Durability of Laterized Concrete Exposed to Sulphate Attack Under Drying-Wetting Cycles.
作者： Olusola Kolapo Olubunmi , Ata Olugbenga
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摘要: The study investigated the performance of laterized concrete exposed to drying-wetting cycles sulphate environments with a view providing empirical data for specification. It adopted accelerated ageing method investigate effect attack on wetting-drying cycle comprising 4 days full immersion and 3 drying at ambient temperature two concentrations (3% 5%) magnesium solution total exposure period 24 weeks. test cubes were first cured by complete in water 28 afterward solution. compressive strength was determined using an ELE 2000kN compression testing machine. Data obtained from experiments analysed percentages, mean, ANOVA regression analysis. results tests carried out showed that conventional had better resistance (in terms strength) than concrete. Conventional cyclically 3% 5% lost 18.91% - 30.34% its strength, after weeks exposure. Whereas, similarly same period; 26.54% 31.79% (at 20% laterite content) 36.67% 51.33% 40% strength. tested specimen decreased significantly between 10% 50%, each ? = 0.05 increasing concentration, content period. concluded performed intermittently sulphate-laden environments. Keywords: Laterized concrete, Sulphate, Durability, Compressive
iiste.org参考文章(13)
Jan P. Skalny, Ivan Odler, J. Marchand, Sulfate attack on concrete ,(2001)
Adam Matthew Neville, Properties of concrete ,(1968)
Manu Santhanam, Menashi D. Cohen, Jan Olek, MECHANISM OF SULFATE ATTACK: A FRESH LOOK. PART 2: PROPOSED MECHANISMS Cement and Concrete Research. ,vol. 33, pp. 341- 346 ,(2003) , 10.1016/S0008-8846(02)00958-4
Felix F. Udoeyo, Udeme H. Iron, Obasi O. Odim, Strength performance of laterized concrete Construction and Building Materials. ,vol. 20, pp. 1057- 1062 ,(2006) , 10.1016/J.CONBUILDMAT.2005.03.002
Thidar Aye, Chiaki T. Oguchi, Resistance of plain and blended cement mortars exposed to severe sulfate attacks Construction and Building Materials. ,vol. 25, pp. 2988- 2996 ,(2011) , 10.1016/J.CONBUILDMAT.2010.11.106
Bing Tian, Menashi D Cohen, Does gypsum formation during sulfate attack on concrete lead to expansion? Cement and Concrete Research. ,vol. 30, pp. 117- 123 ,(2000) , 10.1016/S0008-8846(99)00211-2
M.A Salau, Long-term deformations of laterized concrete short columns Building and Environment. ,vol. 38, pp. 469- 477 ,(2003) , 10.1016/S0360-1323(02)00014-8
D. Adepegba, A comparative study of normal concrete with concrete which contained laterite instead of sand Building Science. ,vol. 10, pp. 135- 141 ,(1975) , 10.1016/0007-3628(75)90029-8
J.A Osunade, Effect of replacement of lateritic soils with granite fines on the compressive and tensile strengths of laterized concrete Building and Environment. ,vol. 37, pp. 491- 496 ,(2002) , 10.1016/S0360-1323(01)00049-X
RL Meltzer, YR Fiorini, RT Horstman, IC Moore, AL Batik, D Adepegba, The Effect of Water Content on the Compressive Strength of Laterized Concrete Journal of Testing and Evaluation. ,vol. 3, pp. 449- 453 ,(1975) , 10.1520/JTE11701J