High Performance Topping Material for Semi-Rigid Pavement for - - PowerPoint PPT Presentation

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13 th SINGAPORE SYMPOSIUM ON PAVEMENT TECHNOLOGY (SPT 2008) High Performance Topping Material for Semi-Rigid Pavement for

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13th SINGAPORE SYMPOSIUM ON PAVEMENT TECHNOLOGY (SPT 2008)

High Performance Topping Material for Semi-Rigid Pavement

凯密林克 凯密林克 凯密林克 凯密林克™ 凯密林克 凯密林克 凯密林克 凯密林克™

for Semi-Rigid Pavement

Dr Wu Dong Qing Sun Dao Jun Chemilink Technologies Group, Singapore Chemilink Technologies Group, Singapore wu@chemilink.com.sg daojun_sun@chemilink.com.sg

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13th SINGAPORE SYMPOSIUM ON PAVEMENT TECHNOLOGY (SPT 2008)

凯密林克 凯密林克 凯密林克 凯密林克™ 凯密林克 凯密林克 凯密林克 凯密林克™

Table of Contents

  • 1. Introduction
  • 2. Topping Materials
  • 3. Composite and Components
  • 3. Composite and Components
  • 4. Semi-Rigid Pavement
  • 5. Application Procedures
  • 6. Completed Projects (Examples)
  • 7. Conclusions
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  • 1. Introduction

As traffic intensity / frequency, axle loading and aircraft size continue to increase, so does the demand for improved airfield and road pavements to cater for the increasingly heavy wear and tear of the pavements. Challenges:

13th SINGAPORE SYMPOSIUM ON PAVEMENT TECHNOLOGY (SPT 2008)

Challenges: design and construction of durable, low-maintenance and economical pavements; difficulty in scheduling the repair of concrete pavement, e.g. airports, seaports and road junctions (months of demolishing and strength development) Composite pavement as a wearing course:

  • pen AC + topping material = semi-rigid (days of work)
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凯密林克 凯密林克 凯密林克 凯密林克™ 凯密林克 凯密林克 凯密林克 凯密林克™

  • 2. Topping Materials

Difficulties in producing topping materials: For example: Flowability

13th SINGAPORE SYMPOSIUM ON PAVEMENT TECHNOLOGY (SPT 2008)

Strengths and Modulus Balance of the above two

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凯密林克 凯密林克 凯密林克 凯密林克™ 凯密林克 凯密林克 凯密林克 凯密林克™

  • 2. Topping Materials

13th SINGAPORE SYMPOSIUM ON PAVEMENT TECHNOLOGY (SPT 2008)

ChemilinkTM SS-141 High performance polymer modified cementitious material High workability

  • Easy application

High early strength

  • Early opening to traffic

High long-term strength Low maintenance Requires only the addition of water to produce a highly flowable mixture Result of extensive research work with the introduction of nano-technology.

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凯密林克 凯密林克 凯密林克 凯密林克™ 凯密林克 凯密林克 凯密林克 凯密林克™

  • 2. Topping Materials

Properties Test Methods Typical Values of SS-141 Workability (Flowability) ASTM C939

  • 10 ~ 14 seconds

JASS 15 [1]

  • 200 ~ 250 mm

12 hrs

  • 20 ~ 30 MPa

1 day

  • 55 ~ 70 MPa

13th SINGAPORE SYMPOSIUM ON PAVEMENT TECHNOLOGY (SPT 2008)

Compressive Strength EN 12190 1 day

  • 55 ~ 70 MPa

7 days

  • 85 ~ 100 MPa

28 days

  • 115 ~ 140 MPa

Flexural Strength at 28 days EN 196

  • 7 ~ 15 MPa

Setting Time EN 196

  • 4 ~ 6 h (normal setting)
  • 2 ~ 3 h (fast setting)

[1] Optional at the jobsite

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凯密林克 凯密林克 凯密林克 凯密林克™ 凯密林克 凯密林克 凯密林克 凯密林克™

