Mechanical Properties Test Research on Mass Concrete Mixed with Different Fly Ash Bulk Volume

The concrete would crack when the temperature stress caused by hardening concrete hydration heat and shrinkage action were over the concrete’ tensile strength. The concrete were added with different amount of fly ash in order to increase concrete’ tensile strength and ultimate tensile strain capacity or consider economic perspective. The mechanics performance tests were carried on mass concrete with different fly ash bulk volume. The test results showed that the fresh fly ash concrete’ workability, hydration heat, compressive strength and durability were obvious superior compared with ordinary concrete.

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Experimental Research on Durability Properties of High Volume Fly Ash Concrete with Polypropylene Fibre

International Journal of Innovative Technology and Exploring Engineering - Special Issue ◽

10.35940/ijitee.f1214.0486s419 ◽

2019 ◽

Vol 8 (6S4) ◽

pp. 1039-1042

Keyword(s):

Fly Ash ◽

High Volume ◽

Polypropylene Fibre ◽

Test Results ◽

Conventional Concrete ◽

Fly Ash Concrete ◽

High Volume Fly Ash ◽

Chloride Resistance ◽

Water Absorption Test ◽

Strength And Durability

This study focuses on the influence of the durable properties of Conventional concrete and High volume fly ash concrete. Fly ash is replaced in various percentages as 0%,40%,50%,55% and 60% by the weight of ordinary Portland cement in addition to that polypropylene fibre of 0.2% is added for improving the strength and Durability of concrete. Water absorption test, chloride resistance test, sulphateresistance test and Rapid Chloride Penetration test (RCPT) were evaluated. The test results show that the addition of high volume fly ash and polypropylene fibre improves the flexural strength and Durability of concrete.Fly Ash replacement of 55% by the weight of cement is considered as the optimum replacement level

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Basic Mechanics Properties Test of Fly Ash Concrete

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.238.138 ◽

2012 ◽

Vol 238 ◽

pp. 138-141

Author(s):

Wei Xie ◽

Hai Juan Zhang ◽

Shu Shan Li

Keyword(s):

Tensile Strength ◽

Compressive Strength ◽

Fly Ash ◽

Ash Content ◽

Early Age ◽

Test Results ◽

Fly Ash Concrete ◽

Influence Mechanism ◽

Normal Reference ◽

Test Study

By the test study of basic mechanics properties of concrete with different fly ash content, the influence of the content of fly ash on the compressive strength, flexural strength, splitting tensile strength and static compressive elastic modulus of concrete are analyzed with the explaining of the influence mechanism of fly ash. The test results show that, comparing with the normal reference concrete, the early age strength of fly ash concrete enhances slowly, while the late strength develops rapidly, even overpasses the strength of normal reference concrete.

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Practical Prediction Models of Tensile Strength and Reinforcement-Concrete Bond Strength of Low-Calcium Fly Ash Geopolymer Concrete

Polymers ◽

10.3390/polym13060875 ◽

2021 ◽

Vol 13 (6) ◽

pp. 875

Author(s):

Chenchen Luan ◽

Qingyuan Wang ◽

Fuhua Yang ◽

Kuanyu Zhang ◽

Nodir Utashev ◽

...

Keyword(s):

Tensile Strength ◽

Fly Ash ◽

Bond Strength ◽

Prediction Models ◽

Splitting Tensile Strength ◽

Geopolymer Concrete ◽

Structural Factors ◽

Test Results ◽

Portland Cement Concrete ◽

Low Calcium

There have been a few attempts to develop prediction models of splitting tensile strength and reinforcement-concrete bond strength of FAGC (low-calcium fly ash geopolymer concrete), however, no model can be used as a design equation. Therefore, this paper aimed to provide practical prediction models. Using 115 test results for splitting tensile strength and 147 test results for bond strength from experiments and previous literature, considering the effect of size and shape on strength and structural factors on bond strength, this paper developed and verified updated prediction models and the 90% prediction intervals by regression analysis. The models can be used as design equations and applied for estimating the cracking behaviors and calculating the design anchorage length of reinforced FAGC beams. The strength models of PCC (Portland cement concrete) overestimate the splitting tensile strength and reinforcement-concrete bond strength of FAGC, so PCC’s models are not recommended as the design equations.

