US 11,673,833 B2
Strontium ferrite-based sacrificial mortar and its preparation method
Hongyan Chu, Nanjing (CN); Jinyang Jiang, Nanjing (CN); Huan Zhao, Nanjing (CN); Li Gao, Nanjing (CN); Jianjian Qin, Nanjing (CN); Jinhui Tang, Nanjing (CN); Fengjuan Wang, Nanjing (CN); and Kaijian Huang, Nanjing (CN)
Assigned to NANJING FORESTRY UNIVERSITY, Nanjing (CN)
Filed by Nanjing Forestry University, Nanjing (CN)
Filed on Mar. 9, 2021, as Appl. No. 17/196,108.
Claims priority of application No. 202011342409.3 (CN), filed on Nov. 25, 2020.
Prior Publication US 2022/0162121 A1, May 26, 2022
Int. Cl. C04B 14/30 (2006.01); C04B 14/06 (2006.01); C04B 24/26 (2006.01); C04B 28/06 (2006.01); C04B 40/00 (2006.01); C04B 103/32 (2006.01); C04B 111/00 (2006.01)
CPC C04B 14/308 (2013.01) [C04B 14/06 (2013.01); C04B 24/2641 (2013.01); C04B 28/065 (2013.01); C04B 40/0046 (2013.01); C04B 2103/32 (2013.01); C04B 2111/00862 (2013.01)] 3 Claims
 
1. A strontium ferrite-based sacrificial mortar, comprising the following raw materials in parts by weight:
720-1000 parts of sulphoaluminate cement, 100-300 parts of strontium ferrite, 600-650 parts of quartz sand, 400-450 parts of water and 0.01-35 parts of superplasticizer;
wherein the cement is sulphoaluminate cement of grade 42.5, with CaO in a mass content of larger than 40%, and Al2O3 in a mass content of greater than 20%;
the quartz sand is a high-quality quartz powder, with SiO2 mass content greater than or equal to 99%, and a particle size distribution of 0.075 mm-4.75 mm;
the superplasticizer is polycarboxylic acid superplasticizer, with a colorless to light yellow appearance, a density of 1.05-1.15 g/mL, a solid content greater than or equal to 40% (mass content), a gas content of 6%-8% (volume content), a pH of 6-8, and a water reducing rate greater than or equal to 33%;
a preparation method comprising the steps as follows:
(1) mixing sulphoaluminate cement of 42.5 grade, strontium ferrite powder and quartz sand to obtain a mixed material M1 after uniformly dry mixing; and
(2) adding a mixed solution of water and superplasticizer into the uniformly mixed material M1, and stirring to obtain a uniformly mixed material M2, then obtaining the strontium ferrite-based sacrificial mortar;
in step (1), the raw materials for mixing are added into a single-shaft horizontal forced concrete mixer, with a mixing speed of 40-50 revolutions/min, a mixing duration of 200-240 seconds; and in step (2), ½ of the water is firstly mixed with all the superplasticizer to develop a uniformly mixed solution by uniformly mixing, and adding the uniformly mixed solution into the mixed material M1, then a remaining water is used to wash a container holding the superplasticizer, and the remaining water used for washing is added into the mixed material M1, followed by mixing for a duration of 200-240 seconds.