Methods and additives for optimizing the addition of EO / PO superplasticizers for concrete containing smectite clay-containing aggregates

摘要

(57) Abstract It includes the plasticizer like the EO/PO polymer - content plasticizer or the EO/PO comb polymer - content plasticizer, when furthermore, contacting with the water, it expands, in manufacturing the water cement composition which includes the clay like the sumekutaito clay, making the clay denaturalize, plasticizer absorbency of the clay the stage which offers the substance which does the function which is decreased with that. Regarding the typical method of this invention, the plasticizer the EO/PO (for example, oxy alkylene) plasticizer and, is the EO/PO comb polymer desirably, as for the clay active modification substance the organic molecule of the polarity which can be absorbed the inorganic cation and the organic cation, by the clay, the clay dispersant (seeming like poly- phosphate,), or including those blends, there is a possibility of becoming. Including the cation or polarity organic molecule, as the clay active modification substance which becomes, as for that substance desirably, before the water is introduced into clay, it is added to clay. Before the water is introduced into clay, at that time, or after that to add it is possible that substance, the clay dispersant and, of fourth class amine (in cation exchange with the clay vis-a-vis some organic cations affinity which is strong it has,) the way.