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    "headline": "Denser Concrete Left the Fungus Nowhere to Enter",
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    "dek": "Silica fume and a superplasticizer cut capillary porosity and prevented Aspergillus colonization in a 28-day test.",
    "summary": "Silica fume and a superplasticizer cut capillary porosity and prevented Aspergillus colonization in a 28-day test.",
    "body_text": "Concrete made with 15 percent silica-fume replacement and a polycarboxylate superplasticizer reduced capillary porosity by 40.6 percent, to 4.39 percent, while improving mechanical properties. Control specimens developed Aspergillus biofilms after inoculation; the modified specimens remained free of colonization through 28 days. The result is a controlled materials experiment, not proof of indefinite resistance in field infrastructure.",
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      "The result is a controlled materials experiment, not proof of indefinite resistance in field infrastructure."
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    "tags": [
      "concrete",
      "fungi",
      "infrastructure",
      "materials"
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      "source_id": "source-2026-08-03-004",
      "title": "Construction Materials: silica fume and concrete bioreceptivity",
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    "title": "Denser Concrete Left the Fungus Nowhere to Enter",
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