Preparation of Ultra-High Performance Concrete Using Phosphorous Slag Powder

2013 ◽  
Vol 357-360 ◽  
pp. 588-591 ◽  
Author(s):  
Yan Zhou Peng ◽  
Jin Huang ◽  
Jin Ke
Keyword(s):  
Silica Fume ◽  
High Performance ◽  
High Performance Concrete ◽  
Mineral Admixtures ◽  
Ultra High Performance Concrete ◽  
Slag Powder ◽  
Binder Ratio ◽  
Reactive Powder ◽  
Phosphorous Slag ◽  
Water Binder Ratio

Reactive powder concrete (RPC) is an ultra-high performance concrete (UHPC). Cement and silica fume content of RPC are generally rather high compared to the conventional concrete. The aim of this paper is to decrease the cement content of RPC by using phosphorous slag powder. Firstly the effect of grinding time on the activity index of phosphorous slag was investigated. And then, the mix proportion design of this UHPC containing phosphorous slag powder and silica fume was done through orthogonal design. The results indicate that the utilization of phosphorous slag powder in RPC is feasible when the dosage of phosphorous slag powder is about 35% (by weight of the binder) and the water-binder ratio is less than 0.18. By substituting phosphorous slag powder for a part of cement and keeping the water-binder ratio at about 0.14, UHPC specimens whose content of mineral admixtures, including phosphorous slag powder and silica fume, was about 40%~50% (by weight of the binder) were obtained after they had been cured in 80 °C water for 72 hours. The compressive and flexural strength of those specimens was more than 150 MPa and 20 MPa respectively.

Preparation of Reactive Powder Concrete Having High Volume of Phosphorous Slag Powder and Silica Fume

2013 ◽  
Vol 738 ◽  
pp. 157-160 ◽  
Author(s):  
Heng Sun ◽  
Yan Zhou Peng ◽  
Jun Feng Tang ◽  
Nian Li
Keyword(s):  
Silica Fume ◽  
High Performance ◽  
High Performance Concrete ◽  
High Volume ◽  
Reactive Powder Concrete ◽  
Reactive Component ◽  
Slag Powder ◽  
Binder Ratio ◽  
Reactive Powder ◽  
Water Binder Ratio

As an ultra-high performance concrete, reactive powder concrete (RPC) has broad practical application prospects. In this paper, phosphorus slag (PS) powder is utilized as one reactive component to prepare RPC. The effect of the PS content and water-binder ratio on the strength (flexure and compression) of concrete mixtures containing PS and silica fume (SF) is investigated. The results show that utilization of PS powder and SF in RPC production is feasible. RPC samples whose content of PS was about 30%-35% (by weight of binder) and water-binder ratio (W/B) was 0.16 were prepared after they had been cured at 95°C for 3 days. The compressive and flexural strength of those samples was 21.2 MPa and 142.2 MPa respectively.

Study on the Workability of High Performance Concrete Mixture with Compound Mineral Admixtures

2013 ◽  
Vol 671-674 ◽  
pp. 1839-1843
Author(s):  
Yuan Gang Wang ◽  
Chao Wan ◽  
Kai Jian Huang ◽  
Gao Qin Zhang ◽  
Ya Feng Hu
Keyword(s):  
High Performance ◽  
High Performance Concrete ◽  
Orthogonal Experiment ◽  
Steel Slag ◽  
Mineral Admixtures ◽  
Impact Factors ◽  
Slag Powder ◽  
Granulated Blast Furnace Slag ◽  
Binder Ratio ◽  
Water Binder Ratio

Several compound mineral admixtures, such as steel slag powder, granulated blast furnace slag powder and silica fume, are mixed with proper proportion to improve the workability of High Performance Concrete（HPC）. Through the orthogonal experiment, workability of HPC is analyzed on water-binder ratio, sand ratio, the amount of superplasticizer and the amount of compound mineral admixtures. Results show that: workability of HPC was significantly effected by the amount of naphthalene sulphonate water-reducing admixture and water-binder ratio, the amount of compound mineral admixtures and sand ratio are impact factors on the workability in a certain extent.

scholarly journals Mechanical Properties and Environmental Evaluation of Ultra-High-Performance Concrete with Aeolian Sand

Materials ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3148 ◽  
Author(s):  
Hongyan Chu ◽  
Fengjuan Wang ◽  
Liguo Wang ◽  
Taotao Feng ◽  
Danqian Wang
Keyword(s):  
Compressive Strength ◽  
Environmental Impact ◽  
Young’S Modulus ◽  
High Performance ◽  
High Performance Concrete ◽  
Young's Modulus ◽  
Ultra High Performance Concrete ◽  
Aeolian Sand ◽  
Binder Ratio ◽  
Water Binder Ratio

