Concrete Core Test

1. Sample details

Description / structure member Location Grade of concrete Date of coring Date of testing Tested by

2. Core dimensions

Diameter reading 1 (mm) Diameter reading 2 (mm) Diameter reading 3 (mm) Avg. diameter, D (auto, mm) Area, A = πD²/4 (auto, mm²) Height after capping 1 (mm) Height after capping 2 (mm) Avg. height, H (auto, mm) Volume, V = (A×H)/1e9 (auto, m³) H/D ratio (auto) Weight, W (kg)

3. Test data & result

Density, ρ = W/V (auto, kg/m³) Breaking load (kN) Raw compressive strength (auto, N/mm²) Correction factor, F = 0.11×(H/D) + 0.78 (auto) Corrected cylinder strength (auto, N/mm²) Dia factor

4. Result

Equivalent cube compressive strength —

Requirement (grade) —

Conformity —

Equivalent Cube Strength = Corrected Cylinder Strength × Dia Factor × 5/4

Correction factor F = 0.11(H/D) + 0.78 applies for H/D between 1.0 and 2.0; cores are normally drilled/capped to H/D ≈ 1.0–2.0. A commonly used acceptance guide treats the core-derived equivalent cube strength as satisfactory if it is not less than 85% of the specified grade strength (verify against your project specification / IS 516 (Part 5):2018, since this is a project/contract-specific criterion rather than a single universal IS 456 clause).

5. Report

This app saves everything (test data) for the active project in your browser, tied to this folder.

Import data (JSON)