Tag: silica fume

Recent Articles-IJCSER

Determination of Modulus of Rupture of Pavement Concrete with Silica Fume and Fly Ash using Taguchi Technique
Author(s) – Osman Unsal Bayrak, Fatih Hattatoglu , Sinan Hinislioglu

ABSTRACT
The purpose of this study is to optimize the 28 days modulus of rupture of concrete pavement (CP) by using the Taguchi Method. The experiments were designed using an orthogonal array technique in L16 array with four factors, namely, the water/cementitious ratio of 0.30, 0.35, 0.40 and 0.45, four different types of gradations with maximum aggregate size of 32 mm,      0, 5, 10, 15% Fly ash and 0, 10, 20 and 30% Silica fume by weight of cement. The signal to noise ratio (S/N) were calculated for evaluating the experimental results then the S/N values were analyzed using an analysis of variance (ANOVA) technique. According to the ANOVA results, water/cementitious ratio play significant role for modulus of rupture of CP. Moreover, the optimum conditions were found to be 0.30 water/cementitious ratio, type IV gradation containing 33% from 16-32 mm sieve, 20% from 8-16 mm, 17% from 4-8 mm and 30% from 0-4 mm aggregate, 10% FA content and 20% SF content for 28 days modulus of rupture. The modulus of rupture of 6.70MPa was obtained at the optimum conditions.

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Recent Articles-IJCSER-Effect of Cadmium Chloride on High Performance Cement Mortar

ABSTRACT
Civilization also produces waste products. Disposal issue of the waste products is a challenge. Some of these materials are not biodegradable and often leads to waste disposal crisis and environmental pollution. The present study seeks the possibilities of whether some of these waste products can be utilized as construction materials. Electroplating industry is one which is mainly spread out in small sectors throughout India. The pollutants from the electroplating industry are invariably hazardous. Cadmium is one such metal which is obtaining as industrial waste from the electroplating industry. Experimental studies are carried out in the present investigations to check the suitability of industrial waste water containing heavy metal such as cadmium on hardening and compressive strength of cement and also soundness of cement. Concrete structures are becoming more exposed to severe environments and loadings. The performance of concrete structures under severe conditions is very important because they deteriorate fast under such severe conditions. The deterioration will reduce the service life of structures and will eventually cause a drastic increase in social costs. In cement mortar, the porosity decreases with low water-cement ratio and with longer curing period due to hydration process. This is closely related to strength characteristics. Hence, in this present study, high performance cement mortar was obtained by using mineral admixture silica fume, and high range water reducers.

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