水泥胶砂强度检验方法培训试题

水泥胶砂强度检验方法 培训 焊锡培训资料ppt免费下载焊接培训教程 ppt 下载特设培训下载班长管理培训下载培训时间表下载 试 题 快递公司问题件快递公司问题件货款处理关于圆的周长面积重点题型关于解方程组的题及答案关于南海问题 一、 选择题(每题5分，共50分) 1.混凝土强度试件尺寸是由( C )确定的。 A 砼强度等级 B 施工难易程度 C 石子最大粒径 D 构造部位 2(混凝土强度等级是由( D )划分的。 A立方体抗压强度 B立方体抗压强度平均值 C轴心抗压强度 D立方体抗压强度 标准 excel标准偏差excel标准偏差函数exl标准差函数国标检验抽样标准表免费下载红头文件格式标准下载 值 3(我国现行水泥胶砂强度检验方法采用( D )标准。 A 、BS B 、GB C 、ASTM D、ISO 4(混凝土立方体抗压强度标准值是指用标准方法制作混凝土标准试件，标准养护28 所测得的且强度保证率大于( C )的立方体抗压强度平均值。 A 、75% B 、85% C 、95% D、 100% 5(混凝土强度随水灰比增大而( C )。 A 增大 B 不变 C 减小 D 不能确定 6(保证混凝土的耐久性，应控制( E )。 A 最大水灰比 B 最小水泥用量 C 最小水灰比 D 最大水泥用量 E 最大水灰比、最小水泥用量 F 最小水灰比、最大水泥用量 7(当环境的相对湿度为( D )时，混凝土碳化停止。 A 25%~50% B 50%~75% C75%~100% D小于25%或大于100% 8(木钙掺量0.25%，“0.25%”指以( B )为基准量计算的。 A 用水量 B 水泥用量 C 混凝土用量 D 砂率 9(在使用冷拉钢筋的混凝土结构及预应力混凝土结构，不允许掺用( A )。 A 氯盐早强剂 B 硫酸盐早强剂 C 有机胺类早强剂 D 有机,无机化合物类早强剂 10(在高湿度空气环境中、水位升降部位、露天或经受水淋的结构，不允许掺用( )。 adership: Luo Mingjun, rectification time: before September 25th, insist for a long time) 1, 2, to further improve research, solve thoroughly, not solid, the effect is not obvious. The major issues and enterprises it is a matter of security bureau year development, the vital interests of the problem, determine the research topic, by members of the Party led research. Basic research to see the truth, to the truth, do not say hello, not pre arranged. After the investigation to submit the research report. 3, insist on grassroots party members take the lead in implementing the line. <. In the construction of work style building long-term mechanism views > and < on the depth of the grassroots, the people, promoting harmony activities notice >, more mines and enterprises, solve the masses of grassroots leaders, mine is not enough. 4, contact a crowd. Combined with the "grassroots cadres contact farmers" activities and each cadres to contact a people, by A 氯盐早强剂 B 硫酸盐早强剂 C 三乙醇胺复合早强剂 D 三异丙醇胺早强剂 二、 简答题。(共50分) 1、简述胶砂抗折强度测定方法。(12分) 答:将试体一个侧面放在试验机(见4.2.6)支撑圆柱上，试体长轴垂直于支撑圆柱，通过加荷圆柱以 50N/s?10N/s的速率均匀地将荷载垂直地加在棱柱体相对侧面上，直至折断。 保持两个半截棱柱体处于潮湿状态直至抗压试验。 抗折强度Rf以牛顿每平方毫米(Mpa) 表 关于同志近三年现实表现材料材料类招标技术评分表图表与交易pdf视力表打印pdf用图表说话 pdf 示，按式(1)进行计算: 1.5FfL Rf,——————— „„„„„„„„„„„„„„„„„„(1) b3 式中:Ff--折断时施加于棱柱体中部的荷载，N; L--支撑圆柱之间的距离，mm; b--棱柱体正方形截面的边长，mm。 2、简述胶砂抗压强度测定方法。(12分) 答:抗压强度试验通过4.2.7和4.2.8规定的仪器，在半截棱柱体的侧面上进行。 半截棱柱体中心与压力机压板受压中心差应在?0.5mm内，棱柱体露在压板外的部分约有 10mm。 在整个加荷过程中以2400N/s?200N/s的速率均匀地加荷直至破坏。 抗压强度Rc以牛顿每平方毫米(Mpa)为单位，按式(2)进行计算: Fc Rc,—————— „„„„„„„„„„„„„„„„„„(2) A adership: Luo Mingjun, rectification time: before September 25th, insist for a long time) 1, 2, to further improve research, solve thoroughly, not solid, the effect is not obvious. The major issues and enterprises it is a matter of security bureau year development, the vital interests of the problem, determine the research topic, by members of the Party led research. Basic research to see the truth, to the truth, do not say hello, not pre arranged. After the investigation to submit the research report. 3, insist on grassroots party members take the lead in implementing the line. <. In the construction of work style building long-term mechanism views > and < on the depth of the grassroots, the people, promoting harmony activities notice >, more mines and enterprises, solve the masses of grassroots leaders, mine is not enough. 4, contact a crowd. Combined with the "grassroots cadres contact farmers" activities and each cadres to contact a people, by 式中:Fc--破坏时的最大荷载，N; A--受压部分面积，mm2(40mm×40mm,1600mm2)。 3、试体龄期的时间计算。(12分) 答:试体龄期是从水泥加水搅拌开始试验时算起。不同龄期强度试验在下列时间里进行。 --24 h?15 min; --48 h?30 min; --72 h?45 min; -- 7 d?2 h; -->28 d土8 h。 4、试述当使用代用振石台成型胶砂时的操作 流程 快递问题件怎么处理流程河南自建厂房流程下载关于规范招聘需求审批流程制作流程表下载邮件下载流程设计 。(14分) 答:在搅拌胶砂的同时将试模和下料漏斗卡紧在振动台的中心。将搅拌好的全部胶砂均匀地装入下料漏斗中，开动振动台，胶砂通过漏斗流入试模。振动120s?5s停车。振动完毕，取下试模，用刮平尺以 7.2.1规定的刮平手法刮去其高出试模的胶砂并抹平。接着在试模上作标记或用字条表明试件编号。 adership: Luo Mingjun, rectification time: before September 25th, insist for a long time) 1, 2, to further improve research, solve thoroughly, not solid, the effect is not obvious. The major issues and enterprises it is a matter of security bureau year development, the vital interests of the problem, determine the research topic, by members of the Party led research. Basic research to see the truth, to the truth, do not say hello, not pre arranged. After the investigation to submit the research report. 3, insist on grassroots party members take the lead in implementing the line. <. In the construction of work style building long-term mechanism views > and < on the depth of the grassroots, the people, promoting harmony activities notice >, more mines and enterprises, solve the masses of grassroots leaders, mine is not enough. 4, contact a crowd. Combined with the "grassroots cadres contact farmers" activities and each cadres to contact a people, by