Open Journal Systems

Porosity and Strength of Pozzolan Modified Cement Systems

C M. Sutan, Sinin Hamdan, Habibur Rahman Sobuz, Vincent Laja, Md. Saiful Islam


Porosity is one of the important properties that determine the durability of concrete and mortar. Porosity represents the amount of voids inside the concrete, which is dimensionless quantity, usually expressed as a percentage value. This aim of this study is to determine the effect of pozzolans such as pulverized fly ash (PFA) silica fume (SF) on the porosity and strength of mortars. The mix proportion with and without pulverized fly ash (PFA) and silica fume (SF) are tested with two properties such as strength and porosity in order to understand the effect against performance of the mortar. In addition, curing condition also does affect the strength and porosity of the modified mortar. The results from this study shows that the pozzolan modified mortar which is the sample with pozzolan replacement, has low in durability and higher porosity compared with non-modified mortar when it is cured under air curing, which is the method of curing that usually been applied at the construction site.


porosity; strength; pozzolan; mortar; air curing; fly ash; silica fume

Full Text:



Mehta, P. K. and Monteiro, P. J. M. Concrete: microstructure, properties, and materials, 3rd ed. 2006, New York: McGraw-Hill, 659 p.

Martys, N.S. Survey of concrete transport properties and their measurement, NISTIR 5592, US Department of Commerce, 1996, p. 1–40.

Drazan, J. and Zelic, J. The effect of fly ash on cement hydratıon in aqueous suspensions, Ceramics−Silikaty, 2006, 50(2): 98-105.

Yilmaz, B. Olgun, A. Studies on cement and mortar containing low-calcium fly ash, limestone, and dolomitic limestone, Cement Concrete Compos. 2008, 30: 194-201.

Worrell, E., Martin, N. and Price, L. Potentials for energy efficiency improvement in the US

cement industry, Energy, 2000, 25(12): 1189-1214.

Fu, X., Wang, Z., Tao, W., Yang, C., Hou, W., Dong, Y. and Wu, X. Studies on blended cement with a large amount of fly ash, Cement Concrete Res, 2002, 32(79): 1153-1159.

Ahmaruzzaman, A. M. Review on the utilization of fly ash, Progress in Energy and Combustion Science, 2009, pp. 1-37. (in press).

Neville, A. M. Properties of Concrete, 4th and Final ed., 1996, Harlow, England: Longman.

Ganjian, E and Pouya H.S. The effect of Persian Gulf tidal zone exposure on durability of mixes containing silica fume and blast furnace slag, Constr. Build Mater, 2009, 23: 644-652.

Subasi, S. The Effects of Using Fly Ash on High Strength Lightweight Concrete Produced with Expanded Clay Aggregate, Scientific Research and Essays, 2009, 4(4): 275-288.

Yildiz, S., Balaydin, I. and Ulucan, Z. The Effect of Rice Husk Ash on Concrete Strength (in Turkish), Sci. Eng. J. Fırat Univ., 2007, 19(1): 85-91.

Kaid, N., Cyr, M., Julien, S. and Khel, H. Durability of concrete containing a natural pozzolan by a performance-based approach, Constr. Build Mater, 2009, 23: 3457-3467.

ASTM C 618-8. Standard specifications for fly ash and raw or calcined natural pozzolan for use as mineral admixture in Portland cement concrete, ASTM. Philadelphia, 1985, USA.

Aruntas, H.Y. The potential of fly ash usage in construction sector, J. Fac. Eng. Arch. Gazi Univ., 2006, 21(1): 193-203. (in Turkish).

Neville, A.M. Properties of concrete, Pearson Education limited, 2006, England.

Mazloom, M., Ramezanianpour, A. A. and Brooks, J. J. Effect of silica fume on mechanical properties of high-strength concrete, Cement Concrete Compos, 2004, 26: 347-357.

Sanchez, F. and Ince, C. Microstructure and macroscopic properties of hybrid carbon nano.ber/silica fume cement composites, Compos Sci. Technol, 2009, 69: 1310-1318.

Jo, B.W., Kim, C. H., Tae, G. and Park, J. B. Characteristics of cement mortar with nano-SiO2 particles, Constr. Build Mater, 2007, 21: 1351-1355.

Qing, Y., Zenan, Z., Deyu, K. and Rongshen, C. Influence of nano-SiO2 addition on properties of hardened cement paste as compared with silica fume, Constr. Build Mater, 2007, 21: 539-545.

Song, H. W., Pack, S.W., Nam, S. H., Jong, J. C. and Saraswathy, V. Estimation of the permeability of silica fume cement concrete, Constr. Build Mater, 2010, 24: 315-321.

Yildiz, K. The performance of silica fume admixtured concrete under the effect of ammonium sulfate (in Turkish), E-J. New World Sci. Acad Technol. Appl. Sci., 2008, 3(2): 1-9.

Malolepszy, J. and Deja, J. The effect of variable curing conditions on the properties of mortars with Silica Fumes, Proceeding: Fourth International Conference, Istanbul, Turkey, May 1992; Fly ash, Silica fumes, Slag, and Natural Pozzolans in Concrete Volume II., 1992,

Editor: V. M. Malhotra. ACI SP-132

Satish, C. and Yoshihiko, O. Polymers in concrete, 1994, (CRC Press, Inc. Florida)

Kocak, Y. A study on the effect of fly ash and silica fume substituted cement paste and mortars, Scientific Research and Essays, 2010, 5(9): 990-998.

Khan, M.I., Lynsdale, C.J. and Waldrom, P. Porosity and strength of PFA/SF/OPC ternary blended paste, Cem Concr Res, 2000, 30:1225–9.

Pandey, S.P. and Sharma, R. L. The influence of mineral additions on the strength and porosity of OPC mortar, Cem Concr Res, 2000, 30(1):19–23.


  • There are currently no refbacks.