ISSN 2415-1297 (Online)   ISSN 2415-1300 (Print)
 
             
 
Volume : 27 Issue : 3 Year : 2019
 
Hydrothermal Reactions between Lime and Aggregate Fines I. Experimental Conditions for Strength Improvement Using Saturated Steam at Atmospheric Pressure [Med J Islamic World Acad Sci]
Med J Islamic World Acad Sci. 1993; 6(2): 140-144

Hydrothermal Reactions between Lime and Aggregate Fines I. Experimental Conditions for Strength Improvement Using Saturated Steam at Atmospheric Pressure

S. Alam Khan, Y. Ali Talib
From PCSIR Laboratories, PO Peshawar University, Peshawar 25120, Pakistan.

A comparison of the compressive strength has been made through hydrothermal reactions of lime and silica sand. Various additives, such as china-clay, Na2CO3, CaSO4, 2H2O, slate, fire-clay and Na2SiO3 have been employed in order to get the higher strength. The compressive strengths and mineralogy were determined for various mixtures of lime and aggregate fines autoclaved at a steam pressure of 0.1 MPa (100C) for 6, 12, 18, 24 and 48 hours. A maximum strength of 25.0 MPa was recorded after 48-hours reaction between 80% silica sand, 15% lime and 5% china clay, whereas if the reactants are only silica sand (85%) and lime (15%), they lead to lower 48-hours strength (11.3 MPa). The cementitious product identified was calcium hydro-silicate.

Keywords: Hydrothermal reactions, compressive strength, mineral additives, atmospheric pressure.


S. Alam Khan, Y. Ali Talib. Hydrothermal Reactions between Lime and Aggregate Fines I. Experimental Conditions for Strength Improvement Using Saturated Steam at Atmospheric Pressure. Med J Islamic World Acad Sci. 1993; 6(2): 140-144

Corresponding Author: S. Alam Khan, Pakistan


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