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IKPIR: BIBLIOGRAFIJE: COBISS-ID: 447335 Ljubljana,  

 

Avtorstvo: Jana ŠELIH // 1.01 Izvirni znanstveni članek
Leto: 2000
Citat: TREPPO MEKIŠ, Barbara, ŠELIH, Jana. Optimisation of cement paste quantity in high-strength concrete. V: LEUNG, Christopher K. Y., LI, Zongjin, DING, Jian-Tong. High performance concrete : workability, strength and durability : proceedings of the international symposium ..., Hong Kong & Shenzhen, China, December 10-15, 2000. Hong Kong: The Hong Kong University of Science and Technology, 2000, vol. 2, str. 923-928.
Povzetek: V zadnjih 5 letih so se potrebe po visokotrdnih betonih (BVT) v Sloveniji povečale zaradi obširnega avtocestnega programa. Članek predstavlja rezultate študije optimizacije količine cementne paste v BVT. Izdelali smo postopek določevanja te količine, optimizacijo pretočnosti cementne paste in optimizacijo sestave agregata v betonu tako, da je volumen agregata kar največji. Rezultati kažejo, da je na podlagi tega postopka možno izdelati, na podlagi slovenskih osnovnih materialov, beton s trdnostmi do 90 MPa.

In Slovenia, the need to establish concrete compositions based on locally available materials, which are then produced into durable high-strength concrete is increasing. This paper presents the results of a study, carried out with the intention to develop a procedure to determine the minimum cement paste quantity for high-strength concrete, which is then sufficiently workable for the production of precast concrete elements and on construction sites. The results presented show that compressive strengths of approximately 70 MPa after 28 days can be achieved by using this method. Different types of aggregate and variable mineral and chemical admixtures were used in the preparation of the concrete mixtures. Aggregate grading must be optimised so that the proportion of its voids is at a minimum and that the fluidity of the cement paste into which the aggregate grains are ambedded is adequate.
Tipologija: 1.01 Izvirni znanstveni članek
COBISS ID 447335 Polni zapis iz sistema COBISS
Vpisal 2001/08/08 19:56