Mix design of high performance concrete with different mineral additions

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Tarek Hadji ◽  
Salim Guettala ◽  
Michèle Quéneudec
Keyword(s):  
Mathematical Models ◽  
High Performance ◽  
Mechanical Characteristics ◽  
High Performance Concrete ◽  
Mixture Design ◽  
Content Type ◽  
Complementary Effect ◽  
Statistical Variation ◽  
Natural Pozzolana ◽  
Mineral Additions

Purpose The purpose of this paper is to present the modeling of statistical variation of experimental data using the design of experiments method to optimize the formulation of a high performance concrete (HPC) using materials that are locally available in Algeria. For this, two mineral additions (natural pozzolana and limestone filler [LF]) were used. Both additions are added by substitution of cement up to 25%. To better appreciate the effect of replacing a part of cement by natural pozzolana and LF and to optimize their combined effect on the characteristics of HPC, an effective analytical method is therefore needed to reach the required objective. Design/methodology/approach The experimental part of the study consisted of substituting a portion of cement by various proportions of these additions to assess their effects on the physico-mechanical characteristics of HPC. A mixture design with three factors and five levels was carried out. The JMP7 software was used to provide mathematical models for the statistical variation of measured values and to perform a statistical analysis. These models made it possible to show the contribution of the three factors and their interactions in the variation of the response. Findings The mixture design approach made it possible to visualize the influence of LF and pozzolanic filler (PF) on the physico-mechanical characteristics of HPC, the developed models present good correlation coefficients (R2 = 0.82) for all studied responses. The obtained results indicated that it is quite possible to substitute a part of cement with LF and PF in the formulation of a HPC. Thanks to the complementary effect between the two additions, the workability could be improved and the strengths drop could be avoided in the short, medium and long term. The optimization of mixture design factors based on the mathematical models was carried out to select the appropriate factors combinations; a good agreement between the experimental results and the predicted results was obtained. Originality/value The coefficient of PF in Cs28 model is closer to that of LF than in Cs7 model, thanks to the complementary effect between LF and PF at the age of 28 days. It was found that the optimal HPC14 concrete (10%LF–5%PF) provides the best compromise between the three responses. It is also worth noting that the use of these two local materials can reduce the manufacturing costs of HPC and reduce carbon dioxide emissions into the atmosphere. This can be an important economic and environmental alternative.

Formulation and study of metal fiber-reinforced reactive powder concrete

2018 ◽  
Vol 15 (4) ◽  
pp. 531-539
Author(s):  
Mounira Chadli ◽  
Mellas Mekki ◽  
Bouzidi Mezghiche
Keyword(s):  
High Performance ◽  
High Performance Concrete ◽  
Volume Fraction ◽  
Particle Diameter ◽  
Fiber Reinforced ◽  
Metal Fiber ◽  
Fiber Volume ◽  
Content Type ◽  
Mineral Additions ◽  
Reactive Powder

PurposeReactive powder concretes (RPCs) are new concretes characterized by a particle diameter not exceeding 600 µm and very high compressive and tensile strengths. This paper aims to the development and study of the physico-mechanical, elastic properties and durability of an ultra-high performance concrete from materials existing on the Algerian market.Design/methodology/approachThree mineral additions such as granulated slag, quartz powder and silica fume are incorporated into the cement with 15, 23 and 25 per cent, respectively, in addition to use two different values of steel fiber volume fraction (2 and 2.5 per cent). The results show that the incorporation of 2.5 per cent metal fibers in the formulation of the RPC gives a high compressive strengths of 143.5 MPa at 60 days. The relationship between the relative value and the longitudinal elasto-instantaneous deformations of the RPC to a linear characteristic throughout the relative stress ranges. Also, the modulus of elasticity developed for a fiber-reinforced reactive concrete is greater than that of the unbound fiber.FindingsResults from the current study concluded that the presence of the mineral additions improves the durability of the concretes compared with that not adjuvanted by mineral additions.Originality/valueIt can be possible to manufacture fiber-reinforced reactive powder concretes (RPCFs) with compressive strength exceeding 140 MPa, with an adequate plasticity, despite the simplicity of means and materials and the incorporation of different percentage of metal fiber on the mechanical strength of concretes and its influence on behavior with respect to aggressive environment were achieved.

