...MDA Thomas; MH Shehata; SG Shashiprakash Fly ash has been used as a pozzolanic admixture in concrete for more than 50 years. Earlier uses were largely confined to low-calcium ashes from hard bituminous or anthracite coals. However, increased demand for fly ash coupled with the declining...

...H Wang; JE Gillott This paper describes the effect of three natural zeolite-containing pozzolanic admixtures on expansion of mortar bars caused y alkali-silica reaction (ASR). Heulandite is present in all three samples, and clinoptilolite may be also present in one sample. Silica is also present...

...RE Richter; TS Poole Problems were encountered in the use of the reference method as given in ASTM Test Methods for Chemical Analysis of Hydraulic Cement C 114 for chemical determination of iron in certain cementitious materials including pozzolans, slags, and blended cements. Investigational work...

..., physical properties, pozzolan, slags~specifications, sulfate attack, sulfate-resisting cement, sulfates, X-ray diffraction Soon after its formation in 1902, the United States Reclamation Service (Water and Power Resources Service, Department of Interior) became aware of the destructive effects of sulfates...