硫酸铝对高掺量流化床粉煤灰基泡沫混凝土性能的影响

doi:10.11896/cldb.23090133

Abstract
Figure/Table
References
Related Citation (15)

Download:

Full Text ( PDF ) (5196KB)
Export: BibTeX | EndNote (RIS)

Abstract With the development of the new circulating fluidized bed coal-burning technology, the emission of the circulating fluidized bed fly ash (CFBFA) is increasing. In this work, combined with the high demand of thermal insulation materials in northern China, high dosage CFBFA was used to prepare foam concrete with thermal insulation performance. To tackle the challenges of long setting time and low early strength in foam concrete, aluminum sulfate was introduced. The influence of aluminum sulfate mixture on the density, strength and thermal conductivity of foam concrete was studied. The hydration products and micromorphology of CFBFA-based foam concrete were analyzed by X-ray diffraction (XRD), thermal weight (TG) and scanning electron microscopy (SEM). Moreover, the pore structure of foamed concrete was tested by 3D contourometer. The results showed that aluminum sulfate promoted the early formation of ettringite in the system. Compared with the reference group (0% aluminum sulfate addition), the initial setting time of foam concrete with 15% aluminum sulfate addition was reduced by 470 minutes. The foam concrete with 10% aluminum sulfate addition achieved a 3-day compressive strength of 10.43 MPa and a thermal conductivity of 0.31 W·m^-1·K^-1, showing its potential for efficient large-scale production.

Key words： foam concrete circulating fluidized bed fly ash (CFBFA) heat insulation alkali-free liquid accelerator pore structure

Published: 25 October 2024 Online: 2024-11-05

CLC number:

TU526

Fund:National Natural Science Foundation of China (52108228,51925805).

	Service
	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	DONG Biqin
	ZHANG Xiao
	LIU Yuantao
	HE Xiaowei
	WANG Yanshuai

Cite this article:

DONG Biqin,ZHANG Xiao,LIU Yuantao, et al. Influence of Aluminum Sulfate on the Performance of High-content Circulating Fluidized Bed Fly Ash-based Foam Concrete[J]. Materials Reports, 2024, 38(20): 23090133-8.

URL:

http://www.mater-rep.com/EN/10.11896/cldb.23090133 OR http://www.mater-rep.com/EN/Y2024/V38/I20/23090133

1 Wu Y H, Edward J, Jia L F. Fuel, 2004, 83, 1357.
2 Zhu S J, Lyu Q G, Zhu J G. Journal of the Energy Institute, 2019, 92, 1388.
3 Yan S, Liu Q W, Shao Y J, et al. Fuel, 2020, 269, 117424.
4 Chen X M, Gao J M, Yan Y, et al. Construction and Building Materials, 2017, 157, 1154.
5 Du S X, Li X J, Yuan J, et al. Environmental Protection Science, 2022, 48(1), 21 (in Chinese).
杜世勋, 李晓姣, 袁进, 等. 环境保护科学, 2022, 48(1), 21.
6 Lin H Y, Lin W, Yang Y F. Advanced Materials Research, 2012, 512, 1548.
7 Li S C, Chi J Z. Light Metals, 2022(7), 12 (in Chinese).
李世春, 池君洲. 轻金属, 2022(7), 12.
8 Zhao J H, Wang D M, Liao S C. Construction and Building Materials, 2015, 101, 851.
9 Zhang W Y, Wang S, Duan X H, et al. Construction and Building Materials, 2023, 369, 130394.
10 Nghia P T, Tuan N N, Tuan D N, et al. Journal of Cleaner Production, 2022, 375, 133939.
11 Lina Chica, Albert Alzate. Construction and Building Materials, 2019, 200, 637.
12 Chen X M, Yan Y, Liu Y Z, et al. Construction and Building Materials, 2014, 54, 137.
13 Lee Sangpil, Kim Donghyun, Ryu Jonghyun, et al. Tunnelling and Underground Space Technology, 2006, 21, 431.
14 Sathya N J, Ramamurthy K. Construction and Building Materials, 2012, 37, 144.
15 Niu M D, Li G X, Zhang J B, et al. Construction and Building Materials, 2020, 253, 119246.
16 Jiang J, Lu Z Y, Niu Y H, et al. Materials & Design, 2016, 92, 949.
17 Fan L L, Yang Y, Zhu B R, et al. New Building Materials, 2012, 39(7), 46 (in Chinese).
范丽龙, 杨杨, 朱伯荣, 等. 新型建筑材料, 2012, 39(7), 46.
18 Gabrisová A, Havlica J, Sahu S. Cement and Concrete Research, 1991, 21(6), 1023.
19 Kishar E A. Cement and Concrete Research, 2005, 35(8), 1638.
20 Zhang J S. Study on the regulation of ettringite morphology andits mechanism. Master’s Thesis, China General Research Institute of Building Materials Science, China, 2018 (in Chinese).
张金山. 钙矾石形貌调控及其机理研究. 硕士学位论文, 中国建筑材料科学研究总院, 2018.
21 Albayrak M, Yörükoğlu A, Karahan S, et al. Building and Environment, 2007, 42, 3161.
22 Xiao M, Li F X, Yang P F, et al. Journal of Building Engineering, 2023, 71, 106500.