Application of Nanomaterials for Sustainable Concrete

2020 ◽  
Vol 838 ◽  
pp. 88-93
Author(s):  
Kristýna Hrabová
Keyword(s):  
Mechanical Properties ◽  
Construction Industry ◽  
Carbon Dioxide Emissions ◽  
High Performance ◽  
Dose Dependence ◽  
Green Concrete ◽  
Sustainable Concrete ◽  
Environmental Destruction ◽  
Concrete Production ◽  
New Generation

Green concrete is defined as a concrete which uses waste material as at least one of its components, or its production process does not lead to environmental destruction, or it has high performance and life cycle sustainability. Currently, cement and concrete production is at all-time high resulting in significant carbon dioxide emissions. Eight percent of the world's total CO2 emissions come from manufacturing cement. Nanomaterial concrete is new generation concrete formed of materials of the grain size of nanoscale. In the construction industry, nanomaterials has potentials, especially the functional characteristics such as increased tensile strength. The paper shows the dose dependence carbon nanotubes for the physico-mechanical properties of cement mixes.

scholarly journals Partial Replacement of Cement with Combination of Alccofine and Marble Dust for Development of Sustainable Concrete

2019 ◽  
Vol 8 (4) ◽  
pp. 1190-1194
Keyword(s):  
Carbon Dioxide Emissions ◽  
High Performance ◽  
Environmental Problem ◽  
High Performance Concrete ◽  
Economic Benefits ◽  
Partial Replacement ◽  
Conventional Concrete ◽  
Sustainable Concrete ◽  
Marble Dust ◽  
New Generation

Concrete is second most consumed material in the world after water. Cement being the important material of concrete needs to be manufactured in large amount. Production of cement involves large amount of carbon dioxide emissions into the atmosphere, a major contributor for greenhouse effect and global warming. Also demand of high performance concrete (HPC) for infrastructural industry is growing. Thus, it becomes necessary to discover a partial replacement of material for cement in concrete which is environmental friendly and strength gaining which solves both issues. Leaving the waste materials to the environment directly can also cause environmental problem. Marble Dust Powder (MDP) is a developing composite material that will allow the concrete industry to optimize materiel use, generate economic benefits. Alccofine is a new generation ultra fine supplementary cementetious material as a partial replacement of cement. It also tends to gain high performance of concrete. Usage of alccofine and MDP in a combination as supplementary cementetious material (SCM) by partially replacing cement in concrete can be a leading step towards sustainable development of concrete industry. Comparing and examining the physical properties of this new modified concrete with conventional concrete is the motivation of this study.

Development of Green High Performance Concrete

2013 ◽  
Vol 634-638 ◽  
pp. 2672-2675
Author(s):  
Zhen Rong Lin ◽  
Tao Zhang ◽  
Yun Yun Xu
Keyword(s):  
Mechanical Properties ◽  
High Strength Concrete ◽  
High Performance ◽  
Building Materials ◽  
High Performance Concrete ◽  
High Strength ◽  
Current Development ◽  
Green Concrete ◽  
The Past ◽  
Concrete Production

As the world's largest building materials production, the mechanical properties of concrete prominent and construction is simple, inexpensive features. Concrete production and construction sectors also exists a very serious problem of environmental pollution, people have to consider how to enhance the environmental protection of concrete, namely, the production and use of "green concrete". Since the past one-sided pursuit of high strength concrete, while ignoring the the durability issues brought a series of questions, allowing people to put forward the concept of a high-performance concrete. The paper by exploring the current development of high-performance green concrete, summary of the proposed method to achieve green high performance concrete.

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.

Review Paper: Strength Performance of Eggshell as a Cement Replacement in Concrete

2021 ◽  
Vol 879 ◽  
pp. 22-33
Author(s):  
Adnan Zaidatul Syahida ◽  
Ariffin Nur Farhayu ◽  
Sharifah Maszura Syed Mohsin ◽  
Abdul Shukor Lim Nor Hasanah
Keyword(s):  
Mechanical Properties ◽  
Construction Industry ◽  
Carbon Dioxide Emissions ◽  
Egg Production ◽  
Paper Strength ◽  
Normal Concrete ◽  
Cement Production ◽  
Strength Performance ◽  
Cement Replacement ◽  
The Past

The numbers of Malaysian construction industry had been increasing in several years with the large construction building and infrastructures projects had been constructed. Therefore, these developments led to an increase of cement production. The production of cement will cause wider environmental implication such are air pollution, water pollution and soil pollution which are very dangerous for human health. This is due to the manufacturing of cement that release dust, toxic and carbon dioxide emissions, which is a significant contributor of greenhouse gases. To overcome this problem, several researches had been conducted for the past few decade to find a new waste material that have same mechanical properties which can replace cement content in construction. One of the most promising materials that shows great potential is eggshell as a cement replacement. It is reported that the global egg production will increase to about 90 million tons by 2030, therefore the waste of eggshell will be increased too. This paper study the mechanical properties of eggshell as a cement replacement in concrete. Several papers had been reviewed and the results are presented in order to shows the performance of eggshell in concrete. The result shows that the concrete with less than 15% replacement of eggshell produced higher compressive and tensile strength compared to normal concrete. Moreover, the flexural strength of concrete containing eggshell up to 20% replacement shows comparable results with normal concrete. From the results, by replacing cement with eggshell up to 15% show a good performance as well as can reduce the use of cement and reduce the eggshell wasted in landfill.

