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 In masonry construction, poor mortar bonding is a common pain point that leads to reduced wall strength, hollow joints, cracks, and even water leakage. So, why does mortar often fail to bond with bricks, and how can it be prevented? 1. Common Causes Low Mortar Strength Grade Using low-grade or pure cement mortar results in poor workability, making it hard to compact. This often causes voids in mortar joints, leading to insufficient bonding. Early Mortar Dehydration Bricks absorb water too quickly, causing the mortar to lose moisture and bond strength. Dust on the brick surface further reduces adhesion. Improper Construction Methods With the bedding method, if mortar is spread too long in advance, its water is absorbed prematurely, and bonding is lost. Excessive Joint Recession In fair-faced brickwork, workers sometimes leave large recessed joints (over 20mm) to skip joint finishing, reducing mortar fullness and increasing later jointing work. 2. Preventive Measur...

What to Check When Aggregates Arrive On-Site? For coarse aggregates: monitor particle size, gradation, shape, stone powder, and clay lumps. Inspect every truck visually — reject non-conforming loads. Test by batch per standard. For fine aggregates: control fineness modulus, silt, and clay lumps. Also inspect each load visually and batch test accordingly. What Is Aggregate Gradation? It’s the proportion of particles of various sizes. Proper gradation improves concrete density, strength, and workability. Why Limit Flaky & Elongated Particles? High content weakens bonding and lowers strength. In pumped concrete, they block pipelines. Limit to ≤10% for pumpable mixes. What Is Internal Curing with Lightweight Sand? Add lightweight sands (e.g., ceramic sand) to high-strength mixes to internally release water, reducing shrinkage without compromising strength. What Happens If Sand Is Too Fine? Increases water demand, reduces pumpability and strength, and increases cracking risk. What...