A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Influence of Superplasticizers on the Early Hydration of Portland Cement and Cement Compounds
The interaction of superplasticizers with portland cement, pure alite (C3A) was studied using adsorption studies, calorimetry, x-ray diffraction, thermal analysis, and scanning electron microscopy. Three different superplasticizers - Mighty 100, Melment L-10A, and Mulcoplast - were used. The superplasticizers were strongly and rapidly adsorbed by all cements and cement compounds. Adsorption was greatest into C3A, but in the presence of gypsum the rate of adsorption was slower. No correlation was observed between adsorption and initial slump or slump loss. Slump loss was greatest for mortars made with pure alite. The very early hydration reactions were retarded by the superplasticizers. In the case of C3A the composition of the hydration products were unchanged in the first hour of hydration, but morphological differences were observed. Changes in the hydration of alite and cements during the first hour could not be adequately documented using the available techniques.
Influence of Superplasticizers on the Early Hydration of Portland Cement and Cement Compounds
The interaction of superplasticizers with portland cement, pure alite (C3A) was studied using adsorption studies, calorimetry, x-ray diffraction, thermal analysis, and scanning electron microscopy. Three different superplasticizers - Mighty 100, Melment L-10A, and Mulcoplast - were used. The superplasticizers were strongly and rapidly adsorbed by all cements and cement compounds. Adsorption was greatest into C3A, but in the presence of gypsum the rate of adsorption was slower. No correlation was observed between adsorption and initial slump or slump loss. Slump loss was greatest for mortars made with pure alite. The very early hydration reactions were retarded by the superplasticizers. In the case of C3A the composition of the hydration products were unchanged in the first hour of hydration, but morphological differences were observed. Changes in the hydration of alite and cements during the first hour could not be adequately documented using the available techniques.
Influence of Superplasticizers on the Early Hydration of Portland Cement and Cement Compounds
C. J. Duston (author) / J. F. Young (author)
1982
116 pages
Report
No indication
English
Construction Equipment, Materials, & Supplies , Physical & Theoretical Chemistry , Portland cements , Hydration , Plasticizers , Water reducing agents , Adsorption , Calorimetry , X ray diffraction , Thermal analysis , Cements , Calcium silicates , Molecular structure , Chemical composition , Chemical reactions , Superplasticizers , Mighty 100 , Melment L-10A , Scanning electron microscopy , Alite , Calcium aluminates , Mulcoplast
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