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Development of Pre-packaged, High Performance Grout (HPG) using Locally Available Cementitious Materials for the Indian Post-Tensioned (PT) Concrete Industry

Primary Information

Domain

Sustainable Habitat

Project No.

7711

Sanction and Project Initiation

Sanction No: F.No.3-18/2015-T.S-I(Vol.III)

Sanction Date: 23/02/2017

Project Initiation date: 31/03/2017

Project Duration: 24

Partner Ministry/Agency/Industry

Ministry of Human Resource Development Ministry of Housing and Urban Poverty Alleviation UltraTech Cements L&T Construction

 

Role of partner:

 

Support from partner:Partner 1 (UltraTech cements) provided all the materials required for the research. The pre-blending and pre-packaging was carried out at UltraTech blending facility. Partner 2 (L&T construction) will be helping in the large-scale prototype testing.

Principal Investigator

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Radhakrishna G Pillai
Indian Institute of Technology Madras

Host Institute

Co-PIs

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Manu Santhanam
Indian Institute of Technology Madras

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Ravindra Gettu
Indian Institute of Technology Madras

 

Scope and Objectives

i) To identify and characterize the locally available materials (cement, fly-ash, and chemical admixtures, etc.) and produce pre-packaged, high-performance grout (HPG) in large-scale ii) To perform large-scale prototype tendon grouting tests and perform pilot implementation in structures iii) To commercialize the HPG and submit a draft pre-normative standard/specification on grout products and grouting processes for post-tensioned concrete applications and submit to Bureau of Indian Standards (BIS), Indian Road Congress (IRC), and various relevant ministries for further implementation.

Deliverables

i) A pre-packaged, high performance grout (HPG) made of indigenous technology and locally available raw materials for use in many construction sites. ii) Documents with recommendations on good grouting practices for Indian sites iii) Pre-normative standards/specifications on grout material selection and acceptance criteria for further implementation by Bureau of Indian Standards (BIS) and Indian Road Congress (IRC). iv) Workshops and Deminars for disseminating the knowledge gained and commercialization of the HPG developed

 

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Videos

NA

Scientific Output

1. A set of stringent and comprehensive performance specifications for the grouting materials and grouting operations. 2. The systematic methodology for the mix proportioning of pre-blended grout materials incorporating different SCMs and chemical additives for the use in PT systems.

 

Results and outcome till date

1. A set of comprehensive and stringent performance specifications were proposed. 2. A good quality pre-packed grout material with high fluidity and better bleed resistance was developed as part of this project. The developed grout has met all the criteria set in the performance specifications.

 

Societal benefit and impact anticipated

The growing use of post-tensioned concrete systems in today's construction industry demands a durable protection system for achieving the target service life. A good quality pre-blended grout must be developed to address this issue. In the current scenario, wherein PT construction is gaining a huge momentum in the developing world, it is critical to sensitize on the quality of grout materials available in the market and the associated premature corrosion problems.

Next steps

1. Pilot production of developed grout material 1. Large-scale prototype study and performance evaluation

Publications and reports

1) Mohan, M. K., Pillai, R. G., Santhanam M., and Gettu R., "Fresh properties of the Cementitious Grouts for Post-Tensioning Applications," Proceedings of the International RILEM workshop on Rheological Measurements of Cement Based Materials (IRWRMC), University of Artois, Arras, France, May 30-31, 2018. 2) Mohan, M. K., Pillai, R. G., Santhanam M., and Gettu R., "Performance Specifications for the Cementitious Grouts used for Post-Tensioning Applications," Proceedings of the 4th International Conference on Service Life Design for Infrastructures (SLD4), RILEM Week 2018, TU Delft, The Netherlands, August 26-29, 2018. 3) Mohan M. K., Pillai, R. G., Santhanam M., and Gettu R., " Performance specifications for the pre-blended cementitious grouts for use in post-tensioned concrete systems," Proceedings of the 3rd R.N. Raikar Memorial International Conference and Gettu-Kodur International Symposium, Mumbai, India, December 14-15, 2018.

Patents

The provisional patent filing is under process

Scholars and Project Staff

Project Staff 1: Sruthy Menon from 10/10/2018 to 31/01/2019 Project Staff 2: Kiran Ram P. P. from 01/12/2018 to 30/03/2019

Challenges faced

NA

Other information

NA

Financial Information

  • Total sanction: Rs. 3636000.00

  • Amount received: Rs. 3636000.00

  • Amount utilised for Equipment: Rs. 838707.00

  • Amount utilised for Manpower: Rs. 641733.00

  • Amount utilised for Consumables: Rs. 142278.00

  • Amount utilised for Contingency: Rs. 128422.00

  • Amount utilised for Travel: Rs. 0.00

  • Amount utilised for Other Expenses: 0.00

  • Amount utilised for Overheads: Rs. 606000.00

Equipment and facilities

 

Frequency response analyzer