Hygric Properties of HPC with Natural Pozzolana

2016 ◽  
Vol 677 ◽  
pp. 93-97 ◽  
Author(s):  
Jaroslava Koťátková ◽  
Monika Čáchová ◽  
Dana Koňáková ◽  
Eva Vejmelková
Keyword(s):  
Water Vapour ◽  
High Performance ◽  
High Performance Concrete ◽  
Diffusion Resistance ◽  
Supplementary Cementitious Material ◽  
Water Vapour Transport ◽  
Water Vapour Diffusion ◽  
Natural Pozzolana ◽  
Vapour Diffusion ◽  
Liquid Water Transport

The water vapour transport and the liquid water transport of high performance concrete (HPC) with the content of natural pozzolana are the described in this paper. Studied properties are presented by means of water vapour diffusion coefficient, water vapour diffusion resistance factor and absorption coefficient respectively. The natural pozzolana (NP), namely natural zeolite, is used as supplementary cementitious material which affects the durability properties of the end product. The obtained results revealed the effectiveness of NP in the terms of both studied properties when used in small amounts, i.e. at about 20% of cement weight. On the other hand substitutions higher than 40% result in worsening of the resistance of the concrete to water and water vapour ingress and its movement trough the material.

The ability of high performance concrete to resist high temperature

2017 ◽  
Vol 8 (4) ◽  
pp. 392-401 ◽  
Author(s):  
Hassan A.M. Mhamoud ◽  
Jia Yanmin
Keyword(s):  
Compressive Strength ◽  
Flexural Strength ◽  
Mass Loss ◽  
High Performance ◽  
Elevated Temperatures ◽  
High Performance Concrete ◽  
Sharp Decrease ◽  
Test Results ◽  
Content Type ◽  
Chinese Standard

Purpose This study aims to focus on the resistance to elevated temperatures of up to 700ºC of high-performance concrete (HPC) compared to ordinary Portland concrete (OPC) with regards to mass loss and residual compressive and flexural strength. Design/methodology/approach Two mixtures were developed to test. The first mixture, OPC, was used as the control, and the second mixture was HPC. After 28 days under water (per Chinese standard), the samples were tested for compressive strength and residual strength. Findings The test results showed that at elevated temperatures of up to 500ºC, each mixture experienced mass loss. Below this temperature, the strength and the mass loss did not differ greatly. Originality/value When adding a 10 per cent silica fume, 25 per cent fly, 25 per cent slag to HPC, the compressive strength increased by 17 per cent and enhanced the residual compressive strength. A sharp decrease was observed in the residual flexural strength of HPC when compared to OPC after exposure to temperatures of 700ºC.

Impact of Steel Fibers on Workability and Properties of UHPC

2016 ◽  
Vol 249 ◽  
pp. 57-61 ◽  
Author(s):  
Milan Rydval ◽  
Tomáš Bittner ◽  
Jiří Kolísko ◽  
Šárka Nenadálová
Keyword(s):  
Mechanical Properties ◽  
High Performance ◽  
High Performance Concrete ◽  
Volume Fraction ◽  
Fresh Concrete ◽  
Mixture Design ◽  
Steel Fibers ◽  
Hardened Concrete ◽  
Hardened Cement ◽  
The Impact

This paper is focused on properties of fresh and hardened cement-based composite Ultra-High Performance Concrete with regard to different volume fraction of short brass coated steel fibers BASF MASTERFIBER® 482. Workability of fresh concrete and basic mechanical properties (tensile strength in bending, compressive strength) of hardened UHPC were found out. The workability of fresh concrete was measured by small mortar Haegermann cone. Percentage differences at cost were obtained at hardened concrete, too. The aim of the first experimental part of the research was the impact of volume fraction of steel fibers according to workability of fresh concrete and also according to mechanical properties of hardened UHPC with the same volume fraction of each component of the mixture, only the volume fraction of the steel fibers was different at each mixture. The mixture design of UHPC was changed to maintaining the workability of fresh concrete at the second part of the research. The workability at mixture with dosage of steel fibers of 300 kg/m3 measured by Haegermann cone was around 300 mm. In the framework of grant project GAČR 15-05791S the basic mechanical properties of hardened fine-grained cementitious composite material UHPC at small beams size of 160/40/40 mm and beams size 300/70/70 mm were determined. The aim of the research project was not only the determination of basic mechanical properties for each mixture design but also workability assessment and costs linked with higher amount of the volume fracture of steel fibers.

