For civil engineering applications requiring rapid structural strength, Megapoxy 108 is a rapid-setting liquid epoxy binder formulated for splicing bridge piles and executing high-strength repairs to precast concrete. Its fast compressive and impact strength development allows pile driving operations to resume with minimal downtime, achieving compressive strengths exceeding 95 MPa after 2 hours at 22°C.
Moisture-tolerant curing mechanism
Megapoxy 108 is a hydrophilic resin. This chemistry allows the binder to cure reliably in the presence of moisture, preventing failure when bonding damp concrete substrates. When mixed as a liquid binder, it provides a clear, pourable system. For structural repairs on precast concrete, it can be combined with silica 50N sand to produce a rapid-setting, high-strength epoxy mortar that resists heavy mechanical loads.
Numbers that matter
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8-minute work time (at 25°C): A highly fast pot life requiring rapid mixing, application, and alignment of bridge piles before the initial set occurs.
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120 MPa compressive strength: Ultimate cured compressive capacity to withstand high impact forces during resumed pile driving.
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2-hour minimum cure (at 25°C): Rapid strength development window, curing in 1 hour at 35°C and 4 hours at 15°C to minimise structural installation delays.
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4:1 mix ratio: Precise batching requirement of 4 parts Part A to 1 part Part B by volume to ensure complete cross-linking and full chemical cure.
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75 minimum Shore D hardness (ASTM D2240-00): High cured surface hardness to resist indentation, wear, and mechanical damage under heavy civil loads.
Mortar preparation
To produce a rapid-setting epoxy mortar for precast concrete repairs, premix one volume of mixed Megapoxy 108 liquid (4 parts Part A to 1 part Part B) in a plastic bucket. While mixing, gradually add three volumes of silica 50N sand. Mix using a slow-speed drill (approximately 200 rpm) fitted with a propeller-type stirrer to prevent excessive air entrapment.
Limitations
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Minimum application temperature: Do not apply if the substrate or ambient temperature is below 10°C, as the cure reaction will retard.
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Maximum operating temperature: The cured system must not be exposed to continuous service temperatures exceeding 80°C.
Clean-up
Clean all mixing implements, trowels, and application tools immediately after use with Megapoxy Thinners before the epoxy cures.
