问题 问答题 简答题

水泥的验收包括哪几个方面?过期受潮的水泥如何处理?

答案

参考答案:水泥的验收包括:(1)外观与数量验收;(2)质量验收

根据水泥受潮程度不同可选用不同的处理方法:

(1)水泥有集合成小粒的状况,但用手捏又成粉末,并无捏不散的粒快;这说明水泥已开始受潮,但情况不严重,强度损失不大,约损失一个等级。

处理:用各种办法将水泥压成粉末(或增加搅拌时间)重新测定水泥强度;若不进行水泥强度检验,只能用于强度要求比原来小15~20%的部位。

(2)水泥已部分结成硬,或外部结成硬快,内部尚有粉末,这表明水泥受潮已相当严重,强度损失已达一半以上。

处理:用筛子筛除硬块,对可压碎成粉的则想法压碎;重新测定水泥的强度;若不测定水泥的强度,只能用于受力很小的部位。一般只能用于墙面抹灰等耐磨要求低的地方。

(3)水泥结成大的硬块,看不出有粉末状,这表明水泥已完全受潮,强度已完全损失,水泥不具有活性,成了废品。

单项选择题 A1型题
阅读理解

阅读理解。

     Barefoot Traveler is a tour agent that specializes in diving holidays, tailor-made to your own needs. The

most popular destinations include Bonaire, Tobago, the Bahamas, Maldives,Oman, Seychelles and Thailand.

     Our friendly and knowledgeable staff, who are qualified divers (潜水员) themselves, will be able to advise

you on the best destinations for your requirements.

     Whether you want to learn to dive, further your diving qualifications, continue to discover the underwater

world, or simply relax on the beach, we are here' to help organize your holiday.

     We are happy to satisfy single travelers and offer special discounts (折扣).

     Group discounts are offered to groups of eight or more travelers and tailor-made packages are available for

Dive Clubs.

     We also offer a series of diving live aboard choices throughout the Caribbean. Indian Ocean and South East

Asia. Live aboards are very popular scuba (呼吸器) diving holidays for those who want to access the best

diving sites.

     Our barefoot luxury holiday brand is for those trying something a little more special, whether it's your

honeymoon, anniversary or simply for more discerning (有品位的) travelers. We have a selection of 4 and 5

star levels which are the best in luxury holidays.

1. What's the author's purpose in writing this passage?

A. To give some advice on diving.

B. To introduce the popular destinations.

C. To teach diving skills.

D. To attract tourists.

2. Which of the following is TRUE according to the passage?

A. It's impossible to be offered tailor-made packages when you join Dive Clubs.

B. Au staff are qualified divers with wide knowledge on the best diving.

C. Barefoot Traveler specializes in simple holidays.

D. Travelers can enjoy Winter Sun.

3. According to the passage, Barefoot Traveler _____.

A.is not a tour agent

B. has over 25 scuba diving liveaboard beats

C. makes the luxury holiday based on consumers' needs and desires

D. makes the luxury holiday you don't have in mind

4. The best title for this passage would be _____.

A. Welcome to Barefoot Traveler

B. A Wonderful Experience

C. Scuba Diving

D. How to Choose Destinations