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随着国家对绿色环保要求越来越高,抓得越来越严;进入预拌混凝土行业的企业必须考虑环保能否达标,其中之一应为使用的外加剂须达到环保要求。一方混凝土所用外加剂虽然不多,但供应商用槽车运到搅拌站的储存罐内,滴、漏、淌是常见的问题。尤其是第二代的萘系中的蒽油和冼油颜色深、粘度大、味臭,不仅污染环境,且对人体有一定的危害。应由第三代的聚羧酸外加剂取而代之。目前,我国的聚羧酸虽发展起步晚,但无论产量或质量上都有了很大的提高,而且在全国各省市的使用量有了很大突破和普及。但提请业内人士注意以下几方面:(1)依据GB8076—2008《混凝土外加剂》引言中所述:减水剂按其减水率大小,可分为普通减水剂、高效减水
As the state demands higher and higher environmental protection, more and more strict grasping; enter the ready-mixed concrete industry enterprises must consider whether the compliance of environmental protection, one of the additives should be used to meet the environmental requirements. Although there are not many admixtures for concrete used on one side, it is common for suppliers to transport tank trucks to the storage tank of the mixing plant. Drops, leaks and drips are common problems. In particular, the second generation of naphthalene anthracene oil and Xian oil deep color, viscosity, odor, not only pollute the environment, and the human body has some hazards. Should be replaced by the third generation of polycarboxylic acid additives. At present, although the development of polycarboxylic acid in our country started late, it has greatly improved both in output and in quality, and it has made a great breakthrough and popularization in the use of polycarboxylic acid in various provinces and cities nationwide. But to draw the attention of the industry in the following areas: (1) According to GB8076-2008 “concrete admixture” described in the introduction: water reducing agent according to the size of the water reducing rate can be divided into ordinary water reducer,