复合外加剂对铬铁渣基复合材料水化机理的影响<sup>*</sup>

doi:10.11896/j.issn.1005-023X.2017.04.026

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Abstract The phase composition, microstructure and morphology of hydration products of ferrochrome slag based composite material were characterized by means of X-ray analysis (XRD), thermogravimetry-differential scanning calorietry (TG-DSC) and scanning electron microscopy (SEM). The porosity of the composite material was determined by methanol method. The influence of compound admixtures on the hydration process of composite materials was researched. It was showed that the remarkable increase of early strength of the ferrochrome slag based composite material was attributed to the formation of much more hydration products such as ettringite and calcium silicate hydrate gel after adding compound admixtures. At later ages, secondary hydration reaction of ferrochrome slag, blast slag and fly ash was improved under the action of compound admixtures. The microstructure of composite material was more compact because a large amount of hydrate calcium silicate gel was formed to fill the void existed in the composite material.

Key words： compound admixtures hydration properties ettringite calcium silicate hydrate

Published: 02 May 2018

CLC number:	TQ172.9
	X757

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.04.026 OR http://www.mater-rep.com/EN/Y2017/V31/I4/121

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