1 Henry Limantono 3111100006 Supervisors : CIVIL ENGINEERING - PowerPoint PPT Presentation

1 Henry Limantono 3111100006 Supervisors : CIVIL ENGINEERING DEPARTMENT Prof. Dr. Ir. Triwulan, DEA FACULTY OF CIVIL ENGINEERING AND PLANNING SEPULUH NOPEMBER INSTITUTE OF TECHNOLOGY SURABAYA Dr. Eng. Januarti Jaya Ekaputri, ST., MT. 2015

2 Victor C. Li (2002)

on high strength concrete fume basic and fibrous pastes with composition of glass powder and silica fume 3  Analyze the effect of glass powder and silica fume  Identify the characteristic of glass powder and silica  Identify physical and mechanical characteristic

4 Focus Materials : Glass Powder, Silica Fume, and PVA Fiber Glass Powder Silica Fume OPC Chemical Admixture (High Range Water Reducer) Tap Water Polyvinyl Alcohol (PVA) Fiber

5 pastes with the highest 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 compressive strength on 28 Strength days PVA Fibers content 2% from specimen volume W/B 0.25 Moist Curing Density Compressive Strength XRD SEM Setting Time Porosity Setting Time Compressive ORDINARY Reactivity 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, SEM Density BASIC PASTES 2) CYLINDER MOLD DIAMETER 2 CM HEIGHT 4 CM FIBROUS PASTES 3) CYLINDER MOLD DIAMETER 2 CM HEIGHT 4 CM Split Tensile

6 SiO 2 < 4 % > 70 % SiO 2 Al 2 O 3 CaO 100 µm MgO Na 2 O Fe 2 O 3 SO 3 LOI 71.73% 1.73% 7.87% 4.59% 12.45% 0.54% 0.20% 0.89% 1800 600 µm Before Grinding : > 600 µm 1600 1400 After Grinding : < 100 µm Intensitas (cps) 1200 1000 800 600 400 200 0 0 10 20 30 40 50 60 70 80 ° 2 Theta

7 180 µm 2500 3.5 2000 3.04 Average Compressive Strength Silica Fume’s particle size < 180 µm 3.0 Intensitas (cps) 1500 2.5 2.0 1000 (MPa) 1.5 1.29 500 1.0 0 0.5 0 10 20 30 40 50 60 70 80 ° 2 Theta 0.0 Silica Fume Glass Powder Materials

Glass Cement Silica Fume Water Supeplastici Powder Basic (% from (% from (% from zer (% from (% from binder’s binder’s binder’s binder’s Paste binder’s weight) weight) weight) weight) weight) PA0 0 0 100 25 0.40 90 PA10-0 10 0 25 0.28 PA10-20 : 10% Glass Powder PA10-20 8 2 25 0.32 PA10-40 6 4 25 0.34 20% × 10% Silica Fume = 2% PA10-60 4 6 25 0.37 10% - 2% Glass Powder = 8% PA15-0 85 15 0 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 0 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 0 From 17 variations, 5 variation with the 25 0.30 highest compressive strength at 28 days PA25-20 20 5 25 0.46 were taken and added 2% PVA Fiber (by PA25-40 15 10 25 0.56 volume) PA25-60 10 15 25 0.65 8

9 Glass Powder decreases amount of superplasticizer, while silica fume increases amount of superplasticizer. 80% 45% Superplasticizer Content from Superplasticizer Content from 70% 40% 60% 35% Binder (SF+GP) 10% Binder 50% (SF+GP) 15% 30% (SF+GP) 20% 40% (SF+GP) 25% 25% 30% 20% 20% 0% 5% 10% 15% 20% 25% 0% 20% 40% 60% Glass Powder Content from Binder Silica Fume Content from Glass Powder

85.33 MPa 86.73 MPa 91.49 MPa 91.73 MPa 93.26 MPa 10 100 PA0 90 PA10-0 PA10-20 PA10-40 Compressive Strength (MPa) PA10-60 80 PA15-0 PA15-20 PA15-40 70 PA15-60 PA20-0 PA20-20 60 PA20-40 PA20-60 PA25-0 PA25-20 50 PA25-40 PA25-60 40 0 7 14 21 28 Age (days)

In general, the distance between initial and final setting time became shorter with the replacement some glass powder with silica fume. 11 GP = 10% GP = 15% GP = 20% GP = 25% 200 180 160 Setting Time (min) 140 120 100 80 60 40 Basic Pastes Final Setting Time Initial Setting Time

been Basic pastes with w/b 0.2 have higher w/b 0.25. Because the consistency normal was very difficult large enough shrinkage with w/b 0.2, then w/b was increased to 0.25. 12 w/b 0.20 w/b 0.25 and concern have compressive strength than basic pastes with 100 90 Compressive Strength (MPa) PA0 PA10-0 80 PA10-20 PA10-40 70 PA10-60 PA0 PA10-0 60 PA10-20 PA10-40 50 PA10-60 w/b 0.2 40 w/b 0.25 3 7 14 21 28 Age (days)

13 Y = Possibly cracks due to autogenous shrinkage. SEM Result: (a) Glass Powder, (b) Silica Fume, (c) Basic Paste PA10-40 at 28 days with enlargement 5 µm. Y X = There are remaining unreacted particles. Possibly SiO 2 particles from glass powder or silica fume.

The higher compressive, the lower total 14 porosity of both basic dan fibrous paste. Total Porosity (pt) Open Porosity (po) Total Porosity (pt) Open Porosity (po) Close Porosity (pf) Compressive Strength Close Porosity (pf) Compressive Strength 14 100 12 100 Compressive Strength (MPa) Compressive Strength (MPa) 12 10 95 90 10 Porosity (%) Porosity (%) 8 8 90 6 80 6 4 4 85 70 2 2 0 80 0 60 Fibrous Paste Variation Basic Paste Variation

15 Semen Glass Powder Silica Fume Air Supeplasticizer PVA Fiber Fibrous % from vol. Pastes % from binder weight binder FP0 0 0 2 100 25 0.40 FP10-20 8 2 2 90 25 0.32 FP10-40 6 4 2 90 25 0.34 FP15-40 9 6 2 85 25 0.50 FP15-60 85 6 9 25 0.60 2 FP20-20 80 16 4 25 0.50 2 Selected from 5 basic pastes with the highest FP10-20 : 10% Glass Powder compressive strength and 1 control variable. 20% × 10% Silica Fume = 2% 10% - 2% Glass Powder = 8%

16 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. 100 FP0 FP10-20 90 FP10-40 FP15-40 Compressive Strength (MPa) FP15-60 80 FP20-20 PA0 PA10-20 70 PA10-40 PA15-40 PA15-60 60 PA20-20 Fibrous Pastes 50 Basic Pastes 40 3 7 14 21 28 Age (days)

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%. Pasta Berserat (FP) Pasta Dasar (PA) Fibrous Pastes Basic Pastes 12 Split Tensile Strength (MPa) 11 10 9 8 7 6 5 4 0 10-20 10-40 15-40 15-60 20-20 Pastes Variation

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 FP15-60 PA15-60 40 35 Penetration (mm) 30 25 20 15 10 5 0 23 124 0 50 100 150 200 Time (min)

19 1. Glass powder and silica fume are amorphous mineral consist of SiO 2 . 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.

20 THANK YOU