Ultra-high performance concrete – properties and technology

2013 ◽  
Vol 61 (1) ◽  
pp. 183-193 ◽  
Author(s):  
T. Zdeb
Keyword(s):  
Mechanical Properties ◽  
Hydrothermal Treatment ◽  
High Performance ◽  
High Performance Concrete ◽  
Qualitative Evaluation ◽  
High Strength ◽  
Ultra High Performance Concrete ◽  
Characteristic Features ◽  
Reactive Powder ◽  
New Generation

Abstract The paper deals with information concerning properties and technology of a new generation cementitious composite i.e. Ultra-High Performance Concrete. High performance here means both high strength and high durability under the influence of environmental factors. This group of composites is mainly represented by Reactive Powder Concretes (RPC), which show both outstanding durability and mechanical properties. Characteristic features of RPC are mainly due to the very low water-cement ratio, which involves application of superplasticizer, significant reduction of aggregate grains size as well as hydrothermal treatment. In the first part of the paper selected properties of RPC are compared to ordinary concrete and to other groups of new generation concrete. Moreover, fundamental technological factors influencing properties of RPC are described as well. The second part deals with the RPC developed at Cracow University of Technology. The presented test results are mainly focused on the influence of steel fibres content on mechanical properties of reactive powder concrete and hydrothermal treatment on composites microstructure. The quantitative and qualitative evaluation of this relationship expand the knowledge of the UHPC technology. Finally, the third part presents the most significant and newest structures which have been erected with the use of RPC

scholarly journals Effect of Mechanical Properties On Light Weight Sustainable Concrete With The Use of Waste Coconut Shell As Replacement For Coarse Aggregate

2021 ◽  
Author(s):  
Karthiga Shenbagam Natarajan ◽  
Dhivya Ramalingasekar ◽  
Sushmitha Palanisamy ◽  
Mohanraj Ashokan
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Construction Industry ◽  
Coarse Aggregate ◽  
Research Work ◽  
Coconut Shell ◽  
Natural Material ◽  
Light Weight ◽  
Sustainable Concrete ◽  
Sisal Fibers

Abstract Concrete is one of the most important material that is used in the construction industry all around the world. A larger part of the capacity in concrete is generally employed by the coarse aggregate. Due to the tremendous use of coarse aggregate in the construction industry the material is getting degraded. In order to preserve the natural material, we are in search of an alternate material that can be used in concrete instead of the original one. So in this research work a try has been attempted to study the mechanical behaviour of light weight concrete when we use coarse aggregate as waste coconut shell inside concrete. To improve the strength of concrete we also use the sisal fibers in various proportions ranging between 1% to 5% in accordance to the binder weight. After the mechanical properties tests such as the compression test, spilt tensile strength, flexural test, modulus of elasticity test, impact resistant test were conducted finally it was concluded that there was increment in the compression strength up to 5%, tensile strength was increased to 17% elastic modulus to 7% when the fiber content used was 3%. Thus with the use of these waste materials it was found that the concrete's strength gets increased and it leads to the formation of sustainable concrete thus reducing the pollution in the environment.

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.

Research on Mechanical Properties of Nano-Concrete

2012 ◽  
Vol 628 ◽  
pp. 50-54 ◽  
Author(s):  
Yi Zhi Yan ◽  
Zhi Min Su ◽  
Liang Wu
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
High Performance ◽  
High Performance Concrete ◽  
Fiber Reinforced Concrete ◽  
Nano Materials ◽  
Green Concrete ◽  
Nano Sio2 ◽  
Strength And Durability

This paper describes some of the characteristics of nano-materials are discussed nano SiO2, silica fume and nano-scale carbon-fiber reinforced concrete to improve strength and durability of the role of nano-SiO2, silica and carbon nano-fibers can be prepared as an admixture of high performance concrete, nano materials can also be used as a preparation mixed with Division of concrete with special features, such as metal oxides can be prepared by adding nano smart concrete and green concrete, metal powder can be prepared by adding nano electromagnetic shielding concrete.

scholarly journals Special Issue on Green Concrete for a Better Sustainable Environment

2020 ◽  
Vol 10 (7) ◽  
pp. 2572
Author(s):  
Waiching Tang
Keyword(s):  
Life Cycle ◽  
Production Process ◽  
High Performance ◽  
Waste Material ◽  
Special Issue ◽  
Green Concrete ◽  
Environmental Destruction ◽  
Sustainable Environment

Green concrete is defined as concrete that uses waste material as at least one of its components, or has a production process that does not lead to environmental destruction, or has a high performance and life cycle sustainability [...]

scholarly journals Microstructure and Mechanical Properties of Inconel 740H after Long-Term Service

Materials ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2130 ◽  
Author(s):  
Adam Zieliński ◽  
Marek Sroka ◽  
Tomasz Dudziak
Keyword(s):  
Mechanical Properties ◽  
High Performance ◽  
Elevated Temperatures ◽  
Precipitation Process ◽  
Performance Pressure ◽  
Microstructure And Mechanical Properties ◽  
Transmission Electron ◽  
Steam Boilers ◽  
Diagnostic Work ◽  
New Generation

Inconel 740H is a nickel-based alloy for pressure components of ultra-supercritical boilers. Its chemical composition and strengthened matrix, as well as corrosion resistance, provide the highest creep resistance among the materials recommended for use in high-performance pressure components of power units. This paper investigates the changes in the microstructure and mechanical properties after ageing at 700 and 750 °C for 1000, 10,000, 20,000, and 30,000 h. Observation of the microstructure was performed using scanning and transmission electron microscopy. The identification of existing precipitates was conducted by X-ray phase analysis. The effects of time and ageing at elevated temperatures on the mechanical properties and precipitation process in the test alloy are discussed. The presented results are part of the material characteristics of the new-generation alloys to be used in the design of pressure equipment for steam boilers, as well as in diagnostic work during operation.

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