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W. Gilewski and M. Sitek

. 2007; 14:431-456. 4. Witkowski W., 4-node combined shell element with semi-EAS-ANS strain interpolations in 6-parameter shell theories with drilling degrees of freedom. Comp. Mech. 2009; 43(2):307-319. 5. Kączkowski Z., Plates-static calculations. (in Polish) Arkady: Warsaw, 1980. 6. Gilewski W., Gomuliński A., Physical shape functions in finite element analysis of moderately thick plates. Int. Journ. Num. Meth. Engrg. 1991; 32:1115-1136. 7. Bathe K.J., Dvorkin E., A formulation of general shell elements

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Ioan Sabin Sopa and Marcel Pomohaci

systems specify to the training in military pentathlon. The 23rd International Conference Knowledge-Based Organization , Vol. XXII, No. 1 , Sibiu, România: “Nicolae Bălcescu” Land Forces Academy Publishing House. Epuran, M. (2001). Psihologia sportului de performanţă. Bucureşti: FEST, 324-336. Harman, E. A. et al. (2008). Prediction of simulated battlefield physical performance from field-expedient tests. U.S. National Library of Military Medicine, Vol. 173 , 36-41. Jeong, C. S. (2006). Characteristics of performance-related physical fitness and

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A. K. Sebaa and M. Belhamra

Abstract

Sand drifting on road networks in the region of the Lower Algerian Sahara is one of the main problems for the sector. Machines are repeatedly deployed to overcome this phenomenon. The long experience acquired while dealing with the removal of sand from roads pushed us to focus on obstacles called “Draas”. The purpose of this study is to perform an optimization of these special protective structures called “Draas”, using a reduced physical model. Model tests were performed in flow channel. The principle of modeling the wind transport using a reduced model is to simulate the wind using a liquid stream while respecting the laws of hydraulic and sedimentological similarity. The results obtained are extrapolated to make a normal size prototype.

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P. Gomathi and A. Sivakumar

Abstract

This study explores the influence of alkali activators on the initiation of polymerization reaction of alumino-silicate minerals present in class-F fly ash material. Different types of fly ash aggregates were produced with silicate rich binders (bentonite and metakaolin) and the effect of alkali activators on the strength gain properties were analyzed. A comprehensive examination on its physical and mechanical properties of the various artificial fly ash aggregates has been carried out systematically. A pelletizer machine was fabricated in this study to produce aggregate pellets from fly ash. The efficiency and strength of pellets was improved by mixing fly ash with different binder materials such as ground granulated blast furnace slag (GGBS), metakaolin and bentonite. Further, the activation of fl y ash binders was done using sodium hydroxide for improving its binding properties. Concrete mixes were designed and prepared with the different fly ash based aggregates containing different ingredients. Hardened concrete specimens after sufficient curing was tested for assessing the mechanical properties of different types concrete mixes. Test results indicated that fly ash -GGBS aggregates (30S2-100) with alkali activator at 10M exhibited highest crushing strength containing of 22.81 MPa. Similarly, the concrete mix with 20% fly ash-GGBS based aggregate reported a highest compressive strength of 31.98 MPa. The fly ash based aggregates containing different binders was found to possess adequate engineering properties which can be suggested for moderate construction works.

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Z. Meyer, R. Coufal, M. Kowalów and T. Szczygielski

Abstract

The problem of consolidation of soil has been widely investigated. The basic approach was given by Terzaghi who assumed soil of constant physical and mechanical parameters. In the case of peat consolidation, the permeability coefficient of soil and the elasticity modulus are functions of the settlement which is an important additional factor. The model proposed here assumes varying the elasticity and permeability coefficients. Moreover, the settlement is described by the so-called elementary curve which was approximated empirically based upon laboratory tests. The model allows to consider the case when the filtration in the peat body goes in horizontal direction. It happens so when the charging layer does not receive outgoing water from the pores. The model includes also the case when the load involving consolidation varies in time i.e. the charging layer grows up gradually. The model has been applied practically in several cases and it comes that there is a good agreement between calculated and measured settlement of the consolidated peat layer.

Open access

M. Iwanski and A. Chomicz-Kowalska

. 10. AASHTO T283 - Standard Method for Test for Resistance of Compacted Bituminous Mixture to Moisture Inducted Damage, Standard Specification for Transportation Materials and Methods of Sampling and Testing. 11. J. Judycki, J. Jaskuła, Investigations into water and frost resistance of asphalt concrete, Road Pavement, 12, 374-378, 1997. 12. M. Iwański, Water and frost resistance of asphalt concrete with quartzite aggregate [in Polish], The Vth International Conference „Durable and safe road pavements”. Poland, Kielce, 11-12 May 1999

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S. Gopinath, P.Ch. Mouli, A.R. Murthy, N.R. Iyer and S. Maheswaran

References 1. T.H. Wee, A.K. Suryavanshi, S.S. Tin, Influence of Aggregate Fraction in the Mix on the Reliability of the Rapid Chloride Permeability Test, Cement & Concrete Composites, 21 , 1, 59-72, 1999. 2. J.Y. Shih, T.P. Chang, T.C. Hsiao, Effect of nanosilica on characterization of Portland cement composite, Cement Concrete Research, 36 , 697-706, 2006. 3. B.W. Jo, C.H. Kim, G. Tae, J.B. Park, Characteristics of cement mortar with Nano-SiO2 particles, Construction and Building Materials, 21 , 6, 1351

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W. Gardziejczyk and M. Wasilewska

. EN 1097-8:2009 Tests for mechanical and physical properties of aggregates. Determination of the polished stone value

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V. Jayanthi and C. Umarani

) “Push-out tests on a new shear connector of I-shape” International journal of steel structures, Vol. 13, No. 3, pp. 519-528. 6. Ali Shariati, N.H. Ramli Sulong, Meldi Suhatril and Mahdi Shariati, (2012) “Investigation of channel shear connectors for composite concrete and steel T-beam”, International journal of physical sciences, Vol. 7(11), pp.1828-1831. 7. Mahdi Shariati, N.H. Ramli Sulong, M.M. Arabnejad K.H, and Mehrdad Mahoutian, (2011) “Shear resistance of channel shear connectors in plain reinforced and lightweight concrete

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W. Gilewski and M. Sitek

MITC shell elements, Comp. Struct., 75, 1-30, 2000. 5. K.J. Bathe, A. Iosilevich, D. Chapelle, An inf-sup test for shell finite elements, Comp. Struct., 75, 439-456, 2000. 6. F. Brezzi, K.J. Bathe, A discourse on stability conditions for mixed finite element formulations. Comp. Meth. Appl. Mech. Eng., 82, 27-57, 1990. 7. F. Brezzi, M. Fortin, Mixed and Hybrid Finite Element Methods. Springer-Verlag 1991. 8. D. Chapelle, K.J. Bathe, The inf-sup test. Comp. Struct., 47, 537-545, 1993. 9. D