Evaluation of the Effects of Nano Silica on Mechanical Properties of Concrete

GIS Business ◽  
2020 ◽  
Vol 15 (1) ◽  
pp. 166-175
Author(s):  
Dr. Sarvesh PS Rajput
Keyword(s):  
Carbon Dioxide Emissions ◽  
High Performance ◽  
Mechanical Characteristics ◽  
High Performance Concrete ◽  
Sio2 Nanoparticles ◽  
Nano Silica ◽  
Concrete Production ◽  
Fundamental Research ◽  
Functional Features ◽  
The Impact

Concrete is a commonly used building substance. Mostly the cement quantity and quality reflects on the overall concrete production. The use of high cement causes a rise in carbon dioxide emissions, and nano-silica (nSiO2) as a composite alternative has been used to decrease the cements level in composite blends. Currently, the emphasis will be on fundamental research throughout the atomic or nano-levels of the concrete contents. In fact, the experiments continue to enhance the quality and longevity of mortar and have functional features and substantial increases in concrete. It sums up the impact of nano-silica on both the physiological and mechanical characteristics of the concrete. This article also explains the drawbacks and disadvantages of using nano-silica to boost the high-performance concrete (HPC). The use of SiO2 nanoparticles as demonstrated to improve considerably the mechanical characteristics and sustainability of HPC, although by utilizing CNS the flowability of new concrete is reduced.

scholarly journals The Impact of Traffic-Induced Bridge Vibration on Rapid Repairing High-Performance Concrete for Bridge Deck Pavement Repairs

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Wei Wang ◽  
Shuo Liu ◽  
Qizhi Wang ◽  
Wei Yuan ◽  
Mingzhang Chen ◽  
...  
Keyword(s):  
Compressive Strength ◽  
High Performance ◽  
Bridge Deck ◽  
High Performance Concrete ◽  
Reduction Rate ◽  
Harmonic Vibration ◽  
Hydration Reaction ◽  
Self Healing ◽  
The Impact ◽  
Bridge Deck Pavement

Based on forced vibration tests for high-performance concrete (HPC), the influence of bridge vibration induced by traveling vehicle on compressive strength and durability of HPC has been studied. It is concluded that 1 d and 2 d compressive strength of HPC decreased significantly, and the maximum reduction rate is 9.1%, while 28 d compressive strength of HPC had a slight lower with a 3% maximal drop under the action of two simple harmonic vibrations with 2 Hz, 3 mm amplitude, and 4 Hz, 3 mm amplitude. Moreover, the vibration had a slight effect on the compressive strength of HPC when the simple harmonic vibration had 4 Hz and 1 mm amplitude; it is indicated that the amplitude exerts a more prominent influence on the earlier compressive strength with the comparison of the frequency. In addition, the impact of simple harmonic vibration on durability of HPC can be ignored; this shows the self-healing function of concrete resulting from later hydration reaction. Thus, the research achievements mentioned above can contribute to learning the laws by which bridge vibration affects the properties of concrete and provide technical support for the design and construction of the bridge deck pavement maintenance.

scholarly journals The impact of coarse aggregate shape on the behavior of self-compacting high-performance concrete

2018 ◽  
Vol 49 ◽  
pp. 00079
Author(s):  
Krzysztof Ostrowski
Keyword(s):  
High Performance ◽  
Coarse Aggregate ◽  
High Performance Concrete ◽  
Significant Proportion ◽  
Rheological Parameters ◽  
Concrete Technology ◽  
Binder Ratio ◽  
Strength And Stiffness ◽  
Aggregate Shape ◽  
The Impact

Self-Compacting High Performance Concrete (SCHPC) presents a crucial step in the development of concrete technology. The most important features of self-consolidating concrete are flowability, segregation resistance and passing ability. Generally, the rheological properties are modified by effective superplasticisers and water to binder ratio. The aim of this study is to focus on the important aspect of the impact of shape of the coarse aggregate on fresh concrete mixture properties, strength and deformability of SCHPC. Coarse aggregate is a significant proportion of the concrete volume and therefore has a meaningful influence on its quality. By appropriate selection of the shape of the grain aggregate, it is possible to affect the rheological parameters of concrete. The results presented in this study indicated that the shape of the grains of coarse aggregate has an impact on the strength and stiffness of SCHPC. Moreover, the occurrence of irregular grains of coarse aggregate causes lower slump flow and higher plastic viscosity in comparison to concrete mixtures with regular grains only. The research presented in this article is part of the author's wider research devoted to this issue.

scholarly journals Experimental Evaluation of Nano Silica Effects to High Performance Concrete Strength in Early Age

2020 ◽  
Vol 869 ◽  
pp. 032011
Author(s):  
Van-Thuc Ngo ◽  
Tien-Thanh Bui ◽  
Thanh-Quang-Khai Lam ◽  
Thi-Thu-Nga Nguyen ◽  
Van-Hau Nguyen
Keyword(s):  
Experimental Evaluation ◽  
High Performance ◽  
High Performance Concrete ◽  
Concrete Strength ◽  
Early Age ◽  
Nano Silica

