SLIDE 1 Henry Limantono 3111100006 Supervisors :
- Prof. Dr. Ir. Triwulan, DEA
- Dr. Eng. Januarti Jaya Ekaputri, ST., MT.
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CIVIL ENGINEERING DEPARTMENT FACULTY OF CIVIL ENGINEERING AND PLANNING SEPULUH NOPEMBER INSTITUTE OF TECHNOLOGY SURABAYA 2015
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2 Victor C. Li (2002)
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- Analyze the effect of glass powder and silica fume
- n high strength concrete
- Identify the characteristic of glass powder and silica
fume
- Identify physical and mechanical characteristic
basic and fibrous pastes with composition of glass powder and silica fume
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Glass Powder Silica Fume OPC Chemical Admixture
(High Range Water Reducer)
Tap Water Polyvinyl Alcohol (PVA) Fiber
Focus Materials : Glass Powder, Silica Fume, and PVA Fiber
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ORDINARY PORTLAND CEMENT
GLASS POWDER SILICA FUME PVA FIBER
MATERIALS ANALYSIS 1)
Density, Normal Consistency, Setting time Density, PSA, XRF, XRD, SEM, Reactivity Density, PSA, XRD, SEM, Reactivity SEM
BASIC PASTES 2)
CYLINDER MOLD DIAMETER 2 CM HEIGHT 4 CM
FIBROUS PASTES 3)
CYLINDER MOLD DIAMETER 2 CM HEIGHT 4 CM Density Compressive Strength Setting Time Porosity Split Tensile Glass Powder Variation: 10%, 15%, 20%, 25% binder weight Silica Fume Variation: 20%, 40%, 60% glass powder weight W/B 0.25 Moist Curing 5 Composition from basic pastes with the highest compressive strength on 28 days PVA Fibers content 2% from specimen volume W/B 0.25 Moist Curing Density Compressive Strength XRD SEM Setting Time Porosity Split Tensile
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SiO2 Al2O3 CaO MgO Na2O Fe2O3 SO3 LOI 71.73% 1.73% 7.87% 4.59% 12.45% 0.54% 0.20% 0.89%
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> 70 % < 4 %
200 400 600 800 1000 1200 1400 1600 1800 10 20 30 40 50 60 70 80 Intensitas (cps) °2 Theta
SiO2
600 µm
Before Grinding : > 600 µm After Grinding : < 100 µm
100 µm
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500 1000 1500 2000 2500 10 20 30 40 50 60 70 80 Intensitas (cps) °2 Theta
Silica Fume’s particle size < 180 µm
180 µm
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1.29 3.04 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 Silica Fume Glass Powder Average Compressive Strength (MPa) Materials
SLIDE 8 Basic Paste Cement (% from binder’s weight) Glass Powder (% from binder’s weight) Silica Fume (% from binder’s weight) Water (% from binder’s weight) Supeplastici zer (% from binder’s weight) PA0 100 25 0.40 PA10-0 90 10 25 0.28 PA10-20 8 2 25 0.32 PA10-40 6 4 25 0.34 PA10-60 4 6 25 0.37 PA15-0 85 15 25 0.25 PA15-20 12 3 25 0.40 PA15-40 9 6 25 0.50 PA15-60 6 9 25 0.60 PA20-0 80 20 25 0.33 PA20-20 16 4 25 0.50 PA20-40 12 8 25 0.61 PA20-60 8 12 25 0.75 PA25-0 75 25 25 0.30 PA25-20 20 5 25 0.46 PA25-40 15 10 25 0.56 PA25-60 10 15 25 0.65 8
PA10-20 : 10% Glass Powder 20% × 10% Silica Fume = 2% 10% - 2% Glass Powder = 8% From 17 variations, 5 variation with the highest compressive strength at 28 days were taken and added 2% PVA Fiber (by volume)
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20% 25% 30% 35% 40% 45% 0% 5% 10% 15% 20% 25% Superplasticizer Content from Binder Glass Powder Content from Binder
20% 30% 40% 50% 60% 70% 80% 0% 20% 40% 60%
Superplasticizer Content from Binder
Silica Fume Content from Glass Powder (SF+GP) 10% (SF+GP) 15% (SF+GP) 20% (SF+GP) 25%
Glass Powder decreases amount of superplasticizer, while silica fume increases amount of superplasticizer.
