Specific amount of water should be used to prepare normal consistency of cement paste, otherwise cement properties would be influenced. Which choice in the following is the corresponding property be a
A. The values of compressive and flexural strength
B. Comparability of setting time and volume soundness
C. Release amount of hydration heat
Determination of strength grade
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Ordinary Portland cement is not suitable for（）
A. cold region
B. wet environment
C. mass concrete
D. high loading condition
Too much free-CaO or free-MgO in cement would lead to（）
A. inappropriate setting time
B. poor soundness
C. failure to meet strength requirement
D. undesirable workability
For the penetration index （PI） of asphalt binders, which of the following statementis true（）
A. the higher the PI, the greater the penetrationvalue
B. the higher the PI, the less the temperature susceptibility of the asphalt is
C. the higher PI, the greater the temperature susceptibility of the asphalt is
D. PI expresses the temperature susceptibility of asphalt during the mixting process
Which choice about the effect of asphaltene on asphalt is correct（）
A. Making the asphalt soft
B. Promoting the adhesion between asphalt and aggregate
C. Improving the high temperature stability of asphalt
D. Increasing the plasticity of asphalt
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