砖渣基储能颗粒对石膏基自流平砂浆力学-热性能的影响

doi:10.16552/j.cnki.issn1001-1625.2025.0702

摘要/Abstract

摘要：

为推动固废资源化与建筑节能产业的协同发展。本研究利用石蜡与砖渣（BS）制备复合储能颗粒（ESPs），并部分替代砂子掺入石膏基自流平砂浆，制备了新型石膏基自流平相变储能砂浆（NGSESM），通过质量变化法、XRD、FT-IR、SEM、DSC及力学与热性能测试等方法，研究了BS的吸附率与ESPs的泄漏率，以及NGSESM的微观结构、热性能和力学特性。结果表明，不同的吸附条件和BS粒径会影响BS的吸附率和ESPs的泄漏率。掺入ESPs显著影响了相邻区域中石膏晶体的形貌，降低了NGSESM的力学性能。当ESPs替代75%（质量分数）的砂子时，NGSESM的力学性能和流动度满足《石膏基自流平砂浆》（JC/T 1023—2021）中的要求。此外，NGSESM在加热和冷却过程中的相变温度分别为17.2~27.3 ℃和14.9~22.4 ℃，潜热值分别为4.1和4.3 J/g。本研究为固废基建筑节能材料的应用提供了关键技术支撑。

关键词: 砖渣, 石蜡, 脱硫石膏, 石膏基自流平砂浆, 相变材料, 固废利用

Abstract:

To promote the integrated development of solid waste resource utilization and building energy efficiency industry. This study prepared composite energy storage particles （ESPs） using paraffin wax and brick slag （BS）， and partially replaced sand with gypsum-based self-leveling mortar to prepare a new type of gypsum-based self-leveling phase change energy storage mortar （NGSESM）. The adsorption rate of BS and leakage rate of ESPs， as well as the microstructure， thermal properties， and mechanical properties of NGSESM were studied using mass change method， XRD， FT-IR， SEM， DSC， mechanical and thermal performance testing methods. Results show that various the adsorption conditions and particle size of BS affects the adsorption rate of BS and leakage rate of ESPs. The incorporation of ESPs significantly affects the morphology of gypsum crystals of adjacent regions， and deteriorates the mechanical properties of NGSESM. When ESPs substitute 75% （mass fraction） of sand， the mechanical properties and fluidity of NGSESM can meet the requirements of “Gypsum based self-leveling compound for floor” （JC/T 1023—2021）. In addition， the phase transition temperatures of NGSESM during heating and cooling processes are 17.2~27.3 ℃ and 14.9~22.4 ℃， with latent heating values of 4.1 and 4.3 J/g. This study provides key technical support for the application of energy-saving materials in solid waste based buildings.

Key words: brick slag, paraffin wax, flue gas desulphurized gypsum, gypsum-based self-leveling mortar, phase change material, solid waste utilization

中图分类号:

TU526

王庆佩, 李辉, 郑伍魁, 袁文滨, 常宁, 周州. 砖渣基储能颗粒对石膏基自流平砂浆力学-热性能的影响[J]. 硅酸盐通报, 2026, 45(1): 212-226.

WANG Qingpei, LI Hui, ZHENG Wukui, YUAN Wenbin, CHANG Ning, ZHOU Zhou. Mechanical and Thermal Properties of Gypsum-Based Self-Leveling Mortar Incorporated with Brick Slag-Based Energy Storage Particles[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2026, 45(1): 212-226.

图/表 20

图1 BS的SEM照片

Fig.1 SEM image of BS

图2 半水石膏的粒径分布

Fig.2 Particle size distribution of HG

表1 半水石膏的主要化学成分

Table 1 Main chemical composition of HG

Composition	SO₃	CaO	Al₂O₃	Fe₂O₃	MgO	SiO₂	Other
Mass fraction/%	57.64	39.78	0.09	0.05	0.55	0.27	1.62

图3 废黏土砖制备BS的过程

Fig.3 Process of BS preparing from waste clay bricks

图4 ESPs制备工艺示意图

Fig.4 Schematic diagram of preparing ESPs

表2 NGSESM的配合比设计

Table 2 Mix proportion design of NGSESM

Sample	Substitution rate of ESPs （mass fraction）/%	Mass/g
Sample	Substitution rate of ESPs （mass fraction）/%	ESPs	Sand	HG	WR	HPMC	SC	Water
1	0	0	200	800	2.5	1.0	1.0	480
2	25	50	150	800	2.5	1.0	1.0	480
3	50	100	100	800	2.5	1.0	1.0	480
4	75	150	50	800	2.5	1.0	1.0	480
5	100	200	0	800	2.5	1.0	1.0	480

图5 高压、常压和负压条件下清洗前后BS的吸附率和ESPs的泄漏率

Fig.5 Adsorption rate of BS and leakage rate of ESPs before and after cleaning under HP， SA， and NP conditions

图6 不同负压条件下BS的吸附率和ESPs泄漏率

Fig.6 Adsorption rate of BS and leakage rate of ESPs under different NP conditions

图7 BS粒径对BS吸附率、ESPs泄漏率的影响及BS孔隙结构演变的示意图

Fig.7 Influence of BS particle size on adsorption rate of BS， leakage rate of ESPs， and schematic diagram of evolution mechanism of BS pore structure

图8 不同ESPs替代率下NGSESM的流动度

Fig.8 Fluidity of NGSESM with different substitution rates of ESPs

图9 砂子和BS的颗粒形态

Fig.9 Particle morphology of sand and BS

图10 不同ESPs替代率下NGSESM的力学性能

Fig.10 Mechanical properties of NGSESM with different substitution rates of ESPs

图11 NGSESM力学性能测试时的受力分布示意图

Fig.11 Schematic diagrams of force distribution during mechanical properties tests for NGSESM

图12 不同ESPs替代率下NGSESM的导热系数

Fig.12 Thermal conductivity of NGSESM with different substitution rates of ESPs

图13 NGSESM及其组成材料的XRD谱

Fig.13 XRD patterns of NGSESM and its constituent materials

图14 NGSESM及其组成材料的FT-IR谱

Fig.14 FT-IR spectra of NGSESM and its constituent materials

图15 BS吸附PW前后的微观结构形貌

Fig.15 Microstructure before and after BS adsorb PW

图16 未添加ESPs和添加75% ESPs的NGSESM的微观结构形貌

Fig.16 Microstructure of NGSESM without ESPs and with 75% ESPs

图17 普通石膏基自流平砂浆和NGSESM的热性能

Fig.17 Thermal properties of ordinary gypsum-based self-leveling mortar and NGSESM

图18 PW储能/释放能量示意图

Fig.18 Schematic diagram of storage-release

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