Dyckerhoff MIKRODUR ® R-U is a highly refined light gray special cement based on granulated slag, specially designed for the preparation of injectable cement suspensions and as an additive in the formulation of high-strength and highly flowable concretes. MIKRODUR ® R-U improves the processing properties of grouting concrete, increases packing density, strength and durability, enabling the production of ultra high-strength concrete (UHPC) without the use of other common fines such as microsilica or metakaolin.
Recipe recommendations: The use of a PCE superplasticizer is required. We recommend our superplasticizer FLUP®-PCE-343. For the injection procedure (injection of a cement suspension into loose rock) MIKRODUR® R-U is mixed only with superplasticizer and water at w/c values between 0.6 and 2. For high strength concrete formulations, the recommended dosage of MIKRODUR® R-U is 15 to 20% of the amount of normal cement contained and the recommended w/c value is 0.32.
High-strength and ultra-high-strength concretes based on MIKRODUR® R-U can be mixed comparatively easily and do not necessarily require the use of a compulsory mixer.
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