US 11,981,604 B2
Concrete crack repair material based on nano materials and its preparation method
Chonggen Pan, Ningbo (CN); Yu Hu, Ningbo (CN); Shiyang Qu, Ningbo (CN); and Jiawei Zang, Ningbo (CN)
Assigned to NingboTech University, Ningbo (CN)
Filed by NingboTech University, Ningbo (CN)
Filed on May 12, 2023, as Appl. No. 18/316,984.
Claims priority of application No. 202210581415.7 (CN), filed on May 26, 2022.
Prior Publication US 2023/0382799 A1, Nov. 30, 2023
Int. Cl. C04B 28/06 (2006.01); C04B 14/04 (2006.01); C04B 14/06 (2006.01); C04B 16/06 (2006.01); C04B 18/08 (2006.01); C04B 18/14 (2006.01); C04B 18/24 (2006.01); C04B 22/14 (2006.01); C04B 24/04 (2006.01); C04B 24/16 (2006.01); C04B 24/28 (2006.01); C04B 40/00 (2006.01); C04B 103/30 (2006.01); C04B 103/32 (2006.01); C04B 103/61 (2006.01); C04B 111/00 (2006.01); C04B 111/72 (2006.01)
CPC C04B 28/065 (2013.01) [C04B 14/045 (2013.01); C04B 14/06 (2013.01); C04B 16/0683 (2013.01); C04B 18/08 (2013.01); C04B 18/146 (2013.01); C04B 18/248 (2013.01); C04B 22/14 (2013.01); C04B 24/04 (2013.01); C04B 24/16 (2013.01); C04B 24/28 (2013.01); C04B 40/0046 (2013.01); C04B 2103/302 (2013.01); C04B 2103/32 (2013.01); C04B 2103/61 (2013.01); C04B 2111/00508 (2013.01); C04B 2111/72 (2013.01)] 4 Claims
 
1. A preparation method of a concrete crack repair material based on nano materials, wherein the concrete crack repair material based on the nano materials comprises raw materials in parts by weight as follows:
seaweed, 5-10 parts;
sulphoaluminate cement, 40-50 parts;
natural sand, 10-15 parts;
nano-silica fume, 20-30 parts;
calcium formate, 5-10 parts;
fly ash, 5-10 parts;
anhydrous calcium sulphoaluminate, 5-8 parts;
a polyester fiber, 1-2 parts;
a water reducing agent, 0.2-0.5 parts;
a corrosion inhibitor, 5-10 parts; and
water, 24-30 parts;
wherein the preparation method of the concrete crack repair material comprises the following steps:
step 1, drying and grinding the seaweed into seaweed powder;
step 2, mixing the seaweed powder, the sulphoaluminate cement, the natural sand, and the fly ash to obtain a first mixture, then adding the water reducing agent, the corrosion inhibitor, and the water into the first mixture to obtain a second mixture, and stirring the second mixture; and
step 3, adding the polyester fiber, the nano-silica fume, the calcium formate, and the anhydrous calcium sulphoaluminate into the second mixture and stirring evenly to obtain the concrete crack repair material based on the nano materials;
wherein a particle size of the nano-silica fume is in a range of 30 nm to 80 nm, and purity of the nano-silica fume is 99.9%;
wherein the corrosion inhibitor comprises: polyethyleneimine, sodium silicate, ammonium persulfate, and xylene thiourea;
wherein the seaweed is waste seaweed;
wherein the water reducing agent is a naphthalene superplasticizer in which a content of Na2SO4 is less than 3%;
wherein a mass ratio of the polyethyleneimine:the sodium silicate:the ammonium persulfate:the xylene thiourea is (2-5):(5-8):(3-5):(1-2); and
wherein the waste seaweed is crushed to 80-100 meshes.