Precipitated Calcium Carbonate as Partial Cement Replacement Material for Concrete Production

Abstract

Developing And Emerging Countries During Their High Growth Phase Consume A Large Quantity Of Cement Because Of Their Needs For Infrastructure. To Accommodate Infrastructure Demands, Sustainability In The Concrete Construction Industry Has Become A Subject Of Great Concern,Precipitated Calcium Carbonate Substitution Strategy Of Cement Is A Most Effective Way For Sustainability. Aim Of This Study Is To Investigate The Effect Of Precipitated Calcium Carbonate Powder On Concrete Production. PCC Powder Was Directly Incorporated And Mixed With Cement Powder And Other Concrete Ingredients To Prepare Concrete For Further Laboratory Tests. Laboratory Test Was Conducted By Comparing Control Mix Of Grade C-25mpa, 360kg/M3cement Content With Experimental Mix And Concrete Workability Test, Compressive Strength Test, And Hardened Concrete Durability Test Of Water Penetration Depth Was Conducted By Keeping Constant Water To Cementitious Material Ratio 0.5 For Both Mixes. Physical And Chemical Properties Of Precipitated Calcium Carbonate (PCC) Tested And Directly Incorporated To Concrete Mix Design Proportion With Replacement Level Of 10%, 15% And 20% To Portland Cement. The Experimental Results Showed That The Concrete Mix With PCC Replacement Possess A Higher Slump, From 50mm, 55mm, 65, And 75mm Respectively For Control Mix, 10%, 15% And 20% PCC Which Increased The Workability. The Compressive Strength Of Concrete Containing 10% PCC Powder Shows Remarkable Improvement And Exceeds Control Mix By 14.32%, 16.79% And 8.77% Respectively For 3-, 7- And 28-Days Curing Period. However, PCC With More Than 10% Replacement At 15% And 20% Exhibit Slight Decrease In Compressive Strength. Moreover, PCC 10% Incorporation Also Shows Improvement On Water Penetration Depth For Hardenedconcrete Durability Evaluation Which Is 23.9mm And 23.8mm For Control And 10% PCC At The Age Of 28 Days Curing Duration. Eventually, PCC Partial Replacement Effect Can Make The Paste Matrix And The Interfacial Transition Zone Between Matrix And Aggregate Denser, Which Will Improve The Performance Of Concrete At Optimum PCC Content Addition And This Makes PCC Powder The Promising Profound Sustainable Cementitious Material For Concrete Production.