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Composite airport concrete pavement with the enriched limestone quarry waste as a coarse aggregated for concrete of subbase
Composite airport concrete pavement with the enriched limestone quarry waste as a coarse aggregated for concrete of subbase
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机译：复合机场混凝土路面，以丰富的石灰石采石场废料为粗骨料，用于路基混凝土
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摘要
Composite concrete pavement includes the surface course of normal concrete of thickness determined by requirements for abrasion resistance and subbase of concrete with coarse aggregate defined as enriched limestone waste of grading intermediate between the coarse and fine aggregates. 28-day specified compressive strength and modulus of rupture of this concrete amount up to 5,000 and 750 psi, respectively, and 90-day modulus of rupture (MR) amount up at least to 800 psi. Coarse aggregate of this concrete is enriched by-product of manufacture of crushed limestone of regular sizes. As a raw material for enrichment it should be coarser than 9.5 mm and finer than 4.75 mm. The amount of aggregate finer than 4.75 mm should be close to but not exceed ⅔ of total weight of aggregate in aggregate bin. The amount of aggregate finer than 2.36 mm, and 300 μm should not exceed 10%, and 2% of total weight of aggregate in aggregate bin, respectively.
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