题目内容

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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Compared with ordinary Portland cement, which choice in the following is right as to the composition of Portland cement for road（）

A. It has more C3A and less C4AF
B. It has more C3S and less C3A
C. It has less C3A and more C3S
D. It has less C3A and more C4AF

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An aggregate’s voids are filled with moisture but the main surface area of the aggregate particles is dry. Which of the following moisture condition does it belong to（）

A. Bone dry
B. Air dry
C. Saturated surface–dry （SSD）
D. Moist

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After some water reducing agent is used into concrete, the function of the agent is（）if some water is reduced

A. to improve concrete mechanics
B. to reduce concrete cost
C. to change concrete workability
D. to increase concrete flowability

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Which one in the following options might be disadvantage to the initial strength of cement concrete（）

A. use blast furnace slag cement
B. gap gradation is used for the cement concrete
C. the cement particle is too fine
D. water reducer is added in the cement concrete

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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

Compared with ordinary Portland cement, which choice in the following is right as to the composition of Portland cement for road（）

An aggregate’s voids are filled with moisture but the main surface area of the aggregate particles is dry. Which of the following moisture condition does it belong to（）

After some water reducing agent is used into concrete, the function of the agent is（）if some water is reduced

Which one in the following options might be disadvantage to the initial strength of cement concrete（）

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