Ultra-high-performance concrete (UHPC) has received increasing attention in recent years due to its remarkable ductility, durability, and mechanical properties. However, the manufacture of UHPC can cause serious environmental issues. This work addresses the feasibility of using aeolian sand to produce UHPC, and the mix design, environmental impact, and mechanical characterization of UHPC are investigated. We designed the mix proportions of the UHPC according to the modified Andreasen and Andersen particle packing model. We studied the workability, microstructure, porosity, mechanical performance, and environmental impact of UHPC with three different water/binder ratios. The following findings were noted: (1) the compressive strength, flexural strength, and Young’s modulus of the designed UHPC samples were in the ranges of 163.9–207.0 MPa, 18.0–32.2 MPa, and 49.3–58.9 GPa, respectively; (2) the compressive strength, flexural strength, and Young’s modulus of the UHPC increased with a decrease in water/binder ratio and an increase in the steel fibre content; (3) the compressive strength–Young’s modulus correlation of the UHPC could be described by an exponential formula; (4) the environmental impact of UHPC can be improved by decreasing its water/binder ratio. These findings suggest that it is possible to use aeolian sand to manufacture UHPC, and this study promotes the application of aeolian sand for this purpose.

scholarly journals Matrix Optimization of Ultra High Performance Concrete for Improving Strength and Durability

Materials ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 6944
Author(s):  
Julio A. Paredes ◽  
Jaime C. Gálvez ◽  
Alejandro Enfedaque ◽  
Marcos G. Alberti
Keyword(s):  
Silica Fume ◽  
High Performance ◽  
Mercury Intrusion Porosimetry ◽  
High Performance Concrete ◽  
Silica Sand ◽  
Nano Silica ◽  
Ultra High Performance Concrete ◽  
Matrix Optimization ◽  
Binder Ratio ◽  
Strength And Durability

This paper seeks to optimize the mechanical and durability properties of ultra-high performance concrete (UHPC). To meet this objective, concrete specimens were manufactured by using 1100 kg/m3 of binder, water/binder ratio 0.20, silica sand and last generation of superplasticizer. Silica fume, metakaolin and two types of nano silica were used for improving the performances of the concrete. Additional mixtures included 13 mm long OL steel fibers. Compressive strength, electrical resistivity, mercury intrusion porosimetry tests, and differential and thermogravimetric thermal analysis were carried out. The binary combination of nano silica and metakaolin, and the ternary combination of nano silica with metakaolin and silica fume, led to the best performances of the UHPC, both mechanical and durable performances.

Study on Carbonization Test of Manufactured Sand Concrete

2013 ◽  
Vol 423-426 ◽  
pp. 1036-1040
Author(s):  
Da Zhen Xu ◽  
Gu Hua Li ◽  
Zhuang Zhi Liao ◽  
Hai Wei Yan
Keyword(s):  
High Performance ◽  
High Performance Concrete ◽  
Mineral Admixtures ◽  
Test Results ◽  
Carbonation Depth ◽  
Manufactured Sand ◽  
Carbonation Resistance ◽  
Binder Ratio ◽  
The Impact ◽  
Water Binder Ratio

To study the impact of mineral admixtures and water-binder ratio on carbonization resistance of high performance manufactured sand concrete, high performance concrete of single mixed flyash, admixing silica fume and no admixture were compounded, carbonation depth of 3d, 7d, 14d and 28d was recorded by the way of indoor test. The test results show that with the decrease of water-binder ratio, carbonation resistance of high performance manufactured sand concrete increase, and when the concrete compressive strength is over 55Mpa, carbonation resistance is good, and when water-binder ratio is lower than 0.38, the impact of mineral admixtures on the carbonation resistance can be neglected.

scholarly journals Use of condensed silica fume for making high-strength, self-consolidating concrete

2000 ◽  
Vol 27 (4) ◽  
pp. 620-627 ◽  
Author(s):  
A KH Kwan
Keyword(s):  
Silica Fume ◽  
High Performance ◽  
High Performance Concrete ◽  
Concrete Strength ◽  
High Strength ◽  
Self Consolidating Concrete ◽  
Concrete Mix ◽  
Binder Ratio ◽  
Condensed Silica Fume ◽  
Water Binder Ratio

A high concrete strength can be achieved by lowering the water/binder ratio and a high workability by adding a higher dosage of superplasticizer. However, a high-performance concrete with both high strength and high workability cannot be produced by just these means because lowering the water/binder ratio leads to lower workability and there is a limit to the increase in workability that can be attained by adding superplasticizer. To produce a high-strength, high-workability concrete, the concrete strength needs to be increased without lowering the water/binder ratio. This can be done by adding condensed silica fume. In this study, a series of trial mixing aimed at developing high-strength, self-consolidating concrete (mean cube strength >80 MPa and needs no compaction for consolidation) was carried out. Several mixes suitable for making such high-performance concrete have been developed and it was found that the addition of condensed silica fume may, under favourable conditions, increase not only the strength but also the workability of the concrete mix. Based on the trial mix results, charts for the design of high-strength, high-workability concrete mixes made of the studied constituents are presented.Key words: condensed silica fume, high-strength concrete, self-consolidating concrete.

scholarly journals Matrix Optimization of Ultra High Performance Concrete for Improving Strength and Durability

