A review on ultra high performance concrete: Part I. Raw materials and mixture design

2015 ◽  
Vol 101 ◽  
pp. 741-751 ◽  
Author(s):  
Caijun Shi ◽  
Zemei Wu ◽  
Jianfan Xiao ◽  
Dehui Wang ◽  
Zhengyu Huang ◽  
...  
Keyword(s):  
High Performance ◽  
High Performance Concrete ◽  
Raw Materials ◽  
Mixture Design ◽  
Ultra High Performance Concrete ◽  
Concrete Part

Mechanical Properties and Durability of Ultra-High Performance Concrete Incorporating Coarse Aggregate

2014 ◽  
Vol 629-630 ◽  
pp. 96-103 ◽  
Author(s):  
Juan Yang ◽  
Gai Fei Peng ◽  
Yu Xin Gao ◽  
Hui Zhang
Keyword(s):  
Compressive Strength ◽  
High Performance ◽  
Coarse Aggregate ◽  
High Performance Concrete ◽  
Fresh Concrete ◽  
Raw Materials ◽  
Autogenous Shrinkage ◽  
Mineral Admixtures ◽  
Ultra High Performance Concrete ◽  
Spalling Failure

Ultra-high performance concrete (UHPC) incorporating coarse aggregate was prepared with common raw materials. Fresh concrete had excellent good workability with slump of 265 mm and slump spread of 673 mm. Compressive strength of UHPC at 56 d reached 150 MPa. However, UHPC exhibited high brittleness in terms of spalling failure which occurred during compression loading.The ratio of splitting tensile strength to compressive strength of about 1/18 and the ratio of flexural strength to compressive strength of about 1/14 at 56 d were also associated with the brittleness of UHPC in this research. Mineral admixtures and fluidity of fresh concrete influenced compressive strength of UHPC significantly. Moreover, UHPC had excellent permeation-related durability but considerable shrinkage. Autogenous shrinkage of UHPC was less than half of free shrinkage, for which the reason is unknown and needs further research.

Mixture design methods for ultra-high-performance concrete - a review

2021 ◽  
Vol 124 ◽  
pp. 104242
Author(s):  
Min Zhou ◽  
Zemei Wu ◽  
Xue Ouyang ◽  
Xiang Hu ◽  
Caijun Shi
Keyword(s):  
High Performance ◽  
High Performance Concrete ◽  
Mixture Design ◽  
Design Methods ◽  
Ultra High Performance Concrete

scholarly journals Synthesis of Modified Polycarboxylate and Its Application in Ultra-High Performance Concrete

2021 ◽  
Vol 8 ◽  
Author(s):  
Shuncheng Xiang ◽  
Yansheng Tan ◽  
Yingli Gao
Keyword(s):  
Silica Fume ◽  
High Performance ◽  
Chain Transfer ◽  
High Performance Concrete ◽  
Raw Materials ◽  
Synthesis Method ◽  
Drying Shrinkage ◽  
Polymerization Reaction ◽  
Ultra High Performance Concrete ◽  
Initiation System

Modified polyurethane prepolymer was prepared using the segmental synthesis method. Then, pectiniform polycarboxylate was synthesized at normal temperature in the complex initiation system of H2O2, APS, sodium bisulfite, Vc, and Rongalit according to the free radical polymerization reaction mechanism, using TPEG, AA, and PEG as raw materials and TGA as the chain transfer agent. Compared with commercial Sika polycarboxylate, its flowability, strength, drying shrinkage, and auto-shrinkage were studied. The experimental results show that the synthesized polycarboxylate could be better dispersed. Adding silica fume can enhance the compressive strength of ultra-high performance concrete (UHPC), while slag may decline its strength. By incorporating slag and silica fume, the drying shrinkage of UHPC was reduced, but its auto-shrinkage was increased.

scholarly journals Advanced composite structure combining Ultra high performance concrete with normal reinforced concrete

2019 ◽  
Vol 278 ◽  
pp. 03004
Author(s):  
Xiangguo Wu
Keyword(s):  
Reinforced Concrete ◽  
Material Properties ◽  
Composite Structure ◽  
Composite Structures ◽  
High Performance ◽  
High Performance Concrete ◽  
Raw Materials ◽  
Constitutive Relations ◽  
Ultra High Performance Concrete ◽  
Advanced Composite

