生物质电厂灰渣替代水泥掺合料的性能研究

doi:10.19964/j.issn.1006-4990.2023-0008

Abstract

Abstract:

Under the proposal of “dual carbon” goal，biomass power plant has become an important way for achieving the dual carbon goal.However，the utilization of biomass power plant ash has become a bottleneck preventing the development of biomass power plants.Biomass power plant ash has pozzolanic properties and it is expected to be used as a substitute cement clinker in building materials industries.The physical and chemical properties of biomass power plant ash were analyzed.Based on the physical and chemical properties，10%~30%（mass fraction） biomass power plant ash were used to replace portland cement clinker to prepare cement-based cementitious materials，and the possibility of biomass power plant ash and slag to replace cement clinker was verified.The test results showed that the use of biomass ash as a cementitious material had good prerequisites.The biomass ash could replace 20%（mass fraction） of cement clinker，the hydration heat of the composite cementitious material could be reduced significant，and the strength of the composite material was significantly improved after standard curing for 7 d and 28 d.The utilization of biomass power plant ash as building materials was expected to further help the realization of the “dual-carbon” goal of the power industry.

Key words: biomass ash, inorganic materials, cement admixture, mechanical properties, low carbon

CLC Number:

X705

ZHANG Yanru, REN Changzai, SONG Zhanlong, ZHU Jianjun, ZHAO Baofeng, XIE Hongzhang, WANG Zhenjiang, QI Xiaole. Study on performance of biomass power plant ash as alternative to cement clinker in blended cements[J]. Inorganic Chemicals Industry, 2023, 55(10): 128-135.

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样本	m（熟料）/ g	m（生物质灰渣）/g	m（标准砂）/g	需水量/ g	初凝、终凝时间/min
对照组	450	0	1 350	225	154/225
BFA10	405	45	1 350	225	172/242
BFA20	360	90	1 350	225	187/251
BFA30	315	135	1 350	225	206/278

w（SiO₂）	w（CaO）		w（Al₂O₃）		w（SO₃）		w（Fe₂O₃）		w（K₂O）
45.3	19.9		13.0		4.8		4.6		4.3
w（MgO）		w（P₂O₅）		w（MnO）		w（Na₂O）		w（Cl）
2.7		1.7		2.7		0.8		0.2

样本	体积密度/ （kg·m^-3）	复合胶凝材料密度/（kg·m^-3）	总孔隙率/ %
对照组	2 084±42	2 663±17	22.1±1.1
BFA10	2 051±40	2 655±16	23.7±1.2
BFA20	2 040±38	2 648±15	24.1±1.4
BFA30	2 008±39	2 641±15	26.2±1.8

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Study on performance of biomass power plant ash as alternative to cement clinker in blended cements

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