2021 ◽  
Author(s):  
Julio Paredes ◽  
Jaime C. Gálvez ◽  
Alejandro Enfedaque ◽  
Marcos G. Alberti
Keyword(s):  
Silica Fume ◽  
High Performance ◽  
Mercury Intrusion Porosimetry ◽  
High Performance Concrete ◽  
Silica Sand ◽  
Nano Silica ◽  
Ultra High Performance Concrete ◽  
Matrix Optimization ◽  
Binder Ratio ◽  
Strength And Durability

This paper seeks to optimize the mechanical and durability properties of ultra-high performance concrete (UHPC). To meet this objective, concrete specimens were manufactured by using 1,100 kg/m3 of binder, water/binder ratio 0.20, silica sand and last generation of superplasticizer. Silica fume, metakaolin and two types of nano silica were used for improving the performances of the concrete. Additional mixtures included 13mm long OL steel fibers. Compressive strength, electrical resistivity, mercury intrusion porosimetry tests and differential and thermogravimetric thermal analysis were carried out. The binary combination of nano silica and metakaolin, and the ternary combination of nano silica with metakaolin and silica fume, led to the best performances of the UHPC, both mechanical and durable performances.

scholarly journals Fracture Characterization of Ultra-High Performance Concrete Notched Beams under the Influence of Different Material Factors Based on Acoustic Emission Technique

Materials ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4608
Author(s):  
Xianqiang Wang ◽  
Duo Liu ◽  
Yao Zhang ◽  
Yubo Jiao
Keyword(s):  
Acoustic Emission ◽  
Flexural Strength ◽  
High Performance ◽  
High Performance Concrete ◽  
Ultra High Performance Concrete ◽  
Fracture Characterization ◽  
Fracture Characteristics ◽  
Binder Ratio ◽  
Water Binder Ratio

Acoustic emission (AE) technology is widely used in structural health monitoring. Glass sand (GS) made from waste glass is a promising replacement aggregate for quartz sand (QS) in ultra-high performance concrete (UHPC). This paper addresses the effects of different factors including water-binder ratio, length of basalt fiber (BF) and ratio of GS replacing QS on the fluidity and flexural strength of UHPC notched beam under four-point flexural loads. Meanwhile, the fracture characteristics of UHPC notched beam were characterized through acoustic emission (AE) technique. The results show that water-binder ratio and replacement ratio of GS present a positive correlation with work performance of UHPC, while length of BF exhibits a negative one. The flexural strength of UHPC notched beams can be improved by the decrease of the water-binder ratio and fiber length. The effect of water-binder ratio on flexural strength is the most significant, while the addition of GS presents the minimum one. The fracture characteristics of UHPC notched beams could be favorably characterized by AE parameters. Through the analysis and comparison of the evolution of AE parameters, the differences in fracture properties of UHPC notched beams with different flexural strengths can be realized. Through this study, the fluidity and flexural performance of UHPC produced by replacing QS with GS were demonstrated, which is beneficial to the cleaner production of UHPC. Meanwhile, the AE technique presented great potential for fracture characterization of UHPC notched beam, which also provided a promising method for real-time monitoring of cracking in the diagnosis of UHPC structures.

Studies on Influence of Mineral Admixtures on High Performance Concrete Gas Permeability

2011 ◽  
Vol 99-100 ◽  
pp. 762-767 ◽  
Author(s):  
Xian Tang Zhang ◽  
Kang Ning Gao ◽  
Xiao Chen Zhou ◽  
Hong Li Wang
Keyword(s):  
High Performance ◽  
High Performance Concrete ◽  
Gas Permeability ◽  
Reference Value ◽  
High Strength ◽  
Mineral Admixtures ◽  
Concrete Durability ◽  
Close Relationship ◽  
Binder Ratio ◽  
Water Binder Ratio

There is a close relationship between the gas permeability of modern high strength concrete and the concrete durability. Through the Cembureau method, gas permeability coefficients of ordinary concrete and concrete with admixtures under different maintenance periods were tested. We studied the influence of fly ash and slag on high performance concrete gas permeability, and analysed the rules of gas permeability changing with mineral admixtures and the water-binder ratio, and gave the reasonable range of mineral admixtures and the water-binder ratio. The results from the paper may have the certain reference value to practical application.

Influence of Silica Fume on High-Performance Concrete

2014 ◽  
Vol 670-671 ◽  
pp. 437-440 ◽  
Author(s):  
Fan Wang ◽  
Shan Suo Zheng ◽  
Xiao Fei Wang
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Flexural Strength ◽  
Silica Fume ◽  
High Performance ◽  
Mechanical Performance ◽  
High Performance Concrete ◽  
Split Tensile Strength ◽  
Binder Ratio ◽  
Water Binder Ratio

With the improvement of concrete materials and the emergence of new materials, adding silica fume to high-performance concrete (HPC) has been one of the important ways in concrete technology. In this paper, through experimental study on the mechanical performance of HPC with 5%, 10%, 15% and 20% silica fume replacing cement for different water-binder ratio, along with polycarboxylates high performance water-reducing admixture, silica fume has large effects on 28d compressive strength, split tensile strength and flexural strength of the HPC. Meanwhile, due to the different level of water-binder ratio, the relationship between split tensile strength, flexural strength and compressive strength is also obvious linear.

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