Use of phosphate mine by-products as supplementary cementitious materials

This work evaluates the potential use of clays by-products produced during phosphate mining as a novel supplementary cementitious material. The evaluation was conducted through (i) determination of physical, chemical, and mineralogical characteristics of samples (ii) the evaluation of clays thermal...

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Bibliographic Details
Main Authors: Bahhou, Abdelmoujib, Taha, Yassine, El Khessaimi, Yassine, Idrissi, Hicham, Hakkou, Rachid, Amalik, Jamal, Benzaazoua, Mostafa
Format: Conference Proceeding
Language:English
Subjects:
Calcined clays
Cement
Mortar
Phosphate mine
Supplementary cementitious materials
Waste
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Summary:This work evaluates the potential use of clays by-products produced during phosphate mining as a novel supplementary cementitious material. The evaluation was conducted through (i) determination of physical, chemical, and mineralogical characteristics of samples (ii) the evaluation of clays thermal activation from 500 to 900 °C, and (iii) the assessment of the rheological and mechanical properties. Results showed that 800 °C was the optimal activation temperature. Substitution of clinker by 20 wt% of calcined clay allows to obtain a compressive strength higher than 22 MPa at 28 days. Consistency and initial setting time values were in agreement with the required cement standard.
ISSN:2214-7853
2214-7853
DOI:10.1016/j.matpr.2020.07.619