Special-Uses-Alkali - Expanded Shale & Clay

4.4. Additional ProductsThe products in this category do not fit into either one of the previous categories of fly ashproducts or Class N products. This is due to the suppliers’ requests to modify the ASTM C 1567test to accommodate the evaluation of their materials. TXI Inc. submitted a lightweight fineaggregate, Holcim submitted a product called GranCem and FMC-Euclid Chemical submittedlithium nitrate admixture. The data information on the TXI lightweight sand and FMC-EuclidChemical’s lithium nitrate can be found in Appendices D and B respectively.4.4.1. HolcimHolcim’s GranCem material is a granulated blast slag cement that is ground into a fine powder,to be mixed with water and Portland cement. Because of this, the GranCem material is claimedto provide ASR and sulfate resistance, low permeability and lower heat of hydration. GranCemwas tested at 35%, 40% and 50% replacement of cement and had expansions at 14 days of0.26%, 0.17% and 0.04% respectively. These bars turned into a very dark green color as the barswere soaked in the sodium hydroxide solution. However, no color changes were observed in theconcrete mix. The expansion results dictated a cement replacement level of 46% in the mixdesign.21