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| Avtorstvo: |
Jana ŠELIH // 1.01 Izvirni znanstveni članek
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| 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 |
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Vpisal 2001/08/08 19:56
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