NOPR Collection:

Preparation of insoluble titanium(IV) phosphate possessing ion-exchange character from ilmenite

2016-07-20T06:34:54Z

Title: Preparation of insoluble titanium(IV) phosphate possessing ion-exchange character from ilmenite Authors: Chakraborty, A K; Biswas, R K Abstract: An amorphous compound having composition TiOHPO₄.2.11H₂O has been prepared by the addition of H₃PO₄ solution to the iron free titanium (IV) solution made from ilmenite. The product shows ion-exchange property towards alkali (Na⁺) and alkaline earth (B⁺⁺) metal ions to a limited extent. The product cannot be crystallized by the conventional method. Page(s): 48-50

Acid base characteristics of binary oxides of Zr with Ce and La

2016-07-20T06:34:22Z

Title: Acid base characteristics of binary oxides of Zr with Ce and La Authors: Sugunan, S; Chemparathy, G V; Paul, Anto Abstract: The surface acidity and basicity of binary oxides of Zr with Ce and La are determined using a series of Hammett indicators and H_{o, max} values are reported. The generation of new acid sites have been ascribed to the charge imbalance of M₁-O-M₂ bonds, where M₁ and M₂ are metal atoms. Both Bronsted and Lewis acid sites contribute to the acidity of the oxides. Page(s): 45-47

Phosphorus furnace slag-A potential waste material for the manufacture of cements

2016-07-20T06:33:59Z

Title: Phosphorus furnace slag-A potential waste material for the manufacture of cements Authors: Singh, N B; Bhattacharjee, K N Abstract: Results showed that 2.5%granulated phosphorus furnace slag (GPFS) mixed with the raw mix in the black meal process of cement manufacture in the vertical shaft kiln (VSK) technology, improved the quality of clinker. GPFS also acted as a blending component with portland cement clinker and when used in appropriate amounts, give comparable compressive strengths at later ages of hydration. Page(s): 41-44

Durability of sulphate resisting slag blended cements and mortars in sea water

2016-07-20T06:33:38Z

Title: Durability of sulphate resisting slag blended cements and mortars in sea water Authors: EI-Didamony, H; Amer, A A; Helmy, I M; Mostafa, K Abstract: The hydration characteristics as well as the sea water attack of sulphate-resisting slag content up to one year have been studied. The results show that with the increase in slag content the rate of hydration of cement pastes in water decreases. The compressive strength of the cement mortars immersed in sea water increases up to 6 months then decreases. The free lime content decreases with time due to the reaction of chloride ions with Ca(OH)₂ The CI^- and SO₃ contents increase with time of immersion in sea water. Page(s): 35-40