Impact and dynamic resistance of SFRCC modified by varied superplasticizers

• Autorzy: Katzer J.

Warianty tytułu

PL

Uderzeniowa i dynamiczna odporność fibrokompozytów cementowych modyfikowanych różnymi superplastyfikatorami

• Języki publikacji: EN

Abstrakty

EN

The paper presents results of examinations of steel fiber reinforced cement composites (SFRCC) modified by superplasticizers based on different chemical substances. The described SFRCC were made on the basis of fine aggregate cement matrix modified by steel fibers of an aspect ratio l/d = 50. Fine aggregate matrix composed of waste aggregate (obtained during hydroclassification) was modified by an addition from 0% to 2.8% (by volume) of hooked steel fibers and 1% of superplasticizer. After establishing basic parameters of fresh mix and hardened fiber reinforced composites, the main tests were a drop-weight test of the SFRCC plates and dynamic harmonic loading of beams. Results achieved this way allowed to specify the influence of the specific superplasticizer on the behaviour of SFRCC subjected to a dynamic force.

PL

W referacie przedstawiono wyniki badań nad fibrokompozytami cementowymi wykonanymi na bazie drobnych kruszyw odpadowych. Do wykonania fibrokompozytów wykorzystano włókna stalowe produkcji krajowej. Włókna dozowano w ilości od 0 do 2,8% (objętościowo). Badania obejmowały swym zakresem dwa etapy. Etap pierwszy stanowiły badania cech świeżej mieszanki (konsystencja) oraz badania stwardniałych fibrokompozytów wykonane w sposób statyczny (gęstość, wytrzymałość na ściskanie). Drugi etap stanowiły badania cech dynamicznych omawianych fibrokompozytów obejmujące swym zakresem badania uderzeniowe oraz badania przy obciążeniu harmonicznym. Badania przy obciążeniu harmonicznym prowadzono na polowym stanowisku laboratoryjnym przy wykorzystaniu próbek wielkowymiarowych o długości 2000 mm i przekroju 200 mm x 100 mm.

Słowa kluczowe

EN

aggregate; cement; composite; fiber; waste

PL

kruszywo; cement; kompozyty; fibrokompozyt cementowy; odpady

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2011
• Tom: Vol. 11, no 1
• Strony: 103--113
• Opis fizyczny: Bibliogr. 22 poz., rys., tab., wykr.

Twórcy

autor

Katzer J.

• Koszalin University of Technology, ul. Śniadeckich 2, 75-453 Koszalin, Poland

Bibliografia

• [1] Luo X., Sun W., Chan S.: Characteristics of high-performance steel fiber-reinforced concrete subject to high velocity impact, Cement and Concrete Research, Vol. 30, No. 6, 2000, pp. 907-914.
• [2] Maidl B.R.: Steel fibre reinforced concrete, Ernest&Sohn, Berlin, 1995.
• [3] Johnston C.D.: Fiber reinforced cements and concretes, Gordon and Breach Science Publisher, Ottawa, 2001.
• [4] Weiss H.J., Edgington J.: On the workability of steel fiber mortar mix, Archiwum Inżynierii Lądowej, Vol. XXXIII, No. 1, 1987, pp. 3-7.
• [5] Nawy E.G.: Fundamentals of high strength high performance concrete, Longman, Harlow, Essex, England, 1996.
• [6] Katzer J.: Mechanical properties of fine aggregate SFRC beams under dynamic load, Proceedings, 1st Central European Congress on Concrete Engineering "Fibre Reinforced Concrete in Practice", 8-9 September 2005, Graz, Austria, pp. 81-84.
• [7] Katzer J., Piątek Z.: Chosen Features of fine aggregate concrete modified by silica fume and steel fibre, Proceedings, International Conference "Concrete and Concrete Structures", 28-29 April 1999, Žilina, Slovakia, pp. 41-46.
• [8] Al-Khalaf M.N., Page C.L., Ritchie A.G.B.: Effects of fibre surface composition on mechanical properties of steel fibre reinforced mortars, Cement and Concrete Research, Vol. 10, No. 1, 1980, pp. 71-77.
• [9] Cao J., Chung D.D.L.: Improving the dispersion of steel fibers in cement mortar by the addition of silane, Cement and Concrete Research, Vol. 31, No. 2, 2001, pp. 309-311.
• [10] Kosa K., Naaman A.E., Hansen W.: Durability of fiber reinforced mortar, ACI Materiale Journal, Vol. 88, No. 3, 1991, pp. 310-319.
• [11] Colepardi M.: The new concrete, Grafiche Tintoretto, Italy, 2006.
• [12] Spiratos N., et al.: Superplasticizers for concrete, Marquis, Quebec, Canada, 2006.
• [13] Katzer J.: Strength and watertightness of fiber reinforced concrete modified by silica fume, e-Mat - Revista de Ciência e Tecnologia de Materiais de Construção Civil, Vol. 2, No. 2, 2005, pp. 157-161.
• [14] Katzer J.: Strength, deflection and watertightness of steel fiber reinforced concrete modified by silica fume, West Indian Journal of Engineering, Vol. 30, No. 2, 2008, pp. 50-56.
• [15] Katzer J.: Permeability of SFRCC based on fine aggregate after pre-load cycles, Proceedings, Brittle Matrix Composites 9, 25-28 October, 2009, Warsaw, Poland, pp. 139-148.
• [16] FHWA-IF-05-016, Silica fume user's manual, Silica fume association, April, 2005.
• [17] Katzer J.: Dynamic properties of SFRM beams modified by varied superplasticizers, Proceedings (Supplementary Papers), Eighth CANMET/ACI International conference on superplasticizers and other chemical admixtures in concrete, 29 October-1 November 2006, Sorrento, Italy, pp. 21-35.
• [18] Katzer J.: Beschreibung der granulometrischen Eigenschaften der Zuschlagstoffe Mittelpommerns mithilfe des Median-Korns, BetonWerk International, No. 06, 2003, pp. 7-12.
• [19] Katzer J., Kobaka J.: The assessment of fine aggregate pit deposits for concrete production, Kuwait Journal of Science and Engineering, Vol. 33, No. 2, 2006, pp. 165-174.
• [20] Borovikov I.P., Borovikov V.P.: STATISTICA data preparation and analysis, Filini, Moscow, 1998.
• [21] Afifi A.A., Clark V.: Computer aided multivariate analysis, Chapman & Hall, London, 1999.
• [22] Lee-Ing T., Chung-Ho W.: STATISTICA V5.5 and basic statistic analysis, TasngHai Publisher, Taiwan, 2002.