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.

scholarly journals Mechanical properties and microstructure of high performance concrete containing stabilized nano-silica

2017 ◽  
Vol 22 (2) ◽  
Author(s):  
Gustavo Braz de Abreu ◽  
Suéllen Mota Marques Costa ◽  
Adriana Guerra Gumieri ◽  
José Márcio Fonseca Calixto ◽  
Fabrício Carlos França ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Performance ◽  
High Performance Concrete ◽  
Nano Silica

Green High Performance Concrete Based on Sustainable Development

2014 ◽  
Vol 584-586 ◽  
pp. 1568-1572
Author(s):  
Ping Zhang ◽  
Ying Cao
Keyword(s):  
Sustainable Development ◽  
High Performance ◽  
High Performance Concrete ◽  
Construction Materials ◽  
Living Environment ◽  
The Sustainable Development ◽  
Green Concrete ◽  
Concrete Production ◽  
Concrete Materials ◽  
The Relationship

Green high performance concrete is concrete materials which can reduce the load of the earth's environment, coordinate development with the ecosystem and create comfortable living environment. The relationship between the construction materials and the sustainable development and the characteristic of green high performance concrete were introduced, the measures of green concrete production was analyzed and the work essential for the development of green high performance concrete was proposed in this paper. The research shows that the development of green high performance concrete is the inevitable way for the sustainable development of concrete.

Development of Mix Proportion for High-Performance Concrete Using Locally Available Ingredients Based on Compressive Strength and Durability

2012 ◽  
Vol 174-177 ◽  
pp. 1067-1071 ◽  
Author(s):  
Jon Bi ◽  
Binsar Hariandja ◽  
Iswandi Imran ◽  
Ivindra Pane
Keyword(s):  
Compressive Strength ◽  
High Performance ◽  
High Performance Concrete ◽  
Research Result ◽  
Environmental Damage ◽  
Mix Proportion ◽  
Concrete Mix ◽  
Strength And Durability ◽  
The Impact ◽  
Local Materials

Keywords: High Performance Concrete, mix proportions, compressive strength , and durability Abstract. The use of concrete materials to date, remain a key ingredient in such construction work on the construction of building, bridges and infrastructure. One indicator is the increased production of readymix concrete which is nearly 16 billion tons in 2010. But the increased used of concrete, apparently bring the impact of environmental damage. This is due to the fact that production of raw materials contributes greatly to CO2 in the air. One effort to reduce such impact is to use of high performance concretes. Mix proportion of High Performance Concrete are strongly determined by the quality and availablity of local materials. The implications of research result from other countries can‘t be directly used. Therefore is need to the research on development of High Performance Concrete mix using locally available materials. In this research the mix proportions for f’c : 60 and 80 MPa are developed using local materials that are commonly used by readymix producers. The high Performance Concrete is developed based on compressive strength and durability. The result is expected to be applied to readymix industry particularly for construction use in Indonesia.

Influence of Hydration Temperature on Durability and Mechanical Property Performance of Prestressed and Precast High-Performance Concrete Beams

2000 ◽  
Vol 1696 (1) ◽  
pp. 131-142 ◽  
Author(s):  
John J. Myers ◽  
Ramon L. Carrasquillo
Keyword(s):  
High Performance ◽  
High Performance Concrete ◽  
Cementitious Materials ◽  
Concrete Technology ◽  
The North ◽  
Texas Department ◽  
Concrete Temperature ◽  
Temperature Development ◽  
The Impact ◽  
Property Performance

Concrete technology has continued to advance throughout the years to meet the demands of designers and innovative structural systems. With the advent of high-performance concrete (HPC), which contains large amounts of cementitious materials, the investigation of the impact of concrete temperature development during hydration on concrete performance is of keen interest. Match-curing technology was used to investigate the influence of concrete temperature development during hydration on the mechanical and material property performance of prestressed and precast HPC beams. These members were fabricated for use in two recently constructed HPC bridges in Texas. The investigation was conducted in conjunction with the design, instrumentation, and construction of the Louetta Road Overpass in Houston, Texas, and the North Concho River US-87 and South Orient Railroad Overpass in San Angelo, Texas. FHWA and the Texas Department of Transportation cosponsored these projects as part of the Strategic Highway Research Program to stimulate the use of HPC and to demonstrate the suitability of HPC in highway structures. The results of the study indicated that for HPCs that contain large amounts of cementitious materials, the concrete temperature during hydration can have a dramatic impact on both the mechanical and the material (durability) performance of the concrete. Temperature recommendations are provided to avoid less than optimal concrete performance on the basis of the member shapes and mix designs investigated in the study.

Sign in / Sign up

Export Citation Format

Share Document