Development of new geopolymers based on stone cutting waste

authors	Simao, L; Hotza, D; Ribeiro, MJ; Novais, RM; Montedo, ORK; Raupp-Pereira, F
nationality	International
journal	CONSTRUCTION AND BUILDING MATERIALS
author keywords	Geopolymers; Stone cutting waste; Recycling; Calcium; Alkali activation
keywords	C-S-H; FLY-ASH; STRUCTURAL CHARACTERISTICS; THERMAL-PROPERTIES; ALKALI ACTIVATION; METAKAOLIN; PULP; LIGHTWEIGHT; LIMESTONE; ZEOLITES
abstract	The use of calcium-rich materials in geopolymerization has been reported in the literature and generally induces an increase in mechanical properties. In this work, stone cutting waste (SW) was used in new geopolymers formulations and the interaction of the components was evaluated. In addition to the filler effect, SW affected the compositional system producing different geopolymer gels when compared to the formulation containing only metakaolin. The samples with 50 and 75 wt% SW achieved a compressive strength of similar to 28 and similar to 14 MPa, respectively. In conclusion, SW is a promising raw material for geopolymers, whose properties suggest distinct applications. (C) 2020 Elsevier Ltd. All rights reserved.
publisher	ELSEVIER SCI LTD
issn	0950-0618
isbn	1879-0526
year published	2020
volume	257
digital object identifier (doi)	10.1016/j.conbuildmat.2020.119525
web of science category	Construction & Building Technology; Engineering, Civil; Materials Science, Multidisciplinary
subject category	Construction & Building Technology; Engineering; Materials Science
unique article identifier	WOS:000545559400040