【摘 要】
：
Robustness of materials in concrete has always been one of the, if not the main driving force in the utilization of chemical admixtures.Among which, dispersing agents such as plasticizers are often th
【机 构】
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Borregaard Ligno Tech AS, Sarpsborg 1701, Norway
【出 处】
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The 14th International Congress on the Chemistry of Cement (
论文部分内容阅读
Robustness of materials in concrete has always been one of the, if not the main driving force in the utilization of chemical admixtures.Among which, dispersing agents such as plasticizers are often the common targets for their low robustness due to their high incompatibility challenges towards e.g.sulphate contents, clay contaminants, etc.The current plasticizer market show high performance with PCEs (polycarboxylate ether).However, these polymers often lack in the robustness department.On the other hand, despite the seemingly poorer dosage performance, lignosulfonates are still the main used plasticizers for concrete on a global basis.The most cited reason for this seems to be robustness of a lignosulfonate based plasticizer in any kind of concrete in any climate with any kind of raw material.From this several questions arise: What means robust?How is it defined? What is a robust admixture? Is a lignosulfonate based chemical admixture really as robust as many users have claimed? What is the difference in robustness of such an admixture to that of a PCE based admixture?
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