Properties of high performance concrete containing fine-ground ceramics as supplementary cementitious material

2012 ◽  
Vol 34 (1) ◽  
pp. 55-61 ◽  
Author(s):  
Eva Vejmelková ◽  
Martin Keppert ◽  
Pavla Rovnaníková ◽  
Michal Ondráček ◽  
Zbyněk Keršner ◽  
...  
Keyword(s):  
High Performance ◽  
High Performance Concrete ◽  
Cementitious Material ◽  
Supplementary Cementitious Material

scholarly journals Effects of nano silica on carbonation resistance of concrete

2019 ◽  
Vol 275 ◽  
pp. 02001
Author(s):  
Xin Wan ◽  
Chun-fa Su ◽  
Leo Gu Li
Keyword(s):  
High Performance ◽  
High Performance Concrete ◽  
Cementitious Material ◽  
Nano Materials ◽  
Nano Silica ◽  
Carbonation Depth ◽  
Supplementary Cementitious Material ◽  
Carbonation Resistance ◽  
Cost Of Production

In tandem with recent development of nanotechnology and reduction in cost of production, many nano-materials have been tried in concrete. In this study, the effect of nano silica (NS) on the carbonation resistance of concrete was investigated by producing a number of trial concrete mixes with varying water and NS contents for carbonation depth test. The results demonstrated that the addition of NS could significantly reduce the 28-day and 56-day carbonation depths of concrete, indicating that NS may be a promising supplementary cementitious material for producing high-performance concrete.

Influence of Metashale as Cement Replacement on the Hygric Transport Properties of Concrete

2014 ◽  
Vol 1054 ◽  
pp. 188-193 ◽  
Author(s):  
Dana Koňáková ◽  
Veronika Hovorková ◽  
Eva Vejmelková ◽  
Martin Keppert ◽  
Robert Černý
Keyword(s):  
Transport Properties ◽  
High Performance ◽  
High Performance Concrete ◽  
Cementitious Material ◽  
Raw Material ◽  
Replacement Level ◽  
Supplementary Cementitious Material ◽  
Cement Replacement ◽  
Concrete Properties ◽  
Clay Materials

This article is focused on the utilization of metashale as a supplementary cementitious material in concrete. Metashale as well as metakaolin is a product originating in the burning of clay materials, but in metashale production, the raw material is shale (aluminosilicates with granularity up to 0.02 mm). Four mixtures with cement replacement ranging from 0% up to 60% are designed and their properties are examined. Basic physical properties, mechanical strength, as well as hygric transport properties are measured and evaluated, in order to determine the influence of metashale on concrete properties. Experimental results show that for low amounts of cement replacement, metashale admixture leads to the improvement of studied material characteristics. When the material contains 40% of metashale, studied characteristics have almost similar values as the reference material. The worst values of measured properties are obtained for the replacement level of 60%. Nevertheless, all studied materials have appropriate properties to be applicable as high performance concrete.

scholarly journals Abrasion Resistance of Ultra-High-Performance Concrete for Railway Sleepers

2021 ◽  
Author(s):  
Ariful Hasnat ◽  
Nader Ghafoori
Keyword(s):  
Prestressed Concrete ◽  
Abrasion Resistance ◽  
High Performance ◽  
High Performance Concrete ◽  
High Strength ◽  
Positive Influence ◽  
Cementitious Material ◽  
Partial Replacement ◽  
Fine Aggregate ◽  
Ultra High Performance Concrete

AbstractThis study aimed to determine the abrasion resistance of ultra-high-performance concretes (UHPCs) for railway sleepers. Test samples were made with different cementitious material combinations and varying steel fiber contents and shapes, using conventional fine aggregate. A total of 25 UHPCs and two high-strength concretes (HSCs) were selected to evaluate their depth of wear and bulk properties. The results of the coefficient of variation (CV), relative gain in abrasion, and abrasion index of the studied UHPCs were also obtained and discussed. Furthermore, a comparison was made on the resistance to wear of the selected UHPCs with those of the HSCs typically used for prestressed concrete sleepers. The outcomes of this study revealed that UHPCs displayed excellent resistance against abrasion, well above that of HSCs. Amongst the utilized cementitious material combinations, UHPCs made with silica fume as a partial replacement of cement performed best against abrasion, whereas mixtures containing fly ash showed the highest depth of wear. The addition of steel fibers had a more positive influence on the abrasion resistance than it did on compressive strength of the studied UHPCs.