SLIDE 10 40 50 60 70 80 90 100 7 14 21 28 Compressive Strength (MPa) Age (days) PA0 PA10-0 PA10-20 PA10-40 PA10-60 PA15-0 PA15-20 PA15-40 PA15-60 PA20-0 PA20-20 PA20-40 PA20-60 PA25-0 PA25-20 PA25-40 PA25-60
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93.26 MPa 91.73 MPa 91.49 MPa 86.73 MPa 85.33 MPa
SLIDE 11 In general, the distance between initial and final setting time became shorter with the replacement some glass powder with silica fume.
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40 60 80 100 120 140 160 180 200 Setting Time (min) Basic Pastes Initial Setting Time Final Setting Time GP = 10% GP = 15% GP = 20% GP = 25%
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40 50 60 70 80 90 100 3 7 14 21 28 Compressive Strength (MPa) Age (days) PA0 PA10-0 PA10-20 PA10-40 PA10-60 PA0 PA10-0 PA10-20 PA10-40 PA10-60
Basic pastes with w/b 0.2 have higher compressive strength than basic pastes with w/b 0.25. Because the consistency normal was very difficult and concern have been large enough shrinkage with w/b 0.2, then w/b was increased to 0.25.
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w/b 0.20 w/b 0.25
w/b 0.2 w/b 0.25
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X = There are remaining unreacted particles. Possibly SiO2 particles from glass powder or silica fume. Y = Possibly cracks due to autogenous shrinkage.
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SEM Result: (a) Glass Powder, (b) Silica Fume, (c) Basic Paste PA10-40 at 28 days with enlargement 5 µm.
Y
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The higher compressive, the lower total porosity of both basic dan fibrous paste.
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60 70 80 90 100 2 4 6 8 10 12 Compressive Strength (MPa) Porosity (%) Basic Paste Variation Total Porosity (pt) Open Porosity (po) Close Porosity (pf) Compressive Strength 80 85 90 95 100 2 4 6 8 10 12 14 Compressive Strength (MPa) Porosity (%) Fibrous Paste Variation Total Porosity (pt) Open Porosity (po) Close Porosity (pf) Compressive Strength
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FP10-20 : 10% Glass Powder 20% × 10% Silica Fume = 2% 10% - 2% Glass Powder = 8% Selected from 5 basic pastes with the highest compressive strength and 1 control variable.
Fibrous Pastes Semen Glass Powder Silica Fume Air Supeplasticizer PVA Fiber % from binder weight % from vol. binder FP0 100 25 0.40 2 FP10-20 90 8 2 25 0.32 2 FP10-40 90 6 4 25 0.34 2 FP15-40 85 9 6 25 0.50 2 FP15-60 85 6 9 25 0.60 2 FP20-20 80 16 4 25 0.50 2
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The addition of PVA fiber to control variable paste increased compressive strength by 24.74%. For PA15-60 increased to 20.51%. In general, the addition of PVA fibers in the basic pastes increase the compressive strength of pasta.
40 50 60 70 80 90 100 3 7 14 21 28 Compressive Strength (MPa) Age (days) FP0 FP10-20 FP10-40 FP15-40 FP15-60 FP20-20 PA0 PA10-20 PA10-40 PA15-40 PA15-60 PA20-20 Fibrous Pastes Basic Pastes
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17 The addition of PVA fibers to basic pastes increase split tensile strength by 92.86 – 195.48%. The addition of PVA fibers to control variable (100% OPC) increase split tensile strength by 129.67%.
4 5 6 7 8 9 10 11 12 10-20 10-40 15-40 15-60 20-20 Split Tensile Strength (MPa) Pastes Variation Pasta Berserat (FP) Pasta Dasar (PA) Fibrous Pastes Basic Pastes
SLIDE 18 By adding PVA fibers, fibrous paste initial and final setting time became faster than basic paste. FP = Before adding fibers PA = After adding fibers 18
23 124
5 10 15 20 25 30 35 40 50 100 150 200 Penetration (mm) Time (min) FP15-60 PA15-60
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- 1. Glass powder and silica fume are amorphous mineral consist of SiO2. Glass
Powder is more reactive than Silica Fume.
- 2. Glass powder decrease, while silica fume increase amount of superplasticizer.
- 3. Replacement cement weight with glass powder and silica fume increased
compressive strength at 28 days.
- 4. The distance between initial and final setting time became shorter with the
replacement some glass powder with silica fume.
- 5. The addition of PVA fibers to basic pastes increase split tensile strength.
- 6. The higher compressive, the lower total porosity.
- 7. By adding PVA fibers initial and final setting time became faster.
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