Thermal Effect Of Marble And Tile Fillers On Self-compacting Concrete Behaviour In The Fresh State And At Early Age
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Thermal Effect Of Marble And Tile Fillers On Self-compacting Concrete Behavior In The Fresh State And At Early Age. it shows the cause of crack with marbal and ssc concrete.
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Thermal Effect Of Marble And Tile Fillers On Self-compacting Concrete Behaviour In The Fresh State And At Early Age
- 1. Thermal Effect Of Marble And Tile Fillers On Self-compacting Concrete Behaviour In The Fresh State And At Early Age BY : Tejaskriya Pradhan
- 2. Uses of Self-Compacting Concrete • Previously In Big Constructions • Now A Days in Buildings also
- 3. Problems in SCC Amplitude Of Plastic Shrinkage SCC >>> OVC SO FOR CRACKS SSC > OVC
- 4. Problems Researches Were Undertaken For To Reduce Drying Shrinkage
- 5. Valorising The Industrial Wastes W1 •Waste of marble W2 •Waste of marble tile W3 •Waste of gravel tile
- 6. EXPERIMENTS FIRST • Effect Of These Industrial Wastes On The Setting Of Cement Paste SECOND • Effects On The Phase Of Hydration ON SSC FINAL • The Plastic Shrinkage And Cracking In The Fresh State Of The SCCWs
- 8. Requirements For Experiment Portland cement SIKA VISCOCRETE TEMPO 12 limestone filler Industrial Waste Aggregates
- 9. Mixture Proportions SSC CONCRE TE (C) W1 W2 W3 LIME STONE FILLER (R) W1 W2 W3 CW1 CW2 CW3 CR SSCR C SSC W1 SSC W2 SSC W3
- 13. Fresh concrete Green concrete Concrete at very early age Concrete at early age Hardened concrete End of cement setting Plastic shrinkage Chemical shrinkage Autogenous shrinkage Thermal shrinkage 2hr 24 hr 2-3 Days Time
- 15. OBSERVATIONS
- 16. OBSERVATIONS
- 17. OBSERVATIONS
- 18. OBSERVATIONS
- 19. CONCLUSION • The marble and tiles wastes acted as A setting accelerator • A positive effect on the fresh state of the concrete by reducing plastic shrinkage, by decreasing the setting period of cement paste combined with these industrial wastes from 20% to 27% relative to the paste (C+R). • Reduce the release of heat in the exothermic hydration reactions of cement in self-compacting concrete up to 13% and limit their cracking due to different shrinkages.
- 20. • Have a positive effect on plastic shrinkage; they reduce the cracking caused by this shrinkage compared to SCCR by 35–58% for a ventilated and hot environment (40 °C) • The cracking due to plastic shrinkage depends on physicochemical properties of fillers, such as grain size, roughness of the surface and grain shape of the particles and their chemical composition. CONCLUSION
Editor's Notes
- , the setting of the paste of the mixture (C+W3) is the fastest, whereas those of (C) and (C+R) are the slowest. According to the results obtained, it can be said that the fillers of the three industrial wastes (W1, W2 and W3) accelerate the setting of the paste especially for the waste W3 which comes from the gravel tile. Furthermore, the obtained results in Fig. 2 show that these industrial wastes acts as a setting accelerator and seem to be dependent on the their chemical composition.
- the setting period of the pastes this represents the difference between initial of setting time (IST) and the final of setting tim (FST), of the normalized limestone filler (C+R) and of the these industria wastes (C+W1, C+W2 and C+W3), decrease respectively Hence, the particle sizes of these fillers have an effect on the settin period: the more the filler is fine; the more the setting period increases.
- the maximum temperatures of the hydration reaction for the various concretes are reached after 40 h. For the SCCWs, they have lower hydration temperatures than the SCCR in a range of 6–13%. Similarly, in comparison with the OVC, there is a reduction of the hydration temperature of 14% for the SCCW2. These industrial wastes have a positive effect on the exothermic hydration reactions of the cement for the SCCWs; they reduce the maximum temperature of cement hydration and ensure slow cooling down to 15 days. The effect of the marble and tile wastes is to avoid the cracking of SCCWs due to thermal shrinkage during their rapid cooling
- plastic shrinkage is a contraction of the concrete and which corresponds to the evaporation of the mix water in the plastic phase (green concrete) or the cement setting period presented in Fig. 5 [25]. For each type of concrete, the mixture is poured into a mould and exposed to changes of two factors that promote plastic shrinkage (heat and wind) and measurements will be taken of the evolution over time of the total length of the cracks that develop on the sample surface.
- With Whith out ventilation Labotary(25) Hot env (40)
- The marble and tiles wastes acted as a setting accelerator with efficiency depending on their chemical composition in particular the amount of alumina.
- The marble and tiles wastes acted as a setting accelerator with efficiency depending on their chemical composition in particular the amount of alumina.