  • 2. Topping Materials

Comparison Items SS-141 [1] SS-141-A [2] SS-141-B [3] Workability (flow), sec 10 ~ 14 10 ~ 14 10 ~ 14 Comp. Strength, 12 hrs 25 10 < 5 1 day 60 50 15

13th SINGAPORE SYMPOSIUM ON PAVEMENT TECHNOLOGY (SPT 2008)

Strength, MPa 7 days 90 80 30 28 days 130 110 40 Setting Time, hours Normal 4 ~ 6 7 ~ 9

  • Fast

2 ~ 3

  • 2 ~ 3

[1] typical values; [2] similar to Malaysian Standard; [3] similar to Singapore Standard.

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  • 2. Topping Materials

13th SINGAPORE SYMPOSIUM ON PAVEMENT TECHNOLOGY (SPT 2008)

Comparison of Topping Materials

100 120 140 20 40 60 80 120 240 360 480 600 720 Curing Age, hours Strength, MPa SS-141 SS-141-A SS-141-B

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凯密林克 凯密林克 凯密林克 凯密林克™ 凯密林克 凯密林克 凯密林克 凯密林克™

  • 2. Topping Materials

Compressive Strength development with curing time at different w/s

R

2 = 0.99

R

2 = 0.94

120 140 160 gth, MPa 13th SINGAPORE SYMPOSIUM ON PAVEMENT TECHNOLOGY (SPT 2008)

R = 0.99

20 40 60 80 100 200 400 600 800 1000 1200 Maturity, (oC.day) Compressive Strengt

w/s = 0.27 w/s = 0.20

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凯密林克 凯密林克 凯密林克 凯密林克™ 凯密林克 凯密林克 凯密林克 凯密林克™

  • 3. Composite and Components

Parallel Model (Iso-strain; upper bound): Series Model (Iso-stress; lower bound):

2 2 1 1

V E V E Ec + =

13th SINGAPORE SYMPOSIUM ON PAVEMENT TECHNOLOGY (SPT 2008)

Vi = volume fraction of components 1 and 2 Ei = modulus of components 1 and 2 Ec = modulus of composite Vi = 1, e.g. V1+V2 = 1

2 2 1 1

1 E V E V Ec + =

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凯密林克 凯密林克 凯密林克 凯密林克™ 凯密林克 凯密林克 凯密林克 凯密林克™

  • 3. Composite and Components

Given V

AC ,Vm and EAC the same for different semi-

rigid composites, Esr increases as Em increases for both parallel and series models.

13th SINGAPORE SYMPOSIUM ON PAVEMENT TECHNOLOGY (SPT 2008)

m AC

V V 1 Similarly, given V

AC ,Vm and Em the same, Esr

increases as EAC increases

sr m m AC AC

E V E V E = +

sr m m AC AC

E E V E V 1 = +

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凯密林克 凯密林克 凯密林克 凯密林克™ 凯密林克 凯密林克 凯密林克 凯密林克™

  • 3. Composite and Components

High quality SS-141 topping material leads to high performance at initial stage

  • 13th SINGAPORE SYMPOSIUM ON PAVEMENT TECHNOLOGY (SPT 2008)

high reliability of semi-rigid pavement further development of semi-rigid pavement when asphalt concrete technology advances

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凯密林克 凯密林克 凯密林克 凯密林克™ 凯密林克 凯密林克 凯密林克 凯密林克™

  • 4. Semi-Rigid Pavement

Properties Test Method Semi-Rigid Pavement (SS-141 as topping) Compressive strength at 12 hrs EN 12190

  • 3 ~ 5 MPa

Compressive strength at 1 day

  • 6 ~ 8 MPa

Compressive strength at 28 days

  • 9 ~ 12 MPa

13th SINGAPORE SYMPOSIUM ON PAVEMENT TECHNOLOGY (SPT 2008)