Ultra high performance concrete (UHPC), one of the newest cementitious composites, demonstrates superior ductility with high strength and durability, which has gained the attention of researchers and engineers since it was successfully developed. Considering its superior ductility and durability, UHPC is a good alternative material for forming a advanced composite structure with normal reinforced concrete (RC) or prestressed concrete. The material properties are critical for its application in composite structures, so in this chapter, material properties of UHPC, such as constitute raw materials, mechanical properties, durability and several constitutive relations from several standards are firstly introduced. The basic concepts of advanced UHPC-RC composite structures, such as UHPC-RC composite beam, composite column, composite wall, etc, are introduced finally.

Development of Ultra High Performance Concrete Using Fly Ash

2020 ◽  
Vol 987 ◽  
pp. 33-38
Author(s):  
Rudolf Hela ◽  
Lenka Bodnárová
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Experimental Work ◽  
High Performance ◽  
High Performance Concrete ◽  
Raw Materials ◽  
Economic Cost ◽  
Ultra High Performance Concrete ◽  
Secondary Raw Materials ◽  
Successful Design

The experimental work presented in this article examines the possibility of lowering the economic cost of UHPC. The UHPC were designed using the Linear Packing Density Model. After 7 days, the UHPC compressive strength exceeded 120 MPa. Level of compressive strength after 90 days reaching 150 MPa had been obtained with a lower dose of cement (700 kg/m3) and with the use of secondary raw materials (fly ash), without the use of dispersed reinforcement. The successful design and production proved that the use of secondary raw materials is possible, thereby decreasing the economic cost of UHPC production.

scholarly journals Study on Optimization of Working Performance of Ultra High Performance Concrete

2020 ◽  
Vol 198 ◽  
pp. 01005
Author(s):  
Wang Shengyu ◽  
Zhan Yijian
Keyword(s):  
Water Consumption ◽  
High Performance ◽  
High Performance Concrete ◽  
Raw Materials ◽  
High Sensitivity ◽  
Ultra High Performance Concrete ◽  
Influence Of Water ◽  
Binder Ratio ◽  
Viscosity Reducer ◽  
Physical And Chemical

The water binder ratio is a key parameter in the mix design of ultra-high performance concrete. Aiming at the high sensitivity of ultra-high performance concrete to water consumption, the influence of water consumption on the performance of ultra-high performance concrete was studied in a narrow range. The compatibility ratio of raw materials of ultra-high performance concrete can be adjusted, but the space is small, so we try to improve the fluidity of concrete by physical and chemical means. The experimental results show that the fluidity of concrete increases slightly with the addition of glass beads, but the flexural properties of the concrete are adversely affected. With the addition of viscosity reducer, the workbility of concrete increases, but the compressive strength decreases.

Use of Textile Reinforced Concrete – Especially for Facade Panels

2014 ◽  
Vol 923 ◽  
pp. 142-145 ◽  
Author(s):  
Magdaléna Novotná ◽  
Michaela Kostelecká ◽  
Julie Hodková ◽  
Miroslav Vokáč
Keyword(s):  
Reinforced Concrete ◽  
High Performance ◽  
High Performance Concrete ◽  
Raw Materials ◽  
Textile Reinforced Concrete ◽  
Ultra High Performance Concrete ◽  
Concrete Element ◽  
Minimum Thickness ◽  
Fine Grained ◽  
Environmental Savings

In recent years, textile reinforced concrete (TRC) is at the beginning of industrial production mainly in Germany and relates especially to facade panels and concrete footbridges. The subtle panels with a minimum thickness of coverage layer can be designed due to the textile reinforcement, which is resistant to corrosion. Furthermore, a long durability is expected in case of these structures. The textile reinforcement with the fine-grained ultra-high performance concrete (UHPC) enables to produce concrete elements with a minimum thickness. Therefore, the concrete element with up to 70 % lower weight compared to element with conventional reinforcement can be produced and significant environmental savings can be achieved (reducing the consumption of non-renewable raw materials, transport energy, reduced dead load acting on the supporting structure, etc.).

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