Development of High Volume Fly Ash Concrete (HVFAC) in Czech Republic

2013 ◽  
Vol 357-360 ◽  
pp. 1012-1018 ◽  
Author(s):  
Lucie Kratochvile ◽  
Hana Sachova ◽  
Jiří Kolísko
Keyword(s):  
Mechanical Properties ◽  
Czech Republic ◽  
Fly Ash ◽  
Physical Properties ◽  
High Volume ◽  
Fly Ash Concrete ◽  
High Volume Fly Ash ◽  
Concrete Production ◽  
Batch Mixing ◽  
Mixing Water

Article discusses the use of fly ash in concrete production. It is focused on the chemical and physical properties of fly ash and in particular the mechanical properties of mortar, where ash was added in amounts of 10% to 70% by weight of cement. Furthermore, the mechanical properties of the samples compared to the same dose of mixing water and samples that have the same consistency of fresh mortar, different batch mixing water.

Mechanical Properties of Class C High Volume Fly Ash Concrete with Lime Water as Mixing Water

2014 ◽  
Vol 660 ◽  
pp. 312-316
Author(s):  
Mochamad Solikin ◽  
Budi Setiawan
Keyword(s):  
Mechanical Properties ◽  
Fly Ash ◽  
Flexural Strength ◽  
Portland Cement ◽  
Ordinary Portland Cement ◽  
High Volume ◽  
Fly Ash Concrete ◽  
Lime Water ◽  
High Volume Fly Ash ◽  
Mixing Water

This paper reports an investigation on mechanical properties of high volume fly ash (HVFA) concrete produced using different types of mixing water i.e. tap water and saturated lime water. The mechanical properties of ordinary Portland cement concrete are also investigated as control tests. The concrete were tested for their compressive strength, flexural strength and splitting tensile strength at the curing ages of 56 days. The results showed that strength development of high volume fly ash concrete up to 56 days is lower than ordinary portal cement. In addition, the flexural strength and splitting strength of concrete are lower than ordinary Portland cement. Moreover, the use of saturated lime water as mixing water reduces the mechanical properties of class C high volume fly ash concrete.

scholarly journals Prediction models for high-volume fly ash concrete practical application: Mechanical properties and experimental database

2021 ◽  
Vol 64 (1) ◽  
pp. 19-43
Author(s):  
Jelena Dragaš ◽  
Snežana Marinković ◽  
Vlastimir Radonjanin
Keyword(s):  
Mechanical Properties ◽  
Fly Ash ◽  
Prediction Models ◽  
High Volume ◽  
Cement Concrete ◽  
Experimental Database ◽  
Fly Ash Concrete ◽  
High Volume Fly Ash ◽  
Concrete Mechanical Properties ◽  
Similar Accuracy

The analysis of available experimental results of high-volume fly ash concrete mechanical properties showed that extensive amount of research had been done so far. However, a comprehensive analysis of basic high-volume fly ash concrete mechanical properties was not found in the literature. Having that in mind, the database of 440 high-volume fly ash concrete and 151 cement concrete mixtures collected from literature was made. The application of European Code EN 1992-1-1 prediction models for cement concrete mechanical properties, as well as existing proposals for high-volume fly ash concrete properties, were statistically evaluated on the results from the database. The analysis showed that the prediction models defined in EN 1992-1-1 for compressive strength, tensile strength and for modulus of elasticity can be used for high-volume fly ash concrete, in the given form or with modifications proposed in literature, with similar accuracy and variation of results as for cement concrete. Own model for fly ash efficiency prediction was developed.

scholarly journals Mechanical Properties of High Volume Fly Ash Concrete Reinforced with Hybrid Fibers

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Rooban Chakravarthy ◽  
Srikanth Venkatesan ◽  
Indubhushan Patnaikuni
Keyword(s):  
Mechanical Properties ◽  
Fly Ash ◽  
Polypropylene Fiber ◽  
Basalt Fiber ◽  
High Volume ◽  
Single Type ◽  
Hybrid Fibers ◽  
Brittle Behavior ◽  
Fly Ash Concrete ◽  
High Volume Fly Ash

Fly ash substitution to cement is a well-recognized approach to reduce CO2emissions. Although fly ash concrete is prone to brittle behavior, researchers have shown that addition of fibers could reduce brittle behavior. Previous research efforts seem to have utlised a single type of fiber or two types of fibers. In this research, three types of fibers, steel, polypropylene, and basalt as 0%, 0.50%, 0.75%, and 1% by volume of concrete, were mixed in varying proportions with concrete specimens substituted with 50% fly ash (class F). All specimens were tested for compressive strength, indirect tensile strength, and flexural strength over a period of 3 to 56 days of curing. Test results showed that significant improvement in mechanical properties could be obtained by a particular hybrid fiber reinforcement combination (1% steel fiber, 0.75% polypropylene fiber, and 0.75% basalt fiber). The strength values were observed to exceed previous research results. Workability of concrete was affected when the fiber combination exceeded 3%. Thus a limiting value for adding fibers and the combination to achieve maximum strengths have been identified in this research.

Study on Mechanical Properties of High Volume Fly Ash Concrete

2013 ◽  
Vol 339 ◽  
pp. 638-641 ◽  
Author(s):  
Ling Mei Zhang
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Fly Ash ◽  
High Performance ◽  
High Performance Concrete ◽  
High Volume ◽  
Mineral Admixture ◽  
Concrete Compressive Strength ◽  
Fly Ash Concrete ◽  
High Volume Fly Ash

With the acceleration of economic development, high-performance concrete applied more widespread due to its own merit. A certain amount of mineral admixture important role in the performance of high-performance concrete. This paper studies the high ash (30% -50%) of fly ash concrete compressive strength, splitting tensile strength, static elastic modulus and other mechanical properties.

scholarly journals Impact of Micro Silca on the mechanical properties of high volume Fly Ash Concrete

2017 ◽  
Vol 80 ◽  
pp. 012009
Author(s):  
R Sripagadeesh ◽  
K Ramakrishnan ◽  
G Pugazhmani ◽  
S Ramasundram ◽  
D Muthu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Fly Ash ◽  
High Volume ◽  
Fly Ash Concrete ◽  
High Volume Fly Ash

Mechanical Properties and Thermal Resistance of High Volume Fly Ash Concrete for Energy Efficiency in Building Construction

2016 ◽  
Vol 678 ◽  
pp. 99-108 ◽  
Author(s):  
B. Balakrishnan ◽  
A.S.M. Abdul Awal
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Fly Ash ◽  
Elevated Temperatures ◽  
Value Added ◽  
High Volume ◽  
Building Construction ◽  
Strength Development ◽  
Fly Ash Concrete ◽  
High Volume Fly Ash

The utilization of waste materials in concrete is one of the best value added solutions to the construction industry. With the aim of sustability development, high volume fly ash (HVFA) were tested in concrete by substituting 40, 50 and 60% of OPC with fly ash. Properties studied in this research includes fresh concrete properties, mechanical properties and the resistance of concrete exposed to high temperature. The test result indicates that HVFA concrete positively influenced the workability; however, the setting times of the concrete were longer. It has been found that the development of strength of high volume fly ash concrete was relatively slower, but ahigher strength development at later ages was observed in concrete containing HVFA. The performance of concrete at elevated temperatures reveals that concrete without any fly ash has better resistance than HVFA concrete at high temperature. The use of high volume fly ash results in an acceptable concrete performance, which grants high potential for energy saving in the building construction.

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