6541b49b-9f87-42c5-9197-25332967d18b.pdf
ACN 109 200 900
AUSTRALIAN SECURITIES EXCHANGE ANNOUNCEMENT
3 June 2016
EDENCRETETM - US UPDATE
ASTM C494 S TESTING- 180 DAY TEST DATA UPDATE HIGHLIGHTS
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Freeze/ Thaw Resistance (or Durability Factor) enhanced by 9.5% (from 88% to 96.4%) by the addition of EdenCreteTM (ASTM C666)
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180 Day Compressive Strength increased by 38% by the addition of EdenCreteTM (ASTM C39)
DETAILS
Eden Energy Limited ("Eden") (ASX: EDE) is pleased to announce that it has successfully completed the 180-day tests that are being conducted under its current ASTM C494, Type S Test program (the umbrella standard to compare the performance of specialty admixtures) of EdenCreteTM, its carbon nanotube enriched liquid concrete admixture.
Significantly the following results were achieved:
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Freeze/Thaw resistance (or Durability Factor) enhanced by 9.5% over the reference (from 88% to 96.4%) by the addition of EdenCreteTM (ASTM C666) which is regarded as a significant improvement by industry professionals; and
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180 Day Compressive Strength increased by 38% over the reference by the addition of EdenCreteTM (ASTM C39), continuing the trend of significantly increased compressive strength over the 180 day period.
Level 15, 197 St Georges Terrace, Perth, Western Australia 6000 Telephone: (08) 9282 5889 Facsimile: (08) 9282 5866
Email: [email protected]
The broad suite of ASTM C494, Type S results continues to show, across a wide range of performance characteristics, the very considerable improvement in the performance of concrete when EdenCreteTM is added.
The ASTM C494, Type S results that have been received to date are set out in Figure 1 below. With the exception of the 365 day Compressive Strength test that will be completed in December 2016, all other testing is complete for the ASTM C494 test program. The exceptional performance demonstrated by EdenCreteTM is expected to become increasingly relevant in the future marketing of EdenCreteTM.
Figure 1 - ASTM C494 S Test Results (including 180 day data)
Freeze/Thaw Resistance
Freeze/ thaw resistance is of great importance in relation to the performance of concrete that is exposed to water in freezing conditions. Water permeates into the concrete and expands when it freezes, and the resulting stresses cause cracks to propagate and expand with exposure to repeated freeze/thaw events.
It is of great relevance to the service life of concrete roads, bridge decks and other concrete surfaces and structures in colder climates where the temperature regularly falls below the freezing point of water during winter. It is even more important in circumstances where the concrete has steel reinforcement, and salt or other chemicals which dissolve in water and cause corrosion of the steel and a breakdown of the concrete, are present in the local environment (such as in marine and coastal situations) or are applied to the concrete (such as on roads) to retard the build-up of ice.
ASTM C494 is a standard specification that provides guidelines regarding which ASTM test methods are required for evaluating different performance characteristics of chemical admixtures. ASTM C666 is the test standard designated for measuring the durability of the concrete when submerged in water and exposed to the stresses
associated with rapid and repeated freeze/thaw cycles. The procedure is assumed to have no significantly damaging effects on frost-resistant concrete (any concrete not critically saturated with water -i.e. not sufficiently saturated to be damaged by freezing and concrete made with frost-resistant aggregates and having an adequate air-void system that has achieved appropriate maturity and thus will prevent critical saturation by water under common conditions).
The procedure is not intended to provide a quantitative measure of the length of service that may be expected from a specific type of concrete. It is, however, intended for use in determining the effects of variations in the properties of concrete containing the admixture under review and its resistance to degradation over time, due to the freezing- and-thawing cycles specified in the procedure.
The results from freeze/thaw testing indicate EdenCreteTM, by itself, enhances the Durability Factor (or resistance to freeze/thaw cycles) by 9.5% over the reference, which is considered to be a material improvement by industry professionals.
It should be noted that, in strict accordance with the ASTM C494 Specification, the water content was held constant for both the Reference and the EdenCrete mixtures, and no additional supplementary cementitious materials were used in the mixes. In the field, however, the workability of the mix may be slightly increased with the addition of EdenCreteTM that will allow for a slight reduction in water or the dosage rate of the high- range water-reducing admixture while achieving the same slump specification. This type of mix optimization may not only reduce the cost of the concrete, but could result in the concrete having an even higher resistance to the stresses associated with freeze/thaw cycles.
Further tests are planned to be conducted by Eden Innovations in Colorado, using an identical concrete mix as was used in the ASTM C494 tests, to determine the maximum level of Freeze/Thaw resistance that can be achieved when EdenCreteTM is incorporated into the mix.
I-20 FIELD TRIAL UPDATE
As previously announced (ASX Announcement- ASX: EDE 10 December 2015), EdenCreteTM has been approved for use by the Georgia Department of Transportation in its 24 hour concrete repair mix and recommended for a further field trial in its Class A concrete mix used in new construction, following an August, 2015 field trial of EdenCrete TM in two slabs on Interstate Highway I-20 in Augusta, Georgia, near the State of Georgia Welcome Centre, adjoining the border with South Carolina.
The concrete slabs laid down in this first, ongoing field trial (including several saw cuts made by GDOT into the slabs) are shown in Figure 2 below, and can be seen in greater detail by scrolling around on Google Maps/ Street View (updated in January 2016) at the following link:
https:[email protected],- 82.0195653,3a,58.5y,235.27h,81.68t/data=!3m6!1e1!3m4!1sas_kPk39N75cv4GTHcoAHw!2e0!
7i13312!8i6656
Figure 2 - Google Maps/ Street View photo of I-20
BACKGROUND
EdenCreteTM is Eden's 100% owned, proprietary carbon-strengthened concrete additive, one of the primary target markets for which is improving the performance of concrete used in the construction and maintenance of concrete roads, bridges and other infrastructure. Additionally, it has potential for use in a range of other applications including high-rise building construction, marine and coastal applications, water storage and pipelines, and pre-fabricated concrete structures and products.
Gregory H. Solomon
Executive Chairman