Compressive strength at 28 days

  • 9 ~ 12 MPa

Flexural strength at 28 days EN 12190

  • 3 MPa

Modulus ASTM D4123

  • 6,500 MPa (at 25oC)

Skid Resistance ASTM E303

  • 50 ~ 60 BPN

Impermeability DIN 18130

  • impermeable

Curing time

  • 4 ~ 8 hours
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凯密林克 凯密林克 凯密林克 凯密林克™ 凯密林克 凯密林克 凯密林克 凯密林克™

  • 4. Semi-Rigid Pavement

13th SINGAPORE SYMPOSIUM ON PAVEMENT TECHNOLOGY (SPT 2008)

Curing Age Compressive strength (MPa) of semi-rigid pavement with different topping materials SS-141 SS-141-A SS-141-B 12 hrs 3 ~ 5 0.5 ~ 2 [1] 12 hrs 3 ~ 5 0.5 ~ 2 [1] 1 day 5 ~ 8 5 ~ 7 <5 [2] 7 days 8 ~ 10 7 ~ 10

  • 28 days

9 ~ 12 8 ~ 12

  • [1] or dependent on the properties of the open AC;

[2] the strength of composite pavement is believed to be inadequate.

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凯密林克 凯密林克 凯密林克 凯密林克™ 凯密林克 凯密林克 凯密林克 凯密林克™

  • 5. Application Procedures

Porous asphalt concrete Mixing of SS-141 Flowability Check 13th SINGAPORE SYMPOSIUM ON PAVEMENT TECHNOLOGY (SPT 2008) Porous asphalt concrete Mixing of SS-141 Flowability Check Filling into porous asphalt concrete Scraping

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凯密林克 凯密林克 凯密林克 凯密林克™ 凯密林克 凯密林克 凯密林克 凯密林克™

  • 5. Application Procedures

Right after filling 13th SINGAPORE SYMPOSIUM ON PAVEMENT TECHNOLOGY (SPT 2008) Hardened surface

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凯密林克 凯密林克 凯密林克 凯密林克™ 凯密林克 凯密林克 凯密林克 凯密林克™

  • 6. Completed Projects (Examples)

Singapore Changi Airport Apron 1 (2007)

13th SINGAPORE SYMPOSIUM ON PAVEMENT TECHNOLOGY (SPT 2008)

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凯密林克 凯密林克 凯密林克 凯密林克™ 凯密林克 凯密林克 凯密林克 凯密林克™

  • 6. Completed Projects (Examples)

Singapore Changi Airport Apron 2 (2007)

13th SINGAPORE SYMPOSIUM ON PAVEMENT TECHNOLOGY (SPT 2008)

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凯密林克 凯密林克 凯密林克 凯密林克™ 凯密林克 凯密林克 凯密林克 凯密林克™

  • 6. Completed Projects (Examples)

13th SINGAPORE SYMPOSIUM ON PAVEMENT TECHNOLOGY (SPT 2008)

Heavy Loading Yard (Hanson, Singapore AC Plant, 2005)

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凯密林克 凯密林克 凯密林克 凯密林克™ 凯密林克 凯密林克 凯密林克 凯密林克™

  • 7. Conclusions

Demand for semi-rigid pavement due to increased heavy

wear and tear of pavements and difficulty in scheduling the repair work ChemilinkTM SS-141 topping

  • 13th SINGAPORE SYMPOSIUM ON PAVEMENT TECHNOLOGY (SPT 2008)

Easy application (high flowability) Early opening to traffic (high early strength) Low maintenance (high long-term strength) Given the same asphalt concrete and the same mix proportion, a higher quality topping would yield a composite pavement of better performance

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13th SINGAPORE SYMPOSIUM ON PAVEMENT TECHNOLOGY (SPT 2008)

凯密林克 凯密林克 凯密林克 凯密林克™ 凯密林克 凯密林克 凯密林克 凯密林克™