Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
COMPOSITION OF HIGH TENSILE STRENGTH CEMENT-BASED MIXTURE WITH IMPROVED RHEOLOGICAL PROPERTIES
A composition comprising the following materials (weight proportions): 1000 parts of hydraulic binder, 600-2900 parts of dry granular material with size (D90) smaller than 5.0 mm, 5-130 parts of expansive agent, 5-400 parts of high- modulus (more than 20 GPa) fibers, 1-40 parts of water reducing agent (dry mass), 1-200 parts of colloidal silica (dry mass), 150-550 parts of water, 0-200 parts of filler with size smaller than 0.200 mm, 0-10 parts of shrinkage reducing agent (dry mass). A high-tensile strength hardened mixture can be obtained by means of this composition, thanks to the synergic effect due to the presence of both high-modulus fibers and expansive agent, producing a beneficial self- prestress effect, homogenously diffused. This effect is obtained if both kinetic of expansive reaction and expansion rate are carefully controlled, as a function of the amount of fiber reinforcement used in the mixture. Also the other concrete ingredients such as hydraulic binder and inert granular materials play a fundamental role, indeed, by indirectly influencing both kinetic and rate of expansion. Finally, due to the addition of colloida silica an excellent flowability of the mixture at the fresh state can be achieved (in absence of both bleeding and segregation).
COMPOSITION OF HIGH TENSILE STRENGTH CEMENT-BASED MIXTURE WITH IMPROVED RHEOLOGICAL PROPERTIES
A composition comprising the following materials (weight proportions): 1000 parts of hydraulic binder, 600-2900 parts of dry granular material with size (D90) smaller than 5.0 mm, 5-130 parts of expansive agent, 5-400 parts of high- modulus (more than 20 GPa) fibers, 1-40 parts of water reducing agent (dry mass), 1-200 parts of colloidal silica (dry mass), 150-550 parts of water, 0-200 parts of filler with size smaller than 0.200 mm, 0-10 parts of shrinkage reducing agent (dry mass). A high-tensile strength hardened mixture can be obtained by means of this composition, thanks to the synergic effect due to the presence of both high-modulus fibers and expansive agent, producing a beneficial self- prestress effect, homogenously diffused. This effect is obtained if both kinetic of expansive reaction and expansion rate are carefully controlled, as a function of the amount of fiber reinforcement used in the mixture. Also the other concrete ingredients such as hydraulic binder and inert granular materials play a fundamental role, indeed, by indirectly influencing both kinetic and rate of expansion. Finally, due to the addition of colloida silica an excellent flowability of the mixture at the fresh state can be achieved (in absence of both bleeding and segregation).
COMPOSITION OF HIGH TENSILE STRENGTH CEMENT-BASED MIXTURE WITH IMPROVED RHEOLOGICAL PROPERTIES
ZUSAMMENSETZUNG EINER HOCHZUGFESTEN MISCHUNG AUF ZEMENTBASIS MIT VERBESSERTEN RHEOLOGISCHEN EIGENSCHAFTEN
COMPOSITION DE MÉLANGE À BASE DE CIMENT À HAUTE RÉSISTANCE À LA TRACTION PRÉSENTANT DES PROPRIÉTÉS RHÉOLOGIQUES AMÉLIORÉES
CORINALDESI VALERIA (Autor:in)
16.09.2020
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
COMPOSITION OF HIGH TENSILE STRENGTH CEMENT-BASED MIXTURE WITH IMPROVED RHEOLOGICAL PROPERTIES
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