US 12,227,460 B1
Low carbon ultra-high performance engineered geopolymer composite and its preparation method and application
Jiaxiang Lin, Guangzhou (CN); Gai Chen, Guangzhou (CN); Huaming Lai, Guangzhou (CN); Yongchang Guo, Guangzhou (CN); Hongshu Pan, Guangzhou (CN); and Ruihao Luo, Guangzhou (CN)
Assigned to GUANGDONG UNIVERSITY OF TECHNOLOGY, Guangzhou (CN)
Filed by GUANGDONG UNIVERSITY OF TECHNOLOGY, Guangzhou (CN)
Filed on May 31, 2024, as Appl. No. 18/679,494.
Claims priority of application No. 202310982064.5 (CN), filed on Aug. 7, 2023.
Int. Cl. C04B 28/26 (2006.01); C04B 14/06 (2006.01); C04B 14/28 (2006.01); C04B 16/06 (2006.01); C04B 18/08 (2006.01); C04B 18/14 (2006.01); C04B 22/06 (2006.01); C04B 22/10 (2006.01); C04B 22/12 (2006.01); C04B 40/00 (2006.01); C04B 103/10 (2006.01); C04B 103/30 (2006.01); C04B 103/50 (2006.01)
CPC C04B 28/26 (2013.01) [C04B 14/06 (2013.01); C04B 14/28 (2013.01); C04B 16/0625 (2013.01); C04B 18/08 (2013.01); C04B 18/141 (2013.01); C04B 18/146 (2013.01); C04B 22/062 (2013.01); C04B 22/10 (2013.01); C04B 22/124 (2013.01); C04B 40/0046 (2013.01); C04B 2103/10 (2013.01); C04B 2103/302 (2013.01); C04B 2103/50 (2013.01); C04B 2201/50 (2013.01)] 4 Claims
 
1. A preparation method for an ultra-high performance engineered geopolymer composite, wherein the composite comprises the following parts by weight of raw materials:
cementitious material powder 1163 parts, fine aggregate 407.1 parts, admixture 18.6 parts, nano calcium carbonate 23.3 parts, reinforcing fiber 19.4 parts, activator 475.9-932.2 parts, and water 49.7-81.6 parts;
the cementitious material powder comprises the following parts by weight of raw material: slag 821.1 parts, fly ash 248.9 parts, and silica fume 93.0 parts;
the admixture comprises the following parts by weight of raw materials: barium chloride 11.6 parts, defoaming agent 1.2 parts, and water reducer 5.8 parts;
the fine aggregate is quartz sand;
the activator used is a NaOH—Na2SiO3 activator as a basic activator, and Na2CO3 is used as a supplementary activator to form a composite activator, wherein, a mass ratio of NaOH solution, Na2SiO3 solution, and Na2CO3 solution is (74.6:111.5):(0-119.1):(278.7-433.5); the reinforcing fiber is an ultra-high molecular weight polyethylene (PE) fiber;
and the method comprises the following steps:
(1) after mixing uniformly the cementitious material powder, barium chloride, and defoaming agent, adding successively quartz sand, activator, water reducer, nano calcium carbonate and PE fiber and stirring uniformly to obtain a slurry;
(2) pouring and forming the obtained slurry and maintaining, then obtaining an ultra-high performance engineered geopolymer composite;
step (1) comprises the following steps:
adding the cementitious material powder, barium chloride, and defoaming agent to a stirrer, and dry mixing at a stirrer rate of 75 r/min for 3 min, then adding the quartz sand to the stirrer and dry mixing at a low speed of 75 r/min for 3 min, then mixing the activator with water and adding to the stirrer to stir at a low speed of 75 r/min for 1 min, then stopping the stirrer and adding the water reducer and nano calcium carbonate to continue to stir at a stirring rate of 165 r/min for 2 min, then replacing with a low speed of 75 r/min and adding all PE fibers within 3 min, finally, dispersing uniformly the fibers under stirring at a low speed of 75 r/min for 2 min.