About PCCI
Where concrete science meets infrastructure certainty.
PCCI is a specialist concrete technology consultancy built for the world's most demanding infrastructure. We bring deep technical leadership, proven methodologies, and a no-compromise commitment to quality to every engagement.
Our Story
Built on decades of field-proven expertise. Designed for the future.
PCCI (Precision Concrete Craft and Innovations Pvt. Ltd.) was established in 2024, but the expertise behind it was forged over decades on the most demanding dam sites in South Asia. Our technical leadership's experience spans landmark hydroelectric programs across India, Bhutan, Nepal, and Laos, from the research laboratory to the placement site.
That expertise was shaped by real challenges on real projects: different aggregates, different climates, different structural demands. Each one refined the methodology that PCCI now brings to every engagement: test rigorously, design precisely, and never accept a pour that doesn't meet the standard.
In 2024, Mr. A.K. Sthapak and Mr. Kushal Sthapak co-founded PCCI to formalize this deep knowledge into a dedicated consulting firm. The mission: make world-class concrete technology accessible to every hydroelectric and large-scale infrastructure project that needs it, from compact run-of-river installations to the world's largest gravity dams.
Today, PCCI is building a team of specialist professionals who share that same commitment to technical excellence. Backed by a network of accredited partner laboratories across India, PCCI can design and manage comprehensive testing programs for projects in any location: from trial mix development through 180-day strength evaluation, while maintaining full engineering oversight and quality control.
Serving hydroelectric and large-scale infrastructure projects across South Asia, with growing engagement in Southeast Asian markets, our vision is clear: become the consulting firm that the industry's most critical projects turn to when concrete performance is non-negotiable.
PCCI is the firm we wish existed when these projects started. Now it does.
1980s to 1990s
Roots in Research and Field
The technical expertise that underpins PCCI takes shape across dam construction sites and at the Central Soil and Materials Research Station (CSMRS), New Delhi. Deep knowledge is built at the intersection of concrete technology, rock mechanics, and field engineering.
1990s to 2000s
Pioneering Indian Firsts
Key involvement in India's first RCC dam at Ghatghar, Maharashtra. First mass-scale epoxy concrete application at Singur Dam. Pioneering use of GPR for masonry dam evaluation. Authorship of Indian Standard IS:14591 on thermal control of mass concrete.
2002 to 2012
Landmark Hydropower Programs
Concrete QC and optimization for Tala (1,020 MW) in Bhutan and Karchham Wangtoo (1,000 MW) in India. Cost-effective, high-performance mix designs developed spanning concrete, shotcrete, and grout. The methodologies proven here form the backbone of PCCI's approach today.
2012 to 2023
Multi-Country Track Record
End-to-end QC leadership at Mangdechhu (720 MW) and Punatsangchhu-1 (1,200 MW) in Bhutan. Engagements in Nepal (Tanahu, 140 MW) and Laos (Nam Long 2). Advanced work in durability, AAR mitigation, and eco-friendly high fly ash formulations.
2024
PCCI is Born
PCCI is co-founded by Mr. A.K. Sthapak and Mr. Kushal Sthapak, bringing together decades of proven expertise with a vision to build the specialist concrete technology consultancy the industry needs. Active consulting continues on the Tanahu Hydropower Project in Nepal.
Leadership
Led by experts who've shaped the industry.
PCCI's technical credibility begins with its leadership. Our technical lead has authored national standards, pioneered new concrete technologies, and delivered quality programs on some of the most critical hydroelectric projects in South Asia.
Photo coming soon
Mr. Arvind Kumar Sthapak
Managing Director
Mr. A.K. Sthapak holds an M.Tech in Rock Mechanics from IIT Delhi and a B.E. in Civil Engineering. He is one of South Asia's most experienced concrete technologists, with a career spanning government research, national standards development, and hands-on project leadership across four countries.
During two decades at the Central Soil and Materials Research Station (CSMRS), he played key roles in several Indian firsts: the country's first RCC dam at Ghatghar, the first mass-scale epoxy concrete application at Singur Dam, and the pioneering use of Ground Penetrating Radar for masonry dam evaluation. He authored IS:14591, India's national standard on thermal control of mass concrete, and contributed to the revision of IS 456:2000.
His project leadership spans landmark hydroelectric programs including Tala (1,020 MW) in Bhutan, Karchham Wangtoo (1,000 MW) in India, Mangdechhu (720 MW) and Punatsangchhu-1 (1,200 MW) in Bhutan, and engagements in Nepal and Laos. His specializations include mass concrete mix design, thermal control engineering, cement optimization, durability assessment, AAR mitigation, and QA/QC system design.
