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  Digital Catalogue for Technology and Products Development

   Technology and Product Development

    Basic Information

Technology developed: Fly ash geopolymer stabilized reclaimed asphalt pavement base (FRB) for pavement construction (TP19763801530)
Category: Product (Hardware/Material/Software)
Details of Inventor(s):
Inventor Institution/Organization/Company Department Designation
Prof. Sireesh Saride IIT Hyderabad Civil Engineering Professor
Technical Application Area: Construction
If 'Other', please specify:
Please give more details of new technical application area:
Availability of high quality aggregates for the construction of highways are scarce, hence the cost of construction has become prohibitively high due to increased lead distance. To note, about 12,000 tons of natural aggregates are required to build one lane-kilometre of a national highway. If the existing distressed pavements are cycled, the recycled aggregates (RAP) with a suitable stabilization process can solve the issue. To enhance the properties of recycled aggregates, fly ash geopolymers are may be very successful and economical, especially with RAP, in recent times. However, the current guideline is silent about design procedures to adopt fly ash geopolymer stabilized recycled aggregates (IRC, 2018) in pavement construction. This is due to an existing gap in the understanding of these materials in terms of structural and long-term durability characteristics. Hence, this study focused on developing a new sustainable material that includes fly ash and recycled aggregates to perform as a road construction material
Indian Institute of Technology (IIT) Hyderabad
Affiliated Ministry: Institution Funding (Self Supported)
Type of technology development: Indigenous
Does the technology help in replacing any import items currently
procured from outside India?
Does the technology have export potential? Yes
Category of Technology developed: Futuristic
Stage of Development: Field Test
Please describe in detail including the TRL Level:
The reach team at IITH has an extensive experience with the fly ash geopolymer stabilized RAP bases Saride et al 2010 Avirneni et al 2016 Saride et al 2020. The strength and stiffness of the RAP VA blends prepared at 60 40 ratio are found to enhance by about 6 fold when stabilized with fly ash geopolymer, referred as a fly ash treated recycled base FRB. As part of the study FRB sections were built on state highway SH 207 near Vijayawada to understand the performance under traffic and climatic conditions. A three year inclinometer data indicates that the FRB section is performing at par with the control section. Based on a detailed cost benefit analysis performed with reference to the laboratory and field pilot studies, it was estimated that FRB could save 30% material and 19.7 percentage cost of construction.


Applications: To replace the conventional base layer with natural aggregates in a flexible pavement system. To use as a lean concrete for loading platforms parking lots and foundation bedding.
Advantages: The existing guidelines (abroad) allow cement stabilized RAP to replace up to 20 percentage to 30 percentage of natural aggregates. The current product has many advantages: FRB can replace up to 80 percentage of natural aggregates Reduces the cost of construction by about 20 percentage Reduces the demand on natural aggregates by about 30 percentage Reduces the carbon foot print due to less demand on the quarry operations for the natural aggregates and there by reduces demand on fossil fuel consumption. 5. Eliminates the use of cement or lime which in-turn reduces the carbon foot print as this product uses fly ash (an industrial by-product). 6. Reduces the burden on landfilling wit fly ash. Current rate of fly ash in construction is about 65 percentage to 70 percentage, with this product, the consumption rate goes up to 80 percentage fly ash produced in India

    Technology Inputs:

Imported Equipment/Spare Parts:
Equipment/Spare Parts Year ITC-HS Code
Indigenous Equipment/Spare Parts:
Equipment/Spare Parts Year ITC-HS Code
Imported Raw Materials:
Raw Materials Year ITC-HS Code
Indigenous Raw Materials:
Raw Materials Year ITC-HS Code
Existing R&D Facilities used:
Facilities Year ITC-HS Code

    R&D Investment:

R&D investment (Rs. in Lakhs):                    
Indian Source (Rs.) Foreign Source (Rs.) Year
0 0 NA

   Patents & Publications:

Filed Patents (No.) Granted Patents (No.) Year
0 0 NA
Submitted (No.) Published (No.) Year
0 8 NA

    Commercialization Potential:

Who are the Potential Licensees? IIT Hyderabad
What commercially available products address
the same problem?
Company Product Problem Addressed
So far there are no commercial products available
Would you like to develop this invention further with
corporate research support?
Would you be interested in participating in cluster based
programs for commercialization research or business
planning for your invention?
      Submitted by: The Dean R and D Date of Submission: 5-8-2020

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