Magnesium phosphate cement repair mortar and preparation method thereof

Abstract

The invention relates to magnesium phosphate cement repair mortar and a preparation method thereof. The magnesium phosphate cement repair mortar is prepared from the following components in parts by weight: 20-35 parts of potassium dihydrogen phosphate, 60-75 parts of magnesium oxide, 10-20 parts of fly ash, 10-15 parts of fine sand, 12-30 parts of water, 1-4 parts of zinc gluconate, 1-3 parts ofcopper gluconate, 1-2 parts of a retarder, 5-10 parts of recycled concrete, 4-8 parts of diatomite and 3-6 parts of metal ceramic micropowder. The preparation method for the magnesium phosphate cementrepair mortar specifically comprises the following steps: S1, proportioning the above components in parts by weight; S2, stirring potassium dihydrogen phosphate, magnesium oxide, fly ash and fine sand at a low speed; S3, adding water and the retarder into a base material, continuing to stir, sequentially adding the recycled concrete waste, zinc gluconate, copper gluconate, diatomite and metal ceramic micropowder, and performing stirring to prepare slurry; and S4, subjecting the slurry to pouring, vibrating and curing treatment for forming of the slurry. The method of the invention has the effect of delaying the setting time of the magnesium phosphate cement repair mortar.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a magnesium phosphate cement repair mortar and a preparation method thereof. Background technique [0002] At present, the world's cement industry is mainly dominated by Portland cement, and the development and application of Portland cement is the most mature. Portland cement occupies a dominant position in large-scale engineering projects such as civil engineering and water conservancy. Yes, the production process is mature. In addition to the Portland cement system, there are aluminate cement and phosphate cement, among which magnesium phosphate cement is unique in the field of rapid repair due to its early strength and rapid hardening characteristics. [0003] The raw materials of magnesium phosphate cement mainly include phosphate, magnesium oxide and admixtures. The preparation principle is: MgO is dissolved in phosphate acidic solution, and ionized to produce M...

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned prior art scheme has the following defects: the above-mentioned scheme combines the CaO in the silicon-containing component and the calcined product by calcining the dolomite powder and the silicon-containing component to form C 2 S, calcium magnesium feldspar and diopside and other minerals can reduce the activity of CaO in dolomite, thereby delaying the setting time of magnesium phosphate cement. However, calcination increases the production cost, and calcination itself is time-consuming

Images