24春国开电大春广州市广播电视大学建筑材料(A)形考四建筑材料形考四参考答案_1
来源:渝粤教育 时间:2024-06-10 08:38:18
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形考四_建筑材料形考四0
形考四_建筑材料形考四0
试卷总分:100 得分:60
单选题01.高分子聚合物分为加聚物和缩聚物,下列属于缩聚物的是( ? ? )
聚酯树脂
聚丙烯
聚氯乙烯
聚乙烯
答案:
2.单选题02.决定着塑料性质的成分是( ? ? )
填充料
固化剂渝粤搜题
合成树脂
增塑剂
答案:
3.单选题03.塑料生产的能耗低于传统材料,其范围一般在( ? ? ?)一网一平台答案
617~712 kJ/m 3
457~567 kJ/m 3
316~423kJ/m 3
63~188kJ/m 3
答案:
4.单选题04.生产玻璃钢最主要的原材料是( ? )
钢材和塑料
玻璃和钢材
铝材和塑料
塑料和玻璃纤维
答案:
5.单选题05.涂料生产过程中,起到溶解、分散、乳化成膜物质的原料是( ? ?)
次要成膜物质
溶剂
主要成膜物质
助剂渝粤搜题
答案:
6.单选题06.按强度特性不同,胶粘剂可分为( ? ?)
磷酸盐类胶粘剂、硅溶胶类胶粘剂
有机型胶粘剂、无机型胶粘剂
结构胶粘剂、非结构胶粘剂、次结构胶粘剂
溶剂型胶粘剂、反应型胶粘剂、热熔型胶粘剂
答案:
7.单选题07.石油原油经蒸馏等工艺提炼出各种轻质油及润滑油后的残留物后再进一步加工得到的沥青是( ? )
石油沥青
煤沥青
木沥青
焦油沥青
答案:
8.单选题08.最直接影响沥青的柔软性、抗裂性及施工难度等性能的组分是( ? ?)
油分渝粤题库
水
沥青质
树脂
答案:
9.单选题09.石油沥青塑性是( ? ?)
石油沥青的黏滞性和塑性随温度升降而变化的性能
石油沥青在热、阳光、氧气和潮湿等因素的长期综合作用下抵抗老化的性能
沥青材料内部阻碍其相对流动的一种特性
石油沥青在外力作用下产生变形而不破坏,除去外力后仍保持变形后的形状不变的性质
答案:
10.单选题10.道路石油沥青牌号与黏性和塑性关系说法正确的一项是( ? )
沥青牌号越高,黏性越大,塑性越好
沥青牌号越高,黏性越小,塑性越差
沥青牌号越高,黏性越大,塑性越差
沥青牌号越高,黏性越小,塑性越好
答案:
11.单选题11.下列关于建筑石油沥青的相关叙述有误的一项是( ? ?)
为避免夏季流淌,一般屋面用沥青材料的软化点还应比本地区屋面最高温度高20℃以上
选用石油沥青时要根据地区、工程环境及要求而定
建筑石油沥青主要用作制造油纸,油毡,防水涂料和沥青嵌缝膏
建筑石油沥青的软化点过高夏季易流淌,过低冬季易硬脆甚至开裂
答案:
12.单选题12.石油沥青过于黏稠而需要稀释,一般采用( ? )
水
醋
酒精
石油产品系统的轻质油一网一平台答案
答案:
13.单选题13.下列关于改性沥青相关叙述有误的一项是( ? ?)
矿物填充料改性沥青是在沥青中掺入适量粉状或纤维状矿物填充料经均匀混合而成
用树脂改性石油沥青,可以改进沥青的耐寒性,粘结性和不透气性
虽然橡胶的品种不同,掺入的方法也有所不同,但各种橡胶沥青的性能几乎一样
常用橡胶、树脂和矿物填料等对沥青改性
答案:
14.单选题14.橡胶在阳光、热、空气或机械力的反复作用下,表面会出现变色、变硬、龟裂、发黏,同时机械强度降低,这种现象称为( ?)
爆裂
疲劳破坏
陈伏
老化
答案:国开形成性考核答案
15.单选题15.用量最广,产量最多的合成橡胶是( ? ? )
丁基橡胶
丁苯橡胶
氯丁橡胶
丁腈橡胶
答案:
16.单选题16.防水卷材在高温下不流淌、不起泡、不滑动,低温下不脆裂的性能,称为( ? ? )
大气稳定性
柔韧性
温度稳定性
耐水性
答案:
17.单选题17.当木材吸附水已达到饱和状态而又无自由水存在时的含水率称为( ? ?)
