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男性,57岁,因急性下壁心肌梗死入院。检查:BP 80/50mmHg,心率32次/分,律齐,最可能的心律失常是( )
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Hydrophilic (water-loving) aggregates, such as silicates, have a greater affinity for water than for asphalt. They are usually acidic and have a ______ surface charge.
Gap-graded aggregates are missing one or more sizes of material. Their gradation curve has a near horizontal section indicating that nearly the same portions of the aggregates pass two different sieve sizes. ______ aggregates are missing small aggregate sizes that would block the voids between the larger aggregate. Since there are a lot of voids, the material will be highly permeable, but may not have good stability.
According to the ASTM D4791, an aggregate particle with the longest dimension to the middle dimension of the particle exceeds the 3 to 1 is an______ particle.
Setting time include______ and ______ time
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