Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Synthesis and evaluation of shrinkage-reducing admixture for cementitious materials
This paper describes a chemical process called ethoxylation to synthesize a shrinkage-reducing admixture (SRA). Using 2-butoxy ethanol and ethylene oxide (EO) or propylene oxide (PO), SRA was synthesized in a laboratory. SRA has a great reducing effect on the surface tension of its solution. Reduced free drying shrinkage (FDS) rate can be measured with the increment of dosage for both mortar and concrete. At 2% dosage, free drying shrinkage can be decreased by 30-40% for both mortar and concrete specimens at 60 days. It also reduces autogenous shrinkage for mortar about 20-30% at 90 days with 2% dosage. Comparing with expansive admixture, SRA performance was better than expansive admixture when no water curing is undertaken.
Synthesis and evaluation of shrinkage-reducing admixture for cementitious materials
This paper describes a chemical process called ethoxylation to synthesize a shrinkage-reducing admixture (SRA). Using 2-butoxy ethanol and ethylene oxide (EO) or propylene oxide (PO), SRA was synthesized in a laboratory. SRA has a great reducing effect on the surface tension of its solution. Reduced free drying shrinkage (FDS) rate can be measured with the increment of dosage for both mortar and concrete. At 2% dosage, free drying shrinkage can be decreased by 30-40% for both mortar and concrete specimens at 60 days. It also reduces autogenous shrinkage for mortar about 20-30% at 90 days with 2% dosage. Comparing with expansive admixture, SRA performance was better than expansive admixture when no water curing is undertaken.
Synthesis and evaluation of shrinkage-reducing admixture for cementitious materials
Rongbing, B. (Autor:in) / Jian, S. (Autor:in)
Cement and Concrete Research ; 35 ; 445-448
2005
4 Seiten, 7 Quellen
Aufsatz (Zeitschrift)
Englisch
Synthesis and evaluation of shrinkage-reducing admixture for cementitious materials
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