Study on Compatibility of Polycarboxylates Superplasticizer with Different Kinds of Retarders

Abstract

In order to study the compatibility between polycarboxyIn order to study the compatibility between polycarboxylates superplasticizer (PC) and different kinds of retarders, sodium citrate (SC), sodium gluconate (SG), sodium hexametaphosphate (SH) and sucrose (SU) were compounded with PC respectively in the same proportion. The liquid degree and its loss of cement paste, the setting time of cement, the blending strength and compressive strength of mortar that admixed with different kinds of retarders were measured, and the influence mechanism of the compatibility between different kinds of retarders and PC were analyzed. The experiment results showed that it was benefit to the liquid degree of cement paste after SG or SH or SU was compounded with PC; The setting time of cement could prolonged more by SH or SU; Blending and compressive strength of mortar in different ages were enhanced in large extent after SG were adopted; The strength of mortar was reduced in early age and enhanced in small extent in mid-later age after SU was compounded. Comprehensively considering to the influence of liquid degree, setting time and strength, the compatibility of SG with PC is higher than other kinds of retarders.

Investigation of Compatibility of Fluorine-Acrylic Emulsion and Sulphoaluminate Cement in the Design of Composite Coating: Effects of Sorbitol and Its Mechanism

“…Here, we focus on the modification of cement and expect to find an effective retarder for CSA, [23][24][25] which can match the FA film formation process through the hydration rate control, and has no significant harm to the performance of the polymer. In addition, the effect of the above suitable retarder on the composite coating is investigated by the analysis of cement paste fluidity, rheological property, tensile property, water absorption and microstructures.…”