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教学模块4试题

教学模块4试题
教学模块4试题

教学模块4试题

一、单项选择题

1.无机结合料稳定土基层材料配合比设计,以_____龄期无侧限抗压强度为控制指标。(A)

A.7d B.14d C.28d D.90d

2.无机结合料稳定土无侧限抗压强度试验所需试样采用高径比为_________的圆柱体。(B)

A.1:0.5B.1:1C.1:1.5D.1:2

3.水泥稳定碎石强度试验时,试件需在标准条件下养生,养生期间温度应保持为。(C)

A.20℃B.25℃C.20℃±2℃D.25℃±2℃4.水泥石灰稳定砂砾混合料无侧限抗压强度试验,试件正确的养生方法应是_________。(D)

A.先浸水1d,再标准养生27d B.先标准养生27d,再浸水1d

C.先浸水1d,再标准养生6d D.先标准养生6d,再浸水1d

5.在一次击实试验中,其含水量为4.5%,试样湿密度为2.70g/cm3,则它的干密度为。(C)

A、2.13g/cm3

B、2.15g/cm3

C、2.58g/cm3

D、2.27g/cm3

6.对于无机结合料稳定土而言,下列那句话是正确的。(A)

A、宜采用标号较低的水泥

B、应采用标号较高的水泥

C、应选用液限大于40,塑性指数大于17的土

D、应选用早强水泥

7.在水泥稳定土击实试验中,所用的试样。(A)

A、最大粒径可控制在38mm以内

B、试样不得重复使用

C、含水量了用酒精燃烧法测试

D、可以和水泥一起浸润6~8小时

8.石灰的最主要技术指标。(A)

A、活性氧化钙和活性氧化镁含量

B、氧化钙加氧化镁含量

C、活性氧化钙加氧化镁含量

D、氧化钙加活性氧化镁含量

9.击实试验中,至少应制备的不同含水量试样为。(C)

A.3个 B.4个 C.5个 D.6个

10.基层材料中所用的水泥要求终凝时间宜大于小时。(C)

A、2

B、4

C、6

D、8

11.石灰碳化后的强度增加,是因为形成了物质。(B)

A、Ca(OH)2

B、CaCO3

C、CaO

D、MgO

12.水泥无机结合料与素土烘干时,在上有一定区别。(A)

A、烘箱预热温度

B、烘箱预设温度

C、烘箱加热速度

D、烘箱热效率

13.石灰等级评定时,钙质镁质石灰的分类界限是以的含量评定的。(B)

A、CaO

B、MgO

C、Fe

2O

3

D、CaO+MgO

14.有效氧化钙测定中,酚酞指示剂加入试样溶液中,溶液呈色。(D)

A.黄

B.红

C.玫瑰红

D.粉红

15.石灰消解时要“陈伏”两个星期,其目的是为了。(A)

A)消除过火石灰的危害B)消除欠火石灰的危害C)有利于结晶D)降低发热量

16.消石灰的主要成分是。(D)

A)CaO B)MgO C)Ca(OH)

2D)Ca(OH)

2

和水

17.工地实际采用的水泥剂量应比室内试验确定的剂量增加。(B)

A、0.1%~0.5%

B、0.5%~1.0%

C、1.0%~1.5%

D、1.5%~2.0%

18.石灰稳定土用做高速公路和一级公路的底基层时,颗粒最大粒径不应超过㎜。(C)

A、60

B、53

C、37.5

D、31.5

二、多选题

1.稳定土的无侧限抗压强度试验是按预定干密度用或。(AC)

A.静压法

B.自然沉降

C.锤击法

D.A、B、C三种都不是

2.当基层材料的结合料是粉煤灰时要求加总量大于70%。(BC)

A、CaO

B、SiO

2C、Al

2

O和Fe

2

O

3

D、MgO

三、判断题

1.水泥稳定土用作基层时,应控制水泥剂量不超过6%~7%。(√)

2.石灰未消化残渣含量是石灰的有效成分。(×)

3.石灰稳定类材料可以应用于各级公路的基层或底基层。(×)

4.水泥稳定基层施工中,采用快硬水泥可以加快施工进度。(×)

5.击实试验中,加入水泥的试验拌和后1h内应完成试验,否则试样废弃。(√)

6.生石灰的产浆量越低,则表明其质量越好。(×)

7.高速公路水泥稳定土基层设计抗压强度为(2~3)MPa。(×)

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