Concrete admixture material surface modification method: Fid-Bau Portal

Concrete admixture material surface modification method

ZHANG XINJIE

The invention discloses a concrete admixture material surface modification method, which adopts a spraying method to carry out admixture material surface modification, and the concrete admixture material surface modification method specifically comprises the following steps: carrying out ball milling on concrete admixture material powder, and then centrifuging the ball milling liquid to obtain a precipitate; freeze-drying the precipitate, and then spreading the freeze-dried precipitate on a PET (Polyethylene Terephthalate) substrate; dissolving carboxymethyl cellulose, chitosan and PVP (Polyvinyl Pyrrolidone) in water, and then heating and stirring to obtain a modified mother solution; and spraying the modified mother solution to the admixture powder, and then heating and drying in vacuum to obtain the modified admixture. According to the method, the dosage of the modified material can be effectively controlled, waste in a traditional method is avoided, in addition, the doped material is firstly subjected to ball milling, the doped material with good adsorbability is obtained, and the modification effect can be enhanced. According to the invention, vacuum drying is introduced, so that the modified material has a stronger adsorption effect on the doping material, is easy to strip from the PET substrate, and can be better adhered under the driving of vacuum, thereby improving the utilization rate of the doping material.

本发明公开了一种混凝土掺加料表面改性方法，采用喷涂的方法进行掺加料的表面改性，具体方法如下：将混凝土掺加料粉末球磨，然后将球磨液离心，得到沉淀；将沉淀进行冻干，然后平铺于PET基板上；将羧甲基纤维素，壳聚糖，PVP溶于水中，然后加热搅拌，得到改性母液；将改性母液喷涂至掺加料粉末，然后在真空中加热烘干，得到改性后的掺加料。本发明可以有效控制改性料的用量，避免传统方法中的浪费，此外由于先对掺加料进行球磨，得到吸附性较好的掺加料，可以增强改性效果。本发明中引入了真空干燥，使改性料对掺加料的吸附作用更强，易于从PET基板剥离，同时在真空的驱动下可以更好黏附，从而提高掺加料的利用率。

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