Insights & Articles
Investigation Blog
Technical articles, industry insights, and expert analysis on structural investigation, GPR scanning, concrete testing, and non-destructive testing from the SiteOps team.
Heritage Building Investigation: Non-Destructive Approaches
Heritage buildings without original construction drawings present unique investigation challenges where traditional destructive sampling methods risk damaging irreplaceable architectural fabric. Non-destructive testing (NDT) techniques provide the only viable pathway to assess...
Pull-Off Adhesion Testing: Verifying Concrete Repair Bond Strength
Pull-off adhesion testing quantifies the bond strength between repair materials and existing concrete substrates, providing critical verification that repairs will perform under service loads. AS 1012.25 establishes the standardised methodology for measuring this interfacial b...
Concrete Resistivity Testing: Rapid Corrosion Risk Assessment
Concrete resistivity directly correlates with the rate of corrosion in reinforced concrete structures, making it one of the most effective rapid assessment tools for evaluating long-term durability risks. When concrete resistivity drops below 10 kΩ·cm, the risk of active corro...
Structural Monitoring: When Watching Is Better Than Fixing
Structural defects don't always require immediate repair. When concrete cracks appear in a 40-year-old office building or differential settlement affects a warehouse foundation, the critical engineering decision is whether to monitor the condition or proceed directly to remedi...
LiDAR 3D Scanning for Structural Documentation
Accurate structural documentation of existing buildings presents a fundamental challenge in asset management and renovation projects. Traditional survey methods often fail to capture the complex geometric relationships and detailed conditions required for modern engineering an...
Chloride Profiling: How Salt Attacks Reinforcement in Concrete
Chloride ions penetrate concrete through diffusion, capillary action, and hydrostatic pressure, creating an electrochemical environment that destabilises the passive oxide layer protecting steel reinforcement. When chloride concentrations exceed critical thresholds at the stee...
Post-Fire Assessment: Can Fire-Damaged Concrete Be Retained?
Fire-damaged concrete undergoes complex physical and chemical changes that significantly affect its structural integrity. Temperature exposure above 300°C causes progressive deterioration of cement paste, aggregate expansion, and microcracking that may not be immediately visib...
Ferroscan vs GPR for Rebar Detection: When to Use Each
Reinforcement detection in concrete structures requires selecting the appropriate non-destructive testing method based on structural geometry, access constraints, and investigation objectives. While both Ferroscan electromagnetic cover meters and Ground Penetrating Radar (GPR)...
Drone Inspection for Structural Assessment: Cutting Scaffold Costs
Structural access for facade inspection traditionally requires extensive scaffolding systems that can cost $200-400 per square metre of building envelope. Drone-mounted inspection systems now provide equivalent visual assessment capabilities at 20-40% of scaffold costs while d...
Schmidt Hammer Testing: Rapid Concrete Strength Screening
Schmidt hammer rebound testing provides rapid, non-destructive assessment of concrete surface hardness as an indicator of compressive strength, but its accuracy depends heavily on surface conditions, concrete age, and calibration against core testing. The method measures the r...
Half-Cell Potential Mapping: Predicting Corrosion Before Damage Appears
Reinforcement corrosion in concrete structures creates measurable electrical potential differences across the concrete surface long before cracking, spalling, or rust staining becomes visible. Half-cell potential mapping exploits this electrochemical principle to identify acti...
Concrete Carbonation: How It Causes Corrosion and How to Test for It
Concrete carbonation occurs when atmospheric carbon dioxide penetrates concrete and reacts with calcium hydroxide in the cement paste, reducing the pH from approximately 12.5 to below 9. This chemical process compromises the alkaline environment that naturally protects embedde...
Structural Investigation vs Inspection: What Is the Difference?
Building owners and asset managers frequently confuse structural investigations with structural inspections, yet these represent fundamentally different assessment approaches with distinct purposes, methodologies, and outcomes. A structural inspection provides a visual assessm...
Infrared Thermography for Building Envelope Assessment
Infrared thermography detects temperature differentials across building surfaces to identify subsurface defects that compromise envelope performance. When moisture infiltration, delamination, or insulation gaps occur within wall assemblies, they create thermal anomalies visibl...
Understanding UPV Testing: Assessing Concrete Quality Without Destruction
Ultrasonic pulse velocity (UPV) testing measures the speed of ultrasonic waves through concrete to evaluate its quality, uniformity, and structural integrity. This non-destructive testing method exploits the fundamental principle that ultrasonic waves travel faster through den...
Do You Need GPR Before Coring Concrete?
Concrete coring without prior scanning can sever post-tensioned cables, damage reinforcement, and compromise structural integrity. The decision to conduct Ground Penetrating Radar (GPR) scanning before coring depends on the structural system, core location, and potential conse...
GPR Scanning Cost in Brisbane: What Affects Pricing
GPR scanning costs in Brisbane vary significantly based on site complexity, access requirements, and the specific structural investigation objectives. While basic concrete slab scanning may cost $15-25 per square metre, complex multi-level investigations with detailed reportin...
As-Built Documentation: Why It Matters Before Your Renovation
Accurate as-built documentation forms the foundation of successful renovation, adaptive reuse, and tenant fit-out projects, yet many building owners proceed with incomplete or outdated structural information. This documentation gap leads to costly design revisions, constructio...
How Deep Can GPR Scan Concrete? Depth, Frequency, and Limitations
Ground penetrating radar depth penetration in concrete structures depends on three critical factors: antenna frequency, concrete composition, and electromagnetic signal attenuation. Higher frequency antennas provide superior resolution for shallow targets but sacrifice depth p...
What Is GPR Scanning and When Do You Need It?
Ground penetrating radar (GPR) scanning is a non-destructive method for imaging what lies beneath concrete, soil, and other materials. Here is when and why you need it.
Concrete Scanning vs X-Ray: Which Technology Is Right for Your Project?
GPR scanning and X-ray (radiography) both image what is inside concrete, but they work differently, cost differently, and suit different situations. Here is how to choose.
5 Signs Your Building Needs a Structural Investigation
Not every crack means danger, but some signs should trigger a professional structural investigation. Here are five indicators that your building needs assessment.