纤维饱和点
强度饱和点
吸水饱和点
涨缩饱和点
答案:渝粤教育
18.单选题18.以植物纤维为原料,经破碎浸泡、热压成型和干燥等工序制成的一种人造板材是指( ? ? )
普通胶合板
纤维板
细木工板
微薄木
答案:
19.单选题19.下列各种装饰材料属于天然建筑材料的是( ? ? )
玻璃
木材
陶瓷
钢铁
答案:
20.单选题20.材料的密度试验所用的仪器设备不包括( ?)
李氏瓶
烘箱
方孔筛
天平
答案:
21.判断题01.有机高分子材料是以有机高分子化合物为主要成分的材料。
答案:
22.判断题02.塑料的热膨胀系数非常小,因此适合用于温差变化较大的场所。
答案:
23.判断题03.建筑涂料具有涂饰作业方法简单,施工效率高,自重小,便于维护更新,造价低等优点。
答案:
24.判断题04.石油沥青的粘滞性大小与组分及温度无关。
答案:
25.判断题05.石油沥青的塑性用针入度表示,针入度越大,塑性越好。
答案:
26.判断题06.闪点是指加热沥青至挥发出的可燃气体和空气的混合物,在规定条件下与火焰接触,初次闪火时的沥青温度。
答案:
27.判断题07.合成高分子防水涂料指以沥青为基料,用合成高分子聚合物进行改性,制成的水乳型或溶剂型防水涂料。
答案:
28.判断题08.树木主要由树皮、髓心和木质部组成,建筑用木材主要是使用木质部。
答案:
29.判断题09.木材在外力作用下会产生塑性变形,当应力不超过持久强度时,变形到一定限度后趋于稳定。
答案:
30.判断题 10 .水泥胶砂抗折强度试验前,不需要擦去试体表面附着的水分和砂粒。
答案:
31.简答题01.选择胶粘剂的基本原则有哪些?
答案:<p class="MsoNormal" align="left"><span lang="EN-US">(1)</span><span style="mso-bidi-font-size:
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</p><p class="MsoNormal" align="left"><span lang="EN-US">(5)</span><span style="mso-bidi-font-size:
10.5pt;font-family:宋体;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri">了解胶粘剂的价格和来源难易。</span><span lang="EN-US"><o:p></o:p></span></p>
32.简答题02.建筑塑料具有哪些优点和缺点?
答案:<p>建筑塑料具有以下优点:(1)质轻、比强度高(2)加工性能好(3)导热系数小(4)装饰性优异(5)具有多功 能性(6)经济性。<br><br>建筑塑料具有以下缺点:(1)耐热性差、易燃(2)易老化(3)热膨胀性大(4)刚度小。<br><br></p>
33.简答题03. 石油沥青的组分有哪些?各组分的性能和作用如何?
答案:<p>石油沥青的组分有油分、树脂、沥青质。油分含量的多少,直接影响沥青的柔软性、抗裂性及施工难度。树脂赋 予沥青具有一定的塑性、可流动性和黏结性,其含量增加,沥青的黏接力和延伸性增加,酸性树脂能改善沥青对矿物 材料的浸润性,特别提高了碳酸盐类岩石的黏附性,增强了沥青的高乳化性。沥青质决定了沥青的黏接力、黏度、湿 度、稳定性和硬度等,沥青质含量增加时,沥青的黏度和黏结力增强,硬度和软化点提高。</p>
国开形成性考核答案
34.简答题04.矿物填充料为何能够改性沥青?
