That was it. The contractor had used lightweight aggregate but ignored that note. The top of the parking garage had curled just enough—less than an inch—to snap two tension cables last night.
Maya stared at the PDF on her screen—. Fourteen years old, but still the bible for lightweight concrete. Her boss had grunted, “Figure out why the deck’s failing,” before leaving for lunch.
She scrolled past the dense tables of dry loose bulk density and shear strength. Page 23. Creep and shrinkage . A footnote, faded in the scan: “For prestressed members, differential shrinkage may exceed predictions by 15–20%.”
That was it. The contractor had used lightweight aggregate but ignored that note. The top of the parking garage had curled just enough—less than an inch—to snap two tension cables last night.
Maya stared at the PDF on her screen—. Fourteen years old, but still the bible for lightweight concrete. Her boss had grunted, “Figure out why the deck’s failing,” before leaving for lunch. aci 213r-14 pdf
She scrolled past the dense tables of dry loose bulk density and shear strength. Page 23. Creep and shrinkage . A footnote, faded in the scan: “For prestressed members, differential shrinkage may exceed predictions by 15–20%.” That was it