Experimental Study on the Optimization of Crushed Limestone

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Experimental Study on the Optimization of Crushed Limestone Sand as Partial Replacement of Sea

Experimental Study on the Optimization of Crushed Limestone Sand as Partial Replacement of Sea Sand in Concrete Xiaoguang CHEN, Zeger SIERENS, Brecht VANDEVYVERE, Jiabin LI Department of Civil Engineering, KU Leuven, xiaoguang. chen@kuleuven. be

Presentation overview § § § 2 1. Research background 2. Research objective 3. Literature

Presentation overview § § § 2 1. Research background 2. Research objective 3. Literature review 4. Experimental program 5. Conclusion 01/07/2019 download full paper at www. cesb. cz/19/2424 Faculty of Engineering Technology Research Group Recy. Con

1. Research background Consulting project By-product of quarry Sea sand 0/2. 5 mm (SS)

1. Research background Consulting project By-product of quarry Sea sand 0/2. 5 mm (SS) 3 01/07/2019 Crushed limestone sand 0/4 mm (CLS) download full paper at www. cesb. cz/19/2424 Limestone 4/25 mm Segregation & Bleeding problem Faculty of Engineering Technology Research Group Recy. Con

1. Research background Target concrete: C 25/30, S 4 Table 1 Industrial concrete mixture

1. Research background Target concrete: C 25/30, S 4 Table 1 Industrial concrete mixture Materials Type Dosage [kg/m 3] Cement Water Coarse aggregate Fine aggregate CEM III/A 42. 5 Holcim Tap water Limestone 4/25 mm Crushed limestone sand 0/4 mm (CLS) Sea sand 0/2. 5 mm (SS) Master. Pozzolith 390 N con 40% Master. Glenium SKY 576 con 15% 295 168 1012 433 435 1. 0 3. 6 Water reducer (WR) Superplasticizer (SP) w/c = 0. 57, sand ratio = 46%, replacement ratio = 50%, WR = 0. 34%, SP = 1. 22% 4 01/07/2019 download full paper at www. cesb. cz/19/2424 Faculty of Engineering Technology Research Group Recy. Con

Presentation overview § § § 5 1. Research background 2. Research objective 3. Literature

Presentation overview § § § 5 1. Research background 2. Research objective 3. Literature review 4. Experimental program 5. Conclusion 01/07/2019 download full paper at www. cesb. cz/19/2424 Faculty of Engineering Technology Research Group Recy. Con

2. Research objective § What is the effect of crushed limestone sand (CLS) on

2. Research objective § What is the effect of crushed limestone sand (CLS) on concrete? Literature review Experimental validation § What is the reasonable range of replacement ratio of sea sand (SS)? Experimental study § Develop a qualified concrete mixture Use the crushed limestone sand (CLS) as much as possible 6 01/07/2019 download full paper at www. cesb. cz/19/2424 Faculty of Engineering Technology Research Group Recy. Con

Presentation overview § § § 7 1. Research background 2. Research objective 3. Literature

Presentation overview § § § 7 1. Research background 2. Research objective 3. Literature review 4. Experimental program 5. Conclusion 01/07/2019 download full paper at www. cesb. cz/19/2424 Faculty of Engineering Technology Research Group Recy. Con

3. Literature review § What is the effect of CLS on compressive strength Increase

3. Literature review § What is the effect of CLS on compressive strength Increase slightly Higher density and hardness (Carlos, 2010) Flaky particles increase the constrain (Li, 2014) Fines passing 63 μm* sieve improve the cohesion at ITZ (Kim, 1997; Donza, 2002) Figure 1. Compressive strength versus replacement * according to standard EN 12620 8 01/07/2019 download full paper at www. cesb. cz/19/2424 Faculty of Engineering Technology Research Group Recy. Con

3. Literature review § What is the effect of CLS on workability Decrease significantly

3. Literature review § What is the effect of CLS on workability Decrease significantly Many particles with non-cubical shape and rough texture (Donza, 2002; Park, 2012) High content of fines passing 80 μm sieve* (Safiddine, 2017) Washing off the particles passing 0. 25 mm sieve (Cepuritis, 2016) * according to standard NF P 18 -540 9 01/07/2019 download full paper at www. cesb. cz/19/2424 Faculty of Engineering Technology Research Group Recy. Con

Presentation overview § § § 10 1. Research background 2. Research objective 3. Literature

Presentation overview § § § 10 1. Research background 2. Research objective 3. Literature review 4. Experimental program 5. Conclusion 01/07/2019 download full paper at www. cesb. cz/19/2424 Faculty of Engineering Technology Research Group Recy. Con

4. Experimental program 2 ~ 4 mm 17. 79% 0. 25 ~ 0. 5

4. Experimental program 2 ~ 4 mm 17. 79% 0. 25 ~ 0. 5 mm 68. 76% 0 ~ 0. 125 mm 7. 13% Figure 2. Particle size distribution 11 01/07/2019 download full paper at www. cesb. cz/19/2424 Faculty of Engineering Technology Research Group Recy. Con

4. Experimental program Figure 3. Optimization by Bolomey’s curve 12 01/07/2019 download full paper

4. Experimental program Figure 3. Optimization by Bolomey’s curve 12 01/07/2019 download full paper at www. cesb. cz/19/2424 No sea sand in the mixture Faculty of Engineering Technology Research Group Recy. Con

