Technology Profile

Title of Product / Design / Equipment:

Corrosion Resistant inhibitive admixture for Portland Pozzolana Cement.

IPR Status Patent/ Copyright /Trademark
secured in Indian/Abroad IPR Details:

Already patented.

• Patent No: 1421 / Del / 99.

Application/Uses:

*The process involves a simple step of adding inhibitors during manufacturing of cement or while making concrete at site.

• *The added chemicals are in powder form and can be mixed at the factory itself, while producing cement or during making concrete.
• *This product can be used for constructions in aggressive marine environments, since it is more corrosion resistant than normal cement due to the inhibitive nature of the added compounds.

Salient Technical Features including
Competing Features:

• Table 1 Physical Properties

  Test	PPC	Inhibitor admixed PPC
  Compressive Strength {N/mm 2 } Mortar specimens (3 days) Mortar specimens (7 days) Concrete specimens (28 days)	16.00 17.75 387	16.50 19.83 387
  Tensile Strength {N/mm 2 }	1.240	1.260
  Consistency [for 33 mm penetration]	0.328	0.290
  Initial setting time (minutes)	149	135
  Final setting time (minutes)	345	330

  Table 2 Corrosion resistant properties of cements

  Performance Studies	Added chloride ( ppm)	PPC	Inhibitor admixed PPC
  Weight loss {Corrosion Rate - mmpy }	10000	0.0191	0.0029
  Electrochemical Impedance (Rct value) {K ohms cm 2 }	10000	3.591	49.377
  Linear Polarization resistance (Rp value) {K ohms cm 2 }	10000	6.220	31.554
  Anodic Polarization Potential (mV) Initial	1000	0.750	1.100
  Final		0.250	1.000
  Peak potential Current {micro ampere}	10000	110	0. 325

Commercialization Status:

Commercialized