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Performance of Recycled Concrete Aggregate in Self Compacting Concrete

International Journal of Engineering & Technology ◽

10.14419/ijet.v7i3.35.29136 ◽

2018 ◽

Vol 7 (3.35) ◽

pp. 1

Author(s):

T. V. Arul Prakash ◽

Dr. M. Natarajan ◽

Dr. T. Senthil Vadivel ◽

K. Vivek

Keyword(s):

Fly Ash ◽

Coarse Aggregate ◽

Recycled Concrete ◽

Concrete Aggregate ◽

Recycled Concrete Aggregate ◽

Self Compacting Concrete ◽

Fly Ash Concrete ◽

Local Construction ◽

Class F Fly Ash ◽

Strength And Durability

This article presents the influence of the Recycled Concrete Aggregate (RCA) on the mechanical properties of self-compacting fly ash concrete (M30 Grade). The RCA from local construction demolition site were employed as a replacement for natural coarse aggregate (0% - 30%) in self-compacting concrete (SCC). The Viscosity modifying material used in this study was Class F fly ash. The results indicate that recycled concrete aggregate can be replaced by an optimal 25% replacement percentage in the manufacture of SCC without significantly affecting strength and durability.

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Prediction Model for Cementing Efficiency of Fly Ash Concrete by Statistical Analyses

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.250-253.1293 ◽

2011 ◽

Vol 250-253 ◽

pp. 1293-1296 ◽

Cited By ~ 5

Author(s):

Hong Bum Cho ◽

Nam Yong Jee

Keyword(s):

Fly Ash ◽

Prediction Model ◽

Statistical Analyses ◽

Test Results ◽

Construction Sites ◽

K Value ◽

Fly Ash Concrete ◽

Mix Proportion ◽

Wide Range ◽

Binder Ratio

This paper offers the model that can estimate the cementing efficiency of fly ash (k value) based on a mix proportion of concrete containing fly ash (FA). The prediction model was derived using various statistical analyses, based on a wide range of mix proportions and a number of strength test results of ready mixed concretes used in eight construction sites. The k value increases with increasing water-binder ratio. As the FA replacement ratios increase, the k value increases at FA replacement ratios of less than 15%, but decreases at ratios of 15% or more. The k values obtained from the cementing efficiency estimate model range from 0.1 to 2.1.

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Statistical Analysis of the Tensile Strength of Coal Fly Ash Concrete with Fibers Using Central Composite Design

Advances in Materials Science and Engineering ◽

10.1155/2015/486232 ◽

2015 ◽

Vol 2015 ◽

pp. 1-7 ◽

Cited By ~ 3

Author(s):

Marinela Barbuta ◽

Emanuela Marin ◽

Sorin Mihai Cimpeanu ◽

Gigel Paraschiv ◽

Daniel Lepadatu ◽

...

Keyword(s):

Tensile Strength ◽

Fly Ash ◽

Flexural Strength ◽

Central Composite Design ◽

Glass Fiber ◽

Coal Fly Ash ◽

Response Surfaces ◽

Split Tensile Strength ◽

Fly Ash Concrete ◽

Central Composite

The influence of coal fly ash and glass fiber waste on the tensile strength of cement concrete was studied using central composite design. Coal fly ash was used to replace 10% of the cement in the concrete mix. Glass fiber was added to improve the tensile properties of the concrete in different dosages and lengths. In total, 14 mixes were investigated, one only with 10% coal fly ash replacement of cement and the other thirteen were determined by the experimental design. Using analysis of variance, the order of importance of the variables was established for each property (flexural strength and split tensile strength). From the nonlinear response surfaces, it was found that higher values of flexural strength were obtained for fibers longer than 12 mm and at a dosage of 1-2%. For split tensile strength, higher values were obtained for fibers with a length of 19–28 mm and at a dosage of 1–1.5%.

