Use of tartaric acid for the production of sustainable Portland-free CSA-based mortars

•Sustainable OPC-free mortars with CSA and SCMs were investigated.•Tartaric acid acts as superplasticizer and set-retarding admixture.•Shrinkage and mechanical properties are influenced by tartaric acid addition.•About 60% reduction in Gross Energy Requirement and CO2 emissions was achieved. The pur...

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Bibliographic Details
Published in:Construction & building materials 2018-05, Vol.171, p.243-249
Main Authors: Coppola, L., Coffetti, D., Crotti, E.
Format: Article
Language:English
Subjects:
Calcium sulphoaluminate cement
Cements (Building materials)
Composition
Set-retarding admixtures
Sulfonamides
Supplementary cementitious materials
Sustainability
Tartaric acid
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Summary:•Sustainable OPC-free mortars with CSA and SCMs were investigated.•Tartaric acid acts as superplasticizer and set-retarding admixture.•Shrinkage and mechanical properties are influenced by tartaric acid addition.•About 60% reduction in Gross Energy Requirement and CO2 emissions was achieved. The purpose of the study is to evaluate the effect of a tartaric acid-based set retarding admixture on rheological, elastic and physical performances of sustainable mortars manufactured with calcium sulfoaluminate, anhydrite and Supplementary Cementitious Materials replacing totally OPC. Experimental results indicated that the tartaric acid acts as superplasticizer and it is effective to extend the pot-life of mortars up to about 2 h. On the other hand, the set-retarding admixture provides a strong retardation of binder hydration resulting in a reduction of initial expansion and compressive strength at early ages. However, this retarding effect disappears at long ages.
ISSN:0950-0618
1879-0526
DOI:10.1016/j.conbuildmat.2018.03.137