Study on the Numerical Modeling of the SRHPC Frame

2010 ◽  
Vol 163-167 ◽  
pp. 1561-1564
Author(s):  
Pi Ji Hou ◽  
Shan Suo Zheng ◽  
Lei Li
Keyword(s):  
Finite Element ◽  
Numerical Modeling ◽  
High Performance ◽  
Applied Load ◽  
Mechanical Characteristics ◽  
High Performance Concrete ◽  
Frame Structure ◽  
Test Results ◽  
Modeling Methodology

The modeling methodology is investigated for steel reinforced high performance concrete (SRHPC) in this paper. According to the mechanical characteristics of the SRHPC members, the structural section can be divided into different zones, and the element suitable for each zone is determined. Some discussion is made for how to control finite element gridding as well as applied load. Hysteretic loops of the computation results and test results agree well with each other, indicating the accuracy and applicability of the methodology. This research may be helpful for the nonlinear finite analysis of the SRHPC frame structure.

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

92-MPa Air-Entrained High-Performance Concrete Using Tennessee Materials

2000 ◽  
Vol 1698 (1) ◽  
pp. 24-29 ◽  
Author(s):  
L. K. Crouch ◽  
Heather J. Sauter ◽  
Jacob A. Williams
Keyword(s):  
High Performance ◽  
High Performance Concrete ◽  
Maximum Size ◽  
Mixture Design ◽  
Unit Weight ◽  
Fine Aggregate ◽  
Freezing And Thawing ◽  
Aggregate Gradation ◽  
Static Modulus ◽  
Static Modulus Of Elasticity

An air-entrained high-performance concrete (HPC) mixture design for prestressed bridge beams was developed in an attempt to interest the Tennessee Department of Transportation. The mixture contained locally available, 19-mm maximum-size limestone as the coarse aggregate and a manufactured limestone fine aggregate. A dense, combined aggregate gradation was used to lower water demand and thus enhance durability. Type II portland cement, microsilica, and Class C fly ash were used as binder materials. The resulting w/(c + p) was 0.22. Twelve 0.028-m3 batches of the HPC were mixed for the study. The mixture design produced an average air content of 4.1 percent and an average slump of 72 mm. Although it contained 4.1 percent air, the mixture remained very dense, with an average unit weight of 2422 kg/m3. Average compressive strengths of 72.6, 63.3, 84.8, and 92.9 MPa were achieved at simulated release at 7, 28, and 56 days, respectively. Measured static modulus of elasticity at 28 days agreed with ACI 363R-92 equations within 2 percent. Further, after 600 freezing and thawing cycles, the average durability factor of two prismatic specimens was 100, and visible damage was minimal.

Mechanical Properties of High Performance Concrete Subjected to High Temperature as a Function of Fly-Ash and Fiber Addition

2014 ◽  
Vol 912-914 ◽  
pp. 227-230 ◽  
Author(s):  
Seung Jo Lee
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Weight Reduction ◽  
High Performance ◽  
Mechanical Characteristics ◽  
High Performance Concrete ◽  
Reduction Ratio ◽  
Crack Control ◽  
Residual Compressive Strength ◽  
Heating Up

The purpose of this study is to have a better understanding of the mechanical characteristics of high performance concrete which is produced by mixing reinforcing fiber controlled by high temperatures with fly ash. After heating up the concrete, its appearance, demolition mode, residual compressive strength, weight reduction ratio and other mechanical characteristics were measured. To improve the mechanical characteristics of concrete, it was mixed with nylon, polypropylene, steel fiber and fly ash. The specimen was exposed to 100 ~ 800°C and its crack control, spalling prevention and other mechanical characteristics were reviewed. When the high performance concrete was exposed to 600°C or higher, its residual compressive strength dropped but its weight reduction ratio was significantly higher than it was heated before.

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
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