4. Experimental program Table 3. Mixture of MIX 1 ~ MIX 9 Mixture MIX

4. Experimental program Table 3. Mixture of MIX 1 ~ MIX 9 Mixture MIX 1 MIX 2 MIX 3 MIX 4 MIX 5 MIX 6 MIX 7 MIX 8 MIX 9 Figure 4. Compressive strength and density of MIX 1 ~ MIX 9 13 01/07/2019 download full paper at www. cesb. cz/19/2424 SS/CLS * 3: 3 0: 6 1: 5 3: 3 6: 0 5: 1 3: 3 2: 4 4: 2 WR 0. 34% 0. 25% 0% 0% 0% SP 1. 220% 0% 0. 325% * Ratio of sea sand to crushed limestone sand by weight Faculty of Engineering Technology Research Group Recy. Con

4. Experimental program Table 3. Mixture of MIX 1 ~ MIX 9 MIX 1

4. Experimental program Table 3. Mixture of MIX 1 ~ MIX 9 MIX 1 collapsed MIX 4 tend to shear MIX 2 collapsed MIX 3 collapsed MIX 5 true MIX 3 true Mixture MIX 1 MIX 2 MIX 3 MIX 4 MIX 5 MIX 6 MIX 7 MIX 8 MIX 9 SS/CLS 3: 3 0: 6 1: 5 3: 3 6: 0 5: 1 3: 3 2: 4 4: 2 WR 0. 34% 0. 25% 0% 0% 0% SP 1. 220% 0% 0. 325% When SS/CLS = 1: 5 ~ 3: 3, better workability MIX 7 true 14 01/07/2019 MIX 8 true download full paper at www. cesb. cz/19/2424 MIX 9 true Faculty of Engineering Technology Research Group Recy. Con

4. Experimental program Table 3. Mixture of MIX 10 ~ MIX 17 Mixture C

4. Experimental program Table 3. Mixture of MIX 10 ~ MIX 17 Mixture C [kg/m 3] W/C Sand ratio SS/CLS WR SP MIX 10 295 0. 57 46. 2% 1: 5 0. 25% 0. 975% MIX 11 295 0. 57 50. 7% 1: 5 0. 25% 0. 975% MIX 12 310 0. 57 46. 2% 1: 5 0. 25% 0. 975% MIX 13 295 0. 57 55. 0% 1: 5 0. 25% 0. 650% MIX 14 295 0. 57 40. 0% 1: 5 0. 25% 0. 650% MIX 15 310 0. 57 40. 0% 1: 5 0. 25% 0. 650% MIX 16 310 0. 57 50. 7% 1: 5 0. 25% 0. 650% MIX 17 325 0. 57 52. 8% 1: 5 0. 25% 0. 325% 15 01/07/2019 download full paper at www. cesb. cz/19/2424 Increase paste volume Increase cohesiveness Decrease paste demand Increase flowability Faculty of Engineering Technology Research Group Recy. Con

4. Experimental program Basically same Figure 5. Compressive strength and density of MIX 10

4. Experimental program Basically same Figure 5. Compressive strength and density of MIX 10 ~ MIX 17 16 01/07/2019 download full paper at www. cesb. cz/19/2424 Faculty of Engineering Technology Research Group Recy. Con

4. Experimental program 17 160 MIX 10 shear 155 MIX 11 shear 220 MIX

4. Experimental program 17 160 MIX 10 shear 155 MIX 11 shear 220 MIX 12 collapsed 85 MIX 13 true 105 MIX 14 shear 165 MIX 15 collapsed 160 MIX 16 true 160 MIX 17 true 01/07/2019 download full paper at www. cesb. cz/19/2424 An increase in cement An increase in sand ratio Reasonable doses of WR and SP Faculty of Engineering Technology Research Group Recy. Con

Presentation overview § § § 18 1. Research background 2. Research objective 3. Literature

Presentation overview § § § 18 1. Research background 2. Research objective 3. Literature review 4. Experimental program 5. Conclusion 01/07/2019 download full paper at www. cesb. cz/19/2424 Faculty of Engineering Technology Research Group Recy. Con

5. Conclusion § Based on literature review and an experimental study, it can be

5. Conclusion § Based on literature review and an experimental study, it can be concluded: The use of crushed limestone sand tends to increase the strength slightly, and decrease the workability significantly, due to its large amount of angular particles and fines; Joint use of sea sand crushed limestone sand is better, due to the correction with each other; The replacement ratio ranging from 1: 5 to 3: 3 has a better performance; Concrete with C 25/30, S 4 and qualified cohesiveness was developed when replacement ratio is 1: 5. 19 01/07/2019 download full paper at www. cesb. cz/19/2424 Faculty of Engineering Technology Research Group Recy. Con

Xiaoguang CHEN xiaoguang. chen@kuleuven. be

Xiaoguang CHEN xiaoguang. chen@kuleuven. be

Experimental Study on the Optimization of Crushed LimestoneExperimental Study on the Optimization of Crushed Limestone
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Limestone Rock Cycle By Leah and Evan LimestoneLimestone Rock Cycle By Leah and Evan Limestone
Limestone Name some chemicals in the limestone cycleLimestone Name some chemicals in the limestone cycle
Limestone Limestone and its Uses WALT Explain someLimestone Limestone and its Uses WALT Explain some
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Multiobjective Optimization Multiobjective Optimization Some optimization problems haveMultiobjective Optimization Multiobjective Optimization Some optimization problems have
linear optimization u nonlinear optimization u quadratic optimizationlinear optimization u nonlinear optimization u quadratic optimization
linear optimization u nonlinear optimization u quadratic optimizationlinear optimization u nonlinear optimization u quadratic optimization
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