Material property and quality control specifications for elastomeric concrete used at bridge deck joints : final report - Page 74 |
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67
important to note that the 5% deflection resilience minimum requirement is listed for the test methods
described in this study. Table 7- 2 shows the current NCDOT minimum requirements in comparison to
the newly proposed minimum requirements of a complete elastomeric concrete mix. It is clear from
Table 7- 3 that 3 products satisfy the new requirements except the binder ultimate elongation value, which
might still be too conservative ( and is related to the splitting tensile strength, for which the proposed new
limit is being met by only 4 products). Binder ultimate elongation might not be as relevant to product
long- term performance; however, without further durability tests the current minimum value should not
be changed.
Table 7- 2. Comparison of existing and proposed minimum requirements
Testing Method Existing NCDOT Min.
Requirements Proposed Min. Requirements
Tensile Strength ( psi) 800 1000
Tear Strength ( lb/ in) 90 200
Ultimate Elongation (%) 150 150
Compressive Strength ( psi) 2800 2200
5% Deflection Resilience - 95
Splitting Tensile Strength ( psi) - 625
Bond Strength ( psi) 450 450
Impact Resistance ( ft- lbs) 7 -
Durometer Hardness - 50
Table 7- 3. Lab mixed results compliance with proposed NCDOT specifications
Product
Binder
Tensile
Binder
Ult. El.
Binder
Tear
EC
Compr.
EC
5% Defl.
EC
Split T.
EC
Bond
EC
Hardness
Ply- Krete √ √ √ √
Ply- Krete HT √ √ √ √ √ √
Ply- Krete HS √ √ √ √ √ √ √
Ply- Krete LV √ √ √ √ √ √ √
E- Crete 57 √ √ √
Ceva Crete √ √ √ √ √ √
WaboCrete II √ √ √ √ √ √
ProCrete NH √ √ √ √ √ √ √
ProCrete Plus √ √ √ √ √
DelCrete √ √
Tron- Flex √ √ √
Object Description
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| Title | Material property and quality control specifications for elastomeric concrete used at bridge deck joints : final report - Page 74 |
| Full Text | 67 important to note that the 5% deflection resilience minimum requirement is listed for the test methods described in this study. Table 7- 2 shows the current NCDOT minimum requirements in comparison to the newly proposed minimum requirements of a complete elastomeric concrete mix. It is clear from Table 7- 3 that 3 products satisfy the new requirements except the binder ultimate elongation value, which might still be too conservative ( and is related to the splitting tensile strength, for which the proposed new limit is being met by only 4 products). Binder ultimate elongation might not be as relevant to product long- term performance; however, without further durability tests the current minimum value should not be changed. Table 7- 2. Comparison of existing and proposed minimum requirements Testing Method Existing NCDOT Min. Requirements Proposed Min. Requirements Tensile Strength ( psi) 800 1000 Tear Strength ( lb/ in) 90 200 Ultimate Elongation (%) 150 150 Compressive Strength ( psi) 2800 2200 5% Deflection Resilience - 95 Splitting Tensile Strength ( psi) - 625 Bond Strength ( psi) 450 450 Impact Resistance ( ft- lbs) 7 - Durometer Hardness - 50 Table 7- 3. Lab mixed results compliance with proposed NCDOT specifications Product Binder Tensile Binder Ult. El. Binder Tear EC Compr. EC 5% Defl. EC Split T. EC Bond EC Hardness Ply- Krete √ √ √ √ Ply- Krete HT √ √ √ √ √ √ Ply- Krete HS √ √ √ √ √ √ √ Ply- Krete LV √ √ √ √ √ √ √ E- Crete 57 √ √ √ Ceva Crete √ √ √ √ √ √ WaboCrete II √ √ √ √ √ √ ProCrete NH √ √ √ √ √ √ √ ProCrete Plus √ √ √ √ √ DelCrete √ √ Tron- Flex √ √ √ |
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