Inorganic Chemicals Industry >
Experimental study on activating various industrial residues to compound and prepare cementitious materials
Received date: 2020-08-21
Online published: 2021-02-06
Clinker-lean cement was produced with coal gangue slag,magnesium slag,fly ash and other industrial residues as the main raw materials.The raw materials were ground and screened,their composition was analyzed with fluoroanalyzer and XRD,and three groups i.e.nine proportion schemes was designed as follows: three groups of coal gangue slag-magesium slag-clinker-gypsum,three groups of coal gangue slag-fly ash-lime-gypsum and three groups of coal gangue slag-fly ash-calk.The physical properties such as strength,setting time,standard consistency requiring water and stability of products of nine sche-mes were detected.The results showed that due to double activation of lime and gypsum,the degree of hydration and hardening of coal gangue slag and fly ash was higher and the strength of the prepared cementitiou product was the biggest,flexural strength and compressive strength for 28 d were 8.2 MPa and 42.4 MPa,respectively.The optimal proportion scheme after experiment was 15∶30∶45∶10（mass ratio of coal gangue ash to fly ash to lime to gypsum）.
Key words： industrial residue; reactivity activating; cementing materials
Jianrong Gao , Wenyu Li , Yanmei Yu , Yongming Liu . Experimental study on activating various industrial residues to compound and prepare cementitious materials[J]. Inorganic Chemicals Industry, 2021 , 53(2) : 77 -80 . DOI: 10.11962/1006-4990.2020-0165
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