Nowadays, rutile TiO2 or anatase TiO2 is prepared from titanium oxalate, but there are only few studies on the rutile/anatase TiO2 mixed crystal.

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In this paper, polycarboxylate superplasticizers were synthesized by free radical solution polymerization under different synthesis temperature conditions. The bleeding performance of polycarboxylate superplasticizers under different synthesis temperature conditions was discussed by paste test and concrete test, and the structure of polycarboxylate superplasticizers was characterized by infrared spectroscopy (FTIR) and gel permeation chromatography (GPC). The results show that the bleeding and slump retention performance of polycarboxylate superplasticizer can be effectively improved by properly increasing the synthesis temperature, and the better synthesis temperature was 55 °C. With the temperature increase, the molecular weight of polycarboxylate superplasticizers increases first and then decreases. The infrared spectra of polycarboxylate superplasticizers synthesized at different temperatures were not significantly different.

Due to the shortage of high-quality natural sand, the development of the polycarboxylic acid water reducer with excellent clay resistance has become a research hotspot in recent years. Using acrylic acid, methyl 4-vinylbenzoate, ethylene glycol monovinyl polyethylene glycol ether with a molecular weight of 3000 (EPEG-3000) as comonomers, under the action of sodium bisulfite formaldehyde-hydrogen peroxide redox initiator system initiating system and chain transfer agent mercaptoethanol, a new clay-resistant polycarboxylic acid water reducer with excellent performance was synthesized, named as KZJ-KN. KZJ-KN has the characteristics of high monomer conversion, small adsorption capacity on clay and excellent anti-sludge performance.