EFFECT OF SILICA FUME AND NATURAL POZZOLANAS ON SULFURIC ACID RESISTANCE OF DENSE CONCRETES

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RAHMANI H.; RAMZANIANPOUR A.A.

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Journal Paper

Paper Information

Journal: ASIAN JOURNAL OF CIVIL ENGINEERING (BUILDING AND HOUSING) Year:2008 | Volume:9 | Issue:3 Page(s): 303-319

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Title

EFFECT OF SILICA FUME AND NATURAL POZZOLANAS ON SULFURIC ACID RESISTANCE OF DENSE CONCRETES

Author(s)

RAHMANI H. | RAMZANIANPOUR A.A. | Issue Writer Certificate

Keywords

DENSE PACKING

POROSITY

SILICA FUME

NATURAL POZZOLANAS

SULFURIC ACID ATTACK

ULTRA FINE FILLER

Abstract

Biogenic sulfuric acid corrosion is often a problem in sewer environments. Also in certain industrial activities sulfuric acid is used during the production process. İt can lead to a fast degradation of the concrete structures. Therefore there is a substaintial need for construction of durable concrete structures in such environments. The POROSITY of concretes plays an important role in harsh environments. For production of low POROSITY or high density concretes, optimization of aggregate and cement grading and their proporations is necessary. The size distribution of aggregates and cement materials determine the compactibility and highest local density of particles. DENSE PACKING of concrete particles in the mixes lead to low cement content and high-strength of low POROSITY mortar and concretes. A research program was under taken to improve concrete resistance against SULFURIC ACID ATTACK. Five concrete mixtures were investigated, first mix contains Type 2 portland cement as a control mix and the second one contains Type 2 portland cement and super fine Quartz powder as a filler with particle size between 0 to 16 micron. Third mix contains Type 2 portland cement with 8% SILICA FUME (SF) replacement and super fine filler. Other mixes contain Type 2 portland cement with 20% NATURAL POZZOLANAS replacement namely Trass and Pumice and super fine filler. The DENSE PACKING of siliceous aggregates and cement materials were used to achieve the highest density of concretes. Fuller ideal grading curve for particle size distribution (PSD) of cement material was used. The PSD of the Quartz powder, SILICA FUME, NATURAL POZZOLANAS and cement were analayzed to explain the packing effect of super fine Quartz powder. Cementitious material content and water binder ratio were varried in this investigation. İn the experiment, concrete cubes and mortar plates were immersed in sulfuric acid with pH=1.0. They were periodically examined for appearance, measured for mass change and tested in compression and flexure up to 180 days. The performance of mortar and concretes containing Trass and ULTRA FINE FILLER was better than the other mixes. Also performance of other mixtures was better than the control mixture.

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APA: Copy

RAHMANI, H., & RAMZANIANPOUR, A.A.. (2008). EFFECT OF SILICA FUME AND NATURAL POZZOLANAS ON SULFURIC ACID RESISTANCE OF DENSE CONCRETES. ASIAN JOURNAL OF CIVIL ENGINEERING (BUILDING AND HOUSING), 9(3), 303-319. SID. https://sid.ir/paper/298770/en

Vancouver: Copy

RAHMANI H., RAMZANIANPOUR A.A.. EFFECT OF SILICA FUME AND NATURAL POZZOLANAS ON SULFURIC ACID RESISTANCE OF DENSE CONCRETES. ASIAN JOURNAL OF CIVIL ENGINEERING (BUILDING AND HOUSING)[Internet]. 2008;9(3):303-319. Available from: https://sid.ir/paper/298770/en

IEEE: Copy

H. RAHMANI, and A.A. RAMZANIANPOUR, “EFFECT OF SILICA FUME AND NATURAL POZZOLANAS ON SULFURIC ACID RESISTANCE OF DENSE CONCRETES,” ASIAN JOURNAL OF CIVIL ENGINEERING (BUILDING AND HOUSING), vol. 9, no. 3, pp. 303–319, 2008, [Online]. Available: https://sid.ir/paper/298770/en

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