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    如何辨别水泥质量的优劣
    来源:http://www.jndmzp.com   时间:2014-12-11 10:31:14
    观察色泽是否深灰色或深绿色,色泽发黄、发白(发黄说明熟料是生烧料、发白说明矿渣掺量过多)的水泥强度比较低。
    Observe whether dark grey or dark green color, color yellow, white, yellow means clinker is under-burnt clinker, white means excessive dosage of slag) of cement strength is lower. 
    看水泥的纸袋包装是否完好,标识是否完全。纸袋上的标识有:工厂名称,生产许可证编号,水泥名称,注册商标,品种(包括品种代号),标号,包装年、月、日和编号。
    See the paper bags are in good condition of cement, the completeness of the logo. The logo on the paper bag has: factory name, production license number, name of cement, registered trademarks, species (including varieties), label, packaging year, month, date and serial number. 
    用手指捻水泥粉,感到有少许细、砂、粉的感觉,表明水泥细度正常。
    Twist with your fingers cement powder, feel a little thin, sand, powder, cement fineness showed normal. 
    看清水泥的生产日期。超过有效期30天的水泥性能有所下降。储存三个月后的水泥其强度下降10%—20%,六个月后降低15%—30%,一年后降低25%—40%。优质水泥6小时以上能够凝固。超过12小时仍不能凝固的水泥质量不好。
    See the cement production date. Performance of cement decreased more than valid for 30 days. Storage of the cement in the three months after its intensity fell by 10% - 20%, reduced by 15% - 30% after six months, a year later reduced by 25% - 40%. High quality cement more than six hours to set. More than 12 hours, still can't set cement quality is bad. 

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