答案:<p>矿物填充料掺入沥青后,能被沥青包裹,形成稳定的混合物,由于沥青对矿物填充料的湿润和吸附作用,沥青可 能被单分子状排列在矿物颗粒表面,形成结合力牢固的沥青薄膜,具有较高的黏性和耐热性,因而提高了沥青的黏结 能力,柔韧性和耐热性,减少了沥青的温度敏感性,并且可以节省沥青。</p>
35.简答题05.简述木材的腐朽原因及防腐方法。
答案:<p>木材腐朽的原因是木材受到真菌侵害后,其细胞改变颜色,结构逐渐变松,变脆,强度和耐久性降低,其次木材 易受百蚁、蜗牛等昆虫的蛀蚀,使木材形成多孔眼或沟道,甚至蛀穴,破坏材质,结构的完整性而使强度降低。<br><br>木材 的防腐方法:(1) 将木材干燥含水率在 20%以下, 保持木结构处于干燥状态, 对于木结构采取通风防潮表面涂刷涂料等 措施(2)将化学防腐剂施加木材,使木材成为有毒物质。<br></p>
36.论述题01.?详细阐述检验混凝土拌合物和易性的试验步骤。
答案:<p>
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</p><p class="MsoNormal" align="left"><span lang="EN-US">(1)</span><span style="mso-bidi-font-size:
10.5pt;font-family:宋体;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri">湿润坍落度筒及底板在坍落度筒内壁和底板上无吸水</span><span lang="EN-US">,</span><span style="mso-bidi-font-size:
10.5pt;font-family:宋体;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri">将各材料称量后</span><span lang="EN-US">,</span><span style="mso-bidi-font-size:
10.5pt;font-family:宋体;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri">在铁板上干拌均匀</span><span lang="EN-US">,</span><span style="mso-bidi-font-size:
10.5pt;font-family:宋体;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri">把筒放在底板</span> <span style="mso-bidi-font-size:10.5pt;
font-family:宋体;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri">中心</span><span lang="EN-US">,</span><span style="mso-bidi-font-size:
10.5pt;font-family:宋体;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri">然后用脚踏住两边脚踏板</span><span lang="EN-US">,</span><span style="mso-bidi-font-size:
10.5pt;font-family:宋体;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri">使坍落度筒在装料时保持位置固定。</span><span lang="EN-US"> (2)</span><span style="mso-bidi-font-size:
10.5pt;font-family:宋体;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri">把按要求取得的混凝土试拌样用小铲分三</span> <span style="mso-bidi-font-size:10.5pt;
font-family:宋体;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri">层</span><span lang="EN-US">,</span><span style="mso-bidi-font-size:
10.5pt;font-family:宋体;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri">均匀地装入筒内</span><span lang="EN-US">,</span><span style="mso-bidi-font-size:
10.5pt;font-family:宋体;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri">每层用捣棒插捣</span><span lang="EN-US"> 25</span><span style="mso-bidi-font-size:
10.5pt;font-family:宋体;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri">次</span><span lang="EN-US">,</span><span style="mso-bidi-font-size:
10.5pt;font-family:宋体;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri">顶层插捣完后</span><span lang="EN-US">,</span><span style="mso-bidi-font-size:
10.5pt;font-family:宋体;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri">刮去多余混凝土</span><span lang="EN-US">,</span><span style="mso-bidi-font-size:
10.5pt;font-family:宋体;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri">并用抹刀抹平。</span><span lang="EN-US"> (3)</span><span style="mso-bidi-font-size:
10.5pt;font-family:宋体;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri">清除筒边底板上</span> <span style="mso-bidi-font-size:10.5pt;
font-family:宋体;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri">的混凝土</span><span lang="EN-US">,</span><span style="mso-bidi-font-size:
10.5pt;font-family:宋体;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri">垂直平稳地提起坍落度筒。测量筒高与坍落后混凝土试体最高点之间高度差</span><span lang="EN-US">,</span><span style="mso-bidi-font-size:
10.5pt;font-family:宋体;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri">即为该混凝土拌合物的坍落</span> <span style="mso-bidi-font-size:10.5pt;
font-family:宋体;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri">度值</span><span lang="EN-US">,</span><span style="mso-bidi-font-size:
10.5pt;font-family:宋体;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri">坍落度筒提高后</span><span lang="EN-US">,</span><span style="mso-bidi-font-size:
10.5pt;font-family:宋体;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri">如混凝土发生坍崩式一边剪坏现象</span><span lang="EN-US">,</span><span style="mso-bidi-font-size:
10.5pt;font-family:宋体;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri">则应更新取样</span><span lang="EN-US">,</span><span style="mso-bidi-font-size:
10.5pt;font-family:宋体;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri">另行测定。</span><span lang="EN-US"> (4)</span><span style="mso-bidi-font-size:
10.5pt;font-family:宋体;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri">观察坍落后混凝土试体</span> <span style="mso-bidi-font-size:10.5pt;
font-family:宋体;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri">的黏聚性和保水性。黏聚性检查用捣棒在已坍落锥体侧面轻松敲打</span><span lang="EN-US">,</span><span style="mso-bidi-font-size:
10.5pt;font-family:宋体;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri">如果锥体下沉</span><span lang="EN-US">,</span><span style="mso-bidi-font-size:
10.5pt;font-family:宋体;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri">则表示黏聚性良好</span><span lang="EN-US">,</span><span style="mso-bidi-font-size:
10.5pt;font-family:宋体;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri">保水性的混</span> <span style="mso-bidi-font-size:10.5pt;
font-family:宋体;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri">凝土拌和物稀浆析出的程度来评定。</span><span lang="EN-US"><o:p></o:p></span></p>