M.Tech, IIT Delhi
Rock Mechanics
Author, IS:14591
Thermal Control of Mass Concrete
48+ Publications
International technical papers
4 Countries
India, Bhutan, Nepal, Laos
Professional Affiliations
Rooted in the professional community.
ICI
Indian Concrete Institute
ACCE(I)
Association of Consulting Civil Engineers (India)
ISRMTT
Indian Society for Rock Mechanics & Tunnelling Technology
ISCMS
Indian Society for Construction Materials & Structures
Compliance expertise across international and Indian standards
Our Values
Principles that aren't negotiable.
No-Compromise Quality
Every mix design, every QC protocol, every advisory meets the same standard: the highest one. We don't cut corners because the concrete won't forgive us if we do.
Deep Field Expertise
Our experts bring decades of field experience to every engagement. Whether through on-site supervision or precise technical direction, we ensure every critical pour meets the standard.
Tailored Solutions
Every project gets a customized approach, never off-the-shelf answers. Different aggregates, different climates, different structural demands require different solutions.
Sustainability Through Science
We optimize cement content to reduce both cost and carbon simultaneously. The greenest concrete is the one you don't have to repair. We engineer for 100-year durability.
Knowledge Transfer
We don't hoard expertise. We build capacity. Through training programs, QC manuals, and technology transfer, we leave client teams stronger than we found them.
Full Lifecycle Partnership
From pre-tender material investigation through post-construction rehabilitation, we are with you for the entire journey. Your concrete is our responsibility, start to finish.
How We Work
Embedded expertise, not arm's-length advice.
PCCI integrates directly with your project team. We tailor our engagement to your specific needs, from focused advisory on a single challenge to full-lifecycle consulting.
Assessment & Planning
- Material investigation
- Feasibility studies
- Mix design strategy
- QC framework planning
Construction Support
- Mix design development
- On-site QA/QC
- Material testing
- Thermal control
Post-Construction
- NDT assessment
- Repair guidance
- Performance monitoring
- Life extension
Knowledge Transfer
- Team training
- QC manual preparation
- Technology transfer
- Capacity building
Frequently Asked Questions
About PCCI
What does PCCI stand for?
What is the full form of PCCI in the concrete and dam engineering context?
Who founded PCCI and what is their background?
When was PCCI established?
What makes PCCI different from other concrete consultants?
What are Mr. A.K. Sthapak's qualifications and achievements?
Which professional bodies is PCCI affiliated with?
From the field
Concrete intelligence, not opinions. Lessons from inside dam sites.
Technical insights grounded in real project experience. Written by engineers, for engineers.
Concrete for Intake Structures and Gate Slots in Dams: Precision, Durability, and Embedded Metalwork
Intake structures and gate slots demand the tightest dimensional tolerances and the most durable concrete in any dam project. A gate slot that is 5 mm out of alignment will not seat properly. An intake surface that erodes under high-velocity flow will create turbulence in the penstock. This guide covers the concrete technology requirements for these precision components, from mix design and placement to embedded metalwork coordination and quality verification.
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Adiabatic Temperature Rise Testing for Mass Concrete in Dams
Every serious thermal control plan for a mass concrete dam starts with one input: the adiabatic temperature rise curve. The finite element model needs it. The placement temperature ceiling depends on it. The cooling pipe spacing is derived from it. And almost no practitioner reference explains how the test itself is run. Adiabatic temperature rise testing isolates the heat-generation signature of a specific mass concrete mix from every other thermal variable. The protocol is USBR Procedure 4911 in the United States, with semi-adiabatic alternatives codified by RILEM TC 119-TCE and Indian guidance in IS 14591 and IS 4031 Part 9. This brief walks the test protocol clause by clause, sets out the parameter extraction, quantifies how supplementary cementitious materials change the curve, and shows how the result feeds the thermal control plan PCCI applies on dam concrete projects.
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ICOLD Bulletin 177 (RCC Dams): A Practitioner's Walkthrough
ICOLD Bulletin 177 is the international consensus reference for roller-compacted concrete dams, published in 2020. It replaces Bulletin 126 (2003) and absorbs 15+ years of RCC technology evolution: high-paste vs lean-paste proportioning, GERCC and IVRCC facing, modern lift-joint treatment, super-retarded high-workability RCC, and an expanded RCC arch dams chapter driven by Chinese practice. For Indian dam engineers, Bulletin 177 fills a specific gap. IS 457 (1957) has no RCC provisions. ACI PRC-207.5-11 is US-centric. The reference that ties global RCC practice into one document is Bulletin 177, and most modern Indian RCC tenders invoke it explicitly. This brief walks the bulletin chapter by chapter, documents the delta from Bulletin 126, sets out the specification language for invoking it on Indian projects, and frames where it fits alongside ACI PRC-207.5 and IS 456 in a dual-standard concrete spec.
