	US 12,410,099 B1
	Lightweight aggregate-based non-steam-cured high-performance pipe culvert and preparation method thereof
Zhijuan Hu, Jinan (CN); Zesheng Wang, Kunming (CN); Wenlong Wang, Jinan (CN); Jingwei Li, Jinan (CN); Xujiang Wang, Jinan (CN); Shizhao Yang, Jinan (CN); Yujie Li, Kunming (CN); and Xiangkun Zhang, Jinan (CN)
Assigned to SHANDONG UNIVERSITY, Jinan (CN); and KUNMING SHUNHONG NEW MATERIALS CO., LTD, Kunming (CN)
Filed by SHANDONG UNIVERSITY, Jinan (CN); and KUNMING SHUNHONG NEW MATERIALS CO., LTD, Kunming (CN)
Filed on May 8, 2025, as Appl. No. 19/202,064.
Claims priority of application No. 202510274057.9 (CN), filed on Mar. 10, 2025.
Int. Cl. C04B 28/06 (2006.01); B28B 13/02 (2006.01); B28B 21/04 (2006.01); B28B 21/76 (2006.01); C04B 14/36 (2006.01); C04B 18/02 (2006.01); C04B 22/00 (2006.01); C04B 24/26 (2006.01); C04B 40/00 (2006.01); C04B 40/02 (2006.01); C04B 103/20 (2006.01); C04B 103/30 (2006.01); E01F 5/00 (2006.01); E02B 11/00 (2006.01)

CPC C04B 28/065 (2013.01) [B28B 13/02 (2013.01); B28B 21/04 (2013.01); B28B 21/76 (2013.01); C04B 14/365 (2013.01); C04B 18/027 (2013.01); C04B 22/0013 (2013.01); C04B 24/2647 (2013.01); C04B 40/0046 (2013.01); C04B 40/0277 (2013.01); E01F 5/005 (2013.01); E02B 11/005 (2013.01); C04B 2103/20 (2013.01); C04B 2103/302 (2013.01); C04B 2201/20 (2013.01); C04B 2201/50 (2013.01)]

17 Claims

1. A lightweight aggregate-based non-steam-cured pipe culvert, wherein the lightweight aggregate-based non-steam-cured pipe culvert is prepared from a raw material comprising the following components by mass per unit volume:

300-450 kg/m³of a sulfur-aluminum-ferric cementitious material;

800-920 kg/m³of a solid waste-based lightweight aggregate;

300-550 kg/m³of a solid waste-based artificial sand;

0-100 kg/m³of a mineral admixture;

0-50 kg/m³of an auxiliary material; and

110-160 kg/m³of water; and

the raw material further comprises a water reducer and a retarder, the water reducer being added in an amount of 1.5-5 wt % of the sulfur-aluminum-ferric cementitious material, and the retarder being added in an amount of 0.1-0.5 wt % of the sulfur-aluminum-ferric cementitious material;

the solid waste-based lightweight aggregate comprises the following components in percentage by mass: 10-20% of the sulfur-aluminum-ferric cementitious material, 0-90% of phosphogypsum or desulfurized gypsum, and 0-90% of fly ash or gold tailings, and the solid waste-based lightweight aggregate has a particle size of 5-20 mm;

the solid waste-based artificial sand comprises the following components in percentage by mass: 10-20% of the sulfur-aluminum-ferric cementitious material, 0-90% of phosphogypsum or desulfurized gypsum, and 0-90% of fly ash or gold tailings, and the solid waste-based artificial sand has a particle size of 0.15-4.75 mm.