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.

scholarly journals Ground Glass Pozzolan in Conventional, High, and Ultra-High Performance Concrete

2018 ◽  
Vol 149 ◽  
pp. 01005 ◽  
Author(s):  
Arezki Tagnit-Hamou ◽  
Ablam Zidol ◽  
Nancy Soliman ◽  
Joris Deschamps ◽  
Ahmed Omran
Keyword(s):  
High Performance ◽  
High Performance Concrete ◽  
High Strength ◽  
Ground Glass ◽  
Strengthening Effect ◽  
Ultra High Performance Concrete ◽  
Conventional Concrete ◽  
Supplementary Cementitious Material ◽  
Pozzolanic Material ◽  
And Performance

Ground-glass pozzolan (G) obtained by grinding the mixed-waste glass to same fineness of cement can act as a supplementary-cementitious material (SCM), given that it is an amorphous and a pozzolanic material. The G showed promising performances in different concrete types such as conventional concrete (CC), high-performance concrete (HPC), and ultra-high performance concrete (UHPC). The current paper reports on the characteristics and performance of G in these concrete types. The use of G provides several advantages (technological, economical, and environmental). It reduces the production cost of concrete and decrease the carbon footprint of a traditional concrete structures. The rheology of fresh concrete can be improved due to the replacement of cement by non-absorptive glass particles. Strength and rigidity improvements in the concrete containing G are due to the fact that glass particles act as inclusions having a very high strength and elastic modulus that have a strengthening effect on the overall hardened matrix.

Research of High Performance Concrete of C100

2013 ◽  
Vol 838-841 ◽  
pp. 170-174
Author(s):  
Guo Jun Wang
Keyword(s):  
Silicon Content ◽  
High Performance ◽  
High Performance Concrete ◽  
Concrete Strength ◽  
Interface Structure ◽  
Orthogonal Test ◽  
Cementitious Material ◽  
Point Of View ◽  
Aggregate Gradation ◽  
Interface Structures

The effect on concrete strength of various kinds factor was systematically studied by orthogonal test. The amount of cementitious material, slag content, silicon content, water cement ratio, aggregate gradation and other factors was consider. By adjusting the parameters of the experiment, the C100 concrete was preparation successfully, which has high stregth and pumping perfomance. The interface structure of the C100 concrete was analyzed by scanning electron microscope (SEM) and found that C100 has a better interface structures. The concrete is a system and his strength depends on the strength of the suitability of various materials, which is a new point of view was put forward.

UHPC Footbridge over the Opatovický Canal

2016 ◽  
Vol 249 ◽  
pp. 320-324
Author(s):  
Jan Tichý ◽  
David Čítek ◽  
Jiří Kolísko ◽  
Jan Komanec ◽  
Bohuslav Slánský ◽  
...  
Keyword(s):  
Material Properties ◽  
High Performance ◽  
High Performance Concrete ◽  
Construction Material ◽  
Cementitious Material ◽  
Ultra High Performance Concrete ◽  
High Durability ◽  
Design Production ◽  
New Type ◽  
Reliable Design

Article deals with design of footbridge made from ultra high performance concrete (UHPC). UHPC is relatively new type of cementitious material with high compressive strength and high durability. For reliable design of construction from this material an extensive experimental research and verification of material properties are needed. Skanska and Pontex company with cooperation with Klokner institute developed matrix of UHPC used for footbridge construction. Material properties were verified during whole developing and producing process. Footbridge was casted in precast plant Skanska – Steti in December 2014. It was installed over Opatovický canal in October 2015. Contribution describes design, production and installation of footbridge. Material properties of used UHPC are also included.

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