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Sulfate Attack on Dam Concrete: Mechanisms, Standards, Mitigation
Sulfate attack is the durability mechanism that consumes dam concrete from the foundation contact upward, from gypsum-bearing groundwater inward, and from inside the concrete itself when early-age temperatures cross thresholds the mass concrete designer never anticipated. Four distinct mechanisms (external sulfate attack, internal sulfate attack, delayed ettringite formation, and thaumasite sulfate attack) act through different chemical pathways and demand different mitigation strategies. The C3A content of the cement matters; the w/cm matters; the SCM strategy matters; the early-age temperature ceiling matters. This brief walks the four mechanisms, the diagnostic signs, the ACI 318 and Indian-standards framework, and the mitigation strategy that PCCI applies on dam projects with documented or suspected sulfate exposure.
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Hold and Witness Points for Dam Concrete: An 18-Point Reference for QA/QC
Hold and Witness points are where a paper QA/QC plan becomes an enforceable construction-phase mechanism. They are also the single largest source of disputes between Contractor and Owner's Engineer on hydropower dam projects. The register is not a long list. Eighteen points cover every gate a dam-concrete pour cycle realistically needs, from aggregate source acceptance through post-pour acceptance/repair/reject disposition. Anything less leaves the Engineer without enforcement leverage; anything more produces friction without protection. This brief sets out the 18-point reference register, classified to FIDIC and ISO 9001:2015 frameworks, with the verification basis, evidence required, common failure mode, and PCCI-recommended practice for each gate.
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Diagnosing Concrete Cracking on a Dam Construction Site: A Field Workflow for Owner's Engineers
Every concrete dam programme produces cracks. Some are predicted by the design. Some are tolerated by the specification. Some are warnings that something is wrong. The owner's engineer's job is not to be surprised by the existence of cracks. The job is to distinguish, fast, between cracks that the structure will live with for 100 years and cracks that the structure will fail because of. This is the field workflow used to make that distinction. It runs in five steps: observe, classify, diagnose, assess severity, decide response. It takes 60 to 90 minutes for a typical crack pattern on a dam site. The decision it produces guides the next 20 to 50 years of the structure's life. The workflow is not a substitute for engineering judgment. It is a discipline that ensures the judgment is applied to the right evidence in the right order. Skipping a step is how owner's engineers miss what they were brought on site to catch.
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Accept, Repair, or Reject Concrete: A Decision Framework for Dam Construction
Every hydropower dam construction programme produces non-conforming concrete at some point. A cube fails at 28 days. A dimensional check shows the wall is 12 mm off. Honeycombing appears after form stripping. UPV readings on a lift show velocities outside the acceptance band. The contract specification calls for action, but does not always tell the engineer which action. The decision is not whether to act. The decision is which of five possible responses to choose: accept as is, accept with restrictions, repair and accept, reject and replace, or investigate further. The five outcomes are bounded by standards. The decision among them is bounded by engineering judgment. This is the practitioner decision framework, anchored on IS 456 Clause 17, ACI 318 Section 26.12, and ACI 562, refined across more than 4,000 MW of hydroelectric concrete placement.
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DRIP Phase II Concrete Specifications: What the Tender Actually Asks For
India's Dam Rehabilitation and Improvement Project Phase II is now operational across 19 states and 3 central agencies, with 736 dams scheduled for rehabilitation under Phases II and III at a combined budget outlay of ₹10,211 crore, of which ₹7,000 crore is external loan from the World Bank and the Asian Infrastructure Investment Bank. The construction work has begun. The tenders are flowing. The contractors bidding on the work need to know what concrete specifications the DRIP Phase II tenders actually contain, and what the technical complexity behind those specifications looks like. This article is a practitioner's walkthrough of typical DRIP Phase II concrete rehabilitation specifications. It identifies seven major work categories that recur across DRIP tenders, what the typical specification clauses cover for each, what materials and methods the specifications usually call for, where the technical complexity lies, and what the common bidder mistakes are. The article does not reproduce specific project tender values, which are project-specific and protected. It describes the standards backbone, the practical workflow, and the practitioner judgment that DRIP work demands. Drawing on leadership experience across more than 4,000 MW of mass-concrete dam construction in India, Bhutan, and Nepal, and on the broader concrete quality and rehabilitation framework that maps directly onto DRIP work.
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