Effect of Hydrochloric Acid on Compressive Strength of Flyash based Geopolymer based Recycled Aggregate Concrete

L.V. Lokesh Naik, Prof. H. Sudarsana Rao and Vaishali G Ghorpade

In concrete, the main constituent material is Portland cement. The major problem in manufacture of Portland cement is environmental pollution created by its production. This pollution can be reduced by using industrial by--products such as quarry stone dust, fly ash and recycled coarse aggregate etc., Geopolymer concrete (GPC) is one such alternative to normal concrete where cement is not all used. In the present work, geopolymer concrete is produced using flyash as binding material, natural river sand fine aggregate is replaced with quarry stone dust (QSD), the natural granite coarse aggregate is replaced amid recycled aggregate (RCA) and alkaline liquids are used for polymerization. In this work, NAOH and Na2SiO3 solutions are used as alkaline liquids for the polymerization. Experimental investigation has been carried out on durability of geopolymer concrete so produced. The workability was found by compaction factor test and vee-bee test. Compressive strength is determined for every mix. The GPC cubes are tested for 28 days strength by ambient curing and for 30, 60, 90 days strength after exposure to hydrochloric acid and its effect on the strength of GPC is evaluated.

Volume 11 | 06-Special Issue

Pages: 571-577