About Qaqccivil

About Qaqccivil

Qaqccivil is a hands-on reference hub for quality assurance and quality control in civil engineering. It exists because the fine points that decide how a pavement, sub-base or concrete layer really performs — aggregate grading, blending ratios, a moisture reading you can trust — are rarely collected in one easy-to-reach place. The site is curated by Tapas Kumar Sarkar, who records the methods, checks and mix-design figures taken from actual construction projects. Every article is rooted in the governing specification codes — MORTH, IRC and IS — and walks through the procedure step by step, from sampling individual materials to the final result.

Why Qaqccivil exists

QA/QC skills are often learned on site, under time pressure, from whoever happens to be available. The reference codes are thorough but dense, and the gap between a clause in a specification and a decision at the batching plant can be wide. Qaqccivil closes that gap by turning code requirements into practical, numbered steps: test the 20 mm and 10 mm coarse aggregates together with the stone dust or river sand, blend them in a proportion that lands near the mid-value of the specified limits, and record what you did so the next person can repeat it. That is the thinking behind articles such as the mix design of Dry Lean Concrete (DLC), the methodology and mix-design data for Granular Sub-Base (GSB), and the calibration of a Rapid Moisture Meter (RMM) against oven-dry samples. Each one is written for the engineer or technician who has to carry out the work, not just approve it.

What we cover

• Mix design write-ups. Step-by-step procedures for DLC and similar mixes, covering individual aggregate grading, blending proportions and comparison with the acceptable limits in MORTH, IRC-15, IRC SP-49 and IS-2386.
• Construction methodology. Scope, materials, mixing, spreading and compaction for layers such as GSB, with flow charts and physical requirements set out in order.
• Field testing and calibration. Practical guides to equipment like the Rapid Moisture Meter — how it works, why its readings drift from true moisture content, and how to calibrate it against a known dry sample.
• Reference data. Grading tables, blending ratios and specification extracts kept together so they can be checked quickly on site or in the lab.

Who it is for

Qaqccivil is written for the people who carry quality on a civil project: QA/QC and lab engineers, site supervisors, materials technicians and students heading into highway or pavement work. If you are the one signing the test report, preparing the mix design or explaining to a contractor why a gradation is out of limit, the goal is to give you a clear, code-referenced starting point.

How we work

• Grounded in code. Procedures are tied to the specification they come from, so every step can be traced back to the source.
• Practical first. The focus is on what to do, in what order, and what result to expect — not on theory for its own sake.
• Repeatable. Methods are written so a colleague can follow them and get the same answer.
• Open to questions. If something on the site does not match your site conditions, the contact form is there to ask.

Get in touch

Have a question about a mix design, a test procedure or a specification clause? Send a message through the contact form on the site, and it will be answered as directly as the codes allow.