Experimental Investigation on the Effect of Fly Ash on Plastic Shrinkage Cracking of Self-Compacting Concrete

2021 ◽  
pp. 85-94
Author(s):  
Anju George ◽  
C. Abin Thomas
Keyword(s):  
Experimental Investigation ◽  
Fly Ash ◽  
Self Compacting Concrete ◽  
Shrinkage Cracking ◽  
Plastic Shrinkage

scholarly journals Prediction of Plastic Shrinkage Cracking of Self-Compacting Concrete

2019 ◽  
Vol 2019 ◽  
pp. 1-7 ◽  
Author(s):  
Parviz Ghoddousi ◽  
Armin Monir Abbasi ◽  
Esmail Shahrokhinasab ◽  
Mohammad Abedin
Keyword(s):  
Shrinkage Strain ◽  
Climatic Conditions ◽  
Water Evaporation ◽  
Test Results ◽  
Self Compacting Concrete ◽  
Shrinkage Cracking ◽  
Plastic Shrinkage ◽  
The Difference ◽  
The Relationship ◽  
Concrete Elements

Concrete exposed to hot climatic conditions is prone to plastic shrinkage after casting within the first few hours due to the water evaporation and restraining conditions of concrete. This cracking is more commonly observed in concrete elements with a large surface area exposed to drying. In this research, plastic shrinkage of 13 self-compacting concrete samples with different cement paste volumes and various coarse to total aggregate ratios was studied. Test specimens of fresh concrete were subjected to a wind tunnel, which simulated hot dry environmental condition immediately after casting. It can be observed from the test results that the relationship between free plastic shrinkage and the difference between bleeding and evaporation is direct and linear. Finally, a model for plastic shrinkage estimation was suggested by considering the effect of free plastic shrinkage strain, restraining factor, and tensile strain capacity of self-compacting concrete.

scholarly journals Modeling Wood and Fly Ash Behaviour as Partial Replacement for Cement on Compressive Strength of Self Compacting Concrete

2021 ◽  
Vol 3 (1) ◽  
Author(s):  
Eluozo S.N. ◽  
Dimkpa K
Keyword(s):  
Growth Rate ◽  
Experimental Investigation ◽  
Compressive Strength ◽  
Fly Ash ◽  
Modeling And Simulation ◽  
Model Validation ◽  
Concrete Strength ◽  
Partial Replacement ◽  
Self Compacting Concrete ◽  
Compressive Strength Of Concrete

Wood and fly ash were observed to have significant qualities that could improved the strength of self compacting concrete, the material were applied to increase the compressive strength of concrete strength, this material could be the demanding material for partial  replacement for cement, the study observed the behaviour of the material from experts that applied these material through experimental investigation, but the study monitored the behaviour of this material by applied modeling and simulation to determine other effect that could influence the behaviour of this materials in compressive strength, this was to determine the  significant effect on the addictive applied as partial replacement for cement, lots of experts has done works on fly ash through experiment concept, but the application of predictive concept has not be carried out, the  adoption of this concept has expressed other parameters that contributed to the efficiency of  wood and fly ash as partial replacement for cement on self compacting concrete. The study adopting modeling and simulation observed 10 and 20% by weight of cement as it is reflected on its performance in the simulation, from the simulation wood recorded 10% as it was observed from the growth rate of this self compacting concrete reflected from the trend, the simulation for model validation were compared with the works of the studies carried out [20]. And both values developed best fits correlation

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