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:

Already Commercialised

Tech. Readiness Level:

Technology Transfer and Business Development
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