitious materials (W/CM) ratio is the key for the production of high-strength concrete and high-performance concrete, but there is a limit to lowering the W/CM ratio because the water added must be enough to fill the voids between solid particles and form water films coating the solid particles. Hence, an increase in packing density of the cementitious materials would allow a lower W/CM ratio to be adopted. This research aims to evaluate the effects of adding superfine cement (SFC) and condensed silica fume (CSF) on the packing density of cementitious materials, and study the roles of packing density and water film thickness in the rheological properties and compressive strength of cement paste. The results showed that the addition of SFC and/or CSF can significantly increase the packing density and water film thickness, and thereby greatly improve the rheological and strength performances of cement paste.

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Section: Introductionmentioning

confidence: 99%

Roles of Packing Density and Water Film Thickness in Rheology and Strength of Cement Paste

Kwan

Chen

2012

ACT

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“…A linear relationship between the logarithm of conductivity ln(σ) and the degree of hydration α, has been found: ln(σ)=A v -B v xα, where A v depends on the nature and the dosage of the different mineral and organic components, and B v is an invariant related to the granular packing [4]. Guangcheng Longastudied the compactness and fluidity of binary and ternary compound paste systems containing ultrafine powders such as pulverized fly ash, pulverized granulated blast furnace slag and silica fume with reference to relative density index and it was found that silica fume is most effective in improving the relative densities of binary paste systems [5].…”

Section: Optimisation Of the Granular Mixturementioning

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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“…Compressive and Flexural Strengths of chRHA concrete were comparable to a silica fume concrete made with the same replacement level & these strengths were higher than the control and TRHA mixtures. Through the optimization of the proportions of compositions and employing heat treatment, very high performance concrete with large quantities of ultrafine mineral powders such as pulverized fly ash, pulverized granulated blast furnace slag and silica fume was successfully prepared which showed compressive strength upto 200 MPa [58]. High Performance concrete utilizing fly ash and microsilica as cement replacing materials was investigated [59] to study permeation related properties like permeability, porosity and sorptivity with different curing conditions namely moist curing, air curing and curing at 5˚C.…”

Section: Air Entraining Admixturementioning

confidence: 99%

A Survey of High Performance Concrete Developments in Civil Engineering Field

Patel¹,

Shah²

2013

OJCE

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High Performance concrete (HPC) has received increased attention in the development of infrastructure Viz., Buildings, Industrial Structures, Hydraulic Structures, Bridges and Highways etc. leading to utilization of large quantity of concrete. This paper presents a comprehensive coverage of High Performance concrete developments in civil engineering field. It highlights the High Performance concrete features and requirements over conventional concrete. Furthermore, recent trends with regard to High Performance Concrete development in this area are explored. This paper also includes effect of Mineral and Chemical Admixtures used to improve performance of concrete.

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Very-high-performance concrete with ultrafine powders

Cited by 90 publications

References 3 publications

Roles of Packing Density and Water Film Thickness in Rheology and Strength of Cement Paste

Roles of Packing Density and Water Film Thickness in Rheology and Strength of Cement Paste

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

A Survey of High Performance Concrete Developments in Civil Engineering Field

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