US 12,227,453 B2
Cement mortar containing excavated soil prepared by replacing natural sand with engineering soil, and preparation method therefor and application thereof
Bo Wu, Guangdong (CN); and Huixuan Cao, Guangdong (CN)
Assigned to SOUTH CHINA UNIVERSITY OF TECHNOLOGY, Guangzhou (CN)
Appl. No. 17/279,610
Filed by SOUTH CHINA UNIVERSITY OF TECHNOLOGY, Guangdong (CN)
PCT Filed Oct. 31, 2019, PCT No. PCT/CN2019/114528
§ 371(c)(1), (2) Date Mar. 25, 2021,
PCT Pub. No. WO2020/173116, PCT Pub. Date Sep. 3, 2020.
Claims priority of application No. 201910143702.8 (CN), filed on Feb. 25, 2019.
Prior Publication US 2022/0033303 A1, Feb. 3, 2022
Int. Cl. C04B 14/36 (2006.01); C04B 14/06 (2006.01); C04B 28/02 (2006.01); C04B 40/00 (2006.01); C04B 103/30 (2006.01)
CPC C04B 14/361 (2013.01) [C04B 14/06 (2013.01); C04B 28/02 (2013.01); C04B 40/0046 (2013.01); C04B 2103/302 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A preparation method for a cement mortar containing an excavated soil prepared by replacing a natural sand with an engineering soil, wherein the preparation method comprises the following steps:
(1) drying the engineering soil to a constant weight at a temperature of 105±5° C.;
(2) sieving the dried engineering soil into A, B and C groups according to particle sizes;
(3) putting the engineering soil of the C group obtained in the step (2) into a grinder to grind for 2 times to 3 times, with each grinding lasting for 3 seconds to 8 seconds;
(4) sieving the ground engineering soil of the C group to obtain a sieved engineering soil;
(5) mixing the sieved engineering soil obtained in the step (4) with the engineering soil of the B group to form a recycled engineering soil;
(6) mixing the recycled engineering soil obtained in the step (5) with a sieved natural sand, adding into a mortar mixer, stirring to form a sandy soil mixture, and taking out the sandy soil mixture for later use; and
(7) weighing water, cement, the sandy soil mixture and a water-reducing admixture;
evenly dividing the sandy soil mixture and the water-reducing admixture into two parts, adding the water and the cement into the mortar mixer, and stirring to form a cement slurry; then adding one part of the sandy soil mixture and one part of the water-reducing admixture, and stirring; and then adding the other part of the sandy soil mixture and the other part of the water-reducing admixture, and stirring to prepare the cement mortar containing the excavated soil prepared by replacing the natural sand with the engineering soil.