Properties of Cement Mortar Using Limestone Sludge Powder Modified with Recycled Acetic Acid

One of the various methods of manufacturing low-carbon cement is substituting limestone powder as a raw material or admixture. Limestone sludge powder (LSSP) has the same composition as that of limestone powder. The surface characteristics of LSSP powder modified with recycled acetic acid (RAA) and...

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Bibliographic Details
Published inSustainability Vol. 11; no. 3; p. 879
Main Authors Ryu, Hwa-Sung, Kim, Deuck-Mo, Shin, Sang-Heon, Kim, Wan-Ki, Lim, Seung-Min, Park, Won-Jun
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 08.02.2019
Subjects
Acetic acid
Acids
Aging
Aqueous solutions
Calcium
Calcium acetate
Cement
Curing
Fourier transforms
Fruits
Grain size
Hydration
Limestone
Particle size
Powder
Production methods
Scanning electron microscopy
Sludge
Substitutes
Surface properties
Sustainability
Vacuum distillation
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Summary:One of the various methods of manufacturing low-carbon cement is substituting limestone powder as a raw material or admixture. Limestone sludge powder (LSSP) has the same composition as that of limestone powder. The surface characteristics of LSSP powder modified with recycled acetic acid (RAA) and the characteristics of cement using this modified LSSP as a substitute were investigated in this study. The surface of LSSP modified with RAA was converted into calcium acetate and had a large grain size. When conventional LSSP was used as a substitute for cement, the initial strength increased owing to improved pore filling; however, the strength after 28 days of aging was lower than that of non-substituted cement. In the case of modified LSSP being replaced with cement at up to 10% of the cement weight, however, the calcium acetate on its surface increased the amount of hydration products in the cement, thereby increasing both the initial and the long-term strength.
ISSN:2071-1050
2071-1050
DOI:10.3390/su11030879