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Research on Some Properties of Fly Ash Concrete with Nano-CaCO3 Middle Slurry

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.405-406.186 ◽

2009 ◽

Vol 405-406 ◽

pp. 186-190 ◽

Cited By ~ 5

Author(s):

Kuang Liang Qian ◽

Tao Meng ◽

Xiao Qian Qian ◽

Shu Lin Zhan

Keyword(s):

Fly Ash ◽

Chloride Ion ◽

Test Results ◽

Hydration Degree ◽

Fly Ash Concrete

Some long-term properties such as anti-carbonation properties, shrinkage, penetrability of chloride ion of fly ash concrete with nano-CaCO3 middle slurry were studied. Test results showed that the properties of anti-carbonation and impenetrability for chloride of fly ash concrete increased by adding nano-CaCO3 middle slurry because the tiny hole was filled by nano-CaCO3 and the density of concrete increased. But at the same time, the shrinkage of fly ash concrete with and without nano-CaCO3 was the same. Results of SEM also implied the hydration degree of fly ash could be increased by nano-CaCO3.

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Experimental Study of Splitting Tensile Strength of Polymer Resin Grout with Fly Ash

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.789-790.38 ◽

2015 ◽

Vol 789-790 ◽

pp. 38-42

Author(s):

Nuria S. Mohammed ◽

Ahmed Baharuddin Abd Rahman ◽

Nur Hafizah A. Khalid ◽

Musaab Ahmed

Keyword(s):

Experimental Study ◽

Tensile Strength ◽

Fly Ash ◽

High Strength ◽

Ash Content ◽

Splitting Tensile Strength ◽

Test Results ◽

River Sand ◽

Polymer Resin ◽

Bonding Material

Polymer resin grout can be used as bonding material for grouted sleeve connections This paper presents the experimental results on the effectiveness of fly ash as micro filler to the splitting tensile strength of polymer grout. In addition, the cement grout that is usually used as bonding material had been tested for comparison. Eleven proportions, of fly ash as the filler and polymer as binder, were tested with the binder to filler volume ratios of 1:1 and 1:1.5. The test results revealed that fly ash can be used as a micro-filler material to partially replace ordinary river sand in polymer resin grout. The splitting tensile strength of the polymer grout increases with the increase of fly ash contents. However, for higher level of fly ash of more than 22%, the splitting tensile strength deteriorated. For binder: filler ratio of 1:1, the optimum fly ash content of 22% gave the maximum splitting strength of 17.62 MPa, which can be considered acceptable for producing grout with high strength bonding material.

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Proposed Model for Stress-strain Behavior of Fly Ash Concrete Under the Freezing and Thawing Cycles

Periodica Polytechnica Civil Engineering ◽

10.3311/ppci.14805 ◽

2020 ◽

Author(s):

Ali Hemmati ◽

Heydar Arab

Keyword(s):

Fly Ash ◽

Numerical Models ◽

Test Results ◽

Freezing And Thawing ◽

Stress Strain ◽

Strain Behavior ◽

Fly Ash Concrete ◽

Proposed Model ◽

The Difference ◽

Freezing And Thawing Cycles

Fly ash is a supplementary cement material using instead of Portland cement in concrete. Using this material concludes to less emission of greenhouse gas and less water demand of concrete. In this paper, an experimental investigation was carried out on compressive stress–strain behavior of three groups of concrete specimens with different water/cement ratios (0.45, 0.5 and 0.55), containing 0, 10, 20, 30 and 40 percent of fly ash (by weight), after subjecting to freezing and thawing cycles. 0, 45, 100 and 150 cycles of freezing and thawing were applied on these specimens according to ASTM C666 and the results presented. Numerical models for the stress–strain behavior of these frozen-thawed concrete were developed and compared with the available experimental data. Results show that the maximum compressive strength of these concrete specimens exposing cycles of freezing and thawing is gained by using about 10 % of fly ash. Moreover, there is a good agreement between the proposed models and